Master Bilt BSD User Manual

BSD SERIES

REFRIGERATORS AND FREEZERS

Installation, Operation and

Maintenance Instructions

INSPECTION

When the equipment is received, all items should be carefully checked against the bill of
lading to insure all crates and cartons have been received. All units should be inspected for
concealed damage by uncrating the units immediately. If any damage is found, it should be
reported to the carrier at once, and a claim should be filed with the carrier. This equipment
has been inspected and tested at the manufacturing facility and has been crated in
accordance with transportation rules and guidelines. Manufacturer is not responsible for
freight lo ss or damage.

INSTALLATION

GENERAL

If casters are installed, care should be taken when removing the unit from the crate base.
The unit is heavy and can present a hazard if not handled with care. Remove the unit crate
and crate base. Discard hardware used to secure the cabinet to the crate base. Ensure that
at least two persons are available to install the casters. Lay the cabinet on its back to
create access to the cabinet bottom. Attach the casters to the cabinet base suing the
factory installed screws as shown below.
Remove the ¼ x 20 x ¾ screws (4 per
caster) that are factory installed. Position the
caster and reinstall. Ensure that the locking
casters are installed on the front of the
cabinet. After installation is complete, return
the cabinet to its upright position. The
cabinet should set in the upright position for
at least one hour prior to energizing. This is
required to allow the refrigeration to settle to
its normal state. The cabinet should also be
levelled when it is placed in its permanent
location.

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If the doors are out of alignment on the cabinet, the doors can be adjusted. This can be
accomplished by opening the door(s) and loosening the screws that hold both the top and
bottom hinges to the cabinet. After adjusting the door so that it is aligned correctly, tighten
the screws to securely hold the hinges in place.

ELECTRICAL

Check the proposed outlet to be used to insure that the voltage, phase and current carrying
capacity of the circuit from the electrical panel correspond to the requirements of the
cabinet. NEVER use an extension cord to wire any unit. On permanently connected units,
those not furnished with a plug-in service cord, all inter-wiring between the electrical panel
and the unit must be done in accordance with the National Electric Code and all state and
local codes. Refer to the serial tag for all pertinent electrical information.

Observe all Warning Labels. Disconnect power supply to eliminate injury from
electrical shock or moving parts when servicing equipment.

GENERAL OPERATION

The refrigerators and freezers employ a unit cooler evaporator located outside the cabinet
as the heat removing source. Through the refrigeration process, heat is captured in the
evaporator, transferred to the condensing unit on top of the cabinet, and expelled to the
surrounding outside air. It is extremely important to allow a four (4) inch clearance on the
top, rear, and sides of the unit for the refrigeration process to function properly.

These refrigerators and freezers utilize a programmable controller to control the
temperature and defrost settings. The controller, which is located on the facade of
the unit, is factory set. Please see the default settings sheet and separate
instructions that are included on the operation of this controller.

REFRIGERATORS

During the operation of a refrigerator unit, frost will periodically form on the coil surface.
Each time the compressor cycles "off", the evaporator fans will continue to run, which will
keep the internal temperature uniform and at the same time remove any frost build up on
the coil. The water produced will collect in the unit cooler drain pan and travel down the
drain tube to the condensate vaporizer.

FREEZERS

After shutting the door on freezer models, a short amount of time must be allowed before
the door can be reopened. This is due to the tight seal maintained between the door and
the cabinet. Waiting a few moments for the pressure to equalize permits the door to be
opened easily.

A positive defrost is required to remove frost from the coil in freezer models. This is
accomplished by energizing heaters during the defrost cycle that are positioned on the coil
surface. The programmable controller is factory set to allow four defrosts per day.

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As the preset defrost time is reached, the controller automatically terminates the
refrigeration process by turning off the condensing unit and unit cooler fan motors, and
energizes the defrost heaters. As the coil temperature increases, the frost begins to melt
producing water which runs down the coil to the unit cooler drain pan and exits through the
drain tube to the vaporizer. After all the frost has been removed and the coil temperature
reaches approximately 50°F [10ºC], the defrost is terminated through the action of the
defrost termination control located on the unit cooler, and the refrigeration process
resumes. In order to insure that any excess water remaining on the coil is not sprayed into
the cabinet interior, and all heat generated by the defrost is removed, the unit cooler fans

will not operate until the coil temperature reaches approximately 25°F [-4ºC].

GENERAL MAINTENANCE

PERIODIC CLEANING

Beginning with the initial installation, the interior surfaces of the cabinet should be
periodically wiped down with a solution of warm water and baking soda. This solution will
remove any odors from spillage that has occurred. The exterior of the cabinet should also
be cleaned frequently with a commercial grade of glass cleaner.

Monthly cleaning of the condenser will aid the heat transfer characteristics of the
refrigeration system and increase its efficiency. To accomplish this, remove the cover panel
from the cabinet and use a wire brush to loosen any dirt particles that are attached to the
fins. Use a vacuum cleaner to remove the loosened particles. Failure to keep the

condenser coil clean and clear of obstructions could result in temperature loss and
damage to the compressor.

All moving parts have been permanently lubricated and will generally require no
maintenance.

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