Installation
4.14 Wiring of 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 1 group or 2 group, and only works fo space heating.
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.
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