Master Bilt IM-60 s User manual

INSTALLATION & OPERATIONS MANUAL
MASTER-BILT Products
908 Highway 15 North
New Albany, MS 38652
Phone: [phone]
R V 2-29-12
By: LN

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TABLE OF CONTENTS
I. PACKAGING……………………………………………………………………….………………..
II. INSTALATION………………………………………………………….…………………………..
III. OPERATIONS……………………………………………………….…………………….……… -5
1. lectrical………………………………………………………………...………………….…...3
2. Temperature Control…………………………………………..………………………………...4
3. Loading Ice……………………………………………………………….……………….…….5
IV. MAINTENANCE……………………………………………………………………….……………5
1. Refrigeration…………………………………………………………….………………………5
2. Defrosting……………………………………………………………………….………………5
A. Cold Wall (CW)
B. Auto-Defrost (AD)
C. Condensate Evaporator
3. lectrical…………………………………………………………………………….…………..6
4. Door(s)…………………………………………………………………………………………..6
A. Gasket(s)
B. Hinges
5. Cleaning…………………………………………………………………………………………7
V. COLD WALL WIRING DIAGRAM…………………………...…………………………………..8
VI. COLD WALL TROUBLE SHOOTING FLOWCHART…………………………………………9
VII. AUTO-DEFROST WIRING DIAGRAM………………………………………………………....10
VIII. AUTO-DEFROST TROUBLE SHOOTING FLOWCHART…………………………………...11
IX. REPLACEMENT PARTS……..…………………………………………………………….....12-1
X. WARRANTY……………………………………………………………………………………..…14
Read CAUTION highlighted statements and merchandiser labels
NOTE:
Electrical and refrigeration repair work should be done by licensed electrician or Refrigeration Company
Material and product improvement is a continuous commitment at Factory. This manual is subject to modification or
change without notice and without incurring responsibility for previously sold merchandisers and components

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Remove plastic overwrap, banding and corrugation packaging. The wooden skid is removed by unscrewing
6-8 hex head screws holding the skid. Glass Door Models: Remove glass door support bracket(s) and
protective foam block(s).
All merchandisers are tested, inspected and carefully packaged to ensure each unit arrives ready for
operation. Please return postage paid warranty card to activate merchandiser warranty. (See back page of
manual) Retain for future reference.
Note: Merchandiser should be moved close to an upright position. If merchandiser is tilted 45° past
vertical, it is recommended the unit not be used for a time equal to the time it was not vertical. This
will allow the compressor lubricant to return to level for designed operation.
The merchandiser installation location should have a solid level base. If merchandiser is not level, the self-
closing doors on upright models may not close or seal properly. The installation location must also provide
good air flow for designed refrigeration system operation. DO NOT block refrigeration grill openings. Grill
blockage may result in compressor failure.
Outdoor merchandisers: Locations shaded from sunlight are recommended for more economical operation.
Auto-defrost models: Leave sufficient space behind merchandiser to prevent the drain hose from being
kinked or obstructed. A blocked hose will not allow unit cooler condensate water drainage.
Indoor merchandisers: Locations must keep the area above and within full top cover clear from storage
items or from obstructions. As per above, location must provide good air flow for designed refrigeration
system. Auto-defrost glass door models: Remove condensate evaporator carton from inside merchandiser
and install evaporator on back of merchandiser per instruction sheet inside carton. (Screwdriver required)
Optional item installation: Refer to instruction sheet inside carton.
1. lectrical: The electrical voltage and frequency cycle at installation site must coincide with merchandiser
decal serial label. lectrical service connections must be in accordance with the National lectrical Code,
state code and any local code that may apply. All merchandisers are wired to a polarized power cord with
3-prong plug.
CAUTION: Improper use or removal of the grounding plug can result in risk of electrical shock.

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The merchandiser must be plugged into a 115 volt, 60 HZ grounded receptacle electrical outlet with a
circuit fuse or breaker. (See figure 1). The condensing unit data plate will indicate the maximum
fuse/breaker size. DO NOT use extension cords. xtension cords may decrease the voltage to the unit and
ultimately cause the compressor to fail.
NOTE: Some outdoor locations require ground fault interrupt (GFI) outlets. These outlets may trip
upon condensing unit start. Refrigeration equipment is exempt in some areas from GFI
requirements. Local electric codes should be checked.
Plug merchandiser power cord into lower receptacle of electrical outlet. The condensing unit will start, the
light will illuminate on glass door models, and unit cooler evaporator fans will start on Auto-Defrost
models. The condensing unit will continue to run until air temperature in cabinet is approximately +18° F.
If merchandiser has a condensate evaporator, plug evaporator power cord into upper receptacle of electrical
outlet and heater rod will heat.
2. Temperature Control: Cabinet temperature is maintained by cycling the condensing unit automatically
with a thermostat. On Auto-Defrost models, the thermostat is located on the left end of unit cooler cover.
On Cold Wall models, the thermostat is located on a bracket under the condensing unit cover. (The
thermostat for Low Profile Cold Wall models is located on bracket at upper rear interior).
The temperature is adjusted by turning the control knob. Turning the control knob fully counterclockwise
will shut off power to compressor. DO NOT readjusts the internal adjustments of the control without
consulting factory.

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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 and air channels require unrestricted air flow convection around packaged ice. Cold Wall
units should have ice stacked to allow air access to thermostat sensor located at upper rear interior.
CAUTION: Disconnect power plug before maintenance on electrical components to avoid
risk of electrical shock
1. Refrigeration: Clean refrigeration cover grill openings, condenser fins, and condenser fan
blades every three (3) months or more often if refrigeration is exposed to dusty environment.
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 alone creates restricted air flow
2. Defrosting: Frost forms on the evaporator when door is opened and warm air enters
merchandiser.
A.
Auto-Defrost (AD) vaporator: 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 a defrost timer which energizes a defrost heating element every four
(4) hours for 14 to 16 minutes.
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)
B. Cold Wall (CW) vaporator: Cold Wall merchandisers utilize the merchandiser's interior
wall surface as the refrigeration evaporator. Therefore, frost accumulation will occur on all
wall 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 wall and
refrigerant tubing and do irreparable damage. A drain plug is located under the ice pallet to
help allow water to drain.
C.
Condensate vaporator: Inspect operation and condition of evaporator every three (3)
months. The heating rod should be heating and examined for excessive corrosion. Failure of
the heating rod to heat properly can result in the drain pan water overflowing. Also,
accumulative dust buildup may limit proper operation of the unit.

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3. lectrical: Inspect each month all power harnesses for any cracks, abrasions or damage to
connection plugs. Replace any defective wiring or harnesses.
4.
Door(s): Inspect each month for component wear, function and secure attachment.
A.
Gasket(s) should be examined for tears or any other problems that would cause loss of seal.
Replace torn/worn gaskets to maintain correct temperature and refrigeration efficiency.
B. Hinges exposed to harsh environmental conditions may require a lubricant for ease of
operation. Spray a light penetrating oil on hinge pivot points to ease the work load and
extend life of hinge. Tighten any loose screws.

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5. Cleaning: Schedule yearly cleaning of merchandiser interior with solution of 8 tablespoons of baking
soda to 1 gallon of warm water. DO NOT use strong detergents, abrasive cleansers, solvents, wax or
polish as they are likely to leave objectionable odors which may be absorbed by the ice. Wash the
outside surfaces with a mild soap and warm water applied with a soft sponge or cloth. Wax exterior
to maintain appearance and extend life of paint.

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