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Refrigeration Maintenance
147
Economizer Heat Exchanger
Replacement
Economizer Heat Exchanger
Removal
Remove the economizer heat exchanger by
performing the following steps:
1. Recover the refrigerant charge from the unit
(see “Recovering Refrigerant” in this chapter).
2. Unsolder the two liquid and two suction line
connections.
3. Unbolt the economizer heat exchanger from
the mounting bracket.
4. Lift the heat exchanger assembly from the
unit.
Economizer Heat Exchanger
installation
Install the heat exchanger by performing the
following steps:
1. Bolt the economizer heat exchanger to the
mounting bracket in the condenser section.
2. Clean the two liquid and two suction lines for
soldering.
3. Solder the liquid and suction lines to the
economizer heat exchanger.
NOTE: Thermo King strongly recommends
that dry nitrogen be used to purge the system
during any solder operations (see “Using
Pressurized Nitrogen” in this chapter).
4. Pressurize the low side and check for leaks
(see “Refrigerant Leak Test Procedure” in this
chapter).
5. If no leaks are found, recover the leak test gas
(see “Refrigerant Leak Test Procedure” in this
chapter).
6. Evacuate the low side (see “Evacuation and
Cleanup of the Refrigeration System” in this
chapter).
7. Recharge the unit with R-404A (see
“Charging the System with Refrigerant” in
this chapter).
8. Perform a controller pretrip test to verify
system operation.
Summary of Contents for 098916
Page 5: ......
Page 11: ...Table of Contents 10...
Page 19: ...Service Guide 18...
Page 28: ...Specifications 27 Figure 2 Physical Specifications AMA313...
Page 41: ...Unit Description Features Options 40...
Page 105: ...Operating Instructions 104...
Page 155: ...Servicing The Unit 154...
Page 187: ...Index 186...
Page 189: ...Wiring and Schematic Diagrams Index 188...
Page 190: ...189 Wiring Schematic...
Page 191: ...190 Wiring Diagram Page 1 of 2...
Page 192: ...191 Wiring Diagram Page 2 of 2...