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Sealed System Information
7011902 - Revision A - October, 2009
International Integrated
International Integrated
(ICB700 Base)
(ICB700 Base)
Series
Series
HFC-134a REFRIGERANT SERVICE INFORMATION
The ICB700 Series sealed systems contain HFC-134a refrigerant. This section provides some general rules for
working with 134a, and explains procedures to be followed while servicing the sealed system. This is followed by
diagrams which illustrate sealed system operation, then model-specific refrigerant flow diagrams.
General Rules for Working with 134a Refrigerant:
• Use equipment dedicated to 134a sealed system service only.
• Use only 134a refrigerant for back-flushing and sweep charging.
• Always replace the high-side filter-drier when servicing the sealed system.
• The high-side filter-drier must be cut from the sealed system. Never un-braze the drier as the heat will drive
moisture into the sealed system.
• Do not leave the sealed system nor replacement compressor open to the atmosphere for more than ten (10)
minutes.
• When the rubber plugs are pulled from the service compressor, a release of pressure should be heard. If no
release of pressure is heard, do not use the compressor.
• Use ONLY virgin 134a refrigerant when recharging the sealed system.
• 134a refrigerant requires Synthetic Ester oil in the compressor, and does not tolerate contamination from
other refrigerants, moisture, petroleum-based lubricants, silicone lubricants, cleaning compounds, rust
inhibitors, leak detection dyes, or any other type of additive.
• If servicing the sealed system, do not leave it nor any replacement components open to the atmosphere
for more than ten (10) minutes, as the Synthetic Ester oil will attract moisture.
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