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This section is intended to provide maintenance personnel
with a general understanding of the machine adjustments.
It is recommended that any adjustments be made by a
qualifi ed person.
4.1
DRIVE BELT TENSION ADJUSTMENT
To check belt tension, refer to Figure 4-1 and follow the
steps below:
Hazardous voltage
Make sure the machine is off when disassembling
for servicing. The machine must be disconnected
from electrical supply before removing any access
panel. Failure to disconnect power before servicing
could result in death or serious injury.
A.
Remove the back panel.
B.
Use a Burroughs Belt Tension Gauge to set the
tension for the drive belt. Set the belt tension to
35-40 lbs.
C.
If an adjustment is necessary, loosen the four
motor plate retaining nuts, adjust belt tension
then retighten the four nuts.
D.
Using a straightedge, check that the drive motor
pulley is aligned with the speed reducer pulley.
Align the pulley if necessary.
Belt life will be increased if new drive belts are
tightened after two or three weeks of operation.
Figure 4-1 Belt Tension Adjustment
2940 Hwy 14 W, Rochester, MN 55901
MAINTENANCE AND ADJUSTMENTS
WARNING
NOTE
SECTION 4
4.2
CONDENSER CLEANING (AIR-COOLED
MACHINES)
The F231 has an air-cooled or water-cooled condenser.
The air-cooled condenser is a copper tube and aluminum
fi n type. Condensing is totally dependent upon airfl ow. A
plugged condenser, or restrictions in the louvered panel will
restrict airfl ow. This will lower the capacity of the system
and damage the compressor. The condenser must be
kept clean of dirt and grease. The machine must have a
minimum of 3" (7.6 cm) of ventilation on the sides of the
unit for free fl ow of air. Make sure the machine is not pulling
over 100° F (37° C) air from other equipment in the area.
The water-cooled condenser is a tube and shell type. The
condenser needs a cool, clean supply of water to properly
cool the machine, inlet and discharge lines must be 3/8"
I.D. minimum.
The air-cooled condenser requires periodic cleaning. To
clean, refer to the following procedures.
A.
Visually inspect the condenser for dirt.
B.
If the condenser is dirty, place a wet towel over
the condenser.
C.
Using compressed air or CO
dirt from the back of the condenser. Most of the
dirt will cling to the wet towel.
D.
An alternative method is to clean with a condenser
brush and vacuum.
If the condenser is not kept clean, refrigeration ef-
fi ciency will be lost.
4.3
PREVENTATIVE MAINTENANCE
It is recommended that a preventative maintenance
schedule be followed to keep the machine clean and
operating properly. The following steps are suggested as
a preventative maintenance guide.
The United States department of agriculture and the food
and drug administration require that lubricants used in
food zones be certifi ed for this use. Use lubricants only
in accordance with the manufacturer's instructions.
A.
Daily checks
Check for any unusual noise or condition and
repair immediately.
B.
Monthly checks
Check the condenser for dirt and clean if
necessary.
C.
Quarterly Checks
Check drive belts for wear and tighten belts if
necessary.
11
tank, blow out the
2
NOTE
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