Master Bilt BSD Series Benutzerhandbuch

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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.