Air-to-water Heat Pump
29
MONOBLOC
TYPE
13. Optional Electric Heater
Optional electric heater is allowed for the equipment and controlled in such a way when outdoor temperature is 
lower than the set point for startup of the optional electric heater.
        Step 1. Optional electric heater installation
 Optional electric heater should be installed with monobloc unit in series.Moreover,an accessory called optional 
water temperature sensor(5 meter length) shall be installed at the same time.The optional electric heater could be 
1group or 2 group, and only works fo space heating.
.
Mixing 
Valve
Water Pump
Floor 
Temp.
Tank Temp. of 
Heatpump syst
3-Way 
Valve 2
2-Way 
Valve 1
Water Tank EH
Optional 
Water Temp.
Sensor
Monobloc Unit
Optional
E-heater
        Step 2. Electric wiring work
 AC contactor shuould be installed to XT3 KM1(1 group electric heater) or KM1 and KM2(2 group electric heater).
 
Optional water temperature sensor connecet to AP1 CN16.
 
AP1
CN16
optional water temperature sens
 
 
Step 3. Wired controller setting
        Optional electric heater should be selected "1/2" group if necessary from COMMISION
→
FUNCTION,then set