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Electrical Maintenance (Rev. 04/03)
50
5.
If the switch is out of calibration, pressurize the hose
again until the tester indicates 0.7 in. (17.78 mm) H
2
O.
Adjust the screw clockwise or counterclockwise until
the switch closes and the continuity tester indicates a
completed circuit with the gauge reading 0.7 in. (17.78
mm) H
2
O. Release the pressure.
6.
Repeat test procedure several times to be sure the set-
ting is correct.
7.
Remove the test equipment. Install wire on switch ter-
minal and air sensing tubes on air switch. The BLACK
hose from the high pressure or air inlet side of the evap-
orator coil goes on the hose fitting on the side of the air
switch stamped BLACK. The CLEAR hose from the
low pressure or air outlet side of the evaporator coil
goes on the hose fitting on the side of the air switch
stamped CLEAR.
NOTE: Route hoses for continuous slope to avoid conden-
sate traps.
If too much frost continues to accumulate before defrost,
decrease the pressure setting. Turn the adjustment screw
counterclockwise.
If defrost action occurs with too little frost accumulation,
increase the pressure setting. Turn the adjustment screw
clockwise.
1.
Tool No. 204-442
2.
Squeeze Bulb Tool No. 204-494
3.
Continuity Test
Testing Air Switch
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...