Refrigeration Maintenance (Rev. 04/03)
72
2.
Using a screwdriver, gently turn the check valve stem
in until the valve is front seated.
3.
Install a service gauge manifold set on compressor.
4.
Close (front seat) the receiver tank outlet valve.
5.
Operate the unit on cooling, and pump down the low
side to 20 in. (-68 kPa) of vacuum.
6.
Stop the unit. the condenser and suction pressures
should remain stable, indicating no leaks.
7.
Shift the three-way valve to heat position. low side
gauge will raise slightly. High side gauge will drop to
approximately zero. Gauges will equalize.
8.
Gauges will remain in this position (approximately
zero) if the three-way valve seals properly toward the
condenser and the condenser pressure bypass check
valve seals properly.
9.
Back seat condenser pressure bypass check valve stem
against snap ring. Both gauges should rise indicating
the condenser pressure bypass check valve is properly
releasing condenser pressure into the discharge tube
and evaporator.
10. Replace the cap on the condenser pressure bypass
check valve.
NOTE: Valve stem MUST be back seated during nor-
mal unit operation.
11. Open the receiver tank return outlet valve, remove the
gauges and return the unit to normal operation.
Three-way Valve Condenser Pressure Bypass
Check Valve
Summary of Contents for 088669
Page 4: ......
Page 8: ......
Page 12: ...Safety Precautions Rev 04 03 iv PUB126...
Page 13: ...Safety Precautions Rev 04 03 v aea105...
Page 14: ......
Page 28: ...Unit Description Rev 04 03 14 Rear View Curbside RD II SR Evaporator aea105...
Page 32: ...Unit Description Rev 04 03 18 Power Receptacle Box RD II SR 50 aea102...
Page 76: ...Refrigeration Maintenance Rev 04 03 62...
Page 77: ...Refrigeration Maintenance Rev 04 03 63...
Page 81: ...Refrigeration Maintenance Rev 04 03 67...
Page 103: ...89 Hilliard Clutch Maintenance Clutch Assembly...
Page 106: ...Hilliard Clutch Maintenance Rev 04 03 92 12 Install retaining ring Clutch Torque Values...
Page 125: ...111 Cool Cycle RD II SR with TherMax Heating...
Page 126: ...112 Condenser Cycle RD II SR with TherMax Heating...
Page 127: ...113 Heat and Defrost Cycle RD II SR with TherMax Heating...
Page 129: ...115...
Page 130: ...116...
Page 131: ...117...
Page 132: ...118...
Page 133: ...119...
Page 134: ...120...
Page 135: ...121...
Page 136: ...122...