Refrigeration Service Operations (Rev 6/98)
87
THREE-WAY VALVE REPAIR
NOTE: The three-way valve can be repaired in the unit if
leakage or damage to the Teflon seals should occur. There
is usually enough give in the copper tubing to separate the
three sections of the valve without unsoldering any tubes.
Removal/Disassembly
1.
Recover the refrigerant charge.
2.
Clean the exterior surface of the valve.
3.
Remove the line from the three-way valve to the pilot
solenoid.
4.
Loosen the four 1/4 in. Allen head screws (DO NOT
REMOVE); use tool P/N 204-424 to break the gasket at
each side of the center section.
CAUTION: Do not force the tool into the brass
or against the bolts.
5.
Remove the four bolts from the valve.
6.
Remove the top cap and spring.
7.
Remove the spring clip. Observe the slot in the piston
and slide piston off the stem.
8.
Remove the seat and stem assembly.
9.
Inspect the following parts for wear or damage:
•
Bottom cap, sealing and support area.
•
Seat, sealing surface.
•
Top cap, sealing and support surface.
The following parts will be discarded:
•
Stem assembly.
•
All gaskets
•
Teflon seal and O-ring.
10. Remove the screen. If any particles drop from the
screen into the discharge line, the discharge line must
be removed at the compressor.
NOTE: The valve body cannot be reconditioned. Seat
positions change and improper sealing will result.
Assembly/Installation
NOTE: Three-way valve Kit P/N 60-156 is supplied to
repair the three-way valves.
After cleaning/inspecting all parts, reassemble the valve.
1.
Install the screen in the bottom cap.
2.
Install the new stem in the bottom cap.
3.
Install new gaskets on both sides of the seat. Dip the
gaskets in compressor oil before installing.
4.
Place the piston on the stem and attach with spring clip.
5.
Install a new O-ring on the piston, and then place the
Teflon seal over the O-ring.
NOTE: The Teflon seal will stretch when it is
installed. To prevent this stretch from becoming per-
manent (and possibly malfunction), the top cap must
be installed immediately.
6.
Install the spring and top cap.
7.
Line up the passageways in the cap and body. Failure
to line up the holes will result in improper operation of
the valve.
8.
Install the bolts and tighten in rotating sequence.
9.
Install the pilot 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.
Summary of Contents for Super II SR+
Page 4: ......
Page 10: ...ii ...
Page 14: ...4 ...
Page 22: ...Unit Description Rev 6 98 12 Front View AEA1350 ...
Page 23: ...Unit Description Rev 6 98 13 Right Side Door Open AEA1351 ...
Page 24: ...Unit Description Rev 6 98 14 Left Side Doors Open AEA1352 ...
Page 26: ...Operating Instructions Rev 6 98 16 Control Box Cover AEA1354 ...
Page 34: ...24 ...
Page 42: ...Electronic Controls Rev 6 98 32 SOFTWARE REVISION 04XX ALARMS AEA1358 ...
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Page 130: ...120 ...
Page 141: ...131 Schematic Diagram SBIII SII RMNII 30 SR MPIV ...
Page 142: ...132 Wiring Diagram SII SBIII RMN30 SR MPIV Page 1 of 4 ...
Page 143: ...133 Wiring Diagram SII SBIII RMN30 SR MPIV Page 2 of 4 ...
Page 144: ...134 Wiring Diagram SII SBIII RMN30 SR MPIV Page 3 of 4 ...
Page 145: ...135 Wiring Diagram SII SBIII RMN30 SR MPIV page 4 of 4 ...