Carrier BT30RF- EXPR Service & Installation Manual page 75

TEMPERATURE CONTROL
Located on the unit compartment, behind the front
grill. The temperature setting may be changed by:
1. Remove the two screws that hold the cover in
place;
2 Adjust the temperature control knob to desired cav-
ity temperature. Replace cover.
The thermostat dial is calibrated in degrees
Fahrenheit, but does not indicate temperatures inside
the storage compartment. Typical performance for
thermostat control settings is listed below. Cabinet
thermostats are factory preset for 0°F.
Thermostat Setting
+20°
+10°
+5°
SWITCH HOUSING COVER REMOVED
IMPORTANT: Use only factory authorized replace-
ment parts and procedures.
CAUTION: Always disconnect supply circuits
before removing explosion proof cover.
76
Freezer Temp. Cavity Temp.
+11°F 51°
+12°F 41°
+10°F 41°
2 2
1 1
REPLACEMENT OF SWITCHES
Types E121 & F120
1. Remove cover, (2) switch mounting screws, switch
and insulator.
2. Disconnect (3) switch wires at switch terminal.
3. Install new switch and wire per SET POINT
ADJUSTMENTS.
4. Mount switch and insulator inside enclosure and
recalibrate per SET POINT ADJUSTMENTS.
SET POINT ADJUSTMENTS
NOTE: For set point adjustments and recalibration,
connect control to a calibrated temperature
source and stabilize unit.
TYPE E121
Adjust set point by turning external knob and pointer to
desired setting on scale.
Recalibration—adjusting set point after replacing
switch(es) and/or thermal assembly:
Slowly turn adjustment knob until switch transfers.
Compare switch transfer point to actual temperature. If
they do not agree, loosen set screws on adjustment
knob and align pointer to indicate actual temperature.
TEMPERATURE CONTROL
BT30RF-EXPR