Southbend 20120SB - Manual (Page 9)

SCHEDULED MAINTENANCE
9 Printed in USA 12/02 Refrigerated Base-Self-Contained © 2002
5. To recalibrate the thermometer, remove it from the
cabinet. Using a small, flat screwdriver, remove the
lens. Prepare an ice water bath and immerse the
thermometer bulb at least two inches into the ice bath.
WIthin 30 seconds the indicator dial should read 32
degrees Fahrenheit. If it does not, it needs to be
recalibrated. Do this by placing your index finger on
the opposite side of the needle that needs to move.
Then, using a flat screwdriver, turn the screw at the
center of the dial 1/4 of a turn in the direction you want
to move the dial. Repeat the procedure until the
needle is on 32 degrees. See Figure 4.1.
Figure 4.1 - Thermometer Calibration
Table 4.1 - Preventative Maintenance Action Index
1.
2.
3.
4.
Weekly
Monthly
Annually
Three-year Frequency
a. Inspect condenser coil to make certain that air flow is not
hampered and that it is clear of dust and debris.
a. Inspect and clear drain line.
b. Check the liquid refrigerant sight glass to make certain that
the system is completely charged.
c. Clean the interior of the cabinet with a mild soap and warm
water solution. Be certain to dry thoroughly.
d. Check both the condenser fan motor and the evaporator
fan motor to make certain that they are operational and that
the fans are tight and secure.
e. Clean door gaskets and breaker strips with a damp cloth.
f. Clean exterior of cabinet with mild soap and warm water.
Dry thoroughly.
a. Slide condensing unit from the refrigeration compartment
and check all joints and fittings for any signs of leaks or
fatigue.
b. Inspect electrical connections to confirm that there is good
contact and that wires are neither weakened nor frayed.
c. Check the integrity of the cabinet.
a. Replace door gaskets.
b. Inspect motor shafts for noise or wear.
c. Inspect electrical controls and wiring.
d. Inspect drawer slides.
e. Recalibrate thermometer.
Lower Temperature
Higher Temperature