85 PB
R-32 SEALED SYSTEM REPAIRS
Compressor Replacement -Special Procedure in Case of Compressor Burnout
WARNING
HIGH PRESSURE HAZARD
Sealed Refrigeration System contains refrigerant
and oil under high pressure.
Proper safety procedures must be followed,
and PPE must be utilized
when working with refrigerants.
Failure to follow these procedures could
result in serious injury or death.
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation. Extreme care must be used, if it
becomes necessary to work on equipment with
power applied.
Failure to do so could result in serious injury or
death.
WARNING
EXPLOSION HAZARD
The use of nitrogen requires a pressure
regulator. Follow all safety procedures and
wear protective safety clothing etc.
Failure to follow proper safety procedures
could result in serious injury or death.
1. Recover all refrigerant and oil from the system. Refer to Refrigerant
Removal, Recovery, and Evacuation Section of this manual.
2. Cut and remove compressor and capillary tube from the system.
CAUTION: Seal all openings on the defective compressor
immediately. Compressor manufacturers will void warranties
on units received not properly sealed. Do not distort the
manufacturers tube connections.
3. Flush evaporator condenser and all connecting tubing with dry
nitrogen or equivalent. Use A2L approved flushing agent to remove all
contamination from system. Inspect suction and discharge line for carbon
deposits. Remove and clean if necessary. Ensure all acid is neutralized.
4. Reassemble the system, including a new capillary tube assembly and
strainers.
5. Install a dual port suction line drier on the common suction line and
remove when the pressure differential across the drier ports reaches 3
psi. or greater.
6. Braze all connections. Refer to the Brazing section of this manual.
7. Charge system with proper amount of refrigerant per the model
nameplate. Refer to the refrigerant charging section of this manual.
WARNING
NEVER, under any circumstances,
liquid charge a rotary-compressor
through the LOW side. Doing so
would cause permanent damage to
the new compressor. Use a charging
adapter.
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