VOGT ICE TUBE-ICE P-24A, Service Manual

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P24A & P34A Service Manual
TROUBLESHOOTING
12/17/12
8-8
Symptom: High discharge pressure (check gage accuracy)
Possible Cause Possible Remedy
Insufficient water flow through the cooling
tower or condenser Check the condenser water pump to make sure
it is pumping enough water as specified in
TABLE 3-2. Check sump strainer screen and
clean. Check condenser pump direction of
rotation.
Fan control out of adjustment Check adjustment. Refer to FIGURE 9-3, “Fan
Control”. Replace if defective.
Non-condensable in system. If non-condensables are present with the
refrigerant, the saturated temperature will not
relate to the pressure reading at the receiver.
The refrigerant will be cooler, although the
pressure will be high. Air can be purged from
the system by following instructions in Section
9, “Purging Non-Condensables”.
Cooling tower or evap condenser in need of
maintenance Check fan motor and fan belts for proper
operation and tension. Check spray nozzles,
tubes,
sump, and sump screen, for
accumulation of mineral deposit and clean as
required. Check tower blowdown and
chemical treatment if applicable.
Dirty condenser tubes Visually inspect the condenser tubes to see if
there is any build-up of mineral deposit which
would reduce the cooling effect of the tubes
and water. Clean chemically or mechanically
as applicable.
Too much liquid in condenser/receiver
covering tubes causing inefficiency Remove refrigerant so all tubes will be above
liquid refrigerant level.