High Pressure Cutout (Hpco) Control - Manitowoc QuietQube SD0672C Technician's Handbook

HIGH PRESSURE CUTOUT (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.
Cut-Out
450 psig ±10
CHECK PROCEDURE
1. Set ICE/OFF/CLEAN switch to OFF.
2. Disconnect power to condensing unit.
3. Connect manifold gauges on condensing unit
access valves.
4. Hook voltmeter in parallel across the HPCO,
leaving wires attached.
5. Reconnect condensing unit.
6. Set ICE/OFF/CLEAN switch to ICE, block
condensing unit with cardboard or similar object.
7. No air flowing through the condenser will cause
the HPCO control to open because of excessive
pressure. Watch the pressure gauge and record
the cut-out pressure.
If discharge pressure exceeds 460 psig 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:
1. Will not reset (below 300 psig).
2. Does not open at the specified cut-out point.
216
Specifications
(Must be below 300 psig to reset)
Warning
!
Cut-In
Automatic Reset
Part Number 80-1505-3 6/11