CONTROL OPERATION
Electronic Control
This unit is equipped with an Invensys
– Ranco model E72R temperature control or a Carel
temperature control. The control parameters are set at the factory and cannot be manually changed in
the field. Control parameter changes can only be made by downloading a new set of parameters using
a program chip supplied by Federal Industries. The pre-set control parameters are listed on the chart in
the Settings Chart below.
Operation
The control uses two sensors, one located in the air stream and one located on the evaporator coil.
The sensor located in the air stream is referred to as the temperature control sensor. The sensor
located on the evaporator coil is referred to as the coil sensor.
The temperature control sensor is located inside the top air duct behind the honeycomb material and
is labeled (TEMP). The sensor location is critical for proper operation on the unit. Do not move or
relocate this sensor.
The coil sensor is strapped to the evaporator coil and is labeled (DEFROST). This sensor location is
critical for proper operation of the unit. Do not move or relocate this sensor.
DETAIL OF TEMP CONTROL
W/SENSOR WIRES ATTACHED
PROBE WIRES ROUTED THRU
TUB FLOOR AND UP BACK OF CASE
PROBE WIRES MOUNTED TO INSIDE
FLANGE OF TOP FRONT BASE RAIL
W/CABLE HOLDERS
DEFROST SENSOR PROBE LOCATION
3" IN FROM COIL HEADER PLATE
MOUNTED TO CENTER COIL TUBE
WITH (2) CABLE TIES
TEMP SENSOR BULB
LOCATED LEFT OF CENTER
IN AIR DISCHARGE DUCT
BLK
BLK
W
TEMP. PROBE PBI
DEFROST PROBE PB2
W
CAREL
CONTROLLER
1110 9 8
76 5
4
BLK
OR
RED
BLK
OR
RED
Y
R
CASE WITH SQUARE EXTENDED CANOPY SHOWN
MAIN POWER SWITCH
REFRIGERATION CONTROL
The temperature control is set to cut in at 41 degrees F. The Temp control cuts out at 13 degrees F at
the coldest setting’ COLD’ and 28 degrees F at the warmest setting, ‘1’ on the control dial.
The temp control turns off the refrigeration system when the control is turned all the way
counterclockwise to the (WARM) position.
Refrigerated Self-Serve Merchandiser (High Profile)
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