GENERAL INFORMATION 7
CABINET OPERATION
There are two thermodiscs 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 energize the trip solenoid in the time clock to termin-
ate 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 temperature
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.
MANUAL DEFROST (Cold Wall Models)
DEFROSTING & CLEANING
A complete defrost will be required periodically,
depending on the usage of the cabinet.To defrost:
1. Unload cabinet of product.
2. Pull power supply cord from wall receptacle.
3.To hasten process, set pans of warm water on
shelves of storage compartment, or let a fan blow
into the storage area, with the door open.
4.Wipe all shelving and wall surfaces clean and dry.
5. Remove shelves and shelf standards if necessary
for thorough cleaning.
6. Return all components, plug in power cord.
7. Once cabinet has attained desired temperature,
reload cabinet with product.
EXPORT MODELS
Export model cabinets come equipped with an auto
transformer located in the unit compartment. The
selector switch can be set to various customer voltage
requirements - Factory Setting: Mid position for an
incoming voltage between 212V and 238V.
PRIOR TO STARTING THE CABINET
Supply voltage must be checked in order to determine
the correct position of the variable voltage switch
located on the auto transformer. This will ensure the
cabinet is operating at the correct optimum voltage. In
the event the transformer supply line plug does not
match the electrical outlet, the plug can be changed to
one with equal voltage-amperage rating.
Refer to page 34 for transformer layout.
WAYS TO MINIMIZE FROST
& ICE BUILDUP INSIDE FREEZERS
Moisture-laden air migrates into the freezer during door
openings and, under normal operation, will be absorbed
or removed by the refrigeration system and the defrost
cycle. The lower the temperature is in the freezer, the
more rapidly frost and ice will accumulate. Opening
doors frequently will also increase frost and ice buildup.
There are several things that you can do to reduce the
accumulation of ice/frost on the interior parts of the cab-
inet and product. If this icing condition exists, the follow-
ing items should be checked and corrected as required:
1. Minimize door openings.
2. Keep the length of time door is open to a minimum.
3. Check the door gaskets for possible air leaks. Look
for frost patches around the door openings of both
the inner and outer doors. Make sure that gasket
seals all around door opening; any leak will allow
moist outside air to enter the cabinet.
4. Make sure the door latches work properly.
5.These freezers are designed to operate in range of
-18°C to -30°C. Keep freezer thermostat set as high
as possible to minimize frost buildup.
6. Look for moisture draining from the drain tube at the
rear of the cabinet during and after a defrost.This is
normal and tells you that the unit is going through
proper defrost cycle.The drain line must be properly
trapped as shipped from the factory.
7. Evaporator defrost heater and the drain tube heater
must work properly and have proper voltage supply.
8.The defrost heater and drain heater must be in their
proper locations.
9. Ensure that the freezer is sealed where tubing enters
upper left hand corner of the cabinet.
10.The freezer should not be located where excessive
drafts from doors or air conditioning vents can blow
into it.
IMPORTANT NOTE
Door may be hard to open for a short period of time after
closing. Wait a few seconds to allow interior air pressure
to balance.