50
Replacement Procedures
Service Manual
SKOPE BackBar X
Refrigerant R134a handling precautions
It is important to maintain dedicated HFC service equipment and parts
Refrigeration gauges
Service lines / Fittings
Vacuum Pump
Charging equipment
Driers
Compressors
Temperature / Pressure chart
HFC (R134a) refrigeration systems require special service procedures
because of the highly hygroscopic (moisture sensitive) polyolester (POE)
compressor oil:
The system (especially compressor) must only be open for the very
minimum time (to prevent moisture ingression). All parts required for
servicing must be at hand - before the system is opened, and there
should be no interruption until the system is on the vacuum pump (or
hermetically sealed).
The system must not be open for longer than 20 minutes maximum.
The drier must be replaced every time the system is opened.
Clean work practices are essential.
SKOPE recommend brazing the system closed after service, as valves
are prone to leak due to the nature of R134a.
