McQuay MWM09J Manual page 20

MWM-J_(ii)
Diagram shows typical charging method:
Note : R22 - Nil
R410A - Nil
• For R410A, avoid prolong exposure of an opened compressor, or the internal part of refrigerant piping to moist air.
The POE oil in the compressor and piping can absorb moisture from air.
Overall Checking
• Ensure the following, in particular:
1. The unit is mounted solidly and rigid in position.
2. Piping and connections are leak proof after charging.
3. Proper wiring has been done.
• Drainage check – pour some water into drain pan.
• Test run
1. Conduct a test run after water drainage test and gas leakage test.
2. Watch out for the following:
(a) Is the electric plug fi rmly inserted into the socket?
(b) Is there any abnormal sound from the unit?
(c) Is there any abnormal vibration with regard to the unit itself or piping?
(d) Is there smooth drainage of water?
• Check that:
1. Outdoor fan is running, with warm air blowing off the outdoor unit (cooling cycle).
2. Indoor blower is running and discharge cool air (cooling cycle).
3. Suction (low side) pressure is as per recommendations.
4. The remote controller has incorporated a 3 minutes delay in the circuit. Thus, it requires about 3 minutes
before the outdoor unit can start up.
Standard Operating Condition
Cooling only unit
Temperature
Minimum indoor temperature
Maximum indoor temperature
Minimum outdoor temperature
Maximum outdoor temperature
Heat pump unit
Temperature
Minimum indoor temperature
Maximum indoor temperature
Minimum outdoor temperature
Maximum outdoor temperature
Ts : Dry bulb temperature
(Mclecular-Sieve Type)
Th : Wet bulb temperature
Caution
Ts °C / °F
19.0 / 66.2
32.0 / 89.6
19.4 / 66.9
46.0 / 114.8
Ts °C / °F
16.0 / 60.8
30.0 / 86.0
-8.0 / 17.6
24.0 / 75.2
Application Information
Th °C / °F
14.0 / 57.2
23.0 / 73.4
-
-
Th °C / °F
-
-
-9.0 / 15.8
18.0 / 64.4
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