Toshiba HWT-601F21SM3W-E User manual

Hydro Unit -All In One Type-
Model name:
HWT-601F21SM3W-E
HWT-601F21ST6W-E
HWT-1101F21SM3W-E
HWT-1101F21MM3W-E
HWT-1101F21ST6W-E
HWT-1101F21MT6W-E
HWT-1101F21ST9W-E
HWT-1101F21MT9W-E
AIR TO WATER HEAT PUMP
Installation Manual R32
English

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Hydro Unit Installation Manual
Original instructions
Contents
1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Accessory parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3 Preparations for installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
4 Precautions for safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
5 Example of Hydro Unit installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
6 Main components of Hydro Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7 Hydro Unit installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8 Group control and optional controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
9 Start up and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
10 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
11 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
12 Technical parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
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.
• This system is for residential use only.
REFRIGERANT
This Air to Water Heat Pump uses an HFC refrigerant (R32) in order to prevent destruction of the ozone layer.
1General information
■System combination
■General specifications
Outdoor Unit
Single Phase model
Outdoor Unit
Hydro Unit HWT-
401HW-E
HWT-
601HW-E
HWT-
801HW-E
HWT-
1101HW-E
HWT-
801HRW-E
HWT-
1101HRW-E
Backup
heater
Zone2
Control
HWT-601F21SM3W-E – – – – ~, 3kW –
HWT-601F21ST6W-E – – – – 3N ~, 6kW –
HWT-1101F21SM3W-E – – ~, 3kW –
HWT-1101F21MM3W-E – – ~, 3kW
HWT-1101F21ST6W-E – – 3N ~, 6kW –
HWT-1101F21MT6W-E – – 3N ~, 6kW
HWT-1101F21ST9W-E – – 3N ~, 9kW –
HWT-1101F21MT9W-E – – 3N ~, 9kW
Single phase model Single phase with Cord
Heater
Outdoor Unit HWT-401HW-E HWT-601HW-E HWT-801HW-E HWT-1101HW-E
Power supply 220-240 V ~ 50 Hz
Type INVERTER
Function Heating & Cooling
Heating
Capacity (kW) 4.0 6.0 8.0 11.0
Input (kW) 0.77 1.25 1.54 2.39
COP (W/W) 5.20 4.80 5.19 4.60
Cooling
Capacity (kW) 4.0 5.0 6.0 8.0
Input (kW) 1.16 1.52 1.88 2.86
EER (W/W) 3.45 3.30 3.20 2.80
Refrigerant R32
Dimension H x W x D (mm) 630 x 800 x 300 1,050 x 1,010 x 370
Outdoor Unit with Cord heater
HWT-801HRW-E HWT-1101HRW-E
Power supply 220-240 V ~ 50 Hz
Type INVERTER
Function Heating & Cooling
Heating
Capacity (kW) 8.0 11.0
Input (kW) 1.54 2.39
COP 5.19 4.60
Cooling
Capacity (kW) 6.0 8.0
Input (kW) 1.88 2.86
EER 3.20 2.80
Refrigerant R32
Dimension HxWxD (mm) 1,050 x 1,010 x 370
Cord heater (W) 150
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Hydro Unit Installation Manual
Hydro Unit
4 kW, 6 kW model
8 kW, 11 kW model
Hydro Unit HWT-601F21SM3W-E HWT-601F21ST6W-E
Back up heater capacity (kW) 3.0 6.0
Power supply for back up heater 220-240 V ~ 50 Hz 380-415 V 3N ~ 50 Hz
Leaving water
temperature
Heating (°C) 20-55
Cooling (°C) 7-25
Max water temperature for DHW (°C) 65
Dimension H x W x D (mm) 1,700 x 600 x 670
Volume DHW tank (L) 210
Pressure setting, DHW safety valve (MPaG) 0.6
Pressure setting, Space heating safety valve (MPaG) 0.25
Hydro Unit HWT-1101F21SM3W-E
HWT-1101F21MM3W-E
HWT-1101F21ST6W-E
HWT-1101F21MT6W-E
HWT-1101F21ST9W-E
HWT-1101F21MT9W-E
Back up heater capacity (kW) 3.0 6.0 6.0
Power supply for back up heater 220-240 V ~ 50 Hz 380-415 V 3N ~ 50 Hz 380-415 V 3N ~ 50 Hz
Leaving water
temperature
Heating (°C) 20-65
Cooling (°C) 7-25
Max water temperature for DHW (°C) 65
Dimension H x W x D (mm) 1,700 x 600 x 670
Volume DHW tank (L) 210
Pressure setting, DHW safety valve (MPaG) 0.6
Pressure setting, Space heating safety valve (MPaG) 0.25
2Accessory parts
No. Parts name Quantity
1 Installation Manual (this document) 1
2 Owner’s Manual 1
3CD 1
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Hydro Unit Installation Manual
3Preparations for installation
■Parts required to connect this product (Common items)
■Options required for each function
Category Part Specification Quantity
Water piping
Drain cock (for water charge) 1
Isolating ball valves 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
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 13.
Interlocking with boiler – – Boiler
Other power supply.
Signal 12 V input function is
required for boiler.
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.
• 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.
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Hydro Unit Installation Manual
• 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.
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 Hydro Unit 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.
• 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.
WARNING
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Hydro Unit Installation Manual
• Under no circumstances must the power cable be extended.
Poor connections, where the cables are joined, may give rise to
smoking and/or fire.
• 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 the Hydro Unit.
• Due to the heavy weight of the unit, please ensure appropriate
levels of care, is taken when moving and positioning the unit into
its final location.
• 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.
• Install in room with water drain.
• This appliance is intended to be permanently connected to the
water mains and not connected by a hose set.
• The maximum inlet water pressure for DHW is 0.6 MPa.
• The maximum inlet water pressure for space heating is 0.25 MPa.
• The minimum inlet water pressure for space heating is 0.05 MPa.
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Hydro Unit Installation Manual
■Notes on system design
• The inlet water temperature for space heating to the Hydro Unit for
HWT-110 must be 65 °C or less. (For HWT-60 must be 55 °C or
less.)
Especially, be careful when there is an external heating source
such as a boiler.
When hot water over 65 °C or 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.
11 kW 13 L/minute or more
6 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 and during
domestic hot water (DHW) production.
• 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
system is started and ensure the power remains switched on for
the period of use.
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
Fan Coil Units
(Cooling or Heating)
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.
Isolating
Ball Valves
M
M
TTW
M
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Hydro Unit Installation Manual
■Example of 2-zone temperature control and hot water supply
system
The following shows an example of the 2-zone temperature control.
▼Fig.5-02
Drain Cock for water
Charge and Drain
M
M
TFI
M
TTW
TRV
TRV
Isolating
Ball Valves
Strainer (40 mesh / 0.4 mm)
Indirect Sanitary
Hot Water Cylinder
Zone 2
Under-floor Heating
(2-Way Valve Control)
Motorized 2-Way Valve is required if fan coil units are in cooling
operation.
In case of that the water circuit of 2nd pump is dead end, set
DN64 to "1". Pump 2 operation can be stopped during cooling .
Zone 1
Fan Coil Unit (Heating
or Cooling)
Temp.
Regulating
Valve
(Mechanical)
Temperature
Regulating
Valve
(Mechanical)
Hi-Pressure
By-Pass
Valve
6Main components of Hydro Unit
■Exploded view and description for Hydro Unit
▼Fig.6-01
19 20 22 21 9 10 25 26
6
16
14
17
13 29
18
16
7
1
15
12
2
23
5
3
4
11
24
8
1 : Expansion vessel
2 : Temperature sensor (for Heat pump outlet -TWO)
3 : Pressure sensor
4 : Heat exchanger
5 : Flow sensor
6 : Temperature sensor (for refrigerant -TC)
7 : Temperature sensor (for water inlet -TWI)
8 : Drain
9 : Refrigerant gas connection
10 : Refrigerant liquid connection
11 : Air vent valve
12 : Overpressure preventive valve (0.25 MPaG (2.5 barG))
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 inlet connection (for Domestic Hot water)
20 : Water outlet connection (for Domestic Hot water)
21 : Water inlet connection (for Zone1)
22 : Water outlet connection (for Zone1)
23 : Three - way valve
24 : Mixing valve
25 : Water inlet connection (for Zone2)
26 : Water outlet connection (for Zone2)
27 : Temperature sensor (for Water outlet to Zone2 -TFI)
28 : Safety group, DHW
29 : Cable channel, Power cables
30 : Cable channel, Low voltage cables
28
27
30
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Hydro Unit Installation Manual
■E-box layout
▼Fig.6-02
CN21
TB03
CN22
CN23
TB04
TB01
Digital input terminals
Back up heater power
supply connection
Digital output terminals
230 VAC 50 Hz output
terminals
Second remote
controller terminal
connection
Hydro unit power
supply connection
7Hydro Unit
installation
WARNINGWARNING
• To protect yourself from injury, always use PPE
(Personal Protective Equipment), that is, wear gloves.
• Install the Hydro Unit by at least four persons.
• Install the Hydro Unit in a place strong enough to
withstand the following weights:
The dry weight of the Hydro Units displayed on the
product nameplate. When the Hydro Unit, is filled with
water the weight of the unit will increase by 210 kg.
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.
• Must be installed accordance with national plumbing
regulation.
■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 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
Front view
200 mm
20-30 mm
800 mm
Top view
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Hydro Unit Installation Manual
Install the Hydro Unit so that its tilting angle falls with in
the range below by use of the four adjustable feet.
■Refrigerant piping
WARNINGWARNING
• THIS SYSTEM ADOPTS HFC REFRIGERANT (R32)
WHICH DOES NOT DESTROY THE OZONE LAYER.
• 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 R32 or 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 test 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 R32
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
▼Fig.7-02 ▼Fig.7-03
1°
± 1°
Back Front
Side Side
Adjustable feet
Refrigeration pipe
The length and height of the refrigeration pipe must be
within the following values.
▼Fig.7-04
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 R32 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.7-05
• 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.
Hydro Unit
Model H:Max L:Max L:Min
HWT-60 ±30 m
(above or below) 30 m 5 m
HWT-110 ±30 m
(above or below) 30 m 5 m
Hydro Unit Model Gas Side (mm) Liquid Side
(mm)
HWT-60 Ø 12.7 Ø 6.35
HWT-110 Ø 15.88 Ø 6.35
L
Outer Ø of Copper Pipe
(mm) Tightening Torque (N/m)
Ø 6.35 14 to 18
Ø 12.7 50 to 62
Ø 15.88 63 to 77
Liquid line
Gas line
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Hydro Unit Installation Manual
■Water pipe
WARNINGWARNING
• 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 0.25 MPaG (2.5 barG).
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.
Water pipe
• Design the water pipe length within the QH
characteristics of the pump (Refer to “Fig.7-10” and
“Fig.7-11” on page 11).
The height of the pipe must be 7 m or less.
• Connections Ø22 compression fitting.
▼Fig.7-06
▼Fig.7-07
▼Fig.7-08
H < 7 m
Cold domestic water in
Hot domestic water flow
Zone 1 heating flow
Zone 1 heating return
Zone 2 heating return
Zone 2 heating flow
Drain
Ø 22 Ø 22 Ø 22 Ø 22 Ø 22 Ø 22
Water circuit - Space heating
• Install drain cocks (locally produced) for water charge and discharge. Alternatively, use the water charge valve
inside the unit.
• Make the piping route a closed circuit (An open circuit may cause failure).
• The AIO has two built-in manual air relief valves for start-up purposes. It is recommended to install automatic
deaerators on appropriate locations in the associated pipe works.
Water circuit - Domestic water
• Connect the cold water inlet to the cold water supply. The AIO has a build in safety group.
• The safety group has a pressure relief valve/safety valve right before the domestic hot water tank inlet to protect
the water tank and associated pipe work against excessive pressures when the domestic water expands during
the heating process.
The back pressure valve (check valve), which is installed in front of the pressure relief valve, prevents water from
the tank flowing back into the cold water pipe. Therefore, the pressure in the water tank rises to the maximum
setting of the pressure relief valve and the pressure relief valve opens. The redundant water discharges.
If the pressure relief valve did not open, the water tank would burst.
The pressure relief valve must be operated regularly to remove lime scale/deposits and to verify that it is not
blocked. It is tested by turning the handle on the pressure relief valve while checking that water discharges.
Damages due to a faulty pressure relief valve are not covered by the warranty.
Please note that water may drip from the discharge pipe of the pressure-relief valve due to heating of the water.
This water collects into the AIO common drain funnel.
Unit drainage
• The AIO has a combined drain funnel (Refer to “Fig.6-01(8)”), collecting drain from the domestic water safety
group, the space heating safety group, and the space heating air relief valves.
• Install a drain pipe from the drain funnels to a building drain.
• Always ensure free drainage and no locks on the drain pipe.
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Hydro Unit Installation Manual
Checking water volume and initial pressure
of expansion vessel for Heating
The expansion vessel of the Hydro Unit has a capacity
of 10 liters.
The initial pressure of the expansion vessel is
0.05 MPa (0.5 bar).
The pressure of the safety valve is 0.25 MPa (2.5 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 = 0.15 (MPaabs.)
(recommended value)
P2: Maximum pressure used during operation at tank
setting position (MPaabs.)
= safety valve setting pressure = 0.35 (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.7-09
Install an external expansion vessel when the capacity
of the expansion vessel is insufficient.
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
0 50 100 150 250200 300
*In case the maximum hot water temperature is 65ºC
V: Necessary total tank capacity
()
Vs: Total water amount in the system ( )
Pump operation/configuration
0
1
2
3
4
5
6
7
8
9
10
0 5 10 15 20 25 30 35 40
Hydraulic heat exchanger (6 kW) QH characteristics
Minimum flow rate
Head [m]
Out of range Hydro unit (AIO ZONE1)
Q-H characteristics
Pump duty
100%
80%
Flow rate [L/min]
▼Fig.7-10
60%
0
1
2
3
4
5
6
7
8
9
10
0 5 10 15 20 25 30 35 40
Hydraulic heat exchanger (11 kW) QH characteristics
Minimum flow rate
Head [m]
Out of range Hydro unit (AIO ZONE1)
Q-H characteristics
Pump duty
100%
80%
Flow rate [L/min]
▼Fig.7-11
60%
0
1
2
3
4
5
6
7
8
9
10
0 5 10 15 20 25 30 35 40
Head [m]
Flow rate [L/min]
Hydro unit (AIO ZONE2)
Q-H characteristics
Pump duty
100%
21-EN 22-EN

– 12 –
Hydro Unit Installation Manual
Water charging - Space heating
Fill the system with water until the pressure gauge
shows the recommended pressure value of 0.15 MPa
(1.5 bar).
Release air from the system by opening the two air
relief valves (Torx 20).
Hydraulic pressure may drop when the trial run begins.
In that case, add water.
Air may enter if the charged hydraulic pressure is low.
Operate the air relief valves until no further air escapes
the system.
Water charging - Domestic water
• Open the cold water inlet to fill up the water cylinder.
Ensure also that the ball valve in the safety group
(Refer to “Fig.6-01(28)”) is open.
• Ensure that a hot water tapping point is open to
deaerate the water cylinder and the associated pipe
works.
▼Fig.7-12
Loosen the air vent valve to release air.
Water may come out of the air vent valve.
Release the air completely from the water circuit.
Failure to do so may disable correct operation.
Air vent
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
WARNINGWARNING
• 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.
• Check that cabling will not be subject to wear,
corrosion, excessive pressure, vibration, sharp edges
or any other adverse environmental effects.
The check shall also take into account the effects of
aging or continual vibration from sources such as
compressor or fans.
23-EN 24-EN

– 13 –
Hydro Unit Installation Manual
Control line
▼Fig.7-13
▼Fig.7-14
1
2
3
4
5
6
789
10
13462356
CN23
CN22
8
9
10
CN22
Max 12 m
230 V 100 mA
0.75 mm² or more
Booster heater* Max 12 m
230 V 1 A
0.75 mm² or more
Alert output* Boiler operation* Defrost output* Compressor
operation output*
Max 12 m non
voltage 0.75 mm² or
more
2Way-Valve for
cooling stop
3Way-Valve for hot
water cylinder
* Locally procured
Input power
220-240 V ~ 50 Hz
Input power
380-415 V
3N ~ 50 Hz
to Outdoor
Unit
to Second remote
controller
Backup heater power
supply
TB03 TB03 TB01 TB04
Electrical supply/cable specifications
▼Wiring specifications
▼Wiring specifications (control line)
▼Control parts specifications
▼Output line specifications
▼Input line specifications
CAUTION
Earthing arrangements
The Hydro Unit and related equipment must be earthed in accordance with your local and national electrical regulations.
It is essential that the equipment is earthed to prevent the electric shock and damage to the equipment.
Description Model name
HWT-
POWER
SUPPLY
Maximum
current
Installation
fuse rating Power wire Connection destination
Outdoor
Unit
power
Power
input
1101H(R)W-E 220-240 V
~ 50 Hz 20.3 A 25 A 2.5 mm² or more
,
801H(R)W-E 220-240 V
~ 50 Hz 20.3 A 25 A 2.5 mm² or more
601HW-E 220-240 V
~ 50 Hz 14.6 A 16 A 1.5 mm² or more
401HW-E 220-240 V
~ 50 Hz 14.6 A 16 A 1.5 mm² or more
Hydro
inlet
heater
power
Power
input for
backup
heater
1101F21SM3W-E
1101F21MM3W-E
220-240 V
~ 50 Hz 13 A 16 A 1.5 mm² or more ,
TB03
1101F21ST6W-E
1101F21MT6W-E
380-415 V
3N ~ 50 Hz
13 A
(13 A x 2P) 16 A 1.5 mm² or more , ,
,
1101F21ST9W-E
1101F21MT9W-E
380-415 V
3N ~ 50 Hz
13 A
(13 A x 3P) 16 A 1.5 mm² or more
601F21SM3W-E 220-240 V
~ 50 Hz 13 A 16 A 1.5 mm² or more ,
601F21ST6W-E 380-415 V
3N ~ 50 Hz
13 A
(13 A x 2P) 16 A 1.5 mm² or more , ,
,
Description Line spec Maximum current Maximum
length Power wire Connection destination
Second remote controller 2 line 50 mA 50 m 0.5 mm² or more (TB04)
Group control (total) 2 line 50 mA 50 m 0.5 mm² or more (TB04)
Open protocol interface 2 line 100 mA 50 m 0.5 mm² or more (TB04)
Power Maximum current Type
Motorized 2-way valve
(for cooling) AC 230 V 100 mA spring return type (normally open)
Description Output Maximum
current
Max
voltage
Maximum
length
External boost heater AC230 V 1 A – 12 m Output as required when outdoor air temperature
is -20 °C or less
Digital outputs from CN22 Non-voltage
contacts
0.5 A AC230 V 12 m
1 A DC24 V 12 m
Description Input Maximum length
Digital inputs to CN21 Non-voltage 12 m
25-EN 26-EN

– 14 –
Hydro Unit Installation Manual
Electrical connection to Hydro Unit for
backup heater
• Remove the front cover and the electrical box cover
from the Hydro Unit.
• The Hydro Unit power cable must be sized in
accordance with refer to “Electrical supply/cable
specifications”.
• Connect the Hydro Unit power cable to Terminal 03
as shown below.
• Ensure the Hydro Unit power cable is secured using
the cable clamp fitted in the electrical box.
• Ensure the Hydro Unit power cable connection
terminals are tight.
Outdoor Unit to Hydro Unit electrical
connection
▼Fig.7-16
• Ensure electrical circuits are isolated before
commencing work.
• The Outdoor Unit to Hydro Unit interconnecting
cable must be sized in accordance with refer to
“Electrical supply/cable specifications”.
• Connect the Outdoor Unit to Hydro Unit
interconnecting cable as shown in the diagram
above.
• Ensure the Outdoor Unit to Hydro Unit
interconnecting cable is secured using the cable
clamp fitted in the electrical box.
• Ensure the Outdoor Unit to Hydro Unit
interconnecting cable connection terminals are tight.
L N L1 L2 L3 N
TB03TB03
▼Fig.7-15
Leakage
breaker
30 mA
Leakage
breaker
30 mA
Input power
220-240 V
50 Hz
Backup heater
220-240 V ~ type
(3 kW type)
Backup heater
380-415 V 3N~
type
(6,9 kW type)
Input power
380-415 V
3N ~ 50 Hz
3kW type
TB03
1234
LN
6kW, 9kW type
TB03
1234
L3L2L1 N
N
L
1
3
2
1
3
2
TB01
Leakage
breaker
30 mA
Input
power
220-240 V
~ 50 Hz
Outdoor Unit Hydro Unit
Outdoor Unit
Electrical connection for external booster
heater
CAUTION
• The maximum current available from the
booster heater output is 1 A. Do not connect
the booster heater directly to CN23 on the
Hydro Unit. A separate contactor, supplied
locally, must be used to supply the booster
heater.
• The booster heater can be installed only for room
heating and cannot be used for hot water supply.
The booster heater is an external heater, supplied
locally, used to assist the Hydro Unit during low
ambient conditions.
• The AC230 V 1 A output from the Hydro Unit must only
be used to energize an external contactor. (Supplied
locally)
• The output from the Hydro Unit is only enabled when
the outdoor air temperature is less than -20°C.(*)
• Ensure the external booster heater is installed and set
up in accordance with all Local, National and
International regulations.
(*) For HWT-110, it is less than -25°C.
• Connect the external booster heater to the Hydro
Unit in accordance with the diagram shown below.
• Connect the coil, of the field supplied contactor, to
terminals 5 & 6 on CN23. The contactor will energize
in the event of low ambient conditions.
• A separate dedicated electrical supply must be used
for the external booster heater. This must be
connected through the contacts on the field supplied
contactor.
▼Fig.7-17
To cable channel for power
cables (Refer to “Fig.6-01(29)”)
To cable channel for Low voltage
cables (Refer to “Fig.6-01(30)”)
Power supply & CDU
communication
Digital
output
Second
controller
Digital input
230 V AC output
Power supply for the
backup heater
1234567 8 9
CN23
Booster Heater
27-EN 28-EN

– 15 –
Hydro Unit Installation Manual
Additional Hydro Unit outputs
This unit has four output ports. They are
selectable by DN. Table1 shows the selectable
output functions and default settings.
Volt free contact – specification show below:
AC230 V; 0.5 A (maximum)
DC24 V; 1 A (maximum)
Minimum current; 10 mA
▼Table1
0: Alarm output
Open: No alarm
Close: Alarm
1: Compressor operation output
Open: Compressor is stopping
Close: Compressor is operating
2: Defrost operation output
Open: Unit is not defrost operating
Close: Unit is defrost operating
3: Boiler control output
Open: Normal operation
Close: Boiler operation output
4: During safety or protection control running
Open: Normal operation
Close: Release control running
5: During backup heater running
Open: Backup heater not running
Close: Backup heater running
6: During hot water cylinder heater running
Open: Hot water cylinder heater not running
Close: Hot water cylinder heater running
7: Heating operation output
Open: Not heating operation
Close: Heating operation
(Include HP, Heater and thermo off.)
8: Cooling operation output
Open: Not cooling operation
Close: Cooling operation
(Include HP and thermo off.)
9: Hot water operation output
Open: Not hot water operation
Close: Hot water operation
(Include HP, Heater and thermo off.)
Default setting
O/P 1 (DN: 6CA) Alarm output
O/P 2 (DN: 6CC) Defrost operation output
O/P 3 (DN: 6CD) Boiler control output
O/P 4 (DN: 6CB) Compressor operation output
Selectable output items (DN: 6CA~6CD)
0 Alarm output
1 Compressor operation output
2 Defrost operation output
3 Boiler control output
4 Safety or protection control running
5 During backup heater running
6 During hot water cylinder heater running
7 Heating operation output
8 Cooling operation output
9 Hot water operation output
common line
MCC-1755
O/P 4
common line
CN22
6
5
4
3
2
1
O/P 2
O/P 3
O/P 1
Hydro Unit sub PCB
Locally procured
Optional inputs to Hydro Unit
This unit has eight input ports. 2 ports of them are
selectable by DN. Table2 shows the selectable
input functions and default settings.
Non-voltage contacts
▼Table2
I/P1 & I/P2: Room thermostat input
• Setting : DN [6B3] = 1
• Non-voltage contacts
Thermostat operation
I/P3: Hot water tank thermostat input
• This function is used, when the customer use the
local hot water tank.
• Setting : DN [6B2] = 1
• Non-voltage contacts
Open: Reached setting temperature
Close: Not reached setting temperature
I/P4: Heating/cooling mode switching input
• Non-voltage contact
Open: Heating mode
Close: Cooling mode
I/P5: Heating/cooling operation ON/OFF input
• Non-voltage contact
Open: Operation OFF (Remote controller OFF)
Close: Operation ON (Remote controller ON)
I/P6: Hot water operation ON/OFF input
• Non-voltage contact
Open: Operation OFF (Remote controller OFF)
Close: Operation ON (Remote controller ON)
I/P7 & I/P8: Connection to a Smart Grid network (SG
Ready)
• Non-voltage contacts
• The operating mode is controlled through volt free
contacts incorporated into the energy meter.
• Setting: DN [B6] = 4
0: Open, 1: Close
Input items (Default setting)
I/P 1 Room thermostat input for heating
I/P 2 Room thermostat input for cooling
I/P 3 Hot water tank thermostat input
I/P 4 Heating/cooling mode switching input
I/P 5 Heating/cooling operation ON/OFF
I/P 6 Hot water operation ON/OFF
I/P 7 (DN: B6) 0: Emergency shutdown input
I/P 8 (DN: B6) 0: None
Selectable input items (DN: B6)
DN:
B6 CN21 Item
08-10 Emergency Shutdown input
9-10 None
18-10 TEMPO control input 1
9-10 None
28-10 TEMPO control input 2
9-10 None
3
8-10 Forcibly turn off the backup heater
9-10 Forcibly turn off the hot water tank
heater
48-10 Smart Grid network input 1
9-10 Smart Grid network input 2
MCC-1755
I/P4
common
line
CN21
1
2
3
4
5
6
7
8
9
10
Hydro Unit sub PCB
common
line
I/P 3
I/P 2
I/P 1
I/P 8
I/P 7
I/P 6
I/P 5
Locally procured
CN21 Heating Cooling
Reach Not reach Reach Not reach
1-5 (I/P1) open close - -
2-5 (I/P2) - - close open
I/P7 I/P8 Operation Mode
0 0 Restricted Operation
1 0 System OFF
0 1 Normal Operation
1 1 System Forced ON
29-EN 30-EN

– 16 –
Hydro Unit Installation Manual
Restricted Operation
• Maximum compressor frequency is limited.
System OFF
• System safety controls (e.g.freeze protection) will
remain active.
Normal Operation
• This is not a START signal, only a recommendation
to start.
System Forced ON
• The space heating set point temperature is
increased during this period. The temperature
increase can be adjusted using a new DN “DN [AC]”.
(0 ~ 10 K)
• ON/OFF delay of the Hydro Unit back up heater
changes from 10 min to 0.
DN [6CE] = 0: HP and back up heaters ON
DN [6CE] = 1: HP only operation
• The Hot water control changes to Hot water boost
control.
I/P7: TEMPO1 signal input
• DN [B6] = 1
• Non-voltage contacts
• When the TEMPO signal is input (the circuit is
closed), the boiler signal is output regardless the
outside temperature and devices are turned off
Heater.
1.Basic operation: heating operation using the boiler.
2.Switching to hot water supply: the water circuit is
switched to the hot water supply side as the unit
detect that TTW is less than 38°C.
3.Switching to heating: the water circuit is switched to
the heating side as the unit detect that TTW is
45°C or more, or 30 minutes has passed since
operation started. Heating operation continues at
least 30 minutes.
4.The LED on the PC board lights up when the input
signal is ON.
I/P7: TEMPO2 signal input
• DN [B6] = 2
• Non-voltage contacts
• When the TEMPO signal is input (the circuit is
closed), the boiler signal is output regardless the
outside temperature and devices are turned off
heater, inlet pump, heat pump.
1.Basic operation: heating operation using the boiler.
2.Switching to hot water supply: the water circuit is
switched to the hot water supply side as the unit
detect that TTW is less than 38°C.
3.Switching to heating: the water circuit is switched to
the heating side as the unit detect that TTW is 45°C
or more, or 30 minutes has passed since operation
started. Heating operation continues at least 30
minutes.
4.The LED on the PC board lights up when the input
signal is ON.
I/P7 & I/P8: Forcibly turn off heaters
• Non-voltage contacts
• DN [B6] = 3
I/P7: Forcibly turn off the backup heater
I/P8: Forcibly turn off the hot water tank heater
Open: Normal operation
Close: Forcibly turn off the heater
I/P7: Emergency Shutdown input
• DN [B6] = 0
• Non-voltage contacts
Open: Normal operation
Close: Emergency shutdown
CAUTION
• Be sure to prepare a non-voltage continuous contact
for each terminal.
• Supplementary Insulation must be added to user
touchable part of switches.
Electrical safety checks
The electrical safety checks must be completed before
turning on the electrical supplies to the Air to Water
heat pump system. The electrical safety checks should
be completed by a qualified electrician. All results
measured should comply with your local/national
electrical installation regulations.
Earth continuity test
On completion of the electrical installation a resistance
test should be completed on the earth conductor to
ensure continuity between all pieces of equipment on
the earth conductor.
Insulation resistance test
This test must be completed using a 500 V D.C.
insulation resistance tester. Insulation resistance tests
should be completed between each live terminal and
earth.
■Second remote controller
(option)
Installation place
• Install the remote controller at a height of 1 to 1.5 m
from the floor so that the average temperature in the
room can be detected.
• Do not install the remote controller in a place
exposed to direct sunlight or direct outside air, such
as the side of a window.
• Do not install the second remote controller in a
location where the air flow around the remote
controller in restricted.
• Do not install the remote controller in a freezing box
or refrigerator, as the remote controller is not
waterproof.
• Install the remote controller vertically to the wall.
Installation dimension
Room temperature
sensor
120 mm
120 mm 20 mm
4-Ø4.2×8 slotted hole24 mm
22 mm
42 mm42 mm
31-EN 32-EN

– 17 –
Hydro Unit Installation Manual
Remote controller installation
NOTE
• Wiring for the remote controller should not be bundled
or installed in the same conduit with a power cable.;
otherwise, malfunction may result.
• Install the remote controller away from sources of
electrical interference and electromagnetic fields.
1. Insert a flat-blade screwdriver into the groove on
the back side of the remote controller to remove
the rear case.
2. Use the wood screws (2 pieces) supplied with
the remote controller to attach the rear case of
the remote controller to the wall.
Do not use an electrical screwdriver. Do not
over-tighten the screw
(Tightening torque is up to 2 kg / f•cm.);
otherwise, the rear case may be damaged.
3. Connect the electrical wire from the Hydro Unit
to the terminal block of remote controller.
(Refer to “Wire the remote controller”.)
Check the terminal number of electrical wire
from the Hydro Unit to avoid miswiring.
(If AC 220-240 V is applied, the remote
controller and Hydro Unit will break down.)
■Wire the remote controller
Wiring diagram
Terminal block (TB04) for the remote control wiring on
the Hydro Unit
Second remote controller installation
requirements
Installation
For a dual remote controller system, install the remote
controllers in the following way.
1. Set one of remote controllers as the header
remote controller. (Remote controller of Hydro
Unit is preset as Header.)
2. Set from “Header / Second” in “Initial setting” on
the setting screen.
• To control room temperature instead of water
temperature with this remote controller, set DN “40”
of Hydro Unit to “1”.
Basic wiring diagram
NOTE
Terminals of A and B have no polarity.
To diverge from the Hydro Unit
Rear case
Remote controller
Wood screw x 2
<Back side of the remote controller>
Wall
A
B
A
B
Remote control wiring (procured locally)
Terminal block for the
remote control wiring
Remote
controller
* Terminals of A and B
have no polarity.
* Use wire of 0.5 mm2to 2.0 mm2.
* A crimp-style terminal cannot be used.
AB AB
AB
Remote control
wiring (Locally
procured)
0.5 mm2to 2.5 mm2.
Remote controller
(Header)
Remote controller
(Second)
(Sold
separately)
Terminal block (TB04)
for the remote control
wiring
Earth
Hydro Unit
■Central Remote Controller (option)
To connect the Central Controller and BMS (TU2C-LINK)
CN902 for the central remote control wiring on the Hydro Unit PCB
Communication wiring and central control wiring use 2-core non-polarity wires.
Use 2-core shield wires to prevent noise trouble.
In this case, for the system grounding, close (connect) the end of shield wires, and isolate the end of terminal.
When connecting and controlling the system controller, the central control address (DN03) setting is required.
On some system controllers, DN03 may be set automatically.
For details, refer to the manual of the system controller used and the installation manual.
Item DN Details
Central control address 03 1 ~ 128
1
2
Hydro Unit
main PCB
Remote controller
Connection
point
(Optional parts)
TCB-KBCN32VEE
White
Locally procured
(Terminal block, connector, etc.)
Red
Blue
50 cm
Locally procured
2-core, non-polarity, Shielded wire type
Size : Total Length
1.0 to 1.5 mm2: Up to 1000 m
2.5 mm2: Up to 2000 m
Central
Remote
Controller
CN903
CN902
33-EN 34-EN

– 18 –
Hydro Unit Installation Manual
■0-10V interface [HWS-IFAIP01U-E] (option)
To connect the 0-10V interface
TB04 for the 0-10V interface wiring on the Hydro Unit E-BOX
• Communication wiring use 2-core non-polarity wires.
• Use 2-core shield wires to prevent noise trouble.
• In this case, for the system grounding, close (connect) the end of shield wires, and isolate the end of terminal.
• Be sure not input more than DC10V to the analogue input terminals.
• The remote controller line (AB line) is available to connect a maximum of 2 units.
For example the Header plus the second remote controller or the KNX or the MODBUS or the Wireless Adapter
or the 0-10 V controller.
This option allows Hydro Unit to be controlled either Setting temperatures or Capacity.
Control of Setting temperature
• DN 680 is set to "1".
• Set the input method for each setting temperature.
• Allocate the temperature of 0 to 10V, and also set its resolution.
DN Item Selectable value (Input from)
681 Hot water setting temperature. 0:Not use AI 1: AI 1 2: AI 2 3: AI 3
682 Zone 1 setting temperature for heating. 0:Not use AI 1: AI 1 2: AI 2 3: AI 3
683 Zone 2 setting temperature for heating. 0:Not use AI 1: AI 1 2: AI 2 3: AI 3
684 Zone 1 setting temperature for cooling. 0:Not use AI 1: AI 1 2: AI 2 3: AI 3
RC : Remote controller
*( ) : HWT-110
DN Item Selectable value
685 Upper limit of hot water setting temp.
(at voltage level 16)
40 to 65
Default: 65°C
689 Resolution of hot water setting temp.
(Value per voltage level)
1 to 5
Default: 5°C
686 Upper limit of Zone 1 setting temperature for heating
(at voltage level 16)
20 to 55 (65)
Default: 55°C
68A Resolution of Zone 1 setting temperature for heating
(Value per voltage level)
1 to 5
Default: 3°C
687 Upper limit of Zone 2 setting temperature for heating
(at voltage level 16)
20 to 55 (65)
Default: 55°C
68B Resolution of Zone 2 setting temperature for heating
(Value per voltage level)
1 to 5
Default: 3°C
688 Upper limit of Zone 1 setting temperature for cooling
(at voltage level 16)
7 to 25
Default: 20°C
68C Resolution of Zone 1 setting temperature for cooling
(Value per voltage level)
1 to 5
Default: 1°C
Hydro Unit Terminal block (TB04) for the remote control wiring
Locally procured
2-core, non-polarity
Size : Total Length
0.5 ~ 2.5 mm2: Up to 50 m
AI 1 0-10V (+)
AI 2 0-10V (+)
AI 3 0-10V (+)
Common (-)
Locally procured
Size : Total Length
0.5 ~ 1.0 mm2: Up to 200 m
0-10V interface
PCB
CN1
CN5
1
2
3
4
DDC
(procured locally)
AB
AB
10.0
16
1
3
1.4
0.8 0.6
1.2
2
3.2 3.0
5
2.6 2.4
4
2.0 1.8
3.6
6
9
5.0 4.8
8
4.4 4.2
7
3.8
6.0
10
6.8 6.6
11
6.2
5.6 5.4
13
7.4 7.2
12
9.2 9.0
15
8.6 8.4
14
8.0 7.8
[V] Voltage level
(Upper limit)
Analog input
Capacity direct control
• DN 680 is set to "2, 3 or 4".
DN [680] 0 1 2 3 4
AI 1
Not use
Control of Setting
temperature
Enter settings from DN
681 to 684
Capacity direct control of
HP operation for Heating/
Cooling mode
Not use
Capacity direct control of
HP operation for Heating/
Cooling mode
AI 2 Not use
Capacity direct control of
HP operation for Hot
water mode
Capacity direct control of
HP operation for Hot
water mode
AI 3 Not use Not use Not use
• DN 680 = 2
Analog input enable only for Heating or cooling mode.
• DN 680 = 3
Analog input enable only for Hot water mode.
• DN 680 = 4
Analog input enable for Heating/Cooling and Hot water
mode.
10.0 10.0
100 %
0.0 0.0
2.0 1.8
1. 4
0. 8
5.6 5.4
75
%
5.0 4.8
70
%
4.4 4.2
65
%
3.8 3.6
60
%
3.2 3.0
55
%
2.6 2.4
50
%
9. 2
9. 0
100
%
8. 6
8.0 7.8
95
%
7.4 7.2
90
%
6.8 6.6
85
%
6.2 6.0
80
%
0. 8
0. 6
4.4 4.2
55
3.8 3.6
50
3.2 3.0
45
2.6
%
%
%
2.0
6.6
75
6.2 6.0
70
5.6 5.4
65
5.0
%
%
%
6.8
9.2 9.0
95
8.6 8.4
90
8.0 7.8
85
7.4
%
1.8
1. 4
1. 2
2.4
40
0
%%
0
%
%
4.8
60
7.2
80
%
%
%
[V]
Heating / Hot water
Capacity
Demand
Analog input
No
operation
[V]
Cooling
Capacity
Demand
Analog input
No
operation
AI 1 DC0-10V (+)
Common (-)
0-10V interface
PCB
1
2
3
4
DDC
(procured
locally)
CN5
AI 2 DC0-10V (+)
Common (-)
0-10V interface
PCB
1
2
3
4
DDC
(procured
locally)
CN5
AI 1 DC0-10V (+)
Common (-)
0-10V interface
PCB
1
2
3
4
DDC
(procured
locally)
CN5
AI 2 DC0-10V (+)
35-EN 36-EN

– 19 –
Hydro Unit Installation Manual
8Group control and optional controllers
To operate a group control of multiple Hydro Units
• Hydro Units are available to connect maximum 8 units.
• The wiring of remote controller on the Hydro Unit No.2 to No.8 should be disconnected as shown Fig.8-01.
• When the power supply has been turned ON, the automatic address setup starts and the address that is being
setup flashes on the remote controller display in approximately 3 minutes. During the setup of the automatic
address, the remote controller operation is not accepted.
Required time up to the finish of automatic addressing is approximately 5 minutes.
Please make sure all the DN codes in regard to the operation mode with the same setup.
• The remote Controller line (AB line) is available to connect maximum 2 units. Header plus Second Remote
controller or KNX or MODBUS or Wireless Adapter or 0-10V controller.
O: connected, : disconnected
Hydro Unit No.1 No.2~8
wiring of remote
controller O×
AB AB AB AB
AB
Remote controller inter-unit wires for group
control (Locally procured)
Remote
controller
Remote controller
(Second)
(Sold
separately)
Terminal block (TB04) for the
remote control wiring
Earth
Hydro Unit No.1
EarthEarth Earth
Hydro Unit No.2 Hydro Unit No.3 Hydro Unit No.8
(Header)
Remote
controller
Remote
controller
Remote
controller
▼Fig.8-01
.
NOTE
The above address is set by automatically when the power is turned on. However, Line Address and Group
Address are set randomly.
In some cases, it is necessary to change the address manually after setup of the automatic address according to
the system configuration of the group control.
Group control
• When Group control is used, the Slave Hydro Unit is also able to share the value of the Master Hydro Unit TTW
sensor. In this case TTW Connection of each Slave Hydro Unit is not necessary.
• Set “DN AB” of each Slave Hydro Unit to “1”.
Item DN Details
Line address 12 1 ~ 128
Indoor address 13 1: Default ( 1 ~ 128 )
Group address 14
0: Individual (Not Group control)
1: Header unit
2: Follower unit
Outdoor Unit Outdoor Unit Outdoor Unit Outdoor Unit
Hydro Unit Hydro Unit Hydro Unit Hydro Unit
Remote controller Address: 1-1-1 Address: 2-1-2 Address: 3-1-2 Address: 8-1-2
Line address Group address
Indoor address
37-EN 38-EN