56
12.1.4.5 Connecting with External Device (Optional)
All connections shall
follow to the local national wiring standard.
It is strongly recommended to use manufacturer-recommended parts and accessories for installation.
For connection to main PCB
①
1 Two-way valve shall be spring and electronic type, refer to “Field Supply Accessories” table for details. Valve
cable shall be (3 x min 1.5 mm
2
), of type designation 60245 IEC 57 or heavier, or similarly double insulation
sheathed cable.
* note: - Two-way Valve shall be CE marking compliance component.
- Maximum load for the valve is 9.8VA.
2 Three-way valve shall be spring and electronic type. Valve cable shall be (3 x min 1.5 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.
3 Room thermostat cable must be (4 or 3 x min 0.5 mm
2
), of type designation 60245 IEC 57 or heavier cord, or
similarly double insulation sheathed cable.
4 Maximum output power of booster heater shall be ≤ 3 kW. Booster heater cable must be (3 x min 1.5 mm
2
),
of type designation 60245 IEC 57 or heavier.
5 Extra pump cable shall be (2 x min 1.5 mm
2
), of type designation 60245 IEC 57 or heavier.
6 Boiler contact cable / defrost signal cable shall be (2 x min 0.5 mm
2
), of type designation 60245 IEC 57 or
heavier.
7 External control shall be connected to 1-pole switch with min 3.0 mm contact gap. Its cable must be (2 x min
0.5 mm
2
), double insulation layer of PVC-sheathed or rubber-sheathed cable.
* note: - Switch used shall be CE compliance component.
- Maximum operating current shall be less than 3A
rms
.
8 Tank sensor shall be resistance type, please refer to graph below for the characteristic and details of sensor.
Its cable shall be (2 x min 0.3 mm
2
), double insulation layer (with insulation strength of min 30V) of PVC-
sheathed or rubber-sheathed cable.
-30 -20 -10
0
10
20
30
16000
14000
12000
10000
8000
˚C
6000
4000
2000
0
Tank sensor characteristic
Re
sis
ta
n
ce
Tank Sensor Resistance Vs Temperature
9 Room sensor zone 1 cable shall be (2 x min 0.3 mm
2
) double insulation layer of PVC-sheathed or rubber-
sheathed.
10 Outdoor air sensor cable shall be (2 x min 0.3 mm
2
) double insulation layer of PVC-sheathed or rubber-
sheathed.
11 Tank OLP cable must be (2 x min 0.5 mm
2
), double insulation layer of PVC-sheathed or rubber-sheathed
cable.
