Thermo King Spectrum DE 30-2, Руководство пользователя, Страница: 85 / 140

Refrigeration Service Operations
85
5. Pressurize the low side and test for leaks. If no
leaks are found, evacuate the low side.
6. Replace the access panels.
7. Open the refrigeration valves and place the
unit in operation.
8. Test the unit to see that the expansion valve is
properly installed.
Heat Exchanger
Removal
1. Pump down the low side and equalize the
pressure to slightly positive.
2. Remove the evaporator access panels.
3. Remove the hardware that holds the heat
exchanger on the bulkhead.
4. Unsolder the liquid lines.
5. Unsolder the suction inlet line.
6. Unsolder the remaining outlet suction line
connection from the condenser side of the
bulkhead. Remove any putty from around the
lines before unsoldering the connections.
7. 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 suction outlet line connection 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 inlet line connection.
5. Solder the liquid line connections.
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. Replace the evaporator access panels.
9. Open the refrigeration valves and place the
unit in operation.
Evaporator Coil
NOTE: This procedure applies to the Zone 1 and
Zone 2 evaporator coils.
Removal
1. Pump down the low side and equalize the
pressure to slightly positive.
2. Remove the evaporator access panels and
damper assembly.
3. Disconnect and remove the sensors.
4. Remove the feeler bulb from the suction line
clamp. Note the position of the feeler bulb on
the suction line.
5. Unsolder the distributor from the expansion
valve.
6. Unsolder the hot gas line and the suction line
from the evaporator coil.
NOTE: It may be necessary to unsolder and
remove other refrigeration tubes to remove
the control box side DE evaporator coil.
7. Remove the mounting bolts, lift and slide the
coil from the housing.
1. End View
2. Side View
Figure 57: Location of Expansion Valve Bulb
AEA713