Service Manual for Tri-Channel Cold Pan SUB-GP
8
Refrigeration System Replacement
General
Figure 6
Location of Refrigeration Assembly
The refrigeration system assembly is located in
the front of the unit, (Figure 6).
1. Disconnect unit from power source.
2. Remove vent cover.
3. Using a refrigeration-charging unit, evacuate
refrigerant from the system according to
Duke Manufacturing Service Bulletin
Number 26.
4. Remove expansion valve and evaporator
tubing from refrigeration assembly.
5. Remove refrigeration assembly mounting
hardware.
6. Tag and disconnect wiring at junction box.
7. Slide out refrigeration assembly through
vent.
8. Thoroughly clean the refrigeration assembly
compartment.
NOTE:
Before installing replacement
refrigeration assembly, pressure check
evaporator coils for leaks.
9. Install replacement refrigeration assembly
onto slide bars.
10. Slide in refrigeration assembly to original
position.
11. Install refrigeration assembly mounting
hardware.
12. Install expansion valve and evaporator
tubing from refrigeration assembly.
13. Using tags, connect wiring at junction box.
14. Connect unit to power source and test unit.
15. Charge system according to Duke
Manufacturing Service Bulletin Number 26.
16. Install vent cover.
Recharging Refrigeration System
General
To analyze the performance of a refrigeration
system, temperature readings are recorded and
converted to pressure readings using a standard
pressure/temperature chart.
When it is necessary to service a factory sealed
refrigeration system and return it to its properly
sealed condition, strictly adhere to the following
approved procedure.
Tools
•
Standard hand and refrigeration tools
•
Refrigerant Type: R-134A, 4.5 ounces
