Refrigeration Service Operations (Rev. 04/03)
109
Installation
1.
Apply a thin layer of refrigerant oil to new O-rings and
install the inlet and outlet nuts.
2.
Install the new drier and tighten the mounting bracket
screws and nuts. Install new O-rings.
3.
Install and tighten the inlet nut to the receiver tank out-
let valve line (inlet end of drier is labeled “IN”). Hold
the drier with a back-up wrench on the hex behind the
flare fitting.
4.
Release a small amount of refrigerant to purge the air
through the drier. Then tighten outlet nut on the dehy-
drator to the evaporator line.
5.
Pressurize the system and inspect for leaks. If no leaks
are found, open the refrigeration valves and place the
unit in operation.
EVAPORATOR COIL
Removal
1.
Remove the refrigerant charge.
2.
Remove the evaporator top panel.
3.
Disconnect the expansion valve from the distributor.
Disconnect the air switch hoses.
4.
Unsolder the suction line and drain pan hot gas line
from the evaporator coil.
5.
Disconnect the electric heaters and high temperature
coil sensor on Model 50 units.
6.
Remove the mounting bolts and slide the coil from the
evaporator housing.
Installation
1.
Place the evaporator coil in the housing.
2.
Install the mounting bolts and tighten.
3.
Clean the tubes for soldering.
4.
Solder the suction line and drain pan hot gas line con-
nections to the evaporator coil.
5.
Connect the distributor to the expansion valve
assembly.
6.
Connect the air switch hoses and install the high tem-
perature cutout switch and electric heaters (Model 50).
7.
Pressurize the low side and test for leaks. If no leaks are
found, evacuate the unit.
8.
Open the refrigeration valves and place the unit in oper-
ation. Install the refrigerant charge and compressor oil
and add as required.
EXPANSION VALVE ASSEMBLY
Removal
1.
Pump down the low side and equalize pressure to
slightly positive.
2.
Remove the feeler bulb from the suction line clamp.
Note the position of the feeler bulb on the suction line.
3.
Unsolder the equalizer line from the expansion valve.
4.
Unsolder the inlet liquid line and the distributor from
the expansion valve.
5.
Remove the expansion valve mounting bolt and remove
the expansion valve from the unit.
Installation
1.
Install and bolt the expansion valve assembly in the
unit.
2.
Solder (95-5 Solder) the inlet liquid line and the distrib-
utor to the expansion valve.
3.
Solder (95-5 Solder) the equalizer line to the expansion
valve.
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...