Page 67 of 72
ELECTRICAL OPERATION
WHAT DOES IT WHAT HAPPENS
WHEN THE VENDER TEMPERATURE GETS UP TO THE CUT-IN SETTING:
The temperature control switch Closes the run winding circuit of the compressor
motor.
Closes the start relay coil circuit.
Closes in the condenser fan motor circuit.
THE HEAVY CURRENT, DRAWN BY THE RUN WINDING, ALSO FLOWS IN THE START
RELAY COIL, AND:
The start relay coil Closes the start relay contacts and completes the start
winding circuit of the compressor motor.
WHEN THE COMPRESSOR MOTOR GETS UP TO SPEED
The spring in the relay Pushes the start relay contacts apart because
The start relay coil no longer gets enough current to hold the contacts
closed,
The start relay contacts open in the start winding circuit of the compressor
motor.
IF THE COMPRESSOR MOTOR DRAWS TOO MUCH CURRENT AND CAUSES THE
THERMAL OVERLOAD ASSEMBLY TO GET TOO WARM
The thermal overload switch Opens the run winding circuit and disconnects the
compressor motor.
WHEN THE THERMAL OVERLOAD ASSEMBLY COOLS DOWN AGAIN
The thermal overload switch Closes the run winding circuit and the start relay coil
circuit of the compressor motor.
WHEN THE VENDER TEMPERATURE GETS DOWN TO THE CUT-OUT SETTING
The temperature control switch Opens in the run winding circuit of compressor
motor.
Opens in the starting relay coil circuit.
To Next Page
Loading...
