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Refrigeration Service Operations
148
9. Install the pilot solenoid line and pressurize
the system with refrigerant to check for leaks.
10. If there are no leaks, evacuate the system and
recharge with the proper refrigerant.
11. Run the unit to check for proper three-way
valve operation.
Three-Way Valve Condenser
Pressure Bypass Check Valve
Repair
Removal
1. Recover the refrigerant charge.
2. Unscrew the condenser pressure bypass check
valve cap from the three-way valve.
3. Remove the snap ring.
4. Unscrew the check valve stem by using a
screwdriver in the slot provided.
NOTE: The spring and piston are held in by
the stem. While removing the stem, use care
so the spring and piston are not lost.
5. Remove the spring and piston.
6. Inspect the check valve seat in the three-way
valve.
7. If replacement parts are needed, a kit
P/N 60-163 must be used which includes the
piston, spring, O-ring, valve stem, and snap
ring.
Installation
1. Coat the O-ring with compressor oil and
install it on the check valve stem.
2. Insert the spring into the hole in the check
valve stem and then install the piston on the
other end of the spring with the hole in the
piston towards the spring.
3. Coat the entire assembly with compressor oil
and install the assembly into the check valve
seat in the three-way valve.
4. Screw the check valve stem into the three-way
valve until the snap ring can be installed.
5. Install the snap ring.
6. Unscrew (back seat) the check valve stem
against the snap ring.
NOTE: The valve stem must be back seated
during normal unit operation.
7. Coat the sealing area in the cap with
compressor oil, install and tighten the cap on
the three-way valve.
8. Pressurize the refrigeration system and test for
leaks. If no leaks are found, evacuate the
system.
9. Recharge the unit with the proper refrigerant.
Pilot Solenoid
Removal
1. Recover the refrigerant charge.
2. Disconnect the wires and remove the coil from
the valve.
3. Unsolder the refrigeration lines.
4. Remove the mounting bolts and remove the
valve.
Installation
1. Remove the coil from the valve.
1.
Piston
4.
Stem
2.
Snap Ring
5.
O-ring
3.
Cap
6.
Spring
Figure 233: Teflon Check Valve Assembly
AEA715
CAUTION: The piston must be inserted
with the flat side against the valve seat to
ensure proper sealing.