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33 

  WARNING 

 
Please engage a licensed water circuit installer to install this water circuit. 

  The minimum requirement of water in the system is 50 litres. If this value could not be achieved, please install 

additional buffer tank (field supply). 

  This water circuit must comply with relevant European and national regulations (including EN61770), and local 

building regulation codes. 

  Ensure the components installed in the water circuit could withstand water pressure during operation. 

  Do not apply excessive force to piping that may damage the pipes. 

  Use Rp 1 ¼" nut for both water inlet and water outlet connection and clean all piping with tap water before 

connecting to the Mono bloc unit. 

  Cover the pipe end to prevent dirt and dust when inserting it through a wall. If an existing tank is to be connected 

to this Mono bloc unit, ensure the pipes are clean before water pipe installation is carried out. 

  An external filter (30 mesh or more field supplied) must be installed before the water inlet of the Mono bloc unit. 

  Refer to Diagram 3.1 for pipe connection of Radiator, Floor Heater, Tank Unit, Solar Pump Station, 3-way Valve 

Kit and etc. Fail to connect the pipes appropriately might cause the unit malfunction. 

 

Diagram 3.1: Typical Water Piping Installation

Room Thermostat

(Field supply)

3-way Valve Kit

(Complete with Tank Unit)

2-way Valve Kit

(Field supply)

Fan Coil

Unit

Radiator /

Floor Heater

Water

Outlet

Water Inlet

Mono Bloc Unit

External Filter

(Field supply)

Tank Unit

3-way Valve

Kit (Field

supply)

Solar Pump

Station

(Field supply)

Space cooling can be achieved

through the fan coil unit ONLY.

Make sure the fan coil unit is
installed in the cooling circuit.

Do not install radiator

/ floor heater in the

cooling circuit. Fail to

do so might caused

radiator / floor heater

malfunction.

 

 

  Choose proper sealer which can withstand the pressures and temperatures of the system. 

  Make sure to use two spanners to tighten the connection. Tighten the nuts with torque wrench: 117.6 N•m. 

  If non-brass metallic piping is used for installation, make sure to insulate the piping to prevent galvanic corrosion. 

  Do not use pipes that are crushed or deformed. If these inferior pipes are used, it may cause unit malfunction. 

  Make sure to insulate the water circuit piping (insulator thickness : 20 mm or more) to prevent condensation 

during cooling operation (cooling model only) and reduction of heating capacity, as well as avoid freezing of the 
outdoor water circuit piping during winter season. 

  After installation, check the water leakage condition in connection area during test run. 

  In case of a power supply failure or pump operating failure, drain the system (as suggested in the figure below). 
 

H

< H

 

 
When water is idle inside the system, freezing up is very likely to happen which could damage the system. 
 
 
 
 

34 

  Use a drain hose with inner diameter of 15 mm. 

  The hose must be installed in a continuously downward direction and left open to the frost-free atmosphere. 

  If drain hose is long, use a metal support fixture along the way to eliminate the wavy pattern of drain tube. 

  Water will drip from this hose, therefore the outlet of this hose must be installed in an area where the outlet 

cannot become blocked. 

  Do not insert this hose into sewage or drain pipe that may generate ammonia gas, sulfuric gas, etc. 

  If necessary, use a hose clamp to tighten the hose at drain hose connector to prevent it from leaking. 
 

Drain hose connector

Drain hose

 

 

Illustration of how to fix drain hose to Mono bloc unit 

 

(REFER TO WIRING DIAGRAM AT UNIT FOR DETAIL) 
1.  An isolating device must be connected to the power supply cable. 

  Isolating device (Disconnecting means) should have minimum 3.0 mm contact gap. 

  Connect the approved polychloroprene sheathed power supply 1 cord (5 × min 1.5 mm

2

) and power supply 2 

cord (3 × min 1.5 mm

2

) -9kW models or (5 × min 1.5 mm

2

) -12/14/16kW models, type designation 60245 IEC 57 

or heavier cord to the RCCB, and to the other end of the cord to isolating device (Disconnecting means). 

2.  To avoid the cable and cord being damaged by sharp edges, the cable and cord must be passed through a 

bushing (located at the right hand side of the mono bloc unit) before being connected to the terminal block. The 
bushing must be used and must not be removed. 

3.  Secure the cable onto the control board with the holder (clamper). 
 

L

A1

L

A2

L

A3

N

L

A1

L

A2

L

A3

N

L

C1

L

C2

L

C3

N

L

C1

L

C2

L

C3

N

Power Supply 1

Power Supply 2

How to guide power supply cords and optional cable / cord (View without internal wiring)

Power Supply 2

RCCB

Earth wire must be longer

than other wire for safety

reason

Holder

(Clamper)

POWER

SUPPLY 1

POWER

SUPPLY 2

Solar Pump Station Cable (Optional)
Solar Three-way Valve Cable (Optional)

External Control Cable (Optional)
Tank Sensor Cable (Optional)
Tank OLP Cable (Optional)
Room Thermostat Cable (Optional)
Booster Heater Cord (Optional)

Three-way Valve Cable (Optional)

Earth wire must be longer than

other wire for safety reason

Two-way Valve Cable (Optional)

*Cooling model only

Power Supply 1

RCCB

Terminal on the Mono bloc unit
(Power Supply Cord)
Terminals on the isolating

device from power supply

(Disconnecting means)

 

 

35 

How to guide cable/cord to bushing

Bind all power

supply cords to the

U-Shaped Tube

(Covered with

foam) with band

strap (field supply)

Bind all

optional cables

and cords with

this bands.

Bind all power

supply cords to the

Tube (Covered with

foam) with band

strap (field supply)

Guide all the

cable/cord

through the

bushing

Apply cut

Bushing 7

 

 

Connecting with external device (optional) 
1.  All connections shall follow to the local national wiring standard. 
2.  It is strongly recommended to use manufacturer-recommended parts and accessories for installation. 
3.  Maximum output power of booster heater shall be ≤ 3 kW. Booster Heater cord must be (3 × min 1.5 mm

2

), of 

type designation 60245 IEC 57 or heavier. 

4.  Two-way Valve shall be spring and electronic type, refer to “Field Supply Accessories” table for details. Valve 

cable shall be (3 × min 0.5 mm

2

), of type designation 60245 IEC 57 or heavier, or similarly double insulation 

sheathed cable. 
* note:  - Shall be CE marking compliance component. 

- Maximum load for the valve is 9.8VA. 

5.  Three-way Valve shall be spring and electronic type, refer to “Field Supply Accessories” table for details. Valve 

cable shall be (3 × min 0.5 mm

2

), of type designation 60245 IEC 57 or heavier, or similarly double insulation 

sheathed cable.  
* note:  - Shall be CE marking compliance component. 

- It shall be directed to heating mode when it is OFF. 
- Maximum load for the valve is 9.8VA. 

6.  Room Thermostat cable must be (4 or 3 × min 0.5 mm

2

), double insulation layer of PVC-sheathed or 

polychloroprene sheathed cable. 

7.  Tank OLP cable must be (2 × min 0.5 mm

2

), double insulation layer of PVC-sheathed or polychloroprene 

sheathed cable. 

* note:  - if such connection deemed NO necessary for tank OLP, please connect jumper between terminal 

no. 13 and 14. 

36 

8.  Tank Sensor shall be resistance type, please refer to Graph 4.1 for the characteristic and details of sensor. Its 

cable shall be (2 × min 0.3 mm

2

), double insulation layer (with insulation strength of min 30V) of PVC-sheathed or 

polychloroprene sheathed cable. 

9.  External Controller shall be connected to 1-pole switch with min 3.0mm contact gap. (connection refer to Diagram 

4.2). Its cable must be (2 × min 0.5 mm

2

), double insulation layer of PVC-sheathed or polychloroprene sheathed 

cable. 
* note:  - When making such connection, kindly remove the jumper between terminal no. 17 and 18. 

- Switch used shall be CE compliance component. 
- Maximum operating current shall be less than 3A

rms

. 

10.  Must install Solar Connection PCB   (optional) to Mono bloc unit when Solar Pump Station is utilized. Refer Solar 

Connection PCB’s installation instruction for detail of installation. 

11.  Solar Three-way Valve cable shall be (3 × min 0.5 mm

2

), double insulation layer PVC-sheathed or 

polychloroprene sheathed cable. 

12.  Solar Pump Station cable shall be (2 × min 0.5 mm

2

), of double insulation PVC-sheathed or polychloroprene 

sheathed cable. Strongly recommended install with maximum length of 10 meter only. 

 

Terminals on the Mono bloc unit

Three-way

Valve Cable

Two-way

Valve Cable

Solar Pump

Station Cable

External

Controller

Cable

Booster Heater

Cord

Room Thermostat

Cable

Tank OLP

Cable

Solar Three- way

Valve Cable

Tank

Sensor

Cable

Lead wire cord

CL
O

S

E

CL
O

S

E

O

PEN

O

PEN

CLO

S

E

O

PEN

N

H

EAT

CO
O

L

N

L

N

N

Only if Solar Connection PCB installed

1

2

3

4

5

6

7

8

9

10 11 12

13 14 15 16 17 18

19 20 21

22 23

 

 

Terminal screw 

Tightening torque 

N•cm { kgf•cm} 

M4 

157 ~ 196 {16 ~ 20} 

M5 

196 ~ 245 {20 ~ 25} 

-30 -20 -10

0

10

20

30

16000
14000
12000
10000

8000

˚C

6000
4000
2000

0

Graph 4.1: Tank sensor characteristic

Tank Sensor Resistant Vs Temperature

Resi

sta

n

ce 

(Ω

)

 

 

 

Wire stripping

5 mm or

more

(gap between

wires)

No loose strand when
insert

Terminal
board

10

 ±

 1

 m

m

ACCEPT

Conductor over

insert

Conductor not fully

insert

Conductor

fully insert

PROHIBITED

PROHIBITED

17

18

Diagram 4.2: External Controller connecting diagram

External Controller

Terminal

Switch (ON/OFF)

Remove this
jumper if External
Controller (Optional)
is connected to the
Mono bloc unit