Thermo King 914 724, Руководство пользователя

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Refrigeration Service Operations (Rev. 1/99)
63
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 check valve on the other end of the
spring with the hole in the valve towards the spring.
3. Coat the entire assembly with compressor oil and place
the assembly in the check valve seat in the three-way
valve.
CAUTION: The check valve must be inserted
with the flat side against the valve seat to
ensure proper sealing.
4. Screw the valve stem into the three-way valve until the
snap ring can be installed.
5. Install the snap ring.
6. Unscrew (back seat) the 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,
and 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.
PILOT SOLENOID
Removal
1. Pump down the low side and equalize the pressure to
slightly positive.
2. Disconnect the coil wires.
3. Disconnect the refrigeration lines to the solenoid and
immediately seal them to prevent moisture and air from
entering the system.
4. Unbolt the pilot solenoid and remove it from the
mounting bracket.
Installation
1. Bolt the pilot solenoid to the mounting bracket.
2. Remove the seals from the refrigeration lines, and con-
nect the lines to the pilot solenoid.
3. Connect the electrical wires to the valve.
4. Open the refrigeration valves and place the unit in oper-
ation.
NOTE: If the procedure is done quickly and carefully,
there is no need for evacuation of the system. The
slight amount of air in the pilot solenoid may be
purged out by connecting one line tight and the other
only finger tight, and then releasing the refrigerant in
the system. Tighten the last line.
5. Check for leaks.
IN-LINE CONDENSER CHECK VALVE
The in-line condenser check valve is not repairable and
must be replaced if it fails. A heat sink must be used on the
in-line condenser check valve when it is being soldered in
place to prevent damage to the neoprene seal.
1. Valve
2. Neoprene Seal
3. Valve Seat
4. Spring
Cross Section of In-line Condenser Check Valve
AEA648