Pressure Relief Valve, Removing And Installing: Removing
-- Remove the heat pump valve unit. Refer to Heat Pump Valve Unit, Removing and Installing .
Risk of damaging electrical components.
The electrostatic charge can damage electrical components.
- Procedures at the electrical components must only be performed at an electro-static discharge work surface.
-- Place the heat pump valve unit on the ESD Work Surface:VAS 6613 .
Remove the pressure relief valve at the valve block for the Refrigerant Expansion Valve 2 -N637- and the Refrigerant Expansion Valve 3 -N638- :
-- Refer to Refrigerant Expansion Valve 2 N637, Removing and Installing .
Continuation
Remove the pressure relief valve at the valve block for the Refrigerant Shut-Off Valve 4 -N642- and the Refrigerant Shut-Off Valve 5 -N643- :
-- Refer to Refrigerant Shut-Off Valve 4 -N642-, Removing and Installing .
Continuation
-- Check the area around the pressure relief valve -2- for contamination and clean.
-- Remove the pressure relief valve -2- from the valve block -1-.
Tip
The pressure relief valve has a left-hand thread.