Repair Procedures: Thermostatic Expansion Valve - Scotsman N0922L Service Manual

N0922L, N1322L, F1222L, F1522L
Remote Low Side Service Manual Includes Prodigy Plus

Repair Procedures: Thermostatic Expansion Valve

1. Remove front panel.
2. If the machine was in operation, push and release
the off button to shut it down.
3. Disconnect electrical power.
4. Shut ball and liquid line access valves to isolate
machine.
5. Recover refrigerant from head.
6. Remove insulation covering expansion valve and
bulb.
7. Remove strap securing bulb to suction line.
8. Unsweat the expansion valve from the liquid line.
Remove it.
9. Unsweat the drier from the liquid line. Remove it.
10. Connect nitrogen to discharge access valve.
11. Immediately place new valve in ice machine.
12. Open nitrogen bottle and braze expansion valve
inlet and outlet joints together. Braze new drier
into system.
13. Shut off nitrogen, shut access valves.
14. Evacuate to at least 300 microns.
15. Open ball and liquid access valves
16. Attach bulb to suction line. Position at 4 or 8
o'clock on the tube. Secure tightly but do not crush
the bulb with the strap.
17. Attach valve and bulb insulation.
18. Reconnect electrical power.
19. Return all panels to their original positions.
December 2014
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