Stoelting U421/U444 - Manual (Page 33)

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A. Remove either side and back panels.
B. Press firmly on one belt. Figure 29.
Figure 30. Belt Adjustment
C. When the tension is properly adjusted, the outside
of the depressed belt should be approximately in
line with the inside of the other belt.
D. If an adjustment is necessary, loosen the four motor
plate retaining nuts, adjust belt tension then re
tighten the four nuts.
NOTICE
Belt life will be increased if new drive belts are tight-
ened after two or three weeks of operation.
4.8 CONDENSER CLEANING (AIR-COOLED
FREEZERS)
The condenser requires periodic cleaning. To clean the
condenser, refer to the following steps:
NOTICE
Some freezers have a condenser filter, to clean re-
move and wash in warm soapy water. Rinse in clean
water and shake dry, taking care not to damage
filter in any way.
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 CO2 tank, blow out the dirt
from the back of the condenser. Most of the dirt will
cling to the wet towel.
CAUTION
This procedure emits a loud noice. Wear hear protec-
tion to prevent hearing loss.
D. An alternative method is to clean with a con-
denser brush and vacuum.
NOTICE
If the condenser is not kept clean, loss of refrig-
eration efficiency will result.
4.9 PREVENTATIVE MAINTENANCE
It is recommended that a preventative maintenance sched-
ule be followed to keep the freezer clean and operating
properly. The following steps are suggested as a preven-
tative maintenance guide.
WARNING
Never attempt to repair or perform any maintenance
on freezer until all main electrical power has been
disconnected.
The United States Department of Agriculture and the Food
and Drug Administration require that lubricants used in
food zones be certified 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. Month Checks
1. Check drive belts for wear and tighten belts if
necessary. (Refer to Section 4.7.)
2. Check the condenser for dirt. (Refer to Section
4.8).
WARNING
Never attempt to repair or perform any maintenance
on freezer until all main electrical power has been
disconnected.
4.10 EXTENDED STORAGE
Refer to the following steps for winterizing the freezer or for
storing the freezer over any long period of shutdown time.
A. Clean thoroughly with warm detergent all parts that
come in contact with mix. Rinse in clear water and
dry all parts. Do not sanitize.
NOTICE
Do not let cleaning solution stand in freezer barrel
or mix pump during the shutdown period.
B. Remove, disassemble, and clean the front door,
auger shaft, and mix pump. Leave disassembled
during the shutdown period.
C. Place plastic auger flights in a plastic bag with a
moist paper towel. This will prevent flights from
becoming brittle if exposed to dry air over an
extended period of time (over 30 days).