95
Port
Description
Logic
Remark
CN3-
XIAO
CN9
pump_0
●Ambient temperature control
1. If the following conditions are met at the same time, water pump
will start after the 10 seconds minimum stop time.
a. ON/OFF by wired controller
b. Tai meets the opening conditions
2. If any of the following conditions are met, the water pump delay
1min OFF
a. Unit OFF by wired controller
b. Tai reaches the setting temperature
d. Flow error
Water pump is foreced to open when in defrosting, oil return, anti
freezing operation
●Water temperature control
1. Water pump open (and)
a. Unit ON by wired controller
b. There is a cooling or heating signal when selecting a third party
controller
2. If any of the following conditions are met, the water pump delay
1min OFF
a. No cooling or heating third party signal
b. Unit OFF by wired controller
c. Flow error
Water pump is foreced to open when in defrosting, oil return, anti
freezing operation
●Water pump speed control
1. Differential temperature control
a. Cooling: Temperature difference between inlet and outlet
△
T=Twi-Two=5°C
b. Heating: Temperature difference between inlet and outlet
△
T=Two-Twi=6°C
Operate as max. speed when in startup, defrosting, anti rusting anti
freezing
2. Constant speed control
Constant speed output according to pump output duty from
controller setting(default max. running speed is 0%)
pwm
CN4-
XIAO
Gas Boiler
Refer to Aux. heating control and SG function, Bivalent control
220V
