ICE AIR ccHPWH Series, Руководство по установке и обслуживанию

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Operational guideline
：
To drain the system, first isolate the supply and return piping to the unit, then ensure the internal
isolation valves on each heat exchanger are open, next open the drain port at the bottom of inlet water
pipe to drain the water from the system. Opening the air vent on the return piping will speed up the
draining process.
The pipe should be thoroughly flushed and free of debris prior to start-up. Care must be taken
during installation to ensure no foreign debris enters the water-side or air-side heat exchangers.
V. Unit operation
After the unit is powered on, it enters the pre-heating state. In this state, the compressor crankshaft heating belt
is turned on. During the pre-heating process, the unit cannot be turned on, but the start-up command can be
set-up. After the pre-heating time is reached, it will automatically start according to the start-up command. In
the pre-heating state, you can cancel the preheating according to the prompt or wait for the preheating to
complete. Its purpose is to prevent cold start from damaging the compressor.
There are two means to turn the unit on/off:
1) The ON/OFF key on the keypad
2) Timer: Turn ON/OFF according to the set time
After confirming that there is no fault, the water pump will start running after 60s. The fan will start running 10s
after the water pump is turned on. When the compressor has energy demand, it turns on after the water pump
runs for 75s.
When the unit receives a shutdown command or the demand for adjustment, the four-way valve will switch 5
seconds before the compressor in advance, the compressor will stop immediately, the fan will be turned off after
10 seconds, and the pump will stop running after 3 minutes of continuous operation.