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Section 7 | Refrigeration System |
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Pressure Control Specifications and Diagnostics
HIGH PRESSURE CUT-OUT (HPCO) CONTROL
Function
Stops the ice machine if subjected to excessive high- side pressure.
The HPCO control is normally closed, and opens on a rise in discharge pressure.
Specifications
450 psig ±10 (3103 kPa ±69, 31 Bar ±.69) | |
Manual or automatic reset | |
| Must be below 300 psig (2068 kPa, 20.68 |
| Bar ±.69) to reset |
Check Procedure
1.Set ICE/OFF/CLEAN switch to OFF.
2.Connect manifold gauges.
3.Hook voltmeter in parallel across the HPCO, leaving wires attached.
4.Close the water service valve to the water condenser inlet.
5.Set ICE/OFF/CLEAN switch to ICE.
6.No water flowing through the condenser will cause the HPCO control to open because of excessive pressure. Watch the pressure gauge and record the
!Warning
If discharge pressure exceeds 460 psig (2068 kPa,
20.68Bar ) and the HPCO control does not cut out, set ICE/OFF/CLEAN switch to OFF to stop ice machine operation.
Replace the HPCO control if it:
•Will not reset [below 300 psig (2068 kPa, 20.68 Bar )]
•Does not open at the specified
Part Number |