Defrost Setting
The defrost timer is located in the wiring box behind the
header panel. In the event a change needs to be made to
the defrost cycles, first DISCONNECT POWER FROM
THE FREEZER. Remove the header panel and the
wiring box. Set the time-of day on the defrost clock and
check to see that the defrost pins are set to the desired
defrost times. The factory settings consist of 3 defrosts
per day (8 a.m., 4 p.m., & 12 a.m.) – Failsafe pin set at 40
minutes.
Do not change failsafe time.
Cabinet Operation
There are two therm-o-discs located on the evaporator
coil. The purpose of one is to keep the evaporator fan
motors and anti-condensate heaters off after defrost
cycles until the coil reaches 32°F (0°C). This prevents
moisture from being pulled down into the product area
and provides faster pull-down. The purpose of the other
control is to de-energize the defrost heater and to ener-
gize the trip solenoid in the time clock to terminate the
defrost cycle when the fin coil reaches 62°F (17°C).
When the refrigeration system first starts up, the room
temperature and the coil temperature are above 62°F
(17°C). The fan delay thermostat is open and the fans
and anti-condensate heaters remain off.
The fan motors will come on when the evaporator temper-
ature is pulled down to approximately 32°F (0°C). This
fan delay control cannot be adjusted. If a single fan motor
fails to start when the thermostat is below 32°F (0°C), it
may be an indication of a defective fan motor. If all fan
motors fail to start, it is an indication of a defective fan
delay control.
10
Operation
Warning
Disconnect the power to unit before
adjusting the defrost timer.
Defrost Timer
