Trane CGWF SE Installation Operation & Maintenance page 64

8) Turn off the power (into standby mode) and make sure the pumps stop after about 2 minutes.
Verify that the local temperature setpoint is set to the required value by pressing the Set button.
9) Turn the main switch to "OFF". Open the cabinet. Reactivate the compressors. Close the cabinet. Turn the main
switch to "ON" (to give power to the unit).
10) Wait for the start of the microprocessor and control.
11) When the compressor is started, wait about 1 minute for the system begins to stabilize.
12) Check the pressure of evaporation and condensation of refrigerant.
13) Verify that, after a period of time necessary for the stabilization of the refrigerant circuit, the liquid indicator placed on
the inlet pipe to the expansion valve is completely filled (no bubbles), and that the moisture indicator signs 'Dry'. The
passage of bubbles within the liquid indicator may indicate a low amount of refrigerant, or an excessive pressure drop
through the filter drier, or an expansion valve blocked at the maximum opening position
14) In addition to checking the sight glass, check the operating parameters of the circuit controlling:
a) Overheating compressor
b) Overheating compressor discharge
c) Sub cooling of the liquid exiting the condenser
d) Evaporation pressure
c) Condensing pressure
15) Measure the values of pressure and temperature by means of the suitable instrumentation and make comparison
by reading the corresponding values directly on the display of the microprocessor on board
16) To temporarily turn off the unit put on standby the unit key or open the remote contact (terminals shown in the
wiring diagram provided with the unit) of the terminal X (by means of a remote switch installed by the customer) or set
time zones. The microprocessor will activate the shutdown procedure that will take a few seconds. The unit water
pump will be running on for two minutes after the unit has been switched off. Do not remove the main power to not
turn off the electrical resistances of the compressor and the evaporator.
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