SCN60
Service
Evaporator Replacement
1 | Go through all steps to remove the gear | 3 | Disconnect electrical power. |
| reducer. |
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| 4 | Remove control box cover |
2 | Add temporary refrigeration system access |
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| valves to the discharge and suction sides of the | 5 | Unplug all wires. |
| refrigeration system . |
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| 6 | Remove screws holding controller to box. |
3 | Recover the refrigerant. |
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| 7 | Remove controller. |
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| connections from the evaporator. | 8 | Before touching replacement controller, touch a |
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| metal surface of the cabinet to discharge any |
5 | Remove original dryer. |
| static electricity. |
6 | Attach permanent access valves to system. | 9 | Place new controller in control box, connect all |
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| wires previously removed. |
7 | Attach dry nitrogen to system and purge at |
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| about 1 lb pressure while brazing all | 10 | Reverse remaining steps to reassemble. |
| connections, including access valves, dryer |
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| and evaporator. | Ice level sensor | |
8 | Remove nitrogen source, evacuate system to | 1 | Pull out to get access to top panel. |
| 300 microns or less. |
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| 2 | Remove top panel. |
9 | Weigh in the nameplate charge. |
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| 3 | Disconnect electrical power. |
Water Reservoir |
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| 4 | Remove control box cover |
1 | Pull unit out to get access to top and back |
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| panel. | 5 | Unplug wire at J9. |
2 | Shut water supply off. |
| Ice Level |
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| Sensor |
3 | Pull drain plug and drain all water. Return plug |
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to its original position.
4Loosen nut at water valve inlet and separate inlet tube from reservoir valve.
5Pull outlet hose off reservoir tank.
6Remove screws holding reservoir to unit and lift off.
7 | Reverse steps to reassemble. | 6 | Remove 5 screws and lift sensor from control |
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| box. |
Controller |
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| 7 | Replace with new part. |
1 | Pull out to get access to top panel. |
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| 8 | Reverse remaining steps to reassemble. |
2 | Remove top panel. |
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| May 2011 | |
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| Page 18 | |
