Toshiba HWS-455XWHM3-E User manual

AIR TO WATER HEAT PUMP
Hydro Unit
Model name:
HWS-455XWHM3-E
HWS-805XWHM3-E
HWS-805XWHT6-E
HWS-805XWHT9-E
HWS-1405XWHM3-E
HWS-1405XWHT6-E
HWS-1405XWHT9-E
Installation Manual
English
Français
Deutsch
Svenska
Installation Manual 1
Manuel d’installation
63
Installationshandbuch 125
Installationsanvisning 187

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Hydro Unit Installation Manual
Contents
1 General information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 Accessory parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Preparations for installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Precautions for safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Example of Hydro Unit installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Main components of Hydro Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7 Hydro Unit installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8 Group Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9 Start up and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
10 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
11 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Please read this Installation Manual carefully before installing the Air to Water Heat Pump.
• This Manual describes the installation method of the hydro unit.
• For installation of the outdoor unit, follow the Installation Manual attached to the outdoor unit.
REFRIGERANT
This Air to Water Heat Pump uses an HFC refrigerant (R410A) in order to prevent destruction of the ozone
layer.
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Hydro Unit Installation Manual
EN
1General information
System combination
General specifications
Outdoor Unit
Single Phase model
3 Phase model
Outdoor Unit
Hydro Unit HWS-
455H-E HWS- 805H-E HWS- 1105H-E HWS- 1405H-E HWS- 1105H8-E HWS- 1405H8-E HWS- 1605H8-E
HWS-
1105H8R-E HWS- 1405H8R-E HWS- 1605H8R-E
Backup
heater
HWS-455XWHM3-E ––––––– – –~,3kW
HWS-805XWHM3-E – –––––– – –~,3kW
HWS-805XWHT6-E – –––––– – –3N~,6kW
HWS-805XWHT9-E – – – – – – – – 3N~, 9 kW
HWS-1405XWHM3-E –– ~, 3 kW
HWS-1405XWHT6-E – – 3N~, 6 kW
HWS-1405XWHT9-E – – 3N~, 9 kW
220-230 V model 3 phase model 3 phase with Cord Heater
Outdoor unit HWS-455H-E HWS-805H-E HWS-1105H-E HWS-1405H-E
Power supply 220-230 V ~ 50 Hz
Type INVERTER
Function Heating & Cooling
Heating
Capacity (kW) 4.5 8.0 11.2 14.0
Input (kW) 0.92 1.79 2.30 3.11
COP (W/W) 4.90 4.46 4.88 4.50
Cooling
Capacity (kW) 4.5 6.0 10.0 11.0
Input (kW) 1.46 1.94 3.26 3.81
EER (W/W) 3.08 3.10 3.07 2.89
Refrigerant R410A
Dimension HxWxD (mm) 630x800x300 890x900x320 1,340x900x320
Outdoor unit
with Cord heater
HWS-
1105H8-E HWS- 1405H8-E
HWS-
1605H8-E
HWS-
1105H8R-E HWS- 1405H8R-E HWS- 1605H8R-E
Power supply 380-400 V 3N~ 50 Hz
Type INVERTER
Function Heating & Cooling
Heating
Capacity (kW) 11.2 14.0 16.0 11.2 14.0 16.0
Input (kW) 2.34 3.16 3.72 2.34 3.16 3.72
COP 4.804.444.304.804.444.30
Cooling
Capacity (kW) 10.0 11.0 13.0 10.0 11.0 13.0
Input (kW) 3.26 3.81 4.80 3.26 3.81 4.80
EER 3.07 2.89 2.71 3.07 2.89 2.71
Refrigerant R410A
Dimension HxWxD (mm) 1,340x900x320
Cord heater (W) – 75
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Hydro Unit Installation Manual
Hydro Unit
4.5 kW model
8 kW model
11 kW, 14 kW, 16 kW model
Hot Water Cylinder (option)
Hydro Unit HWS-455XWHM3-E
Back up heater capacity (kW) 3.0
Power supply
for back up heater 220-230 V ~ 50 Hz
for hot water cylinder heater
(option) 220-230 V ~ 50 Hz
Leaving water
temperature
Heating (°C) 20-55
Cooling (°C) 7-25
Hydro Unit HWS-805XWHM3-E HWS-805XWHT6-E HWS-805XWHT9-E
Back up heater capacity (kW) 3.0 6.0 9.0
Power supply
for back up heater 220-230 V ~ 50 Hz 380-400 V 3N~ 50 Hz 380-400 V 3N~ 50 Hz
for hot water cylinder heater
(option) 220-230 V ~ 50 Hz
Leaving water
temperature
Heating (°C) 20-55
Cooling (°C) 7-25
Hydro Unit HWS-1405XWHM3-E HWS-1405XWHT6-E HWS-1405XWHT9-E
Back up heater capacity (kW) 3.0 6.0 9.0
Power supply
for back up heater 220-230 V ~ 50 Hz 380-400 V 3N~ 50 Hz 380-400 V 3N~ 50 Hz
for hot water cylinder heater
(option) 220-230 V ~ 50 Hz
Leaving water
temperature
Heating (°C) 20-55
Cooling (°C) 7-25
Hot water cylinder (option) HWS-1501CSHM3-E
HWS-1501CSHM3-UK HWS-2101CSHM3-E HWS-2101CSHM3-UK HWS-3001CSHM3-E HWS-3001CSHM3-UK
Water volume (liter) 150 210 300
Power supply 220-230 V ~ 50 Hz
Max water temperature (°C) 75
Electric heater (kW) 2.7
Height (mm) 1,090 1,474 2,040
Diameter (mm) 550
Material Stainless steel
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Hydro Unit Installation Manual
EN
2Accessory parts
No. Parts name Quantity
1 Installation Manual (this document) 1
2 Owner’s Manual 1
3
Insulator for cooling
5
Insulator
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Hydro Unit Installation Manual
3Preparations for installation
Parts required to connect this product (Common items)
Options required for each function
Optional parts
Use specified products for the outdoor unit, Hydro Unit, and hot water cylinder.
Do not use commercially available products.
Use parts that conform to prescribed specifications for parts to be connected to the Hydro Unit.
If unspecified products or parts are used, a malfunction, failure or fire may be caused.
Category Part Specification Quantity
(8,14 kW) (4.5 kW)
Water piping
Strainer (water filter) 1 1/4" 30 to 40 meshes 1" 30 to 40 meshes 1
Drain cock (for water charge) 1
Isolating ball valves 1 1/4"
for service 1 1/4" 1" for service 1" 2
Electrical system
Earth leakage breaker for main power supply 30 mA 1
Earth leakage breaker for backup heater 30 mA 1
(Option)
Earth leakage breaker for hot water cylinder
heater 30 mA 1
Purpose In the Hydro Unit Purchased part
Part name Model name Part name Prescribed specification
Heating – – Radiator(s), Fan coil(s), Under
floor heating
Heating &Cooling (all
rooms) – – Fan coil(s)
Heating & Cooling
(partly heating only) ––
Motorized 2-way valve (for
cooling) Refer to “Control parts specifications” on page 22.
Hot water supply
Hot water cylinder
Motorized 3-way valve
Earth leakage breaker Refer to “Control parts
specifications” on page 22.
150 L HWS-1501CSHM3-E
HWS-1501CSHM3-UK
210 L HWS-2101CSHM3-E
HWS-2101CSHM3-UK
300 L HWS-3001CSHM3-E
HWS-3001CSHM3-UK
2-zone control – –
Motorized mixing valve Refer to “Control parts
specifications” on page 22.
Circulator pump Other power supply
Buffer tank
Interlocking with boiler Output control board
kit (1) TCB-PCIN3E Boiler Other power supply.
Signal 12 V input function is
required for boiler.
No. Part name Model name Application Remarks
1 External output board TCB-PCIN3E
Boiler-linked output, Alarm output Up to two boards (according to
applications)
Defrost signal output, compressor operation signal
output
2 External input board TCB-PCMO3E Cooling/heating thermostat input Up to two boards (according to
applications)
Emergency stop signal input.
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Hydro Unit Installation Manual
EN
4Precautions for safety
General safety precautions
Ensure that all Local, National and International regulations are satisfied.
• Read the “Precautions for safety” carefully before installation.
• The precautions described below include the important items regarding safety – Observe
them without fail.
• After the installation work has been completed, perform a test run to check for any problems.
Follow the Owner’s Manual to explain how to use and maintain the unit to the customer.
• Turn off the main power supply switch (or breaker) before unit maintenance.
• Ask the customer to keep the Installation Manual along with the Owner’s Manual.
Refrigerant precautions
• If a refrigerant leak is suspected contact the dealer who supplied the system, in the case of a
recharge of refrigerant ask service personnel for details of the leak and confirmation of the
repairs completed.
The refrigerant used in the system is harmless.
• Generally the refrigerant does not leak, however, if the refrigerant should leak into a room and
a heater or stove burner in the room is lit, toxic gas may be generated.
• Do not install the system in a location subject to a risk of exposure to a combustible gas.
If a combustible gas leaks and stays around the unit a fire may occur.
• Install the refrigerant pipe securely during installation and before operation.
If the compressor is operated with no pipe work connected and valves open the compressor
will suck air which would result in over pressurization of the system which may result in
bursting or injury.
Observe the same precautions for refrigerant recovery work (pump back procedure to outdoor
unit) and do not disconnect pipe work until refrigerant is recovered and valves closed.
WARNING
Installation precautions
• Ask an authorized dealer or qualified installation professional to install/maintain the Air to
Water Heat Pump System.
Inappropriate installation may result in water leaks, electric shock or fire.
• Electrical work must be performed by a qualified electrician in accordance with the installation
manual.
An inappropriate power supply capacity or installation may result in fire.
• When completing any electrical works to the system ensure that all Local, National and
International regulations are satisfied.
Inappropriate grounding may result in electric shock.
• Ensure all electrical cables, used for the ESTIA installation, comply with all Local and National
regulations. Check all electrical terminations are secure and tight.
• Earth wire connections.
• Install an earth leakage breaker without fail.
Incomplete grounding can cause electric shock.
Do not earth wires to gas pipes, water pipes, lightning rods or telephone cable earth wires.
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Hydro Unit Installation Manual
• This unit must be connected to the main power supply using a circuit breaker or switch with a
contact separation of at least 3 mm.
• Be sure to turn off all main power supply switches or the circuit breaker before starting any
electrical work.
Ensure all power switches are off, failure to do so can cause electric shock.
Use an exclusive power circuit for the Air to Water Heat Pump system using the rated voltage.
• Ensure correct connection of interconnecting wire between Outdoor Unit and Hydro Unit.
Incorrect connection of the interconnecting cable may result in the damage of electrical parts.
• Ensure refrigeration system remains sealed to external gases and air.
Should air or other gases contaminate the refrigeration circuit, high system pressures could
result in burst pipes and injuries.
• Do not modify or bypass any of safety guards or switches in this system.
• After unpacking the outdoor unit, examine the unit carefully for any possible damage.
• Do not install in any place that might increase the vibration of the unit.
• To avoid personal injury (with sharp edges), be careful when handling parts.
• Perform installation work properly in accordance with the installation manual.
Inappropriate installation may result in water leaks, electric shock or fire.
• Tighten all flare nuts with a torque wrench in the specified manner.
Excessive tightening of the flare nut may result in cracking of the pipe work or flare nut which
may result in a refrigerant leakage.
• Wear heavy duty gloves during installation work to avoid injury.
• Install the outdoor unit securely in a location where the base can sustain the weight
adequately.
• In enclosed areas, if the refrigerant leaks during installation vacate and ventilate immediately.
• After installation is complete ensure and confirm that refrigerant does not leak.
If refrigerant leaks into a room and flows near a fire source noxious gas may be generated.
• Do not block any drain hoses. Hoses may come off and electric shocks may occur.
• Do not hit the manometer, because it is made of glass. It is breakable.
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Hydro Unit Installation Manual
EN
Notes on system design
• The inlet water temperature to the Hydro Unit must be 55 °C or less.
Especially, be careful when there is an external heating source such as a boiler.
When hot water over 55 °C returns, it may result in a failure of the unit or water leakage.
• The flow rate of the circulating water must meet the following range.
14 kW 18 L/minute or more
8 kW 13 L/minute or more
4.5 kW 10 L/minute or more
If the flow rate becomes less than the minimum, the protective device is activated to stop the
operation.
To ensure the minimum flow rate of the water system, install a bypass valve on one water
circuit. Please note this circuit must contain a minimum of 20 liters. If total water amount is not
enough, the unit may not function fully due to protective operation.
• Do not drive water by power other than the pump built in the Hydro Unit.
• The back up heaters, in the hydro unit, are designed to assist the heat pump during periods
of low ambient conditions.
• Ensure the Hydro unit and the connecting water pipes are installed in a location that is not
exposed to low ambient temperatures which could result in the water circuit freezing.
• The system operation is designed around a closed water circuit. Do not use an open circuit
design.
• Please turn on the main power supply to up to 12 hours before the start of the operation, and
don’t turn off the power all the time during the period of use.
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Hydro Unit Installation Manual
5Example of Hydro Unit installation
Example of installation for cooling and heating
When both cooling and heating modes are required a 2-way valve must be installed to isolate the radiator or under-
floor heating circuit.
▼Fig. 5-01
TTW
M
M
M
Fan Coil Units
(Cooling or Heating)
Isolating
Ball
Valves
Strainer (40 mesh / 0.4 mm) Diverting 3-Way
Valve for
Sanitary Hot
Water Cylinder
Radiators (Heating Only)
[2-Way Valve Control]
2-Way
Valve
2-Way
Valve
Alternative to Radiators
Under-floor Heating
(Heating Only)
[2-Way Valve Control]
Indirect Sanitary
Hot Water Cylinder
Drain Cock for water
Charge and Drain
Use the 2-
way valve to
isolate the
heating
circuit when
in cooling
mode.
Use it when do not
operate cooling.
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Hydro Unit Installation Manual
EN
Example of 2-zone temperature control and hot water supply
system
The following shows an example of the 2-zone temperature control.
A buffer tank and a water pump are required for the 2-zone temperature control.
▼Fig. 5-02
M
M
M
TTW
TFI
TRV
TRV
Temp.
Regulating
Valve
(Mechanical)
Isolating
Valves
(Service)
Strainer (40 mesh / 0.4 mm)
Diverting
3-Way
Valve for
Sanitary
Hot
Water
Cylinder
Drain Cock for water
Charge and Drain
Zone 1
Fan Coil Unit (Heating
or Cooling)
Temperature
Regulating
Valve
(Mechanical)
Hi-Pressure
By-Pass
Valve
Indirect Sanitary Hot
Water Cylinder
Mixing 3-Way
Valve for Under
Floor Heating
External Pump for
Under Floor Heating
Motorized 2-Way Valve
is required if fan coil
units are in cooling
operation.
Direct Buffer tank for
Under Floor Heating Zone 2
Under-floor Heating
(2-Way Valve Control)
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Hydro Unit Installation Manual
6Main components of Hydro Unit
Exploded view and description for Hydro Unit
▼Fig. 6-01
1 : Expansion vessel
2 : Temperature sensor (for Heat pump outlet -TWO)
3 : Pressure sensor
4 : Heat exchanger
5 : Flow switch (10 L/min (4.5 kW), 13 L/min (8 kW), 18 L/min (14 kW))
6 : Temperature sensor (for refrigerant -TC)
7 : Temperature sensor (for water inlet -TWI)
8 : Drain nipple
9 : Water inlet connection
10 : Refrigerant liquid connection
11 : Air relief valve
12 : Overpressure preventive valve (0.43 MPa (4.3 bar))
13 : Thermal protector (auto)
14 : Temperature sensor (for water outlet THO)
15 : Thermal protector (Single operation)
16 : Water pump
17 : Backup heater (3 kW, 3 kW x 2, 3 kW x 3)
18 : Manometer
19 : Water outlet connection
20 : Refrigerant gas connection
21 : Pressure switch (4.15 MPa)
5
10
12
8
9
6
7
3
2
1
21
19
20
14
16
18
17
15
13
11
4
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Hydro Unit Installation Manual
EN
E-box layout
▼Fig. 6-02
External output
P.C. board MCC-
1217 (Option)
External output
P.C. board MCC-
1217 (Option)
Relay P.C. board
MCC-1431
MG-SW (RY04)
MG-SW (RY02)
External input
P.C. board MCC-
1214 (Option)
Main P.C. board
MCC-1511
Trans
former
Relay
(RY06)
MG-SW (RY05) Relay
(RY01)
Relay
(RY03)
Fuse
Fuse
(
F9 F10 )
TB 07
TB07
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Hydro Unit Installation Manual
7Hydro Unit
installation
WARNING
• To protect yourself from injury, always use PPE
(Personal Protective Equipment), that is, wear gloves.
• Install the Hydro Unit by at least two persons.
• Install the Hydro Unit in a place strong enough to
withstand the following weights:
Hydro Unit weight with no water 49 kg (8 kW) 52 kg
(14 kW) 47 kg (4.5 kW)
Hydro Unit weight with full water 69 kg (8 kW) 72 kg
(14 kW) 67 kg (4.5 kW)
CAUTION
• Do not install the unit in a place where water freezes.
• Do not install the Hydro Unit in a place where
combustible gas may leak.
• Do not install the Hydro Unit in a place exposed to rain
or water.
• Do not install the Hydro Unit near equipment which
generates heat.
• Do not install the Hydro Unit to a movable object.
• Do not install the Hydro Unit in a place exposed to
vibration.
• The unit must be installed in accordance with national
wiring regulation.
• The Hydro Unit must not be installed in a high humidity
condition area.
Handling, unpacking, and
checking the Hydro Unit
• The unit should be checked when it is delivered, and
any damage reported immediately to the courier
claims the department.
Positioning
Service space
Secure a service space for the Hydro Unit.
• Do not install the Hydro Unit in a place where heat
stagnates.
▼Fig. 7-01
Mounting
Install M10 bolts at the positions shown below and
secure them with nuts.
▼Fig. 7-02
NOTE
If customer worried about vibration of ESTIA, please
insert vibration isolating material between the product
and the wall, when installing the product.
200 mm
100 mm
500 mm
350 mm
500 mm
380 mm
960 mm
M10
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Hydro Unit Installation Manual
EN
The Hydro Unit can be installed directly without using
the fixing angles.
However, the back side of the Hydro Unit can be highly
heated, therefore, the installing surface must be heat-
resistant.
▼Fig. 7-03
Install the Hydro Unit so that its tilting angle falls within
the range below.
Refrigerant piping
WARNING
• THIS SYSTEM ADOPTS HFC REFRIGERANT
(R410A) WHICH DOES NOT DESTROY THE
OZONE LAYER.
• The characteristics of R410A refrigerant are: ease to
absorb water, oxidizing membrane or oil, and its
pressure is approximately 1.6 times higher that of
R22. Accompanied with the new refrigerant the oil has
also been changed. Therefore during installation work
prevention of the invasion of water, dust, former
refrigerant or oil is of a paramount importance.
To prevent the charging of incorrect refrigerants into
the system the service valve connection ports have
also increased in size.
• The use of R410A tools is required for correct
installation of the system.
• The use of the correct pipe sizes and wall thicknesses
of copper pipe work is required for the correct
installation of the system.
CAUTION
• Ensure all refrigerant pipes are protected from the
invasion of dust and water.
• Ensure all pipe work connections are tightened to the
required torque settings detailed in this section.
• Perform an air tight using Oxygen Free Nitrogen
(OFN) only.
• Evacuate the air in the pipe work using a vacuum
pump.
• Check for refrigerant gas leaks at all connections
throughout the pipe work.
NOTE
The Air to Water Heat Pump system uses R410A
refrigerant. It is important that copper pipes used for
refrigerant piping have the following wall thickness:
• 0.8 mm for Ø6.4 mm, Ø9.5 mm and Ø12.7 mm
• 1.0 mm for Ø15.9 mm
Remove the M5a screws to
detach the fixing angles.
380
860
M10
M10
Secure the Hydro Unit with
plain washers and nuts.
▼Fig. 7-04 ▼Fig. 7-05
± 1°
▼Fig. 7-06
± 1°
▼Fig. 7-07
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Hydro Unit Installation Manual
Refrigeration pipe
The length and height of the refrigeration pipe must be
within the following values.
As long as the Hydro Unit is installed within these
ranges, no additional refrigerant is required.
▼Fig. 7-08
Refrigerant pipe sizes
Flaring
• Cut the refrigerant pipes to the correct length using a
pipe cutter. Remove any burrs that may be on the
pipes as these may cause refrigerant leaks or
component failure in the refrigeration cycle.
• Place the correct size flare nuts onto the pipes (use
the flare nuts supplied with the Hydro Unit or use
flare nuts designed specifically for R410A
refrigerant) and then flare the pipes using the correct
flaring tool.
Tightening
• Connect the refrigerant pipes, from the outdoor unit,
to the Hydro Unit as shown below.
▼Fig. 7-09
• Align the flare connection on each pipe with the
corresponding outlet connection on the Hydro Unit.
Tighten the flare nuts, using fingers, to secure the
pipes in place.
• Tighten the flare nuts, using a torque wrench, to the
tightening torques shown below:
• To prevent damage, to the refrigerant pipes, use two
spanners to tighten the flare nut connections to the
required torque.
Water pipe
WARNING
• Install water pipes according to the regulations of
respective countries.
• Install water pipes in a freeze-free place.
• Make sure that water pipes have sufficient pressure
resistance.
The setting value of the overpressure preventive valve
is 0.43 MPa. (4.3 bar)
CAUTION
• Do not use zinc plated water pipes. When steel pipes
are used, insulate both ends of the pipes.
• The water to be used must meet the water quality
standard specified in EN directive 98/83 EC.
Hydro Unit
Model H:Max L:Max L:Min
4.5 kW
Hydro Unit ±10 m (above or below) 15 m 5 m
8 & 14 kW
Hydro Unit ±30 m (above or below) 30 m 5 m
Hydro Unit Model Gas Side (mm) Liquid Side
(mm)
4.5 kW Hydro Unit Ø 12.7 Ø 6.35
8 & 14 kW Hydro Unit Ø 15.88 Ø 9.52
H
L
Outdoor unit
Outer Ø of Copper Pipe
(mm) Tightening Torque (N/m)
Ø 6.35 14 to 18
Ø 9.52 33 to 42
Ø 12.7 50 to 62
Ø 15.88 63 to 77
Liquid line
Gas line
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Hydro Unit Installation Manual
EN
Water pipe
Design the water pipe length within the QH
characteristics of the pump (Refer to “Fig. 7-16-1”
“Fig. 7-16-2” and “Fig. 7-17” on page 18).
The height of the pipe must be 7 m or less.
▼Fig.7-10
Water circuit
• Install a strainer with 30 to 40 meshes (locally
procured) at the water inlet of the Hydro Unit.
• Install drain cocks (locally procured) for water charge
and discharge at the lower part of the Hydro Unit.
• Make the piping route a closed circuit. (An open
water circuit may cause a failure.)
▼Fig. 7-11
▼Fig. 7-12
H < 7 m
Hot water outlet
connection
Water inlet connection
Attention
To avoid water leak,
exchange the seal
tapes to new one.
Attention
Water (used at test
in factory before
shipping) may be
found in the caps.
Local arrangement
Isolating Ball Valve
Strainer (30 to 40
meshes)
Drain cock for
water charge
and discharge
Inlet
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Hydro Unit Installation Manual
Piping to hot water cylinder (option)
Water supplied to the hot water cylinder is branched by
a motorized 3-way valve (locally procured).
For the specifications of the motorized 3-way valve,
refer to “Control parts specifications” on page 22.
Connect the hot water cylinder to port A (open when
energized) of the valve.
▼Fig. 7-13
Piping to 2-zone operation
To perform 2-zone temperature control, circulate water
by another pump (locally procured) through a
motorized mixing valve (locally procured) and a buffer
tank (locally procured).
For the specifications of the motorized mixing valve,
Refer to “Control parts specifications” on page 22.
▼Fig. 7-14
Checking water volume and initial pressure
of expansion vessel
The expansion vessel of the Hydro Unit has a capacity
of 12 liters.
The initial pressure of the expansion vessel is
0.15 MPa (1.5 bar).
The pressure of the safety valve is 0.43 MPa (4.3 bar).
Verify whether the capacity of the expansion vessel is
sufficient using the following expression. If the volume
is insufficient, add the capacity locally.
Expression for expansion vessel selection
V: Necessary total tank capacity ( )
: Water expansion coefficient at each hot water
temperature
Vs: Total water amount in the system
P1: System pressure at tank setting position
(MPaabs.)
= water supply pressure = 0.3 (MPaabs.)
(recommended valve)
P2: Maximum pressure used during operation at tank
setting position (MPaabs.)
= safety valve setting pressure = 0.4 (MPaabs.)
* The absolute pressure value (abs.) is obtained by
adding the atmospheric pressure (0.1 MPa (1 bar))
to the gauge pressure.
▼Tank selection method
▼Fig. 7-15
Install an external expansion vessel when the capacity
of the expansion vessel is insufficient.
A
B
AB
to hydro unit
room heating or cooling to hot water cylinder
Open when de-
energized Open when energized
A
B
AB
Motorized mixing valve
(locally procured) from hydro
unit
Buffer tank (locally
procured)
Zone
2
Water pump
(locally procured)
to hydro unit
Water temperature and expansion coefficient
Hot water
temperature
(°C)
Expansion
rate
Hot water
temperature
(°C)
Expansion
rate
0 0.0002 50 0.0121
4 0.0000 55 0.0145
5 0.0000 60 0.0171
10 0.0003 65 0.0198
15 0.0008 70 0.0229
20 0.0017 75 0.0258
25 0.0029 80 0.0292
30 0.0043 85 0.0324
35 0.0050 90 0.0361
40 0.0078
45 0.0100
0
2
4
6
8
10
12
14
16
18
0 50 100 150 250200 300
*In case the maximum hot water temperature is 60ºC
V: Necessary total tank capacity( )
Vs: Total water amount in the system( )
17-EN

–18–
Hydro Unit Installation Manual
EN
Pump operation/configuration
0 5 10 15 20 25 30 35
0
1
2
3
4
5
6
7
8
9
10
Hydraulic heat exchanger (4.5 kW) QH characteristics
Minimum flow rate
Head [m]
Out of range
Hydro unit QH-
Characteristics (220/230 V)
Pump duty
100%
Pump duty
60%
Pump duty
80%
Flow rate [L/min]
▼Fig. 7-16-1
0 5 10 15 20 25 30 35
0
1
2
3
4
5
6
7
8
9
10
Hydraulic heat exchanger (8 kW) QH characteristics
Minimum flow rate
Head [m]
Out of range
Hydro unit QH-
Characteristics (220/230 V)
Pump duty
100%
Pump duty
60% Pump duty 80%
Flow rate [L/min]
▼Fig. 7-16-2
0
1
2
3
4
5
6
7
8
9
10
01020304050
Head [m]
Hydraulic heat exchanger (14 kW) QH characteristics
Minimum flow rate
Hydro unit QH-
Characteristics (220/230 V)
Out of range Pump duty
100%
Pump duty
60%
Pump duty
80%
Flow rate [L/min]
▼Fig. 7-17
18-EN

–19–
Hydro Unit Installation Manual
Water charging
Charge water until the pressure gauge shows
recommended valve 0.2 MPa (2 bar).
Hydraulic pressure may drop when the trial run begins.
In that case, add water.
Air may enter if the charged hydraulic pressure is low.
Loosen the purge valve cap by two turns to release air.
▼Fig. 7-18
Loosen the air vent screw of the pump, pull out air in
the pump, and tighten again.
Loosen the cap of the pressure relief valve to release
air.
Water may come out of the pressure relief valve.
Release the air completely from the water circuit.
Failure to do so may disable correct operation.
Water quality
The water used must satisfy EN directive 98/83 EC.
Piping insulation
It is recommended that insulation treatment be applied
to all pipes. To perform optional cooling operation,
apply insulation treatment of 20 t or more to all pipes.
Electrical installation
WARNING
• Ensure electrical circuits are isolated before
commencing the electrical installation.
• The electrical installation must be completed by a
qualified electrician.
• The electrical installation must comply to all Local,
National and International electrical installation
regulations.
• This product must be earthed in accordance with
Local, National and International electrical installation
regulations.
CAUTION
• The Hydro Unit must be connected to a dedicated
power supply for the back up heater circuit.
• The electrical supply must be protected by a suitably
sized over current protection device (fuse, MCB etc)
and an earth leakage protection device.
• The Hydro Unit must be connected to the mains power
supply using a isolating switch which disconnects all
poles and has a contact separation of at least 3 mm.
• The cord clamps, attached to the Hydro Unit, must be
used to secure the electrical cables.
• Wrong connection of electrical cables may result in
electrical component failure or fire.
• Ensure the electrical cables are sized in accordance
with the installation instructions.
Loosen 2 turns for
proper venting
* Purge valve cap faces the front as factory default.
* The direction purge valve cap may change during
transportation.
19-EN