12
are necessary, contact White-Westinghouse
or adjust door hinges. See page 8.
9. Excessive line voltage variation:
Incubator will operate satisfactorily over full
temperature range (-10°C to 50°C) when line
voltages vary from nominal voltage by -5% or
+10%. Larger voltage variations may impair
the Temperature Control. Correct as required.
10. Excessive ambient temperature variation:
If the incubator is placed close to the air-
conditioning outlet, hot radiators, or direct
sunlight, or if the ambient temperature
changes drastically, the chamber temperature
will be affected. Correct as necessary.
CAUTION
THE INCUBATOR SHOULD NOT BE OPERATED IN
AN ENVIRONMENT WHERE THE AMBIENT
TEMPERATURE EXCEEDS 90°F, AS THE
COMPRESSOR THERMO-OVERLOAD WILL BE
TRIPPED AND WILL RESULT IN A WIDE BAND
CONTROL CYCLE OF APPROXIMATELY ±4°C.
SUCH CYCLING SHOULD NOT BE
MISINTERPRETED AS A MALFUNCTION OF THE
ELECTRONIC CONTROLS.
11. Overcharged compressor:
This would happen only if compressor was
overcharged after installation.
For correct charge, see nameplate located
behind lower portion of door. If unit has more
charge than shown, it will not reach 50°C.
Compressor must be discharged and
recharged correctly.
12. The circuit design calls for continuous
compressor operation. If compressor cycles
"On-Off", it is an indication that the starting
relay is overriding the control circuit. This may
be the result of excessive (90°F) ambient
temperature adjacent to the compressor,
excess dirt on the compressor, or a relay
malfunction. Provide additional wall clearance
and/or circulation around the unit, clean
compressor, or contact White-Westinghouse
for service. See page 8.
MAINTENANCE
The design of the incubator is such that periodic
maintenance is kept to a minimum. No lubrication
is required. The following paragraphs cover the
few minor procedures necessary for continuous
operation.
WARNING
TURN OFF POWER SWITCH AND UNPLUG LINE
CORD TO INCUBATOR.
If the chamber needs to be cleaned, a mild soap
and water solution or bicarbonate of soda (1tbsp./
gallon of water) is recommended.
When the incubator is used frequently below
ambient temperatures or in any manner that
increases moisture buildup within the chamber, an
appropriate defrosting schedule must be
determined. Defrosting is accomplished by turning
the incubator off for 24 hours. Moisture will collect
in the drip pan beneath the incubator.
WARNING
1) OVERCHARGING A REFRIGERATION SYSTEM
CAN CAUSE EXCESSIVE SYSTEM PRESSURE
AND IT CAN BE DANGEROUS.
2) THE COMPRESSOR TERMINAL PROTECTIVE
COVER MUST BE PROPERLY IN PLACE BEFORE
APPLYING ELECTRIC POWER TO THE
COMPRESSOR.
3) CAUTION SHOULD BE EXERCISED BY SERVICE
PERSONNEL WHEN SERVICING
REFRIGERATION SYSTEM.
4) SERVICE SHOULD BE PERFORMED BY A
CERTIFIED REFRIGERATION TECHNICIAN
ONLY.
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