Thermo King SB-210, Manual

Page: 115 / 159

Refrigeration Service Operations
115
8. Unsolder the remaining outlet suction line and
inlet liquid line connections from the
condenser side of the bulkhead. Remove any
putty from around the lines before unsoldering
the connections.
9. Slide the heat exchanger assembly out of the
evaporator housing.
Installation
1. Clean the tubes for soldering.
2. Place the heat exchanger assembly in the
evaporator housing and install the mounting
hardware loosely.
3. Solder the liquid inlet and the suction outlet
line connections on the condenser side of the
bulkhead. Seal the openings through the
bulkhead with putty when the refrigerant lines
have cooled off.
4. Solder the suction line connection to the
evaporator coil.
5. Connect the equalizer line to the suction line
and the liquid outlet line to the expansion
valve.
6. Pressurize the low side and test for leaks. If no
leaks are found, evacuate the low side.
7. Tighten the heat exchanger mounting
hardware securely.
8. Clean the suction tube to a brightly polished
condition. Install the feeler bulb clamps and
the feeler bulb on the side of the suction line
in its former position. The feeler bulb must
make good contact with the suction line or the
operation will be faulty. Wrap with insulating
tape.
9. Replace the upper and lower evaporator
access panels.
10. Open the refrigeration valves and place the
unit in operation.
Evaporator Coil
Removal
1. Pump down the low side and equalize the
pressure to slightly positive.
2. Remove the upper and lower evaporator
access panels.
3. Remove the roadside and curbside evaporator
access panel mounting channels.
4. Disconnect the sensors.
5. Remove the feeler bulb from the suction line
clamp. Note the position of the feeler bulb on
the suction line.
6. Unsolder the distributor from the expansion
valve.
7. Unsolder the hot gas line and the suction line
from the evaporator coil.
8. Remove the mounting bolts, lift and slide the
coil from the housing.
Installation
1. Place the evaporator coil in the evaporator
housing and install the mounting bolts.
2. Solder the hot gas line and suction line
connections to the evaporator coil.
3. Connect the distributor to the expansion valve.
4. Replace and connect the sensors.
5. Pressurize the low side and test for leaks. If no
leaks are found, evacuate the low side.
6. Clean the suction line to a bright polished
condition. Install the feeler bulb on the side of
the suction line in its former position. The
feeler bulb must make good contact with the
suction line or its operation will be faulty.
Wrap with insulating tape.
7. Replace the roadside and curbside evaporator
access panel mounting channels.
8. Replace the evaporator access panels.
9. Open the refrigeration valves and place the
unit in operation. Check the refrigerant charge
and the compressor oil. Add as required.