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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.
15.
Optional Electric 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).
CN16
AP1
optional water temperature sensor
Optional water temperature sensor connecet to AP1 CN16.
