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Refrigeration Service Operations (Rev. 04/03)
112
HIGH PRESSURE RELIEF VALVE
Removal
1.
Remove the refrigerant charge.
2.
Unscrew and remove the high pressure relief valve.
Installation
1.
Apply a refrigerant locktite to the threads of the high
pressure relief valve.
2.
Install and tighten the high pressure relief valve.
3.
Pressurize the refrigeration system and test for leaks.
If no leaks are found, evacuate the system.
4.
Recharge the unit with refrigerant and check the com-
pressor oil.
PILOT SOLENOID
Removal
1.
Pump down the low side and equalize pressure to
slightly positive.
1.
High Pressure Relief Valve
1
AEA34
2.
Disconnect the lines to the solenoid and immediately
cap to prevent moisture and air from entering the
system.
NOTE: The lines from the three-way valve to the pilot
solenoid will leak refrigerant at a high velocity and
should be capped.
3.
Disconnect the electrical wires and remove the pilot
solenoid.
Installation
1.
Replace the pilot solenoid in the unit.
2.
Remove the caps from the lines and connect lines to the
pilot solenoid. Connect line from the three-way valve
first. Connect wires to the valve.
3.
Open the refrigeration valves and place the unit in oper-
ation.
4.
Check for leaks.
PRESSURE REGULATOR VALVE
Removal
1.
Pump down the low side and equalize pressure to
slightly positive.
2.
Release remaining pressure and unsolder pressure regu-
lator valve from the accumulator tank and suction tube.
Installation
1.
Clean the tubes for soldering.
2.
Place the valve in position and solder connections.
3.
Pressurize the low side and check for leaks.
4.
If no leaks are found, evacuate the low side.
5.
Open the refrigeration valves, and place the unit in
operation. Check the refrigerant charge and add refrig-
erant as required.
Summary of Contents for KD-II SR
Page 4: ......
Page 8: ......
Page 13: ...Safety Precautions Rev 04 03 v AEA40...
Page 14: ...Safety Precautions Rev 04 03 vi AEA38...
Page 33: ...Unit Description Rev 04 03 19 1 Evaporator 2 Access Door Rear View Curbside KD II SR 1 2 AEA38...
Page 37: ...Unit Description Rev 04 03 23 Power Receptacle Box KD II SR 50 AEA42...
Page 58: ...Remote Control Panel Features Rev 04 03 44...
Page 112: ...Refrigeration Maintenance Rev 04 03 98...
Page 120: ...106...
Page 146: ...132...
Page 156: ...142...
Page 162: ...148...
Page 170: ...156...
Page 172: ...158...
Page 173: ...159 KD II 30 Schematic Diagram Page 1 of 2...
Page 174: ...160 KD II 30 Schematic Diagram Page 2 of 2...
Page 175: ...161 KD II 30 Wiring Diagram Page 1 of 2...
Page 176: ...162 KD II 30 Wiring Diagram Page 2 of 2...
Page 177: ...163 KD II 50 Schematic Diagram Page 1 of 2...
Page 178: ...164 KD II 50 Schematic Diagram Page 2 of 2...
Page 179: ...165 KD II 50 Wiring Diagram Page 1 of 2...
Page 180: ...166 KD II 50 Wiring Diagram Page 2 of 2...
Page 181: ...167 KD II 50 SR 230 1 60 Wiring Diagram Page 1 of 2...
Page 182: ...168 KD II 50 SR 230 1 60 Wiring Diagram Page 2 of 2...