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Operation Instructions for Controller
④ Indoor unit installation
Tap "INDOOR UNIT INSTALLATION" icon in Picture 22 to enter the IDU parameters setting interface. You can set the
operating parameters for the IDU.
Function
Selection of IDU Electric Heating Type
Flow Switch
Antirust Operation
IDU Pump Status
Pump Flow Rate Control Mode
IDU Pump Duty Out
Indoor Unit Reset
Floor Sensor Type
Test Operation
△ T of Cool Pump
（△ T=Twi-Two）
△ T of Heat Pump
（△ T=Two-Twi）
DHW Function
Note:
ΔT of Cool Pump: used to control the speed of the water pump based on the temperature difference during cooling
operation.
ΔT of Heat Pump: used to control the speed of the water pump based on the temperature difference during heating
operation.
DHW Function: when the unit is in a cascade scenario (more than 1 heat pump) and one or some of the heat pumps
require the DHW function, the "DHW FUNCTION" of the controller for that indoor unit needs to be set to "ON"; otherwise,
no setting is required.
Picture 26
Parameter Range
None, Heater 1, Heater2, Heater 1&2
Normal, Shielded, Complete shielded
On/Off
Auto/on/off
△ T Between Out and In Water, Constant Speed
Duty Out
0%~100%
On/Off
Flow Meter/Flow Switch
None, Cooling Test, Heating Test
0~15°C
0~15°C
ON/OFF
59
Default
Heater 1&2
Normal
On
Auto
Constant Speed Duty
Out
0%
Off
Flow Meter
None
5°C
6°C
OFF
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