True TMC-49-HC Installation Manual page 10

TRUE
milk coolers
MECHANICAL TEMPERATURE CONTROLS
WHEN TO MAKE AN ADJUSTMENT TO A MECHANICAL TEMPERATURE CONTROL
We advise to make a mechanical temperature control adjustment only for a high altitude location.
HOW TO ADJUST A MECHANICAL TEMPERATURE CONTROL
GE TEMPERATURE CONTROL ADJUSTMENT FOR
HIGH ALTITUDE APPLICATIONS:
REQUIRED TOOLS:
• Jewelers screwdriver (Small screwdriver)
GE CONTROL INSTRUCTIONS:
The scale to the right may be used as a guide for measuring
degrees of rotation required for altitude correction. See
Figure 1. The arrows indicate direction of screw rotation.
Turn calibration screw clockwise to obtain warmer operating
temperatures.
STEP 1 - Unplug cooler.
STEP 2 - Remove the screws that secure the temperature
control to the inset box.
STEP 3 - To make these adjustments it may be necessary to
remove the temperature control from the housing.
NOTE: You may have to remove the wires attached to the
control. Take note as to which wire is on which spade terminal.
STEP 4 - Pull out gently from cabinet.
STEP 5 Each 1/4 turn of the calibration screw is equal to
approximately 2 degrees F. Do not make more than 3/4 turn.
After making adjustment, measure temperature during three
cycles before adjusting again.
NOTE: Only adjust the screw (small flathead) on the face of
the control (next to the cam). See Figure 3.
STEP 6 - Make sure to reconnect the wires to the proper
spade terminal when reinstalling.
Follow the Altitude Correction Table to the right.
10
Scale Guide for Measuring
60
55 5
50 10
45 15
40 20
35 25
30
1
Altitude Correction
Front of Temperature Control
To adjust the temperature control
take the control knob off to view the
3
cut-in screw. (See Photo Above)
ALTITUDE CORRECTION TABLE:
CALIBRATION SCREW ADJUSTS
BOTH CUT-IN AND CUT-OUT
Altitude (Feet) Clockwise Turns
2000 7/60
3000 11/60
4000 15/60
5000 19/60
6000 23/60
7000 27/60
8000 30/60
9000 34/60
10,000 37/60
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Back of Temperature
Control
Compressor
Terminals
Ground
Terminal
2
Calibration
Screw
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