Thermo King SLXi Spectrum, Maintenance Manual

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Refrigeration Service Operations 11-9
Heat Exchanger
Removal
1. Pump down the low side and equalise the pressure to 0 psig, (0 bar g).
2. Remove the evaporator access panels.
3. Remove the mounting bolts that hold the heat exchanger on the bulkhead.
TLE and SPECTRUM REMOTE EVAPORATOR NOTE: Unsolder the inlet and outlet connections. Then go to step 8a.
4. Unsolder or disconnect the equaliser line from the suction line.
5. Unsolder or disconnect the liquid outlet line from the expansion valve.
6. Note the position of the feeler bulb on the side of the suction line. Remove the expansion valve feeler bulb from the suction
tube.
7. Unsolder the suction line at the evaporator coil end.
8. Unsolder the remaining outlet suction line and inlet liquid line connections from the condenser side of the bulkhead. Remove
putty from around the lines before unsoldering the connections.
a. TLE and Spectrum evaporators: Unsolder the remaining outlet suction line and inlet liquid line connections from the heat
exchanger.
9. Lift 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. Install the mounting hardware loosely.
TLE and SPECTRUM REMOTE EVAPORATOR NOTE: Tighten mounting hardware. Solder the inlet and outlet
connections. Then go to step 8.
3. Solder liquid inlet and suction outlet line connections on the condenser side of the bulkhead. Seal openings through bulkhead
with putty when refrigerant lines have cooled off.
4. Tighten the heat exchanger mounting hardware securely.
5. Solder suction line connection to the evaporator coil.
6. Solder the equaliser line to the suction line.
7. Solder liquid outlet line to expansion valve.
8. Replace Drier
9. Pressurise the low side and test for leaks. If no leaks are found, evacuate the unit.
10. Clean the suction tube to a bright polished condition. Install the feeler bulb clamps and 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 operation will be faulty. Wrap with
correct insulating material.
NOTE: Do not use oil or grease once the surfaces are clean.
11. Open the receiver tank outlet valve. Place the unit in operation. Install refrigerant charge.
12. Check refrigerant charge and compressor oil level
Accumulator
Removal
1. Pump down the low side and equalise the pressure to 0 psig, (0 bar g).
2. Remove the mounting bolts from the accumulator tank mounting brackets.
3. Unsolder the inlet and outlet suction lines from the accumulator tank.
CAUTION: Use a heat sink or wrap vibrasorber with wet rags to prevent damage to the vibrasorber.
4. Remove the accumulator from the unit.
Installation
1. Place the accumulator in the unit and loosely install the mounting bolts.
2. Solder the inlet and outlet suction lines to the accumulator tank.
CAUTION: Use a heat sink or wrap vibrasorber with wet rags to prevent damage to the vibrasorber.