Set-up subject to change without notice. For packages not listed contact Dixie-Narco Factory
Service at (800) 688-9090. Page 66 of 72
ELECTRICAL PARTS
TEMPERATURE CONTROL
The temperature control is a temperature operated switch that controls power to the compressor and
condenser fan motor in response to cabinet temperature. It consists of a capillary tube filled with a
small amount of refrigerant connected to bellows and an electric switch. One end of the capillary tube
is located in a slot in the evaporator housing. The other end is connected to the bellows and switch
which are located in an enclosure in the lower right hand side of the cabinet. The pressure of the vapor
in the capillary tube rises and falls with changes in the cabinet temperature. As the cabinet temperature
gets warmer or cooler, the vapor expands or contracts, causing the bellows to operate, thereby the
switch operates and turns the compressor on or off.
CAUTION: To adjust the temperature control see page 10.
THERMAL OVERLOAD ASSEMBLY
The thermal overload is a temperature activated switch that interrupts power to the compressor when
excessive temperatures occur. This switch protects the compressor from the damage that will occur if
the compressor continues to operate under adverse conditions. The overload also opens under
abnormally high electrical current draw, protecting the motor windings from damage. Frequent
overload trips may lead to warm product and be the first indication of a dirty condenser or other
refrigeration related problems that require attention.
STARTING RELAY
The starting relay is a device that connects the start winding of the compressor during start up. The
additional winding (start) helps the compressor motor come up to speed. Once it reaches speed the
starting relay disconnects the start winding from the circuit.
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