NOTE - mpkylma.fi

Transcription

NOTE - mpkylma.fi

YUTAKI SERIES
Technical Catalogue
Air-to-water
Heating Chiller:
RHUE3AVHN
RHUE4AVHN
RHUE5AVHN
RHUE5AHN
Specifications in this manual are subject to change without notice in order that
HITACHI may bring the latest innovations to their customers.
Whilst every effort is made to ensure that all specifications are correct, printing errors
are beyond Hitachi’s control; Hitachi cannot be held responsible for these errors.
Contents
Contents
Page 5
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Yutaki features and benefits
1
General data
2
Dimensional data
3
Capacities and Selection data
4
Working range
5
Refrigerant cycle and hydraulic circuit
6
System configurations (available accessories)
7
Electrical data
8
Electrical wiring
9
Troubleshooting
10
Contents
General contents
1. Yutaki features and benefits.........................................................................................15
1.1. Choice benefits...................................................................................................................................... 16
1.1.1. Range of YUTAKI units.................................................................................................................................... 16
1.2. Operating benefits................................................................................................................................. 17
1.2.1. High efficiency system..................................................................................................................................... 17
1.2.2. Broad range of working temperatures.............................................................................................................. 18
1.3. Functionality benefits............................................................................................................................. 19
1.3.1. Operating modes.............................................................................................................................................. 19
1.3.2. User-friendly..................................................................................................................................................... 19
1.3.3. Multiple operating conditions............................................................................................................................ 19
1.4. Installation benefits................................................................................................................................ 20
1.4.1. Compact and lightweight units (3~5 HP units)................................................................................................. 20
1.4.2. Water piping..................................................................................................................................................... 20
1.4.3. Easy installation and maintenance................................................................................................................... 21
1.4.4. Easy and flexible communication installation................................................................................................... 21
1.5. Main features of the components.......................................................................................................... 22
1.5.1. High-efficiency refrigerant circuit...................................................................................................................... 22
1.5.2. Highly efficient scroll compressor exclusive to HITACHI.................................................................................. 23
1.5.3. Reduced noise level......................................................................................................................................... 26
1.6. Start-up benefits....................................................................................................................................... 27
1.6.1. Easy start-up.................................................................................................................................................... 27
1.6.2. Service checking tool....................................................................................................................................... 27
1.7. Maintenance benefits............................................................................................................................ 28
1.7.1. High reliability................................................................................................................................................... 28
1.7.2. Designed for easy maintenance....................................................................................................................... 28
1.8. Many options and accessories available............................................................................................... 28
2.
General data.............................................................................................................29
2.1. Air-to-water units................................................................................................................................... 30
2.1.1. General data.................................................................................................................................................... 30
2.2. Main component data............................................................................................................................ 31
2.2.1. Air side heat exchanger and fan....................................................................................................................... 31
2.2.2. Compressor...................................................................................................................................................... 31
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Contents
General contents (cont.)
3. Dimensional data..........................................................................................................33
3.1. Dimensional drawing................................................................................................................................ 34
3.1.1. Dimensions...................................................................................................................................................... 34
3.1.2. Service space.................................................................................................................................................. 34
3.2. Structural drawing.................................................................................................................................... 35
4. Capacities and selection data......................................................................................37
4.1. Selection procedure for YUTAKI units...................................................................................................... 38
4.1.1. Selection parameters....................................................................................................................................... 38
4.1.2. Selection procedure......................................................................................................................................... 39
4.2. Maximum heating capacities.................................................................................................................... 46
4.3. Capacities and COP................................................................................................................................. 49
4.4. Correction factors..................................................................................................................................... 50
4.4.1. Defrosting correction factor.............................................................................................................................. 50
4.4.2. Correction factor owing to use of glycol........................................................................................................... 51
4.5. Partial load performance.......................................................................................................................... 52
4.6. YUTAKI circulating pumps data................................................................................................................ 54
4.7. Noise data................................................................................................................................................ 55
5.
Working range..........................................................................................................59
5.1. Power supply......................................................................................................................................... 60
5.2. Working range....................................................................................................................................... 60
6. Refrigerant cycle and hydraulic circuit..........................................................................61
6.1. Refrigerant cycle...................................................................................................................................... 62
6.2. Refrigerant charging quantity................................................................................................................... 63
6.3. Hydraulic circuit........................................................................................................................................ 64
6.3.1. Water piping..................................................................................................................................................... 64
6.3.2. Minimum water volume description.................................................................................................................. 65
6.3.3. Water control.................................................................................................................................................... 67
6.3.4. Water check valve............................................................................................................................................ 67
6.3.5. Pump kit installation (accessory)...................................................................................................................... 68
6.3.6. Water electric heater installation (accessory).................................................................................................. 73
6.4. Drain piping........................................................................................................................................... 76
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Contents
General contents (cont.)
7.
System settings (available accessories)..................................................................77
7.1.Available systems...................................................................................................................................... 78
7.1.1.“Monovalent” Systems...................................................................................................................................... 78
7.1.2.“Mono-Energy” Systems................................................................................................................................... 79
7.1.3. “Parallel Bivalent - Direct” Systems................................................................................................................. 81
7.1.5. “Series Bivalent - Direct” Systems ................................................................................................................. 83
8. Electrical data...............................................................................................................87
8.1. Electrical data........................................................................................................................................... 88
9. Electrical wiring............................................................................................................89
9.1. General check.......................................................................................................................................... 90
9.2. Wiring size................................................................................................................................................ 90
9.3. Setting of the DIP Switches...................................................................................................................... 91
9.3.1. Dip switch setting and meaning....................................................................................................................... 91
9.3.2. Dip switch factory set....................................................................................................................................... 92
10. Troubleshooting..........................................................................................................93
10.1. Alarm code display................................................................................................................................ 94
10.2. General indication................................................................................................................................. 94
10.3. Alarm indicatio....................................................................................................................................... 95
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Contents
MODEL CODIFICATION
List of air-to-water units and accessories available in this technical catalogue
YUTAKI UNITS
AVHN UNITS
Unit
AHN UNITS
Unit
Code
RHUE3AVHN
9E311100
RHUE4AVHN
9E411100
RHUE5AVHN
9E511100
Code
1~
Meaning of model codification:
Unit Type (made in Europe)
Compressor power (HP) 3/4/5
Air-to-water unit
Single phase
Heating only
Low ambient temperature
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TCGB0044 rev 0 - 08/2008
9E531100
RHUE5AHN
3~
RHUE
5
A
V
H
N
Contents
LIST OF ACCESSORY CODES
Accessory
Name
Code
Water temperature sensor
9E500004
RMPID1
Extension controller
9E500005
CCW11
Pump kit 1 (with pipe)
9E500001
CCW21
Pump kit 2 (with pipe)
9E500001
EH61
Heater 6 kW
Pending by HEF
BDHM1
Hydraulic separator
BDHM1
VID3V1
3 way valve
Pending by HEF
CDH2Z1
Disconnection vessel
CDH2Z1
ASMSH1
Aquastat
ASMSH1
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Figure
System description
System description
YUTAKI is a heating and sanitary hot water solution for the home with high energy
efficiency.
With the aim of reducing energy expenditure, there is a clear trend in the market
to use medium and low temperature heating systems. Technological advances
and improvements in insulation in the home enable to use of low temperature
water to heat homes. This results in more comfort and greater energy efficiency.
YUTAKI meets the necessary conditions to provide this type of application,
fulfilling users’ needs.
¡¡ Free energy
Instead of burning fossil fuels like conventional boilers, heat pumps extract the
heat present in the air, increase its temperature and transmit it to the water in the
system through an exchanger. The hydrokit then circulates it around the inside,
where the heat is taken to radiators, fan-coils or underfloor heating components.
The hydrokit does not require any extra service space, since it is built into the
YUTAKI module and it contains all of the system’s and user’s controls.
Instead of burning fossil fuels like conventional boilers, heat pumps extract the
latent heat energy present in the floor, air or water. The YUTAKI air/water system
extracts enough heat from the outside air to heat a home to a comfortable
temperature, even on the coldest winter day.
While conventional boilers can only achieve energy efficiency levels under 1,
the YUTAKI system can attain efficiency of over 4. This means less electrical
consumption and therefore a reduction in CO2 emissions.
YUTAKI unit
¡¡ Easy and flexible installation.
The YUTAKI system is straightforward and flexible. It does not require chimneys,
fuel tanks or natural gas connections. Its main components are an outdoor unit
and a hydrokit (located in the outdoor unit) to supply the indoor system.
The YUTAKI module is designed to be installed outside houses or apartments,
whether old or new, even when space is limited.
The YUTAKI system can also be connected to low temperature radiators and to
underfloor heating elements.
¡¡ Heating and sanitary hot water options
YUTAKI also gives the option of sanitary hot water production, allowing the user
to benefit from the heat pump’s high efficiency and achieve hot water at 65ºC and
above. This is made possible by a specific hot water tank, which is heated in the
heat pump from below using water pre-heated at 55ºC. An electrical resistance, at
the top of the stainless steel tank, increases the temperature in accordance with
the user’s needs.
As well as increased efficiency and reduced CO2 emissions due to the extraction
of free heat from the outside air, the system also boasts proven reliability and
minimum maintenance. YUTAKI provides a comfortable atmosphere all year long,
even in the coldest climates. The popular setting leaves the entire heating load
in the heat pump’s control for 90-95% of the year, and uses a back-up electrical
resistance so that it is responsible for 5-10% of the load on the coldest days. This
option usually results in an ideal balance between installation costs and future
energy consumption, as proven by its popularity in colder climates than ours,
such as Sweden and Norway.
The YUTAKI system comes with many installation options. For instance, the heat
pump can be set so that it provides all of the heating capacity itself, and it can
also be connected in series to boilers supplied with fossil fuels to optimize the
system’s overall energy efficiency.
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Yuyaki features and
benefits
1.Y u t a k i f e a t u r e s a n d b e n e f i t s
This chapter describes the features and benefits of the YUTAKI module
Contents
1. Yutaki features and benefits.....................................................................15
1.1. Choice benefits..............................................................................................................16
1.1.1. Range of YUTAKI units.........................................................................................................16
1.2. Operating benefits.........................................................................................................17
1.2.1. High efficiency system..........................................................................................................17
1.2.2. Broad range of working temperatures...................................................................................18
1.3. Functionality benefits.....................................................................................................19
1.3.1. Operating modes...................................................................................................................19
1.3.2. User-friendly..........................................................................................................................19
1.3.3. Multiple operating conditions.................................................................................................19
1.4. Installation benefits........................................................................................................20
1.4.1. Compact and lightweight units (3~5 HP units)......................................................................20
1.4.2. Water piping..........................................................................................................................20
1.4.3. Easy installation and maintenance........................................................................................21
1.4.4. Easy and flexible communication installation........................................................................21
1.5. Main features of the components..................................................................................22
1.5.1. High-efficiency refrigerant circuit...........................................................................................22
1.5.2. Highly efficient scroll compressor exclusive to HITACHI.......................................................23
1.5.3. Reduced noise level..............................................................................................................26
1.6. Start-up benefits...............................................................................................................27
1.6.1. Easy start-up.........................................................................................................................27
1.6.2. Service checking tool............................................................................................................27
1.7. Maintenance benefits....................................................................................................28
1.7.1. High reliability........................................................................................................................28
1.7.2. Designed for easy maintenance............................................................................................28
1.8. Many options and accessories available.......................................................................28
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1
Yutaki features
and benefits

Choice benefits:
The main features of YUTAKI modules include:
−− High energy efficiency
−−
Can be combined with existing systems
−−
Low noise level
−−
Inverter compressor (wide power range)
−−
Broad scope of applications (flexible according to the type of system)
−−
User-friendly
1.1.Choice benefits
1.1.1. Range of YUTAKI units
The range of RHUE3~5A(V)HN units gives the option of 3~5 HP units. The 5 HP
model also comes in the three-phase version.
Capacity (HP)
YUTAKI units
4
5
RHUE5AHN
RHUE3~5AVHN
3
1. Comercial information
¡¡ Wide power range
MAIN FEATURES
The combination of the scroll compressor and the inverter type continuous control
allow the unit output power
to be adapted
to the system’s thermal energy needs.
CAPACITY
RANGE
They also give the unit high energy efficiency and minimum noise level.
5 Kw
7 Kw
9 Kw
11 Kw
13 Kw
15 Kw
RHUE3AVHN
RHUE 3 AVHN
RHUE4AVHN
RHUE 4 AVHN
RHUE5AVHN
RHUE 5 AVHN
RHUE5AHN
RHUE 5 AHN
Power range in accordance with model
Hitachi Air Conditioning Product SA 2008.
1.1.2. Adaptability to the customer's/system’s needs
Depending on the type of system (existing or new) and the user’s needs, the most
suitable system for each situation can be chosen.
−−
−−
−−
−−
“Monovalent” Systems
“Mono-Energy” Systems
“Parallel Bivalent” Systems (Alternative)
“Series Bivalent” Systems
NOTE
For more information about the various systems, please refer to Chapter 7.
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benefits
I. COMMERCIAL
Operating benefits:
1.2.Operating benefits
MAIN
1.2.1. FEATURES
High efficiency system
¡¡ Maximum output
LIQUID
INJECTION
YUTAKI modules include
more efficient
heat exchangers and a gas injection circuit
that allows maximum output.
Thanks to liquid injection, the unit is able to run also from -10 ºC to -20 ºC
S
Refrigerant flow
¡¡ Reduced power consumption
All Rights Reserved, Copyright © 2008 Hitachi, Ltd.
Highly efficient DC scroll compressor Neodymium magnets in the rotor of the
compressor motor New inverter control
¡¡ Maximum energy efficiency (COP)
Inverter technology and Hitachi’s skilled compressor design and manufacture allow
maximum energy efficiency.
COP
RHUE3AVHN
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1
Yutaki features
and benefits
1. Comercial
information
1.2.2. Broad range
of working temperatures
Operating benefits:
¡¡ Temperature range
MAIN FEATURES
The YUTAKI module provides a broad temperature range
40
Ambient Temperature (ºC DB)
30
20
10
5
0
-5
-10
-20
20
25
30
35
40
45
50
55
60
Hot Water Outlet Temperature (°C)
¡¡ Operating modes
Heat
pump
capac
t
Hea
ity (kW
)
Heat
Pump
only
20ºC
Heat Pump operates
on it’s own down to
the balance point
(installer parameter
P15)
and
dem
)
(kW
Boiler
Heat
Pump
P15
Heat Pump plus
Boiler operate
together
-20ºC
¡¡ Low cooling load (fewer inspections)
Thanks to an optimized design, the cooling load for all of the units in the YUTAKI
range does not exceed 3 kg of coolant. This reduces the inspection frequency
required in accordance with European Regulation 842-2006 in relation to
fluorinated greenhouse gases.
Refrigerante
¡¡ Individual operation
The YUTAKI unit is a compact unit that requires no indoor unit. This directly
reduces installation and subsequent maintenance costs.
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benefits
1.3.Functionality benefits

Functionality benefits:
1.3.1. Operating modes
Hitachi's technology materializes into highly functional machines that are designed to
provide maximum comfort for users.
An example of this are the new technologies used in the YUTAKI series heating
systems.
The straightforward control system allows the user to set the target water
temperature according to each system and the type of atmosphere.
Heat Pump
system controller
1.3.2. User-friendly
It is user-friendly, being controlled with few buttons.
Room unit
Temperature Compensation
1.3.3. Multiple operating conditions
Setpoint calculation
on outside temperature
ating curve selection.
rature limitation
supply setpoint is limited
een the maximum supply
perature and the minimum
ply temperature.
Water Supply temperature (°C)
The control system includes multiple operating conditions in order to optimize the
YUTAKI module’s output.
setpoint shift
ording to the room setpoint, the
ng curve is shifted up or down
19
emperature compensation
TCGB0044 rev 0 - 09/2008
supply setpoint is adjusted
Outside Temperature (DB) (ºC)
1
Yutaki features
and benefits

Installation benefits:
1.4.Installation benefits
1.4.1. Compact and lightweight units (3~5 HP units)
Since it is lighter and smaller less installation space is required, making it easier
to access the machine for installation and subsequent maintenance.
The YUTAKI module requires less installation space than a conventional boiler.
15%
New fan 15% flatter than other
models
The mounting process is simpler, without needing a conduit pipe for the
combustion smoke fumes.
1.4.2. Water piping
Compact compressor
The YUTAKI system is prepared for long lengths of hydraulic piping with a
pressure loss of up to 0,5 bar.
There is no indoor unit, which reduces installation costs (fewer pipes, etc).
No indoor unit
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benefits

Installation benefits:
1.4.3. Easy installation and maintenance
The use of electricity as the energy source instead of fossil fuels means a series of
benefits from the point of view of installation and subsequent maintenance.
−− High
efficiency
−− Compact
−− No
installation
1
accumulation tanks required for the energy source
Accumulator
tank
Conventional
boiler
1.4.4. Easy and flexible communication installation
Since the remote control is a radio-frequency device, it requires no connecting wire.
As for the AQ3000 Controller, only a non-polarity mains wire is required.
2. Design
features
¡¡ System Outlines (basic)

Hitachi

Room unit
RF receiver

System controller
NOTES
 For more information refer to
Installation guide of System
controller.

Outdoor
temperature sensor
 For more information refer to
controller (Section 3.2.
Mounting the sensors).
Radiator
Water
temperature
sensor
 For more information refer to
MMI pack.
Max. 65ºC
 For more information refer to
Low water
pressure
switch
user guide of Room unit.
 For more information refer
to installation guide of water
electric heater.


Water electric heater
(Option)
Max. 55ºC
Water circulation pump (Option)
Water inlet temperature sensor
Hitachi Air Conditioning Product Europe SA 2008
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and benefits
Main features
¡¡ System Outlines (combine with sanitary tank and hydraulic separator)
2. Design features
of the components


Hitachi
RF receiver

Room unit
System controller
NOTES
Hitachi
Outdoor
temperature
sensor
controller.
Sanitary
water
sensor
Back-up
heater

 For more information refer to
 For more information refer to
City water
controller (Section 3.2.
Mounting the sensors).
Radiator
Water
temperature
sensor
Max. 65ºC
 For more information refer to
Sanitary tank
unit (Option)
MMI pack.
Max. 55ºC
 For more information refer to
user guide of Room unit.
 For more information refer
to installation guide of water
electric heater.
Water circulation pump (Option)
Hydraulic
separator
(Option)
Low water
pressure
switch


Water electric
heater (Option)
3-WAY valve (Option)
Water inlet temperature sensor
Hitachi Air Conditioning Product Europe SA 2008
1.5.Main features of the components
The high energy efficiency and low noise level are the result of the combination of a highefficiency refrigerant circuit and components made with the latest-generation HITACHI
technology.
1.5.1. High-efficiency refrigerant circuit
HITACHI has developed a new and more efficient heat exchanger. The refrigerant
circuit also includes a superheating stage that increases the system’s efficiency even
further.
¡¡ New aluminum fins for the heat exchanger
The new aluminum fin heat exchanger allows less resistance to the air flow and loss
of pressure in the pipes.
Air flow resistance decreased by 20%.
The optimized slit shape minimizes noise
by reducing air intake resistance.
Pressure drop in heat exchanger pipe
has been decreased.
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benefits
A lower flow resistance provides more silent operation.
Main features
of the components
1
¡¡ Larger heat exchanger
The new and larger heat exchanger increases energy efficiency due to the greater
exchange surface.
New three-blade fan
1.5.2. Highly efficient scroll compressor exclusive to HITACHI
¡¡ The most relevant features of the scroll compressor in YUTAKI modules are:
−−
Optimum compressor shaft rotation system, which has two bearings located on the
ends of the shaft which allow for greater system reliability.
−−
New scroll coil which enables the overlap between the two scrolls to be optimized,
thus greatly reducing intake loss due to leakage.
−−
Oil return circuit design largely reduces heat loss.
−−
Improved lubrication system to provide more accurate oiling for the compressor.
¡¡ Compressor control by means of an inverter
Control by inverter provides a very fine control of the compressor which allows the
set temperature to be reached quickly and a stable operation to be maintained which
saves energy and reduces the noise level. This operation is possible because the
compressor operates continuously and self-adjusts itself depending on the system's
needs. This prevents the energy waste of conventional systems when stopping and
starting up when the set temperature is reached. Compressor breakages due to the
high number of stop-start sequences are also eliminated.
−−
Operation description (heating mode):
Compressor (rpm)
Water Temperature
(ºC)
High-efficiency compressor
Set temperature
YUTAKI
Machine with constant speed
Time
High power
operation
Energy saving
operation
Set-Free
Machine with constant speedS
YUTAKI
In existing machines with constant speed,
repeated turning on and off wastes energy.
Time
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and benefits
Main features
¡¡ High pressure shell
of the components
It acts as an oil separator reducing the amount of oil circulating in the refrigerant
system giving better heat exchanger efficiency.
Motor heat is not added to the suction gas before compression, which reduces
the discharge gas temperature. This is particularly important at low suction
temperatures. The discharge gas adequately cools the motor.
Refrigerant cannot enter the shell during the off cycle causing oil dilution and oil
foaming at start up.
Pressure
New system of regulating pressure, increasing the compressor's efficiency
and reliability in part load mode. This system ensures the work pressure of the
compressor is always at optimum level regardless of the charge, so that the
ratio between the discharge pressure (Pd) and the suction pressure (Ps) is
optimum as in the following diagram:
Overcompression zone
based on the new
pressure regulation system
Pd
Ps
Volume
¡¡ Lubrication
High-pressure shell compressor
Bearing in mind that lubrication is one of the most important factors in the
service life of a compressor, HITACHI has developed a system based on the
pressure differences between the suction and discharge using a secondary
pump at the base of the compressor. As a result, all of the compressor's moving
partsFEATURES
are lubricated evenly, ensuring high reliability in terms of its operating
MAIN
range, even at low frequencies.
Suction
Discharge
Asymmetric Scroll
Roller Bearing
Oil Return Pipe
Synchronous
motor
Sub-ball-bearing
structure
Trochoid oil pump
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benefits
Main features
¡¡ Protection against liquid return
When the compressor is stopped, the moving scroll rests on the casing. When
the compressor starts to run, the pressure in the chamber under the scroll builds
up through two bleed holes in the medium pressure section of the compression
stroke. This pressure then forces the scroll up against the housing and seals the
compression chamber. If liquid returns to the compressor, the resulting increase
in pressure
forces the Scroll
downwards breaking the seal and allowing the liquid
1. Comercial
information
to pass back into the compressor body where it will boil off due to the higher
MAIN FEATURES
temperature.
of the components
Suction inlet
Gas outlet
Fixed scroll
Moving scroll
Housing
Medium pressure
chamber
“Oldham ring”
Shaft
Oilway
¡¡ DC compressor with neodymium magnet
The use of a DC compressor improves the performance at around the 30-40 Hz
range, where the inverter compressor operates for most of the time. Additionally, to
suppress electromagnetic noise interference and achieve low noise, the rotor has
been divided into two parts and the electric pole displaced.
High efficiency motor (%)
DC motor
Rotor shape
optimized
AC motor
Reduction of
the typical
electromagnetic
noise of the DC
compressor.
Increased
efficiency in
the complete
range of rpms
used
Compressor rotor
rpm
“Scroll” technology
Neodymium
magnet
The Hitachi scroll compressor has been designed to provide maximum part load
performance, resulting in a lower operating cost by reducing the energy consumption
over the year.
¡¡ New stator coil design
The stator coils have been positioned to optimize the magnetic field, significantly
reducing heat losses and increasing the motor's efficiency at low speeds.
Compressor efficiency
New stator coil design
Efficiency
Current model
rpm
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1
Yutaki features
and benefits
Main features
1.5.3. Reduced noise level
of the components
HITACHI YUTAKI modules have been designed to reduce noise to a minimum.
A scroll compressor has been designed, with the following main technological
advances:
−−
Compression points evenly distributed along the compression stroke.
−−
Reduced number of components used
−−
Use of a high-pressure insulation shell
Optimized rotor shape
Electromagnetic
Noise
For the compressor motor, before
changing the rotor
Frequency (Hz)
Electromagnetic noise reduced
For the compressor motor, after
changing the rotor
Noise
Soundproofed compressor
Frequency (Hz)
¡¡ Direct current (DC) motors in the fans
To supplement the scroll compressor, the fan is also designed specifically to
reduce the noise level. Direct current motors have been used for this purpose.
These incorporate pulse width control that allows the fan motor start-stop
sequence to be controlled and adjusted.
DC motor
Motor efficiency (%)
Efficiency increased by 40%
(motor power consumption
halved).
120°
Electricity
30° 120° 60°
Time
AC motor
Current
120°
180°
180°
Voltage
Electricity
Time
Current
Voltage
180º RECTANGULAR WAVE PWM CONTROL
The combination of these two elements also reduces electromagnetic noise.
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Yuyaki features and
benefits
MAIN FEATURES
Startup benefits:
¡¡ New fan propeller
DC FAN
The new fan has three blades instead of four. It is designed to have a lower body
than traditional fans, and achieves surprising results, with a noise reduction of up
to 4dB (A).
Optimized distribution
at outlet angle
Optimized distribution
at inlet angle
Working conditions
Increased Angular Advance
New three-blade fan with
lower body
1
Pressure Efficiency
Increase of
efficiency
in all the
working
range (rpm)
Air volume
1.6. Start-up benefits
1.6.1. Easy start-up
¡¡ Selection switches
Start-up is via an intuitive configuration interface for the different system
parameters.
¡¡ Independent test run
Using a special configuration (see the Service Manual for more details), it
is possible to make a test run of the module, as well as of the water pump,
independently from the central control of the system. This selection allows
correct operation (installation and connection) of the module and the pump to be
checked, without having to connect and configure the rest of the system (central
control, remote control, RF Receiver, ACS Tank, etc).
¡¡ Alarm system
Yutaki modules are fully equipped with alarm systems that detect any
irregularities during start-up, permitting detection of any errors in assembly.
1.6.2. Service checking tool
The remote control has a liquid crystal screen that permits starting a
communication interface with the user. This enables the user to consult a range of
different information about the system status.
In case of abnormal operation, the same screen will show an alarm signal so that
a quick diagnosis can be made of the installation.
27
TCGB0044 rev 0 - 09/2008
Yutaki features
and benefits
Startup benefits:
1.7.Maintenance benefits
1.7.1. High reliability
¡¡ Minimizes maintenance
Faithful to Hitachi's usual philosophy, HITACHI's YUTAKI module has been designed
to guarantee great reliability and robustness in order to reduce maintenance
operations to a minimum.
1.7.2. Designed for easy maintenance
¡¡ Easy accessibility
All of the unit’s components can be accessed easily to undertake the necessary
operations. The entire system is designed to undertake the maintenance operations
in an easy and straightforward manner.
¡¡ Alarm codes for easy maintenance
These units use very precise alarm codes in order to rapidly locate any problem that
might occur.
The alarms are grouped by elements within the system in order to facilitate
maintenance work and optimize the fitter's job
1.8.Many options and accessories available
The YUTAKI system comes with a series of options and accessories to improve the
installation and make it more flexible depending on the user’s needs.
28
TCGB0044 rev 0 - 09/2008
General specifications
2.General data
Contents
2.
General data.............................................................................................................29
2.1. Air-to-water units................................................................................................................................... 30
2.1.1. General data.................................................................................................................................................... 30
2.2. Main component data............................................................................................................................ 31
2.2.1. Air side heat exchanger and fan....................................................................................................................... 31
2.2.2. Compressor...................................................................................................................................................... 31
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2
2.1.Air-to-water units
2.1.1. General data
Model
RHUE3AVHN
Electrical power supply
(Min/Nom/Max)
RHUE5AVHN
1~ 230V 50Hz
Conditions: Water Inlet/Outlet: 30/35ºC
 Outdoor temperature: (DB/WB): 7/6ºC
COP
(Min/Nom/Max)
Heating capacity
RHUE4AVHN
 RHUE5AHN
3N~ 400V 50Hz
kW
5.0/7.1/8.2
5.0/9.5/10.9
6.9/11.5/15.0
6.9/11.5/15.0
-
4.28
4.06
4.06
4.06
kW
5.0/7.1/8.1
5.0/9.2/10.2
6.8/11.4/14.0
6.8/11.4/14.0
-
3.17
3.05
3.01
3.01
kW
3.7/5.2/5.9
3.7/6.9/7.9
5.0/8.4/10.9
5.0/8.4/10.9
-
3.33
3.14
3.16
3.16
kW
3.8/5.3/6.1
3.8/6.9/7.7
5.2/8.6/10.5
5.2/8.6/10.5
-
2.52
2.43
2.41
2.41
dB(A)
dB(A)
48
64
49
65
51
67
51
67
155
160
Outdoor temperature: (DB/WB): 7/6ºC
COP
(Min/Nom/Max)
 Outdoor temperature: (DB/WB): -7/-8ºC
COP
(Min/Nom/Max)
 Outdoor temperature: (DB/WB): -7/-8ºC
COP
Sound pressure level
Sound power level
External dimensions
Net weight
Refrigerant
Refrigerant
Compressor
Height
Width
Depth
Quantity
Flow control
Type
Quantity
Power
Heat exchanger
1480
mm
mm
Kg
Kg
-
1250
444
150
150
R410A
2.60
2.60
2.90
Microprocessor controlled expansion valve
Nominal water flow
Maximum permisible water pressure
Water pipe connection
Pressure drop at heat exchanger
(conditions: ///)
Maximum electrical power consumption
Packaging dimensions
Color (Munsell code)
DC Inverter driven
kW
1
1
1
1.38
1.80
2.50
3.00
Multi-pass cross-finned tube
-
2
2
2
2
m3/min
85
95
100
100
W
m3/h
bar
-
70+70
1.37
70+70
1.92
70+70
2.40
70+70
2.40
kPa
31.1/30.4/16.5/17.6
10
Rp 1”
54.1/47.5/29.0/27.6
61.9/54.1/33.3/31.0
A
18.0
18.0
26.0
11.0
m3
0.97
0.97
0.97
0.97
-
 NOTE:
1. The nominal heating capacities are based on EN12055.
Hot water inlet/outlet temperature: 40/45ºC
Evaporator inlet air temperature: 6ºC
2. The sound pressure level is based on following
conditions:
1 meter from the frontal surface of the unit
1.5 meter from floor level
The above was measured in an anechoic chamber, so
reflected sound should be taken into consideration when
installing the unit.
30
2.90
1
-
Quantity
Air flow rate
Power
Fan
mm
TCGB0044 rev 0 - 09/2008
Natural Grey (1.0Y8.5/0.5)
3. The values of pressure drop at heat exchanger
correspond to the maximum capacity (maximum
compressor freqüency) of the unit.
2.2.Main component data
2.2.1. Air side heat exchanger and fan
Model
RHUE3AVHN
Air side heat exchanger
Heat Exchanger Type
RHUE4AVHN
RHUE5HVHN
RHUE5AHN
-
Multi-Pass Cross-Finned Tube
Material
-
Copper Piping
Outer Diameter
Ømm
7
7
7
7
Rows
-
2
2
3
3
Number of Tubes/Coil
-
132
132
198
198
Material
-
Pitch
mm
1.9
1.9
Maximum Operating Pressure
MPa
4.15
4.15
4.15
4.15
Total Face Area
m2
1.35
1.35
1.35
1.35
1
1
1
Piping
Fin
Number of Coils/Unit
Fan
Fan
Motor
Aluminum
1.9
-
1
1.9
Type
-
Multi-Blade centrifugal fan
Number/Unit
-
2
2
2
2
Outer Diameter
mm
544
544
544
544
Revolutions
rpm
413+505
465+568
483+591
483+591
Nominal air flow/unit
m3/min
85
95
100
100
Type
-
Starting Method
-
Power
W
Quantity
-
2
2
2
2
Insulation Class
-
E
E
E
E
Drip-Proof Enclosure
DC Control
70+70
70+70
70+70
70+70
2.2.2. Compressor
Model
Compressor type
EK306AHD-27A2
EK406AHD-36A2
EK405AHD-36D2
Hermetic scroll
Hermetic scroll
Hermetic scroll
Discharge
MPa
4.15
4.15
4.15
Suction
MPa
2.21
2.21
2.21
Starting method
-
Inverter-driven (I.D.)
Poles
-
4
4
4
Insulation class
-
E
E
E
Oil type
-
FVC68D
FVC68D
FVC68D
Oil quantity
L
1.2
1.2
1.2
Pressure
resistance
Motor type
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2
Dimensional data
3.Dimensional data
This chapter shows the dimensions and minimum space required to install YUTAKI units.
Contents
3. Dimensional data..........................................................................................................33
3.1. Dimensional drawing................................................................................................................................ 34
3.1.1. Dimensions...................................................................................................................................................... 34
3.1.2. Service space.................................................................................................................................................. 34
3.2. Structural drawing.................................................................................................................................... 35
33
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3
Dimensional data
3.1. Dimensional drawing
3.1.1. Dimensions
Item (unit) Operation
weight
(kg)
Modelo
Gravity center
position (mm)
a
b
h
Freqüency
(Hz)
RHUE3AVHN
152
705
223
645
55
RHUE4AVHN
152
705
223
645
55
RHUE5AVHN
157
695
228
660
58
RHUE5AHN
162
695
228
660
58
Units in: mm
No.
Description
Remarks
1
Water inlet
Rp1”
2
Water outlet
Rp1”
3
Air inlet
-
4
Air outlet
-
5
Holes for fixing unit
4-M10
6
Gravity center
-
3.1.2. Service space
No.
1
2
Description
Frontal Side
Waterpipe Side
Units in: mm
34
TCGB0044 rev 0 - 09/2008
Dimensional data
3.2. Structural drawing
3
No.
Description
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Compressor
Water Side Heat Exchanger
Air Side Heat Exchanger
Electrical Box
Fan
Check Valve
Electronic Expansion Valve
4-Way Valve
Accumulator
Liquid Tank
Solenoid Valve
High Pressure Switch
Water Inlet
Water Outlet
Low Pressure Sensor
High Pressure Sensor
Air Inlet
Air Outlet
35
TCGB0044 rev 0 - 09/2008
Remarks
x2
x2
x2
Rp1”
Rp1”
-
Capacities data
& Model selection
4.Capacities and selection data
This chapter is a guide for selecting the most suitable units for your requirements and shows you the performance details
of each unit YUTAKI
Contents
4. Capacities and selection data..................................................................37
4.1. Selection procedure for YUTAKI units..............................................................................38
4.1.1. Selection parameters............................................................................................................38
4.1.2. Selection procedure..............................................................................................................39
4.2. Maximum heating capacities............................................................................................46
4.3. Capacities and COP.........................................................................................................49
4.4. Correction factors.............................................................................................................50
4.4.1. Defrosting correction factor...................................................................................................50
4.4.2. Correction factor owing to use of glycol................................................................................51
4.5. Partial load performance..................................................................................................52
4.6. YUTAKI circulating pumps data........................................................................................54
4.7. Noise data........................................................................................................................55
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TCGB0044 rev 0 - 09/2008
4
Capacities data
& Model selection
4.1. Selection procedure for YUTAKI units
The following procedure gives an example of selection of YUTAKI units based on a series of previously defined
installation requirements: heating load required, operating temperatures and special characteristics on the installation
(energy system used, power source, etc.).
Before proceeding with the selection calculation, first establish the type of system to be designed: Monovalent, single
energy, or bivalent (serial, direct parallel or mixed parallel). The 3 main energy systems with their capacity-time charts
are shown below. For more information about the various energy systems, please refer to Chapter 7.
Monovalent system
(YUTAKI Unit)
90%
Heating
load
demanded:
(B)
10%
(C)
Point of
equilibrium
Capacity of
YUTAKI unit
(A)
90%
(B)
Heating load
demanded:
Required heating
(A)
Bivalent system
(YUTAKI Unit + boiler)
Coldest day of the year
Point of
equilibrium
Required heating
Capacity
of YUTAKI
unit
Required heating
Single-energy system
(YUTAKI Unit + electric heater)
(A)
10%
(C)
90%
Hours
Hours
Capacity of
YUTAKI unit
Heating load
demanded:
(B)
Hours
NOTE:
(A) Excess capacity on the YUTAKI unit
(B) Capacity covered by the YUTAKI unit
(C) Capacity covered by the electric heater
(D) Capacity covered by the boiler
The example given in this chapter is based on a single-energy system, allowing for an auxiliary electrical heater
to be used (auxiliary unit available to cover temporary heating requirements on the coldest days of the year).
In installations which already have a conventional boiler (gas/oil), this can be kept for the same use and a bi-valent system
installed (in series or parallel) which will help to increase the overall performance of the whole installation significantly.
In any case, the calculation example can be applied to all the energy systems mentioned.
4.1.1. Selection parameters
To calculate the YUTAKI units, it will be necessary to consult and/or use a series of parameters shown in tables and
graphics presented in the different chapters of this catalogue. A summarized list is shown below:
38
−−
−−
−−
−−
General information: Chapter 2.
−−
Maximum heating capacities:
Section 4.2.
Operation space possibilities: Chapter 3.
Operating range: Chapter 5.
Different possible energy systems:
Chapter 7.
TCGB0044 rev 0 - 09/2008
−−
−−
−−
−−
Different correction factors, see:
Section 4.4.
Partial load performance: Section 4.5.
Circulating pump operating curves:
Section 4.6.
Noise data for the different units:
Section 4.7.
Capacities data
& Model selection
4.1.2. Selection procedure
The selection procedure given in this chapter is a simple example structured into three
main blocks:
First, a) once the energy system to be used has been chosen (single-energy), a YUTAKI
unit is selected depending on the normal heating load. Next, b) a check is made to ensure
that the combination (YUTAKI + electric heater) covers the temporary needs of the coldest
days of the year. The calculation will be completed by c) selecting a circulation pump for
the system’s water (water pump available as an accessory).
a) Selection for a regular heating load
Step 1:
Initial pre-selection
Proposed energy system
Monoenergetic
Regular ambient temperature WB/DB
(HR = 85%)
-5/-4 °C
Required regular heating load
9.5 kW
Ambient temperature WB/DB on the coldest
day of the year (HR = 85%)
Heating load required on the coldest day of
the year
-15 / -14.5 ºC
13.5 kW
Inlet/outlet water temperature
40 / 45 ºC
Power supply
1~230 V, 50 Hz
Type of glycol to use
Ethylene
P
PDC
Pressure loss on the client’s hydraulic
installation (PDC)
Q
Required heating
13.5 kW, -15 ºC WB
9.5 kW, -5 ºC WB
Capacity of
YUTAKI unit
Heating load
demanded:
Hours
These conditions will determine the entry in the capacity table (section 4.2), where we
can identify which unit has heating capacity to cover the normal heating load required by
the installation (9.5 kW for an inlet/outlet water temperature of 40/45 ºC and an ambient
temperature of -5ºC WB).
YUTAKI Unit
Table 1:
Maximum heating
capacity table

Maximum heating
capacity (kW)
RHUE3AVHN
6.5
RHUE4AVHN
8.2
RHUE5AVHN
11.3
As can be seen in the table, the YUTAKI unit that covers the installation’s heating
requirements is the RHUE5AVHN. Therefore, this will be the pre-selected unit.
NOTE:
When working with the temperature of an outdoor air inlet with a value not included in the capacities
table of section 4.2. (for example, -3 ºC), an interpolation will be needed, using the values above and
below the ambient temperature
39
TCGB0044 rev 0 - 09/2008
4
Capacities data
& Model selection
Step 2:
Heating capacity correction for defrost and/or use of glycol
The actual heating capacity of the pre-selected unit must be calculated applying the
necessary correction factors:
Qh= QMh x fd x fgh
Qh: Actual heating capacity (kW)
QMh: Maximum cooling capacity (kW)
fd: Defrosting correction factor
fgh: Capacity correction factor owing to use of glycol
The maximum heating capacity (QMh)of the RHUE5AVHN unit is 11.3 kW.
Calculation of fd:
In situations where the ambient temperature is lower than 7 ºC DB, frost may build up
on the heat exchanger. In the case, the heating capacity for the unit may be reduced
because of the time spent by the unit in removing the build-up.
The defrosting correction factor takes this time into account and applies the
heatingcapacity correction.
To calculate the correction factor, please see section 4.4.1 which shows a table with
different values of fddepending on the ambient temperature (ºC DB). If the correction factor
at an ambient temperature of -4 ºC DB does not appear on the table, an interpolation will be
needed.
Finally, the resulting defrosting correction factor is 0.905.
Calculation offgh:
When the ambient temperature is low in winter, the unit may be damaged by freezing
water in the pipes during shutdown periods. To prevent this, use a mixture with glycol
anti-freeze.
On the other hand, the percentage of glycol used may affect the heating capacity of
the unit.
To calculate the capacity correction factor due to the use of glycol, please see section
4.4.2., bearing in mind the type of glycol to be used. This example uses ethylene.
The ambient temperature value of -4 ºC DB does not appear in the table. Therefore,
the percentage of ethylene glycol to use will correspond to the ambient temperature
immediately below in the table. In this case, it is -7 ºC.
At this ambient temperature, the percentage of ethylene glycol necessary is 20%, for
which there is a corresponding capacity correction factor, owing to the use of ethylene
glycol, of 1.
Calculation of Qh:
Once the correction factors to be applied have been determined, the formula for actual
heating capacity of the unit RHUE5AVHN can be applied:
Qh= 11.3 kW x 0.905 x 1 = 10.23 kW
As can be seen, the actual heating capacity of the RHUE5AVHN unit (10.23 kW)
is greater than the heating load required by the installation (9.5 kW). Therefore,
the pre-selection of this unit will be considered valid.
NOTE:
If the actual heating capacity calculated is less than that provided by the pre-selected unit, the
calculation must be done again with the unit immediately above. If there is no unit higher than the preselected one, some other system, or the regular use of an electrical heater, will have to be considered.
40
TCGB0044 rev 0 - 09/2008
Capacities data
& Model selection
b) Selection for the coldest days of the year (use of the auxiliary electric heater)
The previous calculation shows that the RHUE5AVHN unit provides a heating capacity of
10.23 kW (-5 ºC WB), which is greater than the regular heating load necessary of 9.5 kW, but
does not reach the peak heating load of 13.5 kW (-15 ºC WB) necessary on the coldest days
of the year. The auxiliary electric heater is used in these cases.
Step 1:
The aim of this section is to check that the energy system chosen (combination of the
YUTAKI unit + auxiliary electric heater) covers the temporary heating requirements for
the coldest days of the year.
Initial pre-selection
As the ambient temperature has fallen to -15 ºC, the capacities table has to be consulted
again (section 4.2) to decide the maximum heating capacity the RHUE5AVHN unit will
provide for these new conditions.
The maximum heating capacity for an ambient temperature of -15 ºC WB and a water
inlet/outlet temperature of 40/45 ºC is 9.2 kW
Step 2:
Correction of the heating capacity for defrost and/or use of glycol
The actual heating capacity for the unit selected for the coldest days of the year is
calculated by applying correction factors for defrosting and glycol, following the method
used above.
Qh= QMh x fd x fgh
QMh: Maximum cooling capacity (kW)
fd: Defrosting correction factor
fgh: Capacity correction factor owing to use of glycol
Calculation of fd:
The tables in section 4.4.1 show that the correction factor for an ambient temperature
of-14.5 ºC DB does not appear on the table. However, for the temperature values
immediately above and below there is the same defrosting correction factor of 0.95.
Therefore, this will be the defrosting correction factor obtained.
Calculation offgh:
The tables in section 4.4.2. show that the ambient temperature value of -14.5 ºC DB
does not appear in the table. Therefore, the percentage of ethylene glycol to use will
correspond to the ambient temperature immediately below in the table. In this case,
it is -22 ºC.
At this ambient temperature, the percentage of ethylene glycol necessary is 40%, for
which there is a corresponding capacity correction factor, owing to the use of ethylene
glycol, of 0.99.
Calculation of Qh:
Once the correction factors to be applied have been determined the formula for actual
heating capacity of the unit RHUE5AVHN can be applied:
Qh= 9.2 kW x 0.95 x 0.99 = 8.65 kW
41
TCGB0044 rev 0 - 09/2008
4
Capacities data
& Model selection
Step 3:
Calculation for the heating capacity of the combination
(YUTAKI unit + electric heater)
The estimated required heating load for the coldest days of the year is 13.5 kW.
After applying the relative actual heating capacity correction factors provided by the
RHUE5AVHN unit is for the coldest days.
In such cases, the electric heater provides the heating load required to cover temporary
heating needs.
The electric heater offered by HITACHI as an accessory provides a power of 6 kW
which must be added to the heating capacity provided by the pre-selected unit.
The result is:
Qh= 8.65 kW + 6 kW = 14.65 kW
The heating capacity resulting from the combination (YUTAKI unit + electric heater) is
higher than the heating demand of 13.5 kW estimated in this example for the coldest
days of the year, so that pre-selection of the RHUE5AVHN unit can be taken as valid.
This means that the energy system will be as follows:
Required
heating
14.65 kW, -15 ºC WB
10.23 kW, -5 ºC WB
8.65 kW, -15 ºC WB
Capacity of the
RHUE5AVHN unit
Heating load
demanded:
Hours
42
TCGB0044 rev 0 - 09/2008
Capacities data
& Model selection
c) Selecting the circulating water pump
To enable the designer to select the most suitable water circulating pump for each
installation. YUTAKI units do not have the water circulating pump as standard equipment.
However, HITACHI offers the client two pump models to be selected as an accessory.
The sizing method is equivalent in all cases.
NOTE:
For this example, bear in mind the results from example a) Selection of YUTAKI units for a regular
heating load, as they are the results that demand a greater heating load and, therefore, a greater
flow from the circulating pump.
Step 1:
Calculation of the flow rate necessary for the circulation pump
First, calculate the flow needed on the pump to provide a heating capacity of 10.23 kW
and obtain an increase in the water temperature of 40 to 45 ºC.
To do this, use the formula given below, where the flow required to increase the
difference in temperature between the water inlet and outlet is calculated, depending
on the heating capacity needed.
CFR=
Qh x fgf x 860
1000 x (TS- TE)
CFR: Calculated flow rate (m3/h)
fgf: Flow rate correction factor owing to use of glycol
(TS - TE): Difference in temperature between water inlet/outlet (°C)
Calculation of fgf:
Once the actual heating capacity of the RHUE5AVHN and the difference between
the water inlet and outlet temperatures are known, the value required to calculate the
pump flow rate is the flow correction factor due to the use of glycol fgf.
The use of glycol affects the actual heating capacity, since the density of glycol is higher
than that of water. Therefore, a higher flow rate is necessary for the same conditions.
To calculate the flow rate correction factor due to the use of glycol, please see the
table in section 4.4.2., bearing in mind the type of glycol used.
Following the same method used to obtain the capacity correction factor due to the
use of glycol, a flow rate correction factor is obtained due to the use of ethylene glycol
of 1.01.
Calculation of CFR:
Once the flow correction factor due to the use of glycol has been obtained, the previous
formula can be applied:
CFR=
Qh x fgf x 860
1000 x (TS- TE)
=
10.23 kW x 1.01 x 860
1000 x (45-40)
Finally, a flow rate value is obtained of 1.78 m3/h.
43
TCGB0044 rev 0 - 09/2008
= 1.78 m3/h
4
Capacities data
& Model selection
Step 2:
Checking the working limits of the flow on the water circulating pump
Once the flow needed for the pump has been decided, check that it falls between the
working limits for the heat exchanger on the unit.
To do this, refer to Chapter 5, where the maximum and minimum flow for each YUTAKI
unit can be found.
As can be seen, the necessary flow-rate value calculated for the circulating pump falls
within the operating limits of the selected unit RHUE5AVHN. Therefore, this value will
be accepted.
0.8 m3/h < CFR = 1.78 m3/h < 4.0 m3/h
Step 3:
Calculation of the necessary pressure to be provided by the circulating pump
The selected circulating pump must be able to provide the pressure required to
overcome the pressure loss in the client’s hydraulic unit, as well as those on the
unit itself, working with the flow calculated previously.
Section 4.6 shows the operating details of the various YUTAKI units (operation of
circulating pumps, including heat exchanger pressure losses). Once it is known that
the operating data for the 2 pump models include pressure losses from the unit itself,
the data needed are the pressure losses from the client’s hydraulic unit.
For this example, pressure losses from the installation have been estimated as shown
below, and are given by the following formula:
P = K x Q2
P = Loss of pressure on the client's hydraulic installation (mH2O)
Q = Circulating water pump flow rate (m3/h)
K = Coefficient depending on the characteristics of the hydraulic
Water flow rate
(m3/h)
Loss of pressure
on the client's
hydraulic
installation
(mH2O)
0.5
0.2
1
0.8
1.5
1.8
2
3.2
2.5
5
3
7.2
3.2
8.2
Loss of pressure (mH2O)
installation (diameter and length of pipes, roughness, etc.). This example
assumes K = 0.8.
Water Flow (m³/h)
Necessary pressure for the circulating pump Qh:
At a flow rate of 1.78 m3/h the pressure loss form the client's hydraulic installation will
be the following:
P = 0.8 x 1.782 = 2.53 mH2O
Therefore, the selected pump must provide a pressure higher than 2.53 mH2O at a flow
rate of 1.78 m³/h.
44
TCGB0044 rev 0 - 09/2008
Capacities data
& Model selection
Step 4:
Selecting the circulating water pump
The next step is to select a water pump from the YUTAKI range that is capable of
providing a pressure of 2.53 mH2O for a flow rate of 1.78 m3/h.
See section 4.6 to select the pump which is most suitable for the RHUE5AVHN unit.
Below, the pressure loss curve on the client's hydraulic installation is situated on the same
chart as the operating curves for the RHUE5AVHN unit (operating curves for the circulating
pumps with pressure loss in the heat exchanger included, shown in section 4.6).
B2, V1
B2, V2
NOTE:
V: Pump motor speed
- V1: High
- V2: Medium
- V3: Low
PDC: Pressure loss in
the client’s hydraulic
installation
B2, V3
Pressure provided (mH2O)
B(1,2): Circulating water
pump
PDC
B1, V1
B1, V2
4
B1, V3
2.53 mH2O
1.78 m3/h
Water Flow (m³/h)
The chart shows that the calculated working point falls between 2 possible pump
1 speed configurations, so this will be the selected pump. Its working speed V1 or V2
must be chosen, assuming that the actual working flow rate will be higher or lower
than the theoretical calculation.
The client must choose the working speed for the pump selected. Graphics for the 2
configurations possible for this selection example are shown below.
B2, V1
B2, V2
B2, V3
PDC
B1, V1
B1, V2
B1, V3
2.9 mH2O
2.4 mH2O
1.7 m3/h
1.9 m3/h
Water Flow (m³/h)
The approximate operating point for the 2 possible configurations is:
- Pump (B1, V1): Pressure of 2.9 mH2O for a flow rate of 1.9 m3/h
- Pump (B1, V2): Pressure of 2.4 mH2O for a flow rate of 1.7 m3/h
45
TCGB0044 rev 0 - 09/2008
Capacities data
& Model selection
4.2. Maximum heating capacities
Ambient
Temperature
(ºC WB)
Model
Water outlet
temperature
(°C)
-20
-15
-10
-7
-5
0
RHUE3AVHN
5
6
10
15
20
46
TCGB0044 rev 0 - 09/2008
35
40
45
50
35
40
45
50
35
40
45
50
55
35
40
45
50
55
35
40
45
50
55
35
40
45
50
55
35
40
45
50
55
45
35
40
45
50
55
25
30
35
40
45
50
55
20
25
30
35
40
45
50
55
Maximum
heating
capacity
(kW)
4.4
4.6
4.8
4.9
5.0
5.2
5.4
5.3
5.6
5.7
5.8
5.7
5.7
6.1
6.2
6.2
6.1
6.0
6.4
6.5
6.5
6.4
6.2
7.2
7.2
7.2
7.0
6.8
8.0
8.0
8.0
7.7
7.4
8.1
8.8
8.7
8.7
8.3
8.0
10.4
10.0
9.6
9.5
9.4
9.0
8.6
11.7
11.3
10.8
10.4
10.3
10.1
9.6
9.2
Water flow rate
(m3/h)
Pressure loss
(kPa)
0.76
0.79
0.83
0.84
0.86
0.89
0.93
0.91
0.96
0.98
1.00
0.98
0.98
1.05
1.07
1.07
1.05
1.03
1.10
1.12
1.12
1.10
1.07
1.24
1.24
1.24
1.20
1.17
1.38
1.38
1.38
1.32
1.27
1.39
1.51
1.50
1.50
1.43
1.38
1.79
1.72
1.65
1.63
1.62
1.55
1.48
2.01
1.94
1.86
1.79
1.77
1.74
1.65
1.58
9.3
10.2
11.0
11.5
11.9
12.9
13.9
13.4
14.9
15.4
15.9
15.4
15.4
17.6
18.1
18.1
17.6
17.0
19.3
19.9
19.9
19.3
18.1
24.2
24.2
24.2
22.9
21.7
29.7
29.7
29.7
27.6
25.5
30.4
35.7
34.9
34.9
31.9
29.7
49.4
45.8
42.3
41.4
40.6
37.3
34.2
62.0
58.0
53.1
49.4
48.4
46.6
42.3
38.9
Capacities data
& Model selection
Ambient
Temperature
(ºC WB)
Model
Water outlet
temperature
(°C)
-20
-15
-10
-7
-5
0
RHUE4AVHN
5
6
10
15
20
47
TCGB0044 rev 0 - 09/2008
35
40
45
50
35
40
45
50
35
40
45
50
55
35
40
45
50
55
35
40
45
50
55
35
40
45
50
55
35
40
45
50
55
45
35
40
45
50
55
25
30
35
40
45
50
55
20
25
30
35
40
45
50
55
Maximum
heating
capacity
(kW)
5.9
6.0
6.1
6.2
6.8
6.7
6.7
6.7
7.5
7.4
7.3
7.2
7.1
8.1
8.0
7.9
7.7
7.6
8.6
8.4
8.2
8.0
7.9
9.6
9.4
9.1
8.9
8.6
10.7
10.4
10.0
9.7
9.3
10.2
11.8
11.3
10.9
10.5
10.1
13.9
13.4
12.8
12.3
11.8
11.3
10.8
15.7
15.1
14.5
13.9
13.3
12.7
12.1
11.5
Water flow rate Pressure loss
(m3/h)
(kPa)
1.01
1.03
1.05
1.07
1.17
1.15
1.15
1.15
1.29
1.27
1.26
1.24
1.22
1.39
1.38
1.36
1.32
1.31
1.48
1.44
1.41
1.38
1.36
1.65
1.62
1.57
1.53
1.48
1.84
1.79
1.72
1.67
1.60
1.75
2.03
1.94
1.87
1.81
1.74
2.39
2.30
2.20
2.12
2.03
1.94
1.86
2.70
2.60
2.49
2.39
2.29
2.18
2.08
1.98
16.5
17.0
17.6
18.1
21.7
21.1
21.1
21.1
26.2
25.5
24.9
24.2
23.6
30.4
29.7
29.0
27.6
26.9
34.2
32.6
31.1
29.7
29.0
42.3
40.6
38.1
36.5
34.2
52.2
49.4
45.8
43.1
39.7
47.5
63.0
58.0
54.1
50.3
46.6
86.6
80.7
73.8
68.3
63.0
58.0
53.1
109.6
101.7
94.0
86.6
79.5
72.7
66.2
60.0
4
Capacities data
& Model selection
Ambient
Temperature
(ºC WB)
Model
Water outlet
temperature
(°C)
-20
-15
-10
-7
-5
0
RHUE5A(V)HN
5
6
10
15
20
48
TCGB0044 rev 0 - 09/2008
35
40
45
50
35
40
45
50
35
40
45
50
55
35
40
45
50
55
35
40
45
50
55
35
40
45
50
55
35
40
45
50
55
45
35
40
45
50
55
25
30
35
40
45
50
55
20
25
30
35
40
45
50
55
Maximum
heating
capacity
(kW)
8.1
8.2
8.3
8.4
9.3
9.3
9.2
9.2
10.3
10.2
10.0
9.9
9.8
11.2
11.0
10.8
10.6
10.4
11.8
11.5
11.3
11.0
10.8
13.2
12.9
12.5
12.1
11.8
14.7
14.2
13.7
13.3
12.8
14.0
16.2
15.6
15.0
14.4
13.8
19.0
18.3
17.6
16.9
16.2
15.5
14.8
21.6
20.7
19.9
19.1
18.3
17.4
16.6
15.8
Water flow rate Pressure loss
(m3/h)
(kPa)
1.39
1.41
1.43
1.44
1.60
1.60
1.58
1.58
1.77
1.75
1.72
1.70
1.69
1.93
1.89
1.86
1.82
1.79
2.03
1.98
1.94
1.89
1.86
2.27
2.22
2.15
2.08
2.03
2.53
2.44
2.36
2.29
2.20
2.41
2.79
2.68
2.58
2.48
2.37
3.27
3.15
3.03
2.91
2.79
2.67
2.55
3.72
3.56
3.42
3.29
3.15
2.99
2.86
2.72
18.7
19.2
19.7
20.1
24.5
24.5
24.0
24.0
29.9
29.3
28.2
27.7
27.1
35.1
33.9
32.7
31.6
30.4
38.9
37.0
35.7
33.9
32.7
48.3
46.2
43.5
40.8
38.9
59.5
55.6
51.9
49.0
45.5
54.1
71.8
66.8
61.9
57.2
52.6
97.8
91.0
84.4
78.0
71.8
65.9
60.3
125.4
115.5
107.0
98.8
91.0
82.5
75.3
68.4
Capacities data
& Model selection
4.3. Capacities and COP
Inlet/outlet water temperature: 30/35 ºC
Ambient temperature DB/WB: 7 / 6 ºC
Capacity
(kW)
Input Power
(kW)
COP
Performance
7.1
1.66
4.28
A
RHUE4AVHN
9.5
2.34
4.06
A
RHUE5AVHN
11.5
2.83
4.06
A
RHUE5AHN
11.5
2.83
4.06
A
Yutaki Unit
RHUE3AVHN
Capacity
(kW)
Input Power
(kW)
COP
Performance
RHUE3AVHN
7.1
2.24
3.17
B
RHUE4AVHN
9.2
3.02
3.05
B
RHUE5AVHN
11.4
3.79
3.01
B
RHUE5AHN
11.4
3.79
3.01
B
Yutaki Unit
Ambient temperature DB/WB: -7 / -8 ºC
Capacity
(kW)
Input Power
(kW)
COP
RHUE3AVHN
5.2
1.56
3.33
RHUE4AVHN
6.9
2.20
3.14
RHUE5AVHN
8.4
2.66
3.16
RHUE5AHN
8.4
2.66
3.16
Yutaki Unit
Ambient temperature DB/WB: -7 / -8 ºC
Capacity
(kW)
Input Power
(kW)
COP
RHUE3AVHN
5.3
2.10
2.52
RHUE4AVHN
6.9
2.84
2.43
RHUE5AVHN
8.6
3.57
2.41
RHUE5AHN
8.6
3.57
2.41
Yutaki Unit
¡¡Classification of performance depending on the operating conditions of the unit
Performance
class
Inlet/outlet water
temperature: 30 / 35 ºC
Inlet/outlet water
temperature: 40 / 45 ºC
A
4.05<COP
3.20<COP
B
4.05≥COP>3.90
3.20≥COP>3.00
C
3.90≥COP>3.75
3.00≥COP>2.80
D
3.75≥COP>3.60
2.80≥COP>2.60
E
3.60≥COP>3.45
2.60≥COP>2.40
F
3.45≥COP>3.30
2.40≥COP>2.20
G
3.30≥COP
2.20≥COP
49
TCGB0044 rev 0 - 09/2008
4
Capacities data
& Model selection
4.4. Correction factors
4.4.1. Defrosting correction factor
The heating capacity does not include operation during frost or defrosting.
When this type of operation is taken in account, the heating capacity must be corrected according to the following
equation.
Corrected Heating Capacity =
defrost correction factor x heating Capacity
Ambient temperature (ºC DB)
(HR = 85%)
Defrosting correction factor fd
-20
-7
-5
-3
0
3
5
7
0.95
0.95
0.93
0.88
0.85
0.87
0.90
1.0
NOTE:
The correction factor is not valid for special
conditions such as during snow or operation in
a transitional period.
Heating
capacity
Reduced
capacity due to
frost build-up
Time
Max. defrost 12 min.
1 cycle
50
TCGB0044 rev 0 - 09/2008
Capacities data
& Model selection
4.4.2. Correction factor owing to use of glycol
¡¡ Application at low ambient temperature
When the ambient temperature is low in winter, the water in the pipes and circulating pump may freeze and
damage the pipes and water pumps in shutdown periods.
To prevent this, it is useful to drain the water from the installation or not to interrupt installation power supply, as
an electrical cable can prevent the water from freezing in the circuit.
In addition, in cases where it is difficult to drain the water, it is a good idea to use a mixture with glycol antifreeze (ethylene or propylene between 10% and 40%).
Unit performance when operating with glycol may be reduced, depending on the percentage of glycol used,
because glycol is denser than water.
Two tables are given below (one for ethylene glycol and the other for propylene glycol) showing the percentage
of ethylene glycol recommended for the various values for the outside air inlet temperature, with their respective
correction factors.
Corrected heating capacity =
capacity correction factor owing to use of glycol x
heating capacity
4
−− Ethylene glycol
Ambient Temperature
DB (°C)
-3
-7
-13
-22
Percentage of glycol required
%
10
20
30
40
Capacity correction factor
fgh
1.00
1.00
0.99
0.99
Consumed power correction factor
fgi
1.01
1.02
1.03
1.04
Flow rate correction factor
fgc
1.01
1.01
1.02
1.04
Pressure loss correction factor
fgp
1.03
1.09
1.16
1.26
DB (°C)
-3
-7
-13
-22
Percentage of glycol required
%
10
20
30
40
Capacity correction factor
fgh
1.00
1.00
0.99
0.99
Consumed power correction factor
fgi
1.01
1.02
1.03
1.04
Flow rate correction factor
fgc
1.02
1.02
1.04
1.07
Pressure loss correction factor
fgp
1.24
1.31
1.39
1.51
−− Propylene glycol
Ambient Temperature
51
TCGB0044 rev 0 - 09/2008
Capacities data
& Model selection
4.5. Partial load performance
¡¡Water Outlet Temperature: 45 ºC
RHUE3AVHN
Ambient
Temperature
(ºC WB)
Capacity
20
10
6 0 -10
-20
Compressor Load
Performance
67 ~ 100%
%
77
80
90
100
110
120
125
Consumed power
%
58
72
78
85
93
102
106
COP
%
133
111
115
118
118
118
118
Capacity
%
70
80
90
100
107
65
Consumed power
%
67
70
78
85
94
102
COP
%
97
100
103
106
106
105
Capacity
%
62
70
80
90
100
Consumed power
%
66
72
80
89
100
COP
%
94
97
100
101
100
Capacity
%
60
70
80
89
56
Consumed power
%
64
68
77
87
97
COP
%
88
88
91
92
92
Capacity
%
44
50
60
70
72
Consumed power
%
61
67
78
91
93
77
77
COP
%
Capacity
%
37
72
75
77
40
50
59
Consumed power
%
58
62
75
89
COP
%
64
65
67
66
: Standard conditions (Ambient: 7 ºC (DB)/6 ºC (WB), water inlet/outlet: 40/45 ºC, máx. Hz)
Standard conditions
52
Heating
capacity (kW)
Consumed
power (kW)
COP
8.1
2.58
3.14
TCGB0044 rev 0 - 09/2008
Capacities data
& Model selection
RHUE4AVHN, RHUE5A(V)HN
Ambient
Temperature
(ºC WB)
20
10
6 0 -10
-20
Compressor Load
Performance
51 ~ 100%
Capacity
%
61
Consumed power
%
52
57
64
71
COP
%
117
123
125
127
Capacity
%
52
60
70
80
90
100
107
Consumed power
%
49
55
63
71
82
94
102
COP
%
106
109
111
113
110
106
105
Capacity
%
50
60
70
80
90
100
Consumed power
%
49
50
57
65
75
87
100
COP
%
100
100
105
108
107
103
100
Capacity
%
44
50
60
70
80
89
Consumed power
%
47
53
61
72
84
97
COP
%
94
94
98
97
95
92
Capacity
%
35
40
50
60
70
71
Consumed power
%
45
50
60
73
91
93
COP
%
78
80
83
82
77
76
Capacity
%
29
30
40
50
59
Consumed power
%
43
44
56
71
89
COP
%
67
68
71
70
66
49
70
80
90
100
110
120
124
79
90
101
106
127
122
119
117
: Standard conditions (Ambient: 7 ºC (DB)/6 ºC (WB), water inlet/outlet: 40/45 ºC, máx. Hz)
Assembly
53
Standard conditions
Heating
capacity (kW)
Consumed
power (kW)
COP
RHUE4AVHN
10.2
3.47
2.94
RHUE5AVHN
14.0
4.95
2.83
TCGB0044 rev 0 - 09/2008
4
Capacities data
& Model selection
4.6. YUTAKI circulating pumps data
As described in the selection process for the YUTAKI module (section 4.1.), HITACHI makes two circulating pump models
available for clients to select as accessories.
The characteristics of YUTAKI units (Pump – Heat Exchanger) are given in tables below, with their respective operating
curves:
¡¡RHUE3AVHN, RHUE4AVHN
Pump
motor
speed
Hi
Circulating
water pump
flow rate (m3/h)
Med
Low
Pump 2:
Pressure provided
(mH2O)
Hi
Med
Low
0.5
6.4
5.7
3.8
10.8
10.4
9.2
1
5.1
4.2
2.0
9.4
8.9
7.5
1.5
3.0
1.9
-
7.3
6.7
4.9
1.8
1.5
-
-
5.7
5.0
2.9
2
-
-
-
4.5
3.7
-
2.4
-
-
-
1.8
-
-
B2, V1
B2, V2
Pump 1:
Pressure provided
(mH2O)
B2, V3
B1, V1
B1, V2
B1, V3
Circulating water pump flow rate (m3/h)
¡¡RHUE5A(V)HN
Pump
motor
speed
Hi
Circulating
water pump
flow rate (m3/h)
0.5
Med
6.5
5.8
Low
Pump 2:
Pressure provided
(mH2O)
Hi
3.9
10.9
Med
10.5
Low
9.3
1
5.7
4.8
2.6
10.0
9.5
8.1
1.5
4.4
3.2
0.7
8.6
8.0
6.2
2
2.6
1.1
-
6.8
6.0
3.8
2.5
0.3
-
-
4.6
3.6
0.8
3
-
-
-
1.7
0.7
-
3.2
-
-
-
0.4
-
-
B2, V1
B2, V2
Pump 1:
Pressure provided
(mH2O)
B2, V3
B1, V1
B1, V2
B1, V3
Circulating water pump flow rate (m3/h)
NOTE:
B(1.2): Circulating water pump
V: Pump motor speed (V1: High, V2: Medium, V3: Low)
54
TCGB0044 rev 0 - 09/2008
Capacities data
& Model selection
4.7. Noise data
This section shows details of noise on the various Yutaki units for 2 different noise conditions, with the corresponding graphics:
is
YUTAKI
Unit
Heat
exchanger
1.5 m
Fans
¡¡Condition 1: (a = 1 m)
Sound pressure level (dB)
Frequency band (Hz)
Global
(dB(A))
63
125
250
500
1000
2000
4000
8000
RHUE3AVHN
54.5
47.5
46.5
45.5
43
41
32
34
48
RHUE4AVHN
55.5
48.5
47.5
46.5
44
42
33
35
49
RHUE5AVHN
57.5
50.5
49.5
48.5
46
44
35
37
51
RHUE5AHN
57.5
50.5
49.5
48.5
46
44
35
37
51
¡¡Condition 2: (a = 10 m)
Sound pressure level (dB)
Frequency band (Hz)
Global
(dB(A))
63
125
250
500
1000
2000
4000
8000
RHUE3AVHN
42.5
35.5
34.5
33.5
31
29
20
22
36
RHUE4AVHN
43.5
36.5
35.5
34.5
32
30
21
23
37
RHUE5AVHN
45.5
38.5
37.5
36.5
34
32
23
25
39
RHUE5AHN
45.5
38.5
37.5
36.5
34
32
23
25
39
NOTES:
1. dB(A) = Weighting "A" of acoustic power (scale A in accordance with IEC).
2. If the noise is measured under actual conditions of the installation, the values measured will be higher because of background
noise and reflected sound.
55
TCGB0044 rev 0 - 09/2008
4
Capacities data
& Model selection
Model: RHUE4AVHN
Measurement point:
Power supply: 230 V 50 Hz
1.5 metres from floor level
1 meter from the unit's front surface.
Sound criteria curve
Nominal: 49 dB(A)
Octave sound pressure (dB (C))
1 meter from the unit's front surface.
Nominal: 48 dB(A)
Model: RHUE3AVHN
Measurement point:
Approximate
continuous noise
detection threshold
Approximate
continuous noise
detection threshold
Frequency (Hz)
Model: RHUE5AVHN
Model: RHUE5AHN
Measurement point:
1 meter from the front surface of the unit.
Nominal: 51 dB(A)
Nominal: 51 dB(A)
1.5metres from floor level
1 m from the front surface of the unit.
Acoustic criteria curve
Measurement point:
Frequency (Hz)
Approximate
continuous noise
detection threshold
Approximate
continuous noise
detection threshold
Frequency (Hz)
56
TCGB0044 rev 0 - 09/2008
Frequency (Hz)
Capacities data
& Model selection
Model: RHUE4AVHN
Measurement point:
10 meters from the front surface of the unit.
Nominal: 37 dB(A)
Model: RHUE3AVHN
Measurement point:
Nominal: 36 dB(A)
4
Approximate
continuous noise
detection threshold
Approximate
continuous noise
detection threshold
Frequency (Hz)
Model: RHUE5AVHN
Frequency (Hz)
Model: RHUE5AHN
Nominal: 39 dB(A)
Nominal: 39 dB(A)
Measurement point:
Measurement point:
10 meters from the front surface of the unit
Acoustic criteria curve
Approximate
continuous noise
detection threshold
Approximate
continuous noise
detection threshold
Frequency (Hz)
57
TCGB0044 rev 0 - 09/2008
Frequency (Hz)
Working range
5. W o r k i n g r a n g e
Contents
5.
Working range......................................................................................59
5.1. Power supply.................................................................................................................60
5.2. Working range...............................................................................................................60
5
59
TCGB0044 rev 0 - 09/2008
Working range
5.1.Power supply
Operating voltage
90% to 110% of the nominal voltage
Voltage imbalance
Within a 3% deviation from each voltage at the main
terminal of the unit
Starting voltage
Higher than 85% of the nominal voltage
Following Council Directive 89/336/EEC and amendments 92/31/EEC and 93/68/EEC, relating to electromagnetic
compatibility, the following table indicates maximum permissible system impedance Zmax at the interface point of the
user’s power supply, in accordance with EN61000-3-11.
MODEL
Zmax (Ω)
RHUE3AVHN
0.41
RHUE4AVHN
0.41
RHUE5AVHN
0.29
RHUE5AHN
-
5.2.Working range
Model
RHUE3AVHN
Ambient Temperature
RHUE4AVHN
RHUE5AVHN
RHUE5AHN
-20 (WB) ~ 37.5°C (WB), -19.8 (DB) ~ 40°C (DB)
Hot Water Outlet Temperature
20 ~ 55°C
Minimum Flow Rate
0.4
0.6
0.8
0.8
Maximum Flow Rate
2.5
3.3
4.0
4.0
2 deg.
50
65
80
80
4 deg.
28
38
46
46
2.3L
2.3L
Minimum System
Water Volume
ON/OFF
Differential
Maximum Permissible Water Pressure
1.0MPa
2.1L
Internal Volume in Water Side Heat Exchanger
2.1L
MAIN FEATURES
Working range for hot water outlet temperature and ambient temperature
Ambient temperature (ºC DB)
40
30
20
10
5
0
-5
-10
-20
20
25
30
35
40
45
50
55
60
Hot water outlet temperature (ºC)
60
TCGB0044 rev 0 - 09/2008
Refrigerant cycle &
Hidraulic circuit
6.Refrigerant cycle and hydraulic circuit
This chapter displays the refrigerant cycle diagrams and the hydraulic circuit for the units of the YUTAKI series.
Contents
6. Refrigerant cycle and hydraulic circuit......................................................61
6.1. Refrigerant cycle..............................................................................................................62
6.2. Refrigerant charging quantity...........................................................................................63
6.3. Hydraulic circuit................................................................................................................64
6.3.1. Water piping..........................................................................................................................64
6.3.2. Minimum water volume description.......................................................................................65
6.3.3. Water control.........................................................................................................................67
6.3.4. Water check valve.................................................................................................................67
6.3.5. Pump kit installation (accessory)...........................................................................................68
6.3.6. Water electric heater installation (accessory).......................................................................73
6.4. Drain piping...................................................................................................................76
6
61
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Refrigerant cycle &
Hidraulic circuit
6.1. Refrigerant cycle
RHUE3~5A(V)HN
Refrigerant:
Defrost and
Unit Starting
Heating
Refrigerant Flow
No.
Installation
Refrigerant Piping
Line
Flare Nut
Connectiion
Name of item
Flange
Connection
Brazing
Connection
No.
Name of item
1
Compressor
10
Accumulator
2
Check Valve
11
Solenoid Valve
3
4-Way Valve
12
Silencer
4
Water Side Het Exchanger
13
Capilary Tube
5
Liquid Tank
14
Pressure Sensor (Low)
6
Strainer
15
High Pressure Switch
7
Electronic Expansion Valve
16
Pressure Sensor (High)
8
Stop Valve (Check Joint)
17
Water Inlet
9
Air Side Heat Exchanger
18
Water Outlet
Mark.
a
b
c
d
e
OD x T
12.7D x 1.0T
15.88D x 1.2T
9.53D x 0.8T
6.35D x 1.07T
6.35D x 0.7T
62
Material
C1220T-0
TCGB0044 rev 0 - 09/2008
R410A
Airtight test
pressure
4.15 MPa
Refrigerant cycle &
Hidraulic circuit
6.2. Refrigerant charging quantity
YUTAKI has been charged from factory.
 CAUTION:
If charging refrigerant accurately measure refrigerant to be charged.
Overcharging or undercharging of refrigerant might cause compressor trouble.
In case of actual piping length less than 5 m, consult your distributor.
O/U MODEL
Wo (Kg)
RHUE(3/4)AHN
RHUE5A(V)HN
2.6
2.9
 NOTE:
Yutaki is an appliance designed to be installed outdoor. Should it be covered by an enclosure, this shall be
done according to the EN378 (KHK standard can also be considered as a reference), so that the refrigerant
concentration be below 0.44 kg/m³ (i.e., provide a shutterless opening that will allow fresh air to flow into the
enclosure).
6
63
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Refrigerant cycle &
Hidraulic circuit
6.3. Hydraulic circuit
6.3.1. Water piping
When Piping Connections are performed:
1. Connect all pipes as close as possible to the unit, so that disconnection can be easily performed when required.
2. It is recommended to use flexible joints for the piping of water inlet and outlet, so vibration will not be transmited.
3. Whenever possible, sluice valves should be installed for water piping, in order to minimise flow resistance and to
maintain sufficient water flow.
4. Proper inspection should be performed to check for leaking parts inside and outside the system, by completely
opening the hot water inlet and outlet valves to the water condenser.
Additionally, install equip valves to the inlet and outlet piping.
5. This unit is equipped with an air purge at the highest position of the water system. If this position is not the highest
one within the whole water installation, equip another air purge.
Also, equip a drain cock on the outlet piping. The cock handle should be removed so that the cock can not be
opened under normal circumstances. If this cock is opened during operation, trouble will occur due to water blowoff.
6. When necessary, put insulation on the pipes in order to avoid heat losses.
7. When the unit is stopped during shutdown periods and the ambient temperature is very low, it is possible that the
water in the pipes and in the circulating pump freeze, thus damaging the pipes and the water pump.
In order to prevent this, during shutdown periods it is useful to empty the water from the installation. Otherwise, it
is recommended to maintain the power supply to the installation, since an electric cord could prevent the freezing
of the water contained in the circuit.
Additionally, in cases where water drainage is difficult, an antifreeze mixture of glycol (ethylene or propylene)
should be used (content between 10 % and 40 %).
The performance of the unit working with glycol may decrease in proportion to the percentage of glycol used,
since the density of glycol is higher than that of water. (For more information, see section 4.4.2.
No.
Water inlet
Yutaki
Water outlet





Name of item
Pressure gauge
Strainer
Flexible joint
Valve
Check valve
 CAUTION:
−− This product is equipped with plate type heat exchanger. In the plate heat exchanger water flows through a
narrow space between the plates. Therefore, there is a possibility that freezing may occur if foreign particles or
dust are clogged. In order to avoid this clogging, 20 mesh water strainer shall be attached at the inlet of chilled
water piping near the product. In case of punching metal type strainer, mesh hole size shall be Ø 1.5mm or less.
Never use the salt type antifreeze mixture, because it possesses strong corrosion characteristics, and water
equipment will be damaged.
−− In case of connecting some units to the same water piping, design the water piping so that the water distribution
to each unit is equal (refer to figure below). Imbalance of water distribution may cause a serious damage like
water freezing in the heat-exchanger.
Yutaki unit
Working condition
Pressure range
0 ~ 1.0 MPa
Water temp. range - 20ºC ~ 90ºC
Indoor installation
(heating elements)
Pressure range of
water main
64
TCGB0044 rev 0 - 09/2008
0.17 ~ 0.2 MPa
Refrigerant cycle &
Hidraulic circuit
6.3.2. Minimum water volume description
Necessity of Water in System and Summary of Calculation
The following problems may occur when the quantity of water in the forced circulation system(1) on water side is
insufficient.
1. Compressor in operation repeats rough stops when light-loaded, which may result in shorter life or an accident.
2. Low temperature in water circulation system at defrosting, which may cause an alarm (freeze protection).
 NOTE:
(1)
The shaded part of the pipe system below.
* Excluding the expansion tank (cistern)
Calculate and ensure that the water volume in the system is equal or greater than the larger value obtained from:
--“Protective Water Volume for Product“ and
--“Minimum Water volume for Temperature Drop at Defrosting“, as shown to the right. Use a “buffer tank “ to
supply water shortage as shown below(2), when the minimum water volume cannot be ensured.
 NOTE:
(2)
Shortage = Minimum Water Volume – Water Volume in Circulation System
Expansion
vesel
Chiller unit
Pump
Load
system
Expansion
vesel
6
Buffer tank
Pump
Load
system
Chiller unit
The following part shows how to calculate the minimum water volume in the system for product protection (antihunting) and temperature drop at defrosting.
Protective Water Volume for Product
Ensure that the water volume is equal or greater than those shown right, in order to lower ON/OFF frequency of
Chiller Unit at no load or extreme light load. When water volume is less than the volume indicated (minimum water
volume), compressor operation frequently stops at light load, which may result in shorter life or failure.
 IMPORTANT NOTE:
The factory default ON/OFF temperature differential is “4 °C”. Note that the minimum water volume varies for
different setting for each purpose as shown in the table on the right.
(Unit: x 10-3 m3)
Model
ON/OFF Temp.
Differential
65
RHUE3AVHN RHUE4AVHN
RHUE5AVHN
RHUE5AHN
4 ºC
28
38
46
3 ºC
36
48
58
2 ºC
50
65
80
1 ºC
80
107
130
TCGB0044 rev 0 - 09/2008
Refrigerant cycle &
Hidraulic circuit
¡¡ Minimum required water volume during defrosting
-- The following formula is used to make the calculation:
Where:
v=
QDEF
ΔT x 4168.8
; QDEF=QI+QY
v = Required water volume (m3)
The minimum volume of water needed in the installation to cover the heat loss caused by a reduction in the delivery
water temperature during defrosting.
ΔT= Permissible water temperature drop (ºC)
Drop in the delivery water temperature that the client is willing to allow in the installation.
QDEF = Heat loss during defrosting (kJ)
Heat loss caused in the system by reducing the delivery water temperature, which may affect the user’s comfort
level of warmth. This value is 10% of the sum of the two following items:
QI = Heat demand from the installation (kJ)
While defrosting is taking place, the unit is not providing the heat required to cover the heat demand from
the installation. This value can be obtained in 2 ways:
1. By using the value of the energy demand from the installation, if known.
2. If this value is not known, it can be estimated by using the heating capacity of the unit at an air
temperature of 0ºC WB and a delivery water temperature at, for example, 45ºC.
QY = Cooling load on the YUTAKI unit (kJ)
In addition to not providing the heat required to cover the heat demanded by the installation during
defrosting, the unit is also producing cold. It can be estimated that this value is approximately 85% of the
heating capacity on the unit under standard conditions (air temperature: 6/7ºC (WB/DB) and input/output
temperature of the water: 40 / 45 ºC)
 NOTE:
The 10% applied to QEDF is due to the fact that the maximum time for defrosting is 6 minutes per hour.
The following table shows the minimum water volume needed in each YUTAKI unit in case of a permitted drop in
temperature of 10ºC.
(Unit: l)
Model
Water
temperature
drop
10ºC
 IMPORTANT NOTE:
RHUE3AVHN RHUE4AVHN
106
138
RHUE5AVHN
RHUE5AHN
171
The values shown on the table are based on theoretical installation conditions, and therefore, it rests with the client
to recalculate these values depending on the real conditions of the installation.
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TCGB0044 rev 0 - 09/2008
Refrigerant cycle &
Hidraulic circuit
6.3.3. Water control
 CAUTION:
When industrial water is applied for chilled water and condenser water, industrial water it rarely causes deposits
of scales or other foreign substances on the equipment. However, well water or river water should in most cases
contain suspended solid matter, organic matter, and scales in great quantities. Therefore, such water should be
subjected to filtration or to a softening treatment with chemicals before application as chilled water.
It is also necessary to analyse the quality of water by checking pH, electrical conductivity, ammonia ion content,
sulphur content, and others. Should the results of the analysis be not good, the use of industrial water would be
recommended.
The following is the recommended standard water quality.
Chilled Water System
Item
Circulating Water
(20 C Less than)
Supply Water
6.8 ~ 8.0
Less than 40
Less than 400
Less than 50
Less than 50
6.8 ~ 8.0
Less than 30
Less than 300
Less than 50
Less than 50
Less than 50
Less than 50
Less than 70
Less than 50
Less than 30
Less than 70
Less than 50
Less than 30
Less than 1.0
Less than 0.3
Standard Quality pH (25 °C)
Electrical Conductivity (mS/m) (25°C)
{µS/cm} (25 °C) (2)
Chlorine Ion (mg CI¯/I)
Sulphur Acid Ion (mg SO42¯/I)
The Amount of Acid Consumption (pH 4.8)
(mg CaCO3/I)
Total Hardness (mg CaCO3 /I)
Calcium Hardness (mg CaCO3 /I)
Silica L (mg SIO2 /I)
Reference Quality
Total Iron (mg Fe/I)
Total Copper (mg Cu/I)
Sulphur Ion (mg S2¯/I)
Ammonium Ion (mg NH4+/I)
Remaining Chlorine (mg CI/I)
Floating Carbonic Acid (mg CO2/I)
Index of Stability
Tendency (1)
Corrosion
Deposits of
Scales
Less than 1.0
Less than 0.1
It shall not be detected.
Less than 1.0
Less than 0.1
Less than 0.3
Less than 0.3
Less than 4.0
Less than 4.0
6.8 ~ 8.0
-
 NOTE:
(1)
(2)
The mark “ ” in the table means the factor concerned with the tendency of corrosion or deposits of scales.
The value showed in “{}" are for reference only according to the former unit.
6.3.4. Water check valve
Attached to the unit there is a water check valve (non return valve). This component is a safety device to protect the
system against back pressure, back flow and back syphonage of non-potable water into service pipe, plants and
equipments.
This valve shall be installed at site.
Main Characteristics:
-- Maximum working Pressure: 16bar
-- Maximum working Temperature: 70ºC (short term 90ºC)
-- Threaded connection R1/2”
-- Available test and drain plugs 1/4”
-- Length: 137mm
-- Kvs value: 6
-- Weight: 0.24kg
Installation guidelines:
1. Note flow direction (indicated by arrow) when installing the check valve.
2. In a drinking water supply the check valves are fitted immediately after water meter. This position ensures
optimum protection for the drinking water supply.
3. Install in horizontal pipework with test plugs directed downwards. This position ensures optimum protection
efficiency and is the best for testing the valve.
4. Shutt off valves should be fitted on each side of the check valve for easier and faster valve testing.
5. The installation location should be protected against frost and be easily accessible.
67
TCGB0044 rev 0 - 09/2008
6
Refrigerant cycle &
Hidraulic circuit
6.3.5. Pump kit installation (accessory)
Pump kit assembly
Standard heater
assembly
No.
Name of item
No.
Name of item
1
Service Cover 1
7
Pipe support
2
Service Cover 2
8
Band
3
Stay
9
Pipe Assembly 1
4
Plate Heat Exchanger Assembly
10
Packing
5A
Male insert of coupling
11
Water pump
5B
Nut of coupling
12
Pipe Assembly 2
5C
Female insert of coupling
13
6
Standard pipe assembly
 NOTE:
To obtain more information about pump kit refer to the Installation and Operation Manual of the pump.
68
TCGB0044 rev 0 - 09/2008
Heater assembly
with pump kit
Refrigerant cycle &
Hidraulic circuit
1. Prepare the pump assembly
−−
Connect the pipe assembly 1 (item 9) with the pump, placing a packing (item 10) between them carefully.
−−
Connect the pipe assembly 2 (item 12) with the pump, placing a packing (item 10) between them carefully.
2. Prepare the Yutaki unit for the pump installation
−−
Remove Service Cover 1 (item 1), Service Cover 2 (item 2) and horizontal stay (item 3) in order to make easier
the change of piping.
−−
Remove the insulations and the Water Heater (item 13) from the inlet water pipe only.
−−
nscrew the nut of Rotalock coupling (item 5B) in order to disassemble the standard pipe assembly (item 6) from
U
the Yutaki unit.
−−
emove the fixing band (item 8) from the pipe support (item 7). Now it is possible to remove the standard pipe
R
assembly.
−−
nscrew the female insert of Rotalock coupling (item 5C) from the pipe assembly (item 6). Remove rests of teflon
U
tape on internal thread of item 5C.
3. Pump assembly installation on Yutaki unit
−−
dd teflon tape to the screw of pump assembly. Connect the female insert of Rotalock coupling (item 5C) with the
A
pump assembly.
−−
Place the pump assembly inside the Yutaki unit and fix it to the pipe support (item 7) with the fixing band (item 8).
−−
onnect the pump assembly to the plate heat exchanger assembly (item 4) with the nut of Rotalock coupling
C
(item 5B).
−−
dd the Water Heater (item 13) and put the insulations on the inlet water pipe (except for the pump section) as
A
shown in Heater Assembly detail.
−−
Connect the pump wiring from the electrical box to the pump according to the detail.
−−
ssemble the horizontal stay (item 3), Service Cover 2 (item 2) and Service Cover 1 (item 1) to finish the
A
installation.
To pump
To electrical box
69
TCGB0044 rev 0 - 09/2008
6
Refrigerant cycle &
Hidraulic circuit
Water pump kit (Hitachi supplied)
1. General information
Assembly and installation should only be carried out by qualified personnel.
 CAUTION:
The pumps range must not be used for drinking water or foodstuffs.
2. Working range
Observe pump rating plate data.
−−
−−
Temperature range of the flow medium:
Flow medium
Temperature range
Water and water-glycol
mixture of a ratio of up to 1:1
-20ºC to +130ºC
(short term (2h): +140ºC)
Minimum inlet pressure at the pump suction side in order to prevent cavitation noises at an ambient temperature
of +40ºC and a water temperature of Tmax.
Tmax
Rp 3/4
Rp 1
Rp 1/4
DN 32/40
DN 50
DN 65
DN 80
+50ºC
0.05 bar
0.3 bar
+95ºC
0.5 bar
1.0 bar
+110ºC
1.1 bar
1.6 bar
+130ºC
2.4 bar
2.9 bar
DN 100
3. Components supplied
−−
Complete pump
−−
Two-part heat insulation (for single pump only)
−−
2 seals (for threaded connections only)
4. Installation
−−
The pump must be installed in a dry, well-ventilated and frost-free place.
−−
Before installing the pump, remove the two halves of the heat insulation shell.
−−
Installation should only take place once all welding and soldering work has been completed and the pipe network
has been rinsed. Dirt can have an adverse effect on the functioning of the pump.
−−
The pump mus be installed in an easily accessible place to facilitate inspection and replacement.
−−
It is recommend that shut-off devices be installed at the inlet and at the outlet of the pump. This will avoid to drain
and refill the entire system if the pump needed to be replaced.
Assemble the pump such that water cannot drip onto the pump motor or terminal box.
70
TCGB0044 rev 0 - 09/2008
Refrigerant cycle &
Hidraulic circuit
−−
Carry out stress-free installation with the pump motor shaft in horizontal plane (see installation position in the next
figure).
−−
The flow direction of the pump of the pump medium must correspond to the directional arrow on the pump
housing.
−−
The motor terminal box must not point down-wards (see admissible installation position in previous figure). It may
be necessary to turn the motor housing round after loosening the hexagon socket screws.
ATTENTION:
Risk of damage to the O-ring!
When turning the motor housing round, ensure the O-ring between the can pot and the pump housing does not
become damaged. The O-ring must not be turned and must remain at the edge of the can pot pointing towards
the impeller.
ATTENTION:
Risk of build-up of condensation water!
For units that require insulation and for which the standard insulation provided cannot be used, only the pump
housing may be insulated. The condensation water openings on the motor flange must be left open.
5. Electrical connection
 DANGER:
Due to the presence of a hazardous contact voltage (capacitors).
−−
The supply cable must be laid in such a way that it never touches the pipework and/or the pump and motor casing.
−−
To guarantee protection against dripping water and to ensure strain relief of the cable gland (PG 13.5), a
connecting cable with an external diameter of 10-12 mm is to be used and assembled as shown in the next figure).
71
TCGB0044 rev 0 - 09/2008
6
Refrigerant cycle &
Hidraulic circuit
6. Operation
The system must be filled and vented properly. The pump rotor chamber will vent automatically after a short running
period. Brief dry running will not damage the pump. The pumps wich are equipped with vent screws can be ventilated
as follows if necessary:
−−
Switch off the pump.
−−
Close the shut-off valve on the discharge side.
ATTENTION:
Risk of scalding!
Depending on the fluid temperature and the system pressure, if the vent screw is completely loosened hot liquid
or gas may escape or even shoot out at high pressure.
−−
Protect all electrical parts against the water released from the unit.
8. Troubleshooting
Problem
Cause
Electrical fuse faulty / has switched off.
Residual current operated circuit-braker has tiggered.
Motor is
switched on
but fails to Undervoltage.
run
Winding damage.
Remedy
Change fuse/switch on electrical connection. Should the
fuse blow several times in a row:
-- Check the pump for electrical faults.
-- Check the pump mains cable and electrical connection
Switch residual current operated circuit-breaker back on.
Should the circuit-breaker trip several times in a row:
-- Check the pump for electrical faults.
-- Check the pump mains cable and electrical connection
Check the voltage at the pump (observe rating plate data)
Call customer services
Faulty terminal box.
Call customer services
Faulty capacitor (with 1~ only).
Terminal box type 1/2/3/6/7.
Replace the capacitor
Speed selection connector not installed.
Terminal box type 3/4/5.
Fit speed selection connector
Bridge not or incorrectly assembled.
Correctly assemble bridge, see connection diagrams
Terminal box type 6/7 for 1~3- operation: green LED on
Model
Protection type (Cut-out)
TOP-S 25/7
Auto reset
Connection terminals
1~ 230 V, 50 Hz
TOP-S 25/10
Manual reset
 NOTE:
* WSK: Thermal winding contact
72
TCGB0044 rev 0 - 09/2008
Refrigerant cycle &
Hidraulic circuit
6.3.6. Water electric heater installation (accessory)
Three-stage water heater assembly
In a mono-energetic system (CONF 2), the electric heater is used if required to increase the supply water
temperature.
System control
TERMINAL BLOCK A
7
8
9
Output 2
N
Output 1
Electric heater
−− Follow installation guide attached to water electric heater.
−− Ensure that maximum water pressure of water circuit is inside water heater range. If necessary, install some high
pressure switch to protect the heater.
−− Ensure that water heater includes protection against:
−− No water flow.
−− Water leakage or no water inside water circuit.
−− Other possible abnormal performance.
Water electric heater (Hitachi supplied)
Water outlet (1”)
6
Water inlet (1”)
1. General data
Concept
Range
Electric power
supply
1~ 230 V 50 Hz or 3N~ 400 V 50 Hz
(See wiring connection diagram)
Electric power
input
6 kW
Regulation
3 steps, 2/ 4/ 6 kW
Dimensions
475 mm x 186 mm x 145 mm
Weight
3.920 kg
Standards
EN60335-1; EN60335-2-40
2. Working range
Range
Concept
73
Min.
Max.
Water flow
3
0.4 m /h
4 m /h
Water
temperature
+20ºC
+65ºC
Water pressure
1 bar
7 bar
TCGB0044 rev 0 - 09/2008
3
Refrigerant cycle &
Hidraulic circuit
3. Supplied components
−− Water Electric Heater
−− Low Water Pressure Switch:
−− 1 bar set (Max. pressure 7 bar)
−− Auxiliar Contact N.O. (16 A, 250 V)
−− Water Electric Heater Manual
4. Installation
−− The heater will be installed horizontally with inlet piping water down and outlet piping water up to purge the air
naturally inside the heater.
−− Circulation heater will be fix with inlet and outlet pipings;
−− The free space for the installation of the heater should be at least 650 mm x 200 mm x 200 mm
−− Forced ventilation of the area is not necessary, simply avoid the containment of this area to protect against a
possible rise in temperature.
−− Ensure that there are no flammable substances less than 500 mm near to the heater.
−− Ensure that a bleed-tap is automatically installed on the hydraulic.
−− Provide easy access for electrical connections and easy disassembly of the heater in case servicing.
−− The water heater connection is made with threaded fittings size 1’’male; ensure to seal inlet and outlet
connections and a good anchor to the wall or floor supports.
−− These supports must be within 100 mm maximum from heater inlet & outlet.
−− Ensure that the hydraulic system has a device permitting reduced and protect to maximum water pressure of 7
bars.
−− Test the water tightness of connections before switching the heater .
−− Check that the hydraulic connections are tight
−− Check that the water flow is constant and that the purge of the circuit is correct
−− Check that the protections and electrical connections are corrects regarding electrical diagramm and this notice.
−− Install low water pressure switch according to water heater instructions.
−− Install water thermistor sensor (TSVP) as nearest as possible of water heater outlet.
5. Electrical wiring
−− Install the unit in a restricted area not accessible by the general public.
−− Follow local codes and regulations when selecting field wires, circuit breakers and earth Leakage breakers
(See section 9.2. of this catalogue or Heater manual for more information).
Customer connection:
System controller
(Terminal block A)
Alimentation/Supply
3N~400V 50 Hz
Inmersion heater
Alimentation/Supply
1~230V 50 Hz
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System controller
(Terminal block A)
Refrigerant cycle &
Hidraulic circuit
6. Operation
The heater operation is controlled by the System Control. The heat need is calculated and regulated by the heat
pump controler by using 3 steps :
R1 Electric
resistance
1
R2 Electric
resistance
2
R3 Electric
resistance
3
Total power
Step 0:
OFF
OFF
OFF
0 kW
Step 1:
ON
OFF
OFF
2 kW
Step 2:
OFF
ON
ON
4 kW
Step 3:
ON
ON
ON
6 kW
Regulation
step
7. Troubleshooting
Before checking ensure to disconnect any electrical power supply to the heater
In case of non-functioning heater should check:
−− That signals to the heat pump are correctly connected
−− That fuse protection of heater are in good condition
−− That water flow is assured permanently
−− That there is a minimum water pressure of 1 bar and LPSW has not cut out the circuit
−− That thermostat button and ensure that it has not cut out by exceding temperature
Press firmly on the safety manual reset button located between the 2 relays electrical power to rearm the safety cut
out (It may be that safety cut out is triggered due to a stoppage of water flow)
In case of non-function, remove circulation heater
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6
Refrigerant cycle &
Hidraulic circuit
6.4.Drain piping
¡¡Drain Discharging Boss
When the base of the unit is temporarily used as a drain receiver and the drain water in it is discharged, this drain boss is
used to connect the drain piping.
Model
Applicable Model
DBS-26
RHUE(3~5)A(V)HN
Connecting procedure
1. Insert the rubber cap into the drain boss up to the extruded portions
2. Insert the boss into the unit base and turn approximately 40 degree counter-clockwise.
3. Size of the drain boss is 32 mm (O.D.)
4. A drain pipe should be field-supplied
 NOTE:
Do not use this drain boss set in a cold area because the drain water may freeze.This drain boss is not sufficient to
collect all the drain water. If collecting drain water is completely required, provide a drain-pan that is bigger than the
unit base and install it under the unit with drainage.
Drain pipe
Drain pipe
Extruded portion
Drain hole of
Base
Drain Boss
Rubber cap
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System
settings
(available accessories)
7.System settings (available accessories)
Contents
7.
System settings (available accessories)..............................................77
7.1.Available systems..............................................................................................................78
7.1.1.“Monovalent” Systems...........................................................................................................78
7.1.2.“Mono-Energy” Systems........................................................................................................79
7.1.3. “Parallel Bivalent - Direct” Systems......................................................................................81
7.1.5. “Series Bivalent - Direct” Systems ......................................................................................83
7
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System
settings
7.1.Available systems
7.1.1.“Monovalent” Systems
The YUTAKI system is designed to provide 100% of the heating capacity on the coldest day of the year. This
type of system is recommended for low energy consumption dwellings and for moderate climates not subject
to harsh winters.
It is used for new systems or when traditional boilers are replaced.
The following are the possible settings for this system:
1. No ACS tank and no hydraulic separator/inertia tank.
INPUTS
AI1
DI1
DO1
AO1
AI2
AI3
OUTPUTS
AI1
Outdoor sensor
AO1
AI2
Supply sensor
DO1
AI3
Return sensor
DO2
AI4
-
DO3
AI5
-
DO4
DI1
Heat-pump fault
DO5
DI2
-
DO6
Heat-pump 4-20mA
Heat-pump remote on/off
-
Heat pump
2. No ACS tank and a hydraulic separator/inertia tank.
INPUTS
AI1
Hydraulic
separator
DO1
AO1
DI1
DO2
AI2
AI3
OUTPUTS
AI1
Outdoor sensor
AO1
Heat-pump 4-20mA
AI2
Supply sensor
DO1
AI3
Return sensor
DO2
Secondary pump
AI4
-
DO3
AI5
-
DO4
DI1
Heat-pump fault
DO5
DI2
Tarif/timer
DO6
-
Heat pump
3. An ACS tank + three-way valve and no hydraulic separator/inertia tank
DHW
storage
tank
AI1
INPUTS
DO6
AI4
AO1
DO1 DI1
AI2
DO3
AI3
Heat pump
NOTE:
AI: Analogic Input
DI: Digital Input
AO: Analogic Output
DO: Digital Output
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OUTPUTS
AI1
Outdoor sensor
AO1
Heat-pump 4-20mA
AI2
Supply sensor
DO1
AI3
Return sensor
DO2
AI4
DHW sensor
DO3
AI5
-
DO4
DI1
Heat-pump fault
DO5
DI2
Tarif/timer
DO6
DHW valve
DHW tank heater enable
System
settings
4. An ACS tank + three-way valve and a hydraulic separator/inertia tank
DHW
storage
tank
AI1
INPUTS
DO6
AI4
DO1
AO1
DI1
Hydraulic
separator
DO2
DO3
AI2
AI3
Heat pump
OUTPUTS
AI1
Outdoor sensor
AO1
Heat-pump 4-20mA
AI2
Supply sensor
DO1
AI3
Return sensor
DO2
Secondary pump
AI4
DHW sensor
DO3
DHW valve
AI5
-
DO4
DI1
Heat-pump fault
DO5
DI2
-
DO6
5. An ACS tank + water pump and a hydraulic separator/inertia tank
DHW
storage
tank
DO6
AI4
DO2
DO3
DO1
AO1
DI1
INPUTS
Hydraulic
separator
AI2
AI3
Heat pump
OUTPUTS
AI1
Outdoor sensor
AO1
Heat-pump 4-20mA
AI2
Supply sensor
DO1
AI3
Return sensor
DO2
Secondary pump
AI4
DHW sensor
DO3
DHW pump
AI5
-
DO4
DI1
Heat-pump fault
DO5
DI2
-
DO6
7.1.2.“Mono-Energy” Systems
The YUTAKI system is designed to provide around 60% of the heating capacity for the coldest day of the
year, and to provide 90-95% of the capacity required throughout the entire heating season. An auxiliary
electrical resistance will be responsible for providing the rest of the caloric energy on the coldest days. This
is one of the most common systems since it gives the right balance between operating and investment costs.
It is usually used for new systems or when traditional boilers are replaced.
1. No ACS tank and no hydraulic separator/inertia tank.
AI1
INPUTS
AO1
DO1
DO4
DO5
DI1
Electric
heater
AI2
AI3
Heat pump
NOTE:
AI: Analogic Input
DI: Digital Input
AO: Analogic Output
DO: Digital Output
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OUTPUTS
AI1
Outdoor sensor
AO1
Heat-pump 4-20mA
AI2
Supply sensor
DO1
AI3
Return sensor
DO2
-
AI4
-
DO3
-
AI5
-
DO4
Electric heater output 1
DI1
Heat-pump fault
DO5
DI2
-
DO6
-
7
System
settings
2. No ACS tank and a hydraulic separator/inertia tank.
AI1
AO1
DO1
Electric
heater
DO4
DO5
DI1
INPUTS
DO2
Hydraulic
separator
AI2
AI3
Heat pump
OUTPUTS
AI1
Outdoor sensor
AO1
Heat-pump 4-20mA
AI2
Supply sensor
DO1
AI3
Return sensor
DO2
Secondary pump
AI4
-
DO3
-
AI5
-
DO4
DI1
Heat-pump fault
DO5
DI2
-
DO6
-
3. An ACS tank + three-way valve and no hydraulic separator/inertia tank
DHW
storage
tank
AI1
DO6
INPUTS
AI4
DO1
AO1
DI1
DO3
Electric
heater
DO4
DO5
AI2
AI3
OUTPUTS
AI1
Outdoor sensor
AO1
Heat-pump 4-20mA
AI2
Supply sensor
DO1
AI3
Return sensor
DO2
-
AI4
DHW sensor
DO3
DHW valve
AI5
-
DO4
Electric Heater output 1
DI1
Heat-pump fault
DO5
DI2
Tarif/timer
DO6
Heat pump
4. An ACS tank + three-way valve and a hydraulic separator/inertia tank
DHW
storage
tank
AI1
DO6
AI4
AO1
DO1
DI1
Hydraulic
separator
INPUTS
DO2
DO3
DO4
DO5
AI3
Electric
heater
AI2
Outdoor sensor
AO1
Heat-pump 4-20mA
AI2
Supply sensor
DO1
AI3
Return sensor
DO2
Secondary pump
AI4
DHW sensor
DO3
DHW valve
AI5
-
DO4
DI1
Heat-pump fault
DO5
-
DO6
DI2
Heat pump
NOTE:
AI: Analogic Input
DI: Digital Input
AO: Analogic Output
DO: Digital Output
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OUTPUTS
AI1
System
settings
5.An ACS tank + water pump and a hydraulic separator/inertia tank
DHW
storage
tank
AI1
DO6
AO1
DO1
Hydraulic
separator
DI1
DO2
AI4
DO3
Electric
heater
DO4
DO5
INPUTS
AI2
AI3
Heat-Pump
OUTPUTS
AI1
Outdoor sensor
AO1
Heat-pump 4-20mA
AI2
Supply sensor
DO1
AI3
Return sensor
DO2
Secondary pump
AI4
DHW sensor
DO3
DHW valve
AI5
-
DO4
DI1
Heat-pump fault
DO5
DI2
-
DO6
NOTE:
The electrical resistance provides the additional energy in three stages through two control relays. These
relays must be connected to the switches so that the second relay operates twice the power of the first
relay.
(Example for a 6 kW electrical resistance)
Relay 1
Relay 2
Stage 1 (2kW)
ON
OFF
Stage 2 (4kW)
OFF
ON
Stage 3 (6kW)
ON
ON
7.1.3. “Parallel Bivalent - Direct” Systems
This type of system is recommended for supplementary applications in which there is already a traditional
boiler (gas/oil) and which will be used to provide the extra power on the coldest days of the year.
1. No ACS tank
DO5
AI1
AO1
INPUTS
DO6
DO1
DI1
System boiler
AI2
DO2
AI3
AI1
Outdoor sensor
AO1
Heat-pump 4-20mA
AI2
Supply sensor
DO1
AI3
Return sensor
DO2
Secondary pump
AI4
-
DO3
-
AI5
-
DO4
-
DI1
Heat-pump fault
DO5
Boiler pump
Tarif/timer
DO6
Boiler on/off
DI2
Heat pump
Hydraulic separator
NOTE:
AI: Analogic Input
DI: Digital Input
AO: Analogic Output
DO: Digital Output
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OUTPUTS
7
System
settings
2. An ACS tank + three-way valve
DHW
storage
tank
DO5
AI1
INPUTS
DO6
AI4
DO2
System boiler
DO1 DI1
AO1
DO3
AI2
AI3
Heat pump
OUTPUTS
AI1
Outdoor sensor
AO1
Heat-pump 4-20mA
AI2
Supply sensor
DO1
AI3
Return sensor
DO2
Secondary pump
AI4
DHW sensor
DO3
DHW valve
AI5
-
DO4
-
DI1
Heat-pump fault
DO5
Boiler pump
DI2
Tarif/timer
DO6
Boiler on/off
Hydraulic separator
3. An ACS tank + water pump
DHW
storage
tank
DO5
AI1
INPUTS
DO6
AI4
DO3
AO1
DO1
DI1
System boiler
DO2
AI2
AI3
Heat pump
OUTPUTS
AI1
Outdoor sensor
AO1
Heat-pump 4-20mA
AI2
Supply sensor
DO1
AI3
Return sensor
DO2
Secondary pump
AI4
DHW sensor
DO3
DHW pump
AI5
-
DO4
-
DI1
Heat-pump fault
DO5
Boiler pump
DI2
Tarif/timer
DO6
Boiler on/off
Hydraulic separator
7.1.4. “Parallel Bivalent - Mixture” Systems
1. No ACS tank + three-way valve
DO3
DO6
AI1
INPUTS
System boiler
AO1
DO1
DO1
DO4
DO5
AI2
DO2
AI5
AI3
Heat pump
Hydraulic separator
NOTE:
AI: Analogic Input
DI: Digital Input
AO: Analogic Output
DO: Digital Output
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OUTPUTS
AI1
Outdoor sensor
AO1
Heat-pump 4-20mA
AI2
Supply sensor
DO1
AI3
Return sensor
DO2
Secondary pump
AI4
-
DO3
Boiler pump
AI5
Mixed supply sensor
DO4
Mixing valve (open)
DI1
Heat-pump fault
DO5
Mixing valve (close)
DI2
Tarif/timer
DO6
Boiler on/off
System
settings
7.1.5. “Series Bivalent - Direct” Systems
This system is also used as a supplement, operating in a similar manner to “mono-energy” systems.
However, it uses the traditional boiler (installed in series) as the supplementary element instead of an
auxiliary electrical resistance. The boiler only provides the extra power tip.
1. No ACS tank
AI1
AI2
DO4
DO5
DO6
AO1 DO1 DI1
INPUTS
DO2
AI5
Hydraulic
separator
AI3
System boiler
OUTPUTS
AI1
Outdoor sensor
AO1
Heat-pump 4-20mA
AI2
Supply sensor
DO1
AI3
Return sensor
DO2
Secondary pump
AI4
-
DO3
-
AI5
Mixed supply sensor
DO4
Mixing valve (open)
DI1
Heat-pump fault
DO5
DI2
Tarif/timer
DO6
Boiler on/off
Heat pump
2. An ACS tank + three-way valve
Electric
heater
AI1
AI4
DO4
DO5
DO2
AI5
AI2
DO6
INPUTS
DO3
Hydraulic
separator
AI3
AO1
DO1
System Boiler
DI1
OUTPUTS
AI1
Outdoor sensor
AO1
Heat-pump 4-20mA
AI2
Supply sensor
DO1
AI3
Return sensor
DO2
Secondary pump
AI4
DHW sensor
DO3
DHW valve
AI5
Mixed supply sensor
DO4
Mixing valve (open)
DI1
Heat-pump fault
DO5
DI2
Tarif/timer
DO6
Boiler on/off
Heat pump
3. An ACS tank + water pump
DHW
storage
tank
AI1
AI4
AI2
DO4
DO5
DO6
AO1
DO3
DO2
AI5
Hydraulic
separator AI3
System boiler
DO1 DI1
Heat pump
NOTE:
AI: Analogic Input
DI: Digital Input
AO: Analogic Output
DO: Digital Output
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INPUTS
OUTPUTS
AI1
Outdoor sensor
AO1
Heat-pump 4-20mA
AI2
Supply sensor
DO1
AI3
Return sensor
DO2
Secondary pump
AI4
DHW sensor
DO3
DHW pump
AI5
Mixed supply sensor
DO4
Mixing valve (open)
DI1
Heat-pump fault
DO5
DI2
Tarif/timer
DO6
Boiler on/off
7
System
settings
7.1.4. “DHW Control functions”
¡¡ DHW Control
When DHW control is enabled, the system controller
heats the DHW tank temperature (TDHW) to the
DHW setpoint (P10). Hot supply water from the
Heat Pump or Heat Pump and Boiler is diverted to
the heat the DHW tank instead of the space heating
circuit (DHW priority).
Supply water
temperature
Supply water temperature set
by heating circuit control
time
P10 DHW setpoint
P11 DHW control differential
P12 DHW supply offset
NOTES
A DHW loading starts (power-on or DHW timer signal)
Supply water temperature set to value P10+P12 (*)
B DHW tank temperature (TDHW) rises above P10
DHW loading stops
Supply water temperature is determined by heating circuit requirements.
Configuration 2
The 3-stage electric heater cannot be used for
DHW loading. When DHW loading starts, the
3-stage electric heater is switched off. Please
refer to the configuration diagram.
Configuration 3 & 5
The boiler may also be used for DHW loading.
In this case, parameter P12 may be set to a
high value for faster DHW loading times.
C DHW tank temperature (TDHW) falls below P10-P11
DHW loading starts
Supply water temperature set to value P10+P12(*)
NOTES
The Heat Pump outlet temperature setpoint will be equal to the Supply
Water Temperature Setpoint + P31 (Heat Pump supply offset) to account
for pipe losses. The Heat Pump outlet temperature setpoint is always
limited to 55°C or 50°C depending on the outside temperature.
¡¡ DHW Electric Heater
In some situations (for example if the DHW setpoint
is set to a high value) the heat pump may take a
long time to heat the DHW tank. In this case, an
internal DHW electric heater can be used.
At first the Heat Pump will try to heat the DHW tank
to the required temperature. After a waiting time
(P27), the DHW electric heater will be enabled. The
setting of the thermostat of the DHW electric heater
should be set higher than the DHW setpoint of the
controller (P10).
Supply Water
Temperature
DHW Electric
Heater used
time
P27 DHW Electric Heater Enable Waiting Time
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A After the waiting time P27, the DHW Electric Heater is enabled
System
settings
¡¡ DHW Time Clock
It is possible to connect an external time
clock to the System Controller to provide
time-of-day switching of the DHW storage.
The external time clock should be connected
to the terminals 10 and 11, and parameter
P24 set to 3 or 4 according to the table
below.
Open circuit on
terminals 10/11
Closed circuit on terminals
10/11
0
Tarif/Timer Input is ignored
1
Tarif/Timer Input is used for Heat Pump blocking
2
Tarif/Timer input is used for Heat Pump blocking
3
DHW is blocked
DHW is enabled
4
DHW is enabled
DHW is blocked
DHW enabled
DHW blocked
DHW enabled
time
TERMINAL
BLOCK C
10 11
P24
Timer input
P24 Configuration Tariff /Timer Input
¡¡ Maximum DHW Loading Time
In case there is a continuous high demand
for DHW over a very long period, or the DHW
setpoint is set too high, the Heat Pump may
not be able to reach the desired temperature.
In this case, to ensure that heat is provided
in the living space (central heating circuit), the
DHW loading is stopped after a preset time
(parameter P27) and the system controller
returns to satisfy the demand from the heating
circuit.
After 24hrs, or at the next time clock enable
period (if an external DHW time clock is
used), the system controller tries once again
to load the DHW tank.
Note that after the DHW loading is stopped,
if the DHW electric heater is connected, then
it will continue to be enabled until the DHW
setpoint temperature is reached.
Supply Water temperature
set by heating circuit
control
Supply Water
Temperature
7
time
A DHW loading starts (power-on or DHW timer signal)
Supply water temperature set to value P10+P12 (*)
P27 Maximum Allowed DHW loading time
B DHW setpoint not reached after time P27
DHW loading stopped.
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Electrical data
8.Electrical data
This chapter describes the electrical requirements for each unit of the YUTAKI series.
Contents
8. Electrical data...........................................................................................87
8.1. Electrical data...................................................................................................................88
8
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Electrical data
8.1. Electrical data
RHUE-A(V)HN
Applicable
voltage
Main unit power
Model
Compressor and fan motor
Max.
IPT
[kW]
Max.
RNC
[A]
U
[V]
PH
f
[Hz]
U min.
[V]
U max.
[V]
PH
STC
[A]
(*)
RHUE3AVHN
230
1
50
207
253
1
-
2.24
9.9
3.9
18.0
RHUE4AVHN
230
1
50
207
253
1
-
3.02
13.4
3.9
18.0
RHUE5AVHN
230
1
50
207
253
1
-
3.80
16.9
5.8
26.0
RHUE5AHN
400
3
50
360
440
3
-
3.80
7.8
6.8
11.0
IPT
[kW]
RNC
[A]
U: Power voltage
PH: Phase (φ)
f: Frequency
STC: Starting current
RNC: Operating current
IPT: Input power

NOTES:
1. The compressor data shown in the table above are based on a combined capacity of 100% of the power supplied, with the following working
frequency:
RHUE3AVHN:
52 Hz
RHUE4AVHN
70 Hz
RHUE5A(V)HN
62 Hz
2. This data is based on the following conditions:
Hot Water Inlet/Outlet Temperature 40/45 ºC
Ambient Temperature 6 ºC (WB)
3. The “Maximum Unit Current” shown in the above table is the maximum total unit running current at the following conditions:
Supply Voltage: 90% of the rated voltage,
Unit Capacity: 100% at max. operating conditions
4. The power supply cables must be sized to cover this maximum current value.
5(*). The compressor with inverter control has low electrical power consumption at start-up
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Electrical wiring
9.Electrical wiring
This chapter describes the electrical wiring connections and how to set the dip switches of the YUTAKI series.
Contents
9. Electrical wiring........................................................................................89
9.1. General check..................................................................................................................90
9.2. Wiring size........................................................................................................................90
9.3. Setting of the DIP Switches..............................................................................................91
9.3.1. Dip switch setting and meaning............................................................................................91
9.3.2. Dip switch factory set............................................................................................................92
9
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Electrical wiring
9.1. General check
WARNING:
−− Turn OFF the main power switch on the units before carrying out electrical wiring or regular checks.
−− Check to ensure that the fan have stopped before electrical wiring work or a periodical check is performed.Protect
wires, drain pipe, electrical parts, etc. from rats or other small animals.
If all these parts are not protected, rats or other small animals may gnaw at them
and possibly cause a fire.
−− Make sure the wires are not touching the refrigerant pipes, plate edges and electricalparts on the inside of the
unit. Otherwise the wires will be damaged and may cause a fire.

NOTES:
1. Make sure that the field-supplied electrical components (main power switches, circuit breakers, wires, duct
connectors and wire terminals) have been properly selected according to the electrical data in this technical
catalog. Make sure that the components comply with the National Electrical Code (NEC).
2. Check to ensure that the power supply voltage is within ± 10% of the rated voltage.
3. Check the capacity of the electrical wiring. If the power source capacity is too low, the system cannot be started
due to voltage drop.
4. Check to ensure that the earth wire is connected.
9.2. Wiring size
¡¡ Connection Wiring
The minimum thickness of the wiring that must be used in the installation.
Model
Power supply
RHUE-3AVHN
RHUE-4AVHN
Maximum current
(A)
14.0
1~ 230V, 50Hz
RHUE-5AVHN
Size of power supply
cable
Size of control cable
EN60 335-1
EN60 335-1
2.5 mm²
18.9
4.0 mm²
26.9
6.0 mm²
RHUE-5AHN
3N~ 400V, 50Hz
11.2
2.5 mm²
(optional accessory)
1~ 230V, 50Hz
30.0
2.5 mm²
3N~ 400V, 50Hz
10.0
6.0 mm²
0.75 mm²
1.5 mm²
If the power cables are connected serially, add together the maximum current of each unit and select the
cables according to the following table.
Selection According to
EN60 335-1
90
Current i
(A)
Wire size
I≤6
0.75mm²
6 < i ≤ 10
1.0mm²
10 < i ≤ 16
1.5mm²
16 < i ≤ 25
2.5mm²
25 < i ≤ 32
4.0mm²
32 < i ≤ 40
6.0mm²
40 < i ≤ 63
10.0mm²
TCGB0044 rev 0 - 09/2008
Electrical wiring
¡¡ Main Switch Protection
Select the main switches according to the following table.
Model
Power Supply
RHUE-3AVHN
RHUE-4AVHN
1~ 230V, 50Hz
RHUE-5AVHN
Maximum Current
(A)
CB (A)
14.0
25.0
18.9
32.0
26.9
32.0
11.2
20.0
ELB
No. of Poles/A/mA
2/40/30
RHUE-5AHN
3N~ 400V, 50Hz
4/40/30
(optional accessory)
1~ 230V, 50Hz
30.0
30.0
2/40/30
3N~ 400V, 50Hz
10.0
30.0
4/40/30
9.3. Setting of the DIP Switches
9.3.1. Dip switch setting and meaning
The PCB in the unit can be set by following switches.
No.1 No.2 No.3
LED1
LED2
SEG1
LED3
LED4
RSW1
RSW2
4
5
LED6
SEG2
LED5
+
SSW
SEG3 SEG4 SEG5
PSW2 PSW1
1 2 3 4
DSW1
1 2 3 4
DSW5
-
1 2 3 4
1 2 3 4
DSW2
DSW3
0
RSW3
7
RSW4
1 2 3 4 5 6 7 8
DSW4
1 2 3 4
DSW7
JP2
1 2 3 4
DSW8
1 2 3 4
DSW9
1 2
DSW6
RSW1 & RSW2
Heating Setting Temperature
RSW3 & RSW4
Not used
SSW
Up = “+ Temp.” / Down = “-Temp.”
DSW1
Optional Functions
DSW2
Unit Control Configuration / Unit HP
DSW3
Unit Control Configuration
DSW4
Unit Model Configuration
DSW5
H-Link Available / H-Link Address
DSW6
End Resustance / Fuse Recovery
DSW7
Unit Control Configuration
DSW8
Setting Pd Pressure Sensor Type
DSW9
Setting Ps Pressure Sensor Type
LED1,2 & 3
Power Supply Indication
LED4
Operation Status Indication
LED5
Alarm Indication
LED6
Setting Mode Indication
JP2
Cut: Re-Start after Power Failure

NOTES:
1. The mark “■” indicates the position of dips switches.
2. No mark “■” indicates pin position is not affecting.

WARNING
Before setting dips switches, first turn the power supply off and then set the position of dips switches. In case of
setting the switches without turning the power supply off, the contents of the setting are invalid.
91
TCGB0044 rev 0 - 09/2008
9
Electrical wiring
9.3.2. Dip switch factory set
DSW
RHUE3AVHN
RHUE4AVHN
RHUE5AVHN
RHUE5AHN
DSW1
DSW2
DSW3
DSW4
7 8
DSW5
DSW6
DSW7
DSW8 = DSW9
(For all units)
92
TCGB0044 rev 0 - 09/2008
7 8
7 8
7 8
Troubleshooting
10.Troubleshooting
This chapter provides you with a description of the most common alarm codes of the new YUTAKI Series.
Contents
10. Troubleshooting..........................................................................................................93
10.1. Alarm code display................................................................................................................................ 94
10.2. General indication................................................................................................................................. 94
10.3. Alarm indication..................................................................................................................................... 95
10
93
TCGB0044 rev 0 - 09/2008
Troubleshooting
SEG1
No.1 No.2 No.3
10.1. Alarm code display
LED1
LED2
SEG1
LED3
SEG2
LED4
RSW1
RSW2
LED6
Upper side
4 shows unit
status
LED5
+
SSW
-
SEG3 SEG4 SEG5
Lower side shows
discharge and suction
pressure value
alternatively
0
RSW3
SEG3 SEG
5
7
RSW4
1. Status indication
PSW2 PSW1
1 2 3 4
1 2 3 4
DSW1
DSW5
10.2. General
indication
1 2 3 4
DSW2
Press the PSW2 more than 3 sec. It is changed
to status display mode.
1 2 3 42. Alarm
1 History
2 3 4 5 6 7 8
DSW3
1 2 3 4
DSW7
General indication
88
JP2
DSW4
Press the PSW1 and PSW2 together more than 3
sec. It is changed to the alarm history mode.
Content
Proceeding initialization
Power ON (During unit stoppage)
88
1 2 3 4
Pump operation (During unit stoppage)
DSW8
pU
Waiting of pump feedback (During unit operation)
pU
1 Stoppage
2 3 4 by Thermo-OFF 1 2

DSW9
DSW6
Heating operation (Normal
operation)

(1) Status I
Press the
It is chang
(2) Alarm H
Press the
Heating operation (Activation of forced compressor frequency control due to low pressure
difference:forced up)
Heating operation (Activation of forced compressor frequency control due to high pressure
difference:forced down)
Heating operation (Activation of forced compressor frequency control due to excessively high
discharge pressure: forced down)
Heating operation (Activation of forced compressor frequency control due to excessively high current
:forced down)
Heating operation (Activation of forced compressor frequency control due to excessively high inverter
fin temperature: forced down)
↔
3 sec. It is
↔
↔
↔
NOTE
Retry operation (by alarm 02-91, t1)
- The
mark “Ŷ” indicates the position of dips switches.
Retry operation (by alarm 02-e1)
- No
mark “Ŷ” indicates pin position is not affecting.
Retry operation (by alarm 02-h1)
↔
↔
↔11
↔1
↔1
Retry operation (by alarm 51, 52, 53, 54)
↔1
Retry operation (by alarm 04, 06)
WARNING
Before
setting dips switches, first turn the power s
Fun manual operation
position of dips switches. In case of setting the switch
supply off, the contents of the setting are invalid.
Initializing electronic expansion valve
eO(Flickering)

94
TCGB0044 rev 0 - 09/2008
Troubleshooting
10.3. Alarm indication
Alarm indication
Content
02↔H1
Activation of high pressure swicth
02↔h1
Activation of protection control for excessively high pressure
02↔1
Activation of low pressure control
02↔e1
Excessively low pressure difference
02↔61
Excessively high discharge gas temperature
02↔1
Excessively low temperature of heat exchanger refrigerant inlet
02↔t1
Excessively low suction gas temperature
04
Abnormal transmission between Inverter PCB and Main PCB
05
Abnormality of Power Supply Phase
06
Excessively low voltage or excessively high voltage for the inverter
11
Failure of water inlet temperature thermistor
12
Failure of water outlet temperature thermistor
13
Activation of freeze protection control (water inlet)
Activation of freeze protection control (water outlet)
02↔3
14
Excessively high water temperature (compressor running)
21
Failure of refrigerant evaporating temperature thermistor (Open/Short)
22
Failure of ambient temperature thermistor (Open/Short)
23
Failure of discharge gas temperature thermistor (Open/Short)
24
Failure of refrigerant liquid temperature thermistor (Open/Short)
26
Failure of suction gas temperature thermistor (Open/Short)
27
Failure of discharge gas pressure sensor (Open/Short)
28
Failure of suction gas pressure sensor (Open/Short)
30
Incorrect PCB Setting
40
Incorrect PCB operation
51
Abnormal operation of the current sensor
52
Activation of protection for inverter instantaneous over current
53
Transistor module protection activation
54
Increase in the inverter fin temperature
57
Abnormality of fan motor protection
5P
No feed back signal from water pump
6e
Cooler water failure (this alarm is not available in this unit)
6
Condenser water failure (this alarm is not available in this unit)
Excessively high water temperature (compressor stop)
p(flickering)
fA
Failure of fan motor (MF1)
fb
Failure of fan motor (MF2)
95
TCGB0044 rev 0 - 09/2008
10
HITACHI is participating in the EUROVENT Certification Programme.
Products are as specified in the EUROVENT Directory of Certified
Products.
Hitachi Air Conditioning Products Europe, S.A.
Ronda Shimizu,1 - Políg. Ind. Can Torrella
08233 Vacarisses (Barcelona) España
ISO 9001 Certified by AENOR, Spain
ISO 14001 Certified by AENOR, Spain
Hitachi Air Conditioning Systems Operation
Shimizu-shi, Shizuoka-ken, Japan
ISO 9001 Certified by JQA, Japan
ISO 14001 Certified by JQA, Japan
Hitachi Air Conditioning Products (M) Sdn. Bnd.
Lot No. 10, Jalan Kemajan Bangi Industrial Estate
43650 Bandar Baru Bangi, Selangor Darul Ehsan, Malaysia
Certification ISO 9001, Malaysia
Certification ISO 14001, Malaysia
TCGB0044 rev.0 - 09/2008 - Printed in Spain

NOTE - mpkylma.fi

Transcription

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