R22 Refrigerant Pressure Tubes
and Valves Replacement.
This task covers:
Shop Equipment, Automotive Maintenance and
System shut down. Power shut off, power panel and
rear control panel tagged.
Tool Kit, Service: R22 Refrigeration Unit
ECU doors and covers opened or removed as
ECU work platform installed (reference
Lower Receiver Tank Tube
Lower Expansion Valve Tube
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.
R22 refrigerant system must be evacuated prior to replacing pressure lines (see para 3.9.1).
Failure to evacuate system may result in injury to personnel.
Cover or plug openings immediately after removing line to prevent contamination. Remove
all covers and plugs prior to connecting lines.