Master Bilt BSD Series - Manual (Page 3)

3 4/07
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.