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Control of electrical heater (installed by the user as required)
In the heating mode of the unit, when the water return temperature is lower than the set value 5
℃
( for the single-compressor unit) or the water return temperature is lower than or equal to the
set value 6
℃
(for the double-compressor unit), start the electrical heater; when the water return
temperature is higher than or equal to the set value minus 2
℃
, turn off the electrical heater.
See Operation Manual for CXAJ Series Modbus Module for the specific wiring and operation of
Modbus module.
Modbus module
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