Thermo King Spectrum DE 30-2, Руководство пользователя, Страница: 92 / 140

Refrigeration Service Operations
92
Check Valve Repair (SLCV,
SLCV2, SLCV3, LRCV, and
PVC)
Removal
1. Pump down the low side and equalize pressure
to slightly positive.
2. Remove the evaporator access panels.
3. Remove the cap nut from the check valve and
remove the spring and seat.
Installation
1. Inspect the inside of the check valve body for
damage or foreign particles that might adhere
to the seat and damage the new seat. If the
body is damaged, replace the check valve.
2. Install the new seat and spring. Place a new
gasket on the cap and tighten the cap.
3. Pressurize the low side and test for leaks.
4. If no leaks are found, evacuate the system.
5. Install the evaporator access panels.
6. Open the refrigeration valves and run the unit.
Check the refrigerant charge and compressor
oil.
Check Valve Replacement
(SLCV, SLCV2, SLCV3, LRCV,
and PVC)
Removal
1. Pump down the low side and equalize the
pressure to slightly positive.
2. Remove the evaporator access panels.
3. Unsolder the lines and remove the check
valve.
NOTE: Disassemble the valve before
unsoldering.
Installation
1. Clean the tubes for soldering.
2. Place the disassembled check valve in
position. The arrow on the valve body
indicates the direction of refrigerant flow
through the valve.
3. Solder the inlet and outlet connections. After
the valve cools, reassemble the valve.
4. Pressurize the low side and test for leaks.
5. If no leaks are found, evacuate the system.
6. Install the evaporator access panels.
7. Open the refrigeration valves and run the unit.
Check the refrigerant charge and compressor
oil.
1. Cap
2. Gasket
3. Spring
4. Seat
5. Body
Figure 63: Check Valve with Cap Nut
AGA173
1
2
3
4
5