Refrigeration Temperature Control - Delfield 4400 Series Original Instructions Manual

Delfield
Refrigerated Cabinet Operation, continued
Important Information on 4427 Solid Top Models:
The unit is Energy Star Version II compliant. During normal
operation the evaporator fan pulses independently of the
compressor as dictated by the Danfoss Controller as follows:
1. During the cooling mode, compressor and evaporator
fan run simultaneously.
2. During the compressor off mode, evaporator fan pulses
three minutes on and three minutes off.
3. During an actual defrost event other than the off-cycle
defrost, compressor stays off but the evaporator fan runs
continuously.
Temperature Control Knob Access
Salad Top Units and 4427 Flat Top Models
Cabinets with pans should be operated with pans
in place. Operating the cabinet without all pans
in place will lessen efficiency and may damage
CAUTION
the cabinet.
Continuous opening and closing of the door will
hamper the cabinet's ability to maintain optimum
refrigeration temperature.
Top section is not intended for overnight storage.
Product should be removed from pans. Pans can
remain in cabinet while empty.
16
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 KitchenCare at 1-844-724-
2273 if you are unsure of the proper function.
Cooling Cycle
Compressor On
Evap Evap
Fan On Fan Off
4400
X
Open Top
4400
X
Solid Top
4427
X
Solid Top
Defrost Cycle
Compressor Off Compressor Off
Evap Evap Evap
Fan On Fan Off Fan On Fan Off
X X
X X
Cycles On 3-Min,
X
Off 3-Min
Evap