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CRR-20 & CRR-40, September 1999
Electrical, Refrigeration and
µ
P-D Menu Flow Diagrams
Schematic Circuit Tracings
9-27
1
Typical model shown with three evaporator fans.
2
Evaporator fans stop during Null mode when Economy Mode is set to ON in the Program menu of the
µ
P-D con-
troller. During Economy Mode operation, a Null state timer automatically starts and operates the evaporator fans on
low speed for 5 minutes every 45 minutes. The unit remains in Null until the return air temperature increases to 1.0 C
(1.8 F) above setpoint at the expiration of a 45 minute Null state time sequence.
Null Mode
1
— Frozen Load (Setpoint at -10.0 C [14.0 F] or Below); After Compressor Pump Down; Economy
Mode ON
3
Содержание CRR-20
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