Part 2 Commissioning & Maintenance For R22 System; Trial Operation - Haier MRV II Instruction Manual

Part 1

13 Trial operation

After testing leakage, evacuation and charging additional
refrigerant , before being electrified , please check the following items:
13.1 The capacity of indoor and outdoor without load, and the specs of
circuit breaker. Check if power cable is in compliance with the provision.
13.2 If the power cable is fixed reliably, grounding resistance should not
be over 4Ω
13.3 Check with 500V ohmmeter if the insulated resistor to ground is over
1MΩ.
13.4 Measure the voltage of power supply with multimeter and check if it
is within ±10% of rating voltage.
13.5 Check if the signal wire system is connected correctly according of
wiring diagram, if the shielded wire is grounded , if the diameter and color
match with the wiring diagram.
13.6 Check if the refrigerant piping is connected correctly according to
drawings, if the pipe diameter and branch pipe type are correct .
13.7 If the drainage testing for condensing drainage pipe has been done.
13.8 If the high pressure stop valve, low pressure stop valve and oil
equalized valve are open.
After checking over all above items, supply power to air conditioner, after
the compressor pre-heats for over 12 hours , system could start to run.
13.8.1 Make the system run both in cooling and heating mode
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