Service; Service And Maintenance; Compressor Replacement - Hussmann Proto-Aire EZ Manual Del Usuario

Proto-Aire EZ I/O Manual

Service and Maintenance

IMPORTANT: Since Hussmann has no direct control over the installation,
providing the freeze-burst protection is the responsibility of the installing
contractor.
Know whether or not a circuit is open at the power supply. Remove all power before
opening control panels. Note:
Always use a pressure regulator with a nitrogen tank. Do not exceed 2 psig and
vent lines when brazing. Do not exceed 350 psig for leak testing high side.
Do not exceed 150 psig for leak testing low side.
Always recapture test charge in approved recovery vessel for recycling.

Service

Compressor Replacement

Before beginning removal of old compressor prepare replacement compressor as follows:
Verify:
Replacement compressor:
• Electrical requirements
• Refrigerant application
• Capacity
• Piping hookup location and design
• Suction and discharge gaskets
• Mounting requirements
• Replace the compressor contactor when replacing a compressor.
• Have compressor in an easily accessible position, uncrated and unbolted from
shipping pallet.
Disconnect Electrical Supply
Turn off motor and control panel power supplies to the unit.
Turn off control circuit and open all compressor circuit breakers.
Tag and remove electrical wires from the compressor.
Isolate compressor.
some equipment has more than one power supply
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