3.9.13 Filter/Drier Components and Valves Replacement.
This task covers:
Shop Equipment, Automotive Maintenance and
Power shut off, power panel and rear control panel
Tool Kit, Service: R22 Refrigeration Unit
ECU covers and doors opened or removed as
ECU work platform installed (reference
R22 Refrigerant Recovery and Recycle Unit
R22 Refrigerant Cylinder, Used
The R22 refrigerant system is pressurized. To prevent injury to personnel, gloves and eye
protection must be worn when working on R22 refrigerant system.
Prevent contact of R22 refrigerant with flame or hot surface. Heat causes R22 refrigerant to
break down and form carbonyl chloride (phosgene), a highly toxic and corrosive gas.
R22 refrigerant must be recovered. Venting R22 refrigerant into the atmosphere is a
violation of public law and subject to severe penalties.
Do not attempt to remove or connect refrigerant servicing equipment while ECV is running.
Failure to observe these warnings can result in injury to personnel.
Cover or plug all openings immediately after removal of filter/drier to prevent contamination.
Remove all covers/plugs prior to reconnecting.
Flow nitrogen through tube assemblies when brazing or unbrazing to prevent damage to
This procedure covers the replacement of the following components and valves: filter/drier
and tube assembly (refrigerant valve RSV3).
Remove/disassemble only to the extent necessary to remove or replace defective assemblies/components. Use
standard maintenance shop practices/procedures.