Scotsman F0522 Manuel de service télécharger pdf (Page 51)

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.

Recover refrigerant.

5. Remove insulation covering expansion valve

and bulb.

6. Remove strap securing bulb to suction line.

7. Unsweat the expansion valve from the liquid

line. Remove it.

8. Unsweat the drier from the liquid line.

Remove it.

9. Connect nitrogen to discharge access valve.

10. Immediately place new valve in ice machine.

11. Open nitrogen bottle and braze expansion

valve inlet and outlet joints together. Braze

new drier into system.

12. Shut off nitrogen, shut access valves.

13. Evacuate to at least 300 microns.

14. Weigh in the nameplate charge. Check for

leaks.

15. 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.

16. Attach valve and bulb insulation.

17. Reconnect electrical power.

18. Return all panels to their original positions.

September 2009

Page 51

N0422, F0522, N0622, F0822, N0922, F1222, N1322, F1522

Air, Water or Remote Service Manual

Electrical Shock Hazard.

Disconnect electrical power

before beginning.

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Scotsman F0522 Manuel de service Page 51