Follett Symphony REF Series Manuale di installazione, funzionamento e assistenza - Pagina 7
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How the refrigerator works
The temperature control board and probe indicate when the refrigeration system is required to turn on and off. The
probe signals the controller to turn the refrigeration system on when the interior cabinet temperature rises to the
controller set point. The normally open contacts of the controller close, energizing the coil of the control relay.
Then the normally open contacts of the relay close, energizing the evaporator and condenser fan motors and the
compressor. The compressor uses a current-style starting relay and a starting capacitor to start the compressor
motor. The refrigeration system then removes heat from the cabinet interior and rejects it to the surrounding room
air. When the cabinet interior temperature falls by 3°F (controller will indicate 4°F), see explanation at the bottom
of page 6, the probe signals the controller to turn the refrigeration system off. The controller contacts reopen, de-
energizing the control relay coil. The relay contacts reopen, which de-energizes the evaporator and condenser fan
motors, and the compressor. Any accumulated frost on the evaporator coils melts during the off cycle. The
condensate drains to the plastic drain pan mounted above the condensing unit where it is evaporated by the heat
from the condensing unit.
Temperature control
The temperature control system is preset by the factory to maintain a cabinet temperature of 35°F - 38°F. If
desired the cut in temperature of the controller can be raised to as high as 50°F by following the instructions on
page 6 for changing the temperature set point. The 3°F cut out differential will be maintained regardless of the
controller set point.
Defrosting
REF Series undercounter refrigerators do not require manual defrosting. The unit cooler defrosts automatically
when the condensing unit is in the OFF cycle.
Cleaning
Use only non-chlorine-based cleaners. Cleaners containing chlorine can cause staining and pitting of the
!
stainless steel.
Interior – Using a sponge or soft cloth, clean unit with a non-abrasive, non-chlorinated, all-purpose detergent.
Exterior – Wipe exterior with a soft cloth in the direction of grain as needed. Stainless steel polish may be used to
enhance the finish of the unit.
Annual cleaning
Removal of dust and other particulates from air intake areas and the condenser is important for proper operation.
Some environments with large amounts of dust may require
more frequent cleaning.
1. Disconnect power to unit by turning switch on the lower
front panel to the OFF position, switching circuit breaker to
OFF position, and removing power cord from receptacle.
2. Remove lower front and rear panels (Fig. 6.1).
Note: Front louvered panel may be removed for more
frequent cleaning of the condenser as needed
3. Remove drain pan (Fig. 6.2).
4. Clean drain pan with a non-abrasive, non-chlorinated all-
purpose detergent.
5. Reinstall drain pan.
6. Use a vacuum cleaner with brush attachment to clean
condenser through lower front panel and compressor
motor and related parts through lower rear panel.
7. Reinstall lower rear and lower front panels.
Operation
Fig. 6
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