Hot Gas Valve And Txv - Scotsman UC2024 Series Service Manual

UC2024 and UC2724 Service Manual

Hot Gas Valve and TXV

As with other components, replacement of either of
these two parts requires removal of the back panel.
TXV
1. Disconnect electrical power.
2. Recover refrigerant.
3. Remove back panels.
4. Remove insulation covering expansion valve and
bulb.
5. Remove strap securing bulb to suction line.
6. Unsweat the expansion valve from the liquid line.
Remove it.
7. Unsweat the drier from the liquid line. Remove it.
8. Connect nitrogen to discharge access valve.
9. Immediately place new valve in ice machine.
10. Open nitrogen bottle at very low pressure and
braze expansion valve inlet and outlet joints
together. Braze new drier into system.
11. Shut off nitrogen.
12. Evacuate to at least 300 microns.
13. Weigh in the nameplate charge. Check for leaks.
14. 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.
15. Reattach valve and bulb insulation.
16. Reconnect electrical power.
Hot Gas Valve
1. Disconnect electrical power.
Electrical Shock Hazard
Disconnect electrical
power before beginning
Electrical Shock Hazard
Disconnect electrical
power before beginning
November 2019
Location of Hot Gas Valve
TXV and Bulb
Locations
2. Recover refrigerant.
3. Remove lower back panel.
4. Unplug the electrical connection from the hot gas
valve.
Note: Reposition drain tubing, electrical wires, liquid
line as needed to avoid damage during brazing.
5. Unsweat the hot gas valve from the tubing.
Remove it.
6. Unsweat the drier from the liquid line. Remove it.
7. Connect nitrogen to discharge access valve.
8. Immediately place new valve in ice machine.
9. Open nitrogen bottle at very low pressure and
braze hot gas valve inlet and outlet joints together.
Braze new drier into system.
10. Shut off nitrogen.
11. Evacuate to at least 300 microns.
12. Weigh in the nameplate charge. Check for leaks.
13. Reattach electrical connection to hot gas valve.
14. Reconnect electrical power.
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