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14
Delfield
Defrosting of Flat Top Models Except 4427
Refrigerators defrost automatically with every cycle of the
compressor. The water generated is routed to a pan on the
rear of the cabinet and is evaporated by the heat given off
by the compressor.
Defrosting of Salad Top, Mega Top and 4427 Flat
Top Models
The electronic temperature controller monitors evaporator
temperature and compressor run time to determine the
proper time for a positive defrost cycle. A defrost cycle can
occur as often as every 45 minutes under extremely heavy
usage. When the controller enters the defrost mode the
compressor is shut off and will remain off until the evaporator
coil temperature exceeds 41
°
F or the controller reaches a time
limit of 50 minutes. The defrost cycle can last from a minimum
of 2 minutes to a maximum of 50 minutes.
Service Alert
During normal operation the evaporator fan may cycle
and/or pulse independently of the compressor. Consult
the service manual or contact Technical Support at
1-800-733-8829 if you are unsure of the proper function.
Cooling Cycle
Defrost Cycle
Compressor On Compressor Off Compressor Off
Evap
Fan On
Evap
Fan Off
Evap
Fan On
Evap
Fan Off
Evap
Fan On
Evap
Fan Off
4400
Open Top
X
X
X
4400
Solid Top
X
X
X
4427
Solid Top
X
Cycles On 3-Min,
Off 3-Min
X
Refrigerated Cabinet Operation,
continued
Summary of Contents for 4427N
Page 21: ...21 Compact Refrigerators Notes ...
Page 22: ...22 Delfield Notes ...