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TRUE
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STARTUP
A. The compressor is ready to operate. Plug in the cooler.
B. Temperature controls are factory-set to give refrigerators
an approximate temperature of 35°F (1.7°C) and freezers
an approximate temperature of -10°F (-23.3°C). Allow unit
to function several hours, completely cooling cabinet before
changing the control setting.
Temperature Control Location and Settings.
• Temperature control type will vary upon model and age of
cabinet.
• Mechanical control or electronic control without display:
- Inside cabinet
- Behind cabinet
- Behind front or rear access grill
• Electronic control with display:
- In countertop
- In top louvered panel
- In or behind bottom louvered grill
See website for adjustments, sequence of operation, and more
information.
C. Excessive tampering with the control could lead to service
difficulties. Should it ever become necessary to replace
temperature control, be sure it is ordered from your TRUE
dealer or recommended service agent.
D. Good air flow in your TRUE unit is critical. Be careful to
load product so that it neither presses against the back wall,
nor comes within four inches of the evaporator housing.
Refrigerated air off the coil must circulate down the back wall.
NOTE:
If the unit is disconnected or shut off, wait five minutes
before starting again.
RECOMMENDATION
- Before loading product we recommend
you run your TRUE unit empty for two to three days. This allows you
to be sure electrical wiring and installation are correct and no ship-
ping damage has occurred. Remember, our factory warranty does not
cover product loss!
LIGHT SWITCH LOCATION:
Light switch location depends
upon the GDM model. Most GDM models will have the light switch
located on the right side of the ceiling inside the unit. Most instances
the switch is located next to the temperature control. GDM-49’s and
72’s have the switch located on the right side of the evaporator hous-
ing along the interior ceiling. GDM-9’s, 5’s, and GDM-5PT’s have the
switch located on the left side of the ceiling. Some convenience store
GDM’s have the switch located behind the sliding doors above the
light bulb for example the GDM-33SSL-54 and the GDM-33CPT-54.
G4SM-23 models have an additional switch for the rotating display
shelves. The switch for the rotating shelves in the G4SM-23 models is
located under the sign frame.
OPERATION
MECHANICAL TEMPERATURE CONTROLS
COIL SENSING
An evaporator coil sensing temperature control ensures that the evaporator coil will remain clear
of frost and ice by not allowing the compressor to restart until the coil temperature is above the
freezing temperature. This is considered an
off cycle defrost.
AIR SENSING
An air sensing temperature control used in a freezer application will require a defrost cycle with
heaters to ensure that the evaporator coil is kept clear of frost and ice.
