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Hot Water Pump or Three Way Valve:
If the indoor side water pump is for both heating and
domestic hot water circulation, set SF10=0, connect a 3
way valve to terminal (7-8-9)
If another pump is used for the domestic hot water circuit,
set SF10=1, connect the hot water pump to terminal (8-9).
Water Flow Switch:
If water flow switch of indoor/outdoor side is not
assembled in the factory, it has to be installed at
site and connected to connection ports C1-C2 C3-C4.
It is used to check if the water flowing is sufficient
or not in the system. If all water flow switches
work normally and the water is flowing, then the
compressor will start, otherwise the compressor is
prohibited to start.
Electrical Connection
C3 C4
C2
C1
Outdoor flow
switch
Indoor flow
switch
Note
This is a potential free input contact only. DO NOT PUT 230VAC INTO THIS CONTACT
