Nor-Lake COLD WALL EVAPORATOR MILK COOLERS - Manual (Page 3)

03/13 004728 Rev. E 3
GENERAL OPERATION
The milk coolers are cooled entirely by convection as a result of copper coils completely
encircling the perimeter of the storage compartment. During the refrigeration process, heat
is removed through the evaporator tubing and expelled through the condensing unit. It is
important that the flow of air through the side louvers is not restricted in order to ensure the
condensing unit operates properly. Under normal operating conditions, any frost that might
accumulate on the walls during the "on" cycle of the condensing unit may melt during the
"off" cycle. Drains are installed in all milk coolers to accommodate melting frost.
The refrigeration system on this cabinet uses a temperature thermostat that senses the cut-
in and cut-out temperatures of the cold wall evaporator coil. The temperature can be
adjusted by turning the thermostat control knob which is located behind the louvered side
panel.
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 glass cleaner or with mild soap and water.
Never, under any circumstances, use an abrasive cleaner or alkaline solution.
Monthly cleaning of the condenser will aid the heat transfer characteristics of the
refrigeration system and increase its efficiency. To accomplish this, remove the louvered
panel from the cabinet and use a wire brush to loosen any dirt particles that are attached to
the fins. After this is accomplished, use a vacuum cleaner to remove the loosened
particles.
All moving parts have been permanently lubricated and will generally require no
maintenance.