Operating Check List; Compressor And Refrigeration System; Final Check; Final Tasks - Iom CWAR 01-N-3ALL Manuel D'installation Et De Maintenance

14.3. OPERATING CHECK LIST

14.3.1. GENERAL
Cheek for any unusual noises or vibration in the running components.
14.3.2. ELECTRICAL
14.3.2.1. SET POINTS
1. Set point of compressor current overload relay.
2. Set point of indoor fan motor current overload relay.
14.3.2.2. OPERATING VOLTAGE:
Recheck voltage at unit supply terminals.
14.3.2.3. CONTROL
1. Operate system and thermostat switches.
2. Check unit is wired for correct control of unit fan, cooling and heating modes.

14.3.3. COMPRESSOR AND REFRIGERATION SYSTEM

1. If outdoor air temperature is below 0°C make sure that the compressor crankcase heater has been
on for at least one hour before starting the compressor.
2. Running check: Start the compressor. Check for any unusual noise or vibration.
3. Operating Pressures: Operate the unit for at last 20 minutes and ensure that the refrigerant pressures
are stabilised, and cheek that they are within the normal operating ranges.
4. Operating Temperature: Check discharge, suction and liquid temperatures.
5. Discharge temperature on cooling cycle should normally not exceed 105°C.
6. Suction superheat should be 6k ±2k.

14.3.4. FINAL CHECK

1. All panels and fan guards are in place and secured.
2. Unit clean and free of remainder installation material.

15. FINAL TASKS

Place the plugs back on the valves and check that they are properly tightened.
If needed, fix the cables and the pipes on the wall with clamping collars.
Operate the air conditioner in the presence of the user and explain all functions.
Show him how to remove, clean and place back the filters.
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