Manitowoc CVD1375 Specifikace stáhnout pdf (Strana 174)

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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.

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.

Replace the HPCO control if it:

1. Will not reset (below 300 psig).

2. Does not open at the specified cut-out point.

Specifications

Cut-Out Cut-In

450 psig ±10 Automatic Reset

(Must be below 300 psig to reset.)

Warning

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.

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Manitowoc CVD1375 Specifikace Strana 174