Warranty

4
III. OPERATION CONT. IV. MAINTENANCE
1. NOTE: Some models are equipped with a main
power switch. If so equipped, make sure the switch
is in the off position before plugging the
merchandiser into the outlet. Plug the merchandiser
power cord into the lower receptacle of electrical
outlet. After a few seconds delay, the compressor
and the condenser fan motor should start. If the
merchandiser is an automatic defrost system, the
evaporator fan motors and the light fixture should
start immediately when power is applied. The
condensing unit will continue to run until the air
temperature in the cabinet reaches +16° F. If the
merchandiser has a condensate evaporator, plug the
cord into the upper receptacle of the electrical outlet
and the heater rod will begin to heat.
2. Temperature Control: The merchandiser is equipped
with an electronic temperature controller. The
controller display is visible through the left end of
the compressor cover and will display the cabinet
temperature. The cabinet temperature is maintained
by the controller turning off the compressor when
the set point on the control is reached. Refer to page
(6) for instruction on viewing the set point. Consult
Leer Inc. for instructions if the adjustment to the
control set point is necessary.
3. Loading Ice: After merchandiser is operating at
required temperature, load with packaged ice.
Stacked packaged ice should not exceed heights
that will cause poor refrigeration efficiency.
Approximately 6" needs to be clear from top of
stacked ice to top of inside interior for effective
refrigerated ice storage. Auto-Defrost units require
good fan air flow for effective circulation.
DO NOT block evaporator assembly fan/grill
openings. Air channels require unrestricted air
flow convection around packaged ice. Cold Wall
units should have ice stacked to allow access of
air to thermostat sensor at upper rear interior.
1. Refrigeration: Clean refrigeration cover grill
openings, condenser fins, and condenser fan blades
at least every 3 months or more often if needed. A
dirty condensing unit can cause merchandiser to
become less efficient, and may lead to compressor
Failure.
NOTE: DO NOT place any type of filter media
for dust/dirt collection in front of condenser
coil. Testing has shown filter media will create
restricted air flow and may lead to compressor
Failure.
2. Defrosting: Frost forms on the evaporator when
door is opened and warm air enters merchandiser.
A. Cold Wall (CW) Evaporator: Cold Wall
merchandisers utilize the merchandiser interior
walls and ceiling as the refrigeration evaporator
and frost will accumulate on all these surfaces.
The merchandiser can be defrosted using a
wooden paddle, plastic scraper, or hot air.
DO NOT use a sharp instrument to "chop" the
frost as you may penetrate metal surface and
refrigerant tubing and do irreparable damage.
A drain plug is located on the right side of
cabinet floor under the ice pallet to allow water
to drain.
B. Auto-Defrost (AD) Evaporator: Auto-Defrost
merchandisers utilize a unit cooler evaporator
with an electric defrost heating element to melt
the frost off the evaporator coil. The defrost
cycle is controlled by the electronic controller which
will energize the defrost heating element every four (4)
hours for a maximum of 15 minutes. The controller has
a sensor inserted into the evaporator coil that monitors
the coil temperature. When the preset temperature is
reached the controller will terminate the defrost cycle
and begin the refrigeration operation.
Before each reloading of packaged ice, inspect
operation of unit cooler fan motor(s). Replace
motor(s) not operating or merchandiser
refrigeration will not work effectively. Inspect
unit cooler drain hose to be sure it is not kinked
or plugged. Water must drain to condensate
evaporator for designed operation. (See
Condensate evaporation maintenance)
CAUTION: Disconnect power plug from
electrical supply before maintenance on
electrical components to avoid risk of
electrical shock.
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