Vollrath Stoelting 100C, Руководство по обслуживанию

Страница: 35 / 52

27
SECTION 6
ELECTRICAL SYSTEM OPERATION AND ADJUSTMENTS
6.1 24 HOUR TIMER
The 24 hr. timer is used to eliminate refrigeration during
non-use hours. When properly set it will prevent build-up of
large ice crystals and/or build-up of ice on the agitator. The
timer is located behind the lower front panel. To program
the timer, rotate program disc in the direction of the arrows
to align the correct time with the time of day. Then pull out
for OFF time or push in for ON time. Each actuator is
equivalent to 15 minutes. Check for AM/PM centered
between 12 and 12 on rotating disc. At a 6:00 setting, the
indicator will point to AM or PM.
6.2 ELECTRONIC TORQUE CONTROL
The electronic torque control is a time delay that controls
the operation of the compressor. The electronic torque
control operates in unison with two micro switches (ON
and OFF) and the agitator drive motor. If the control is
viewed from the back of the freezer while the freezer is
operating, the following conditions of normal operation will
be evident:
WARNING
VIEWING THE FREEZER WITH ANY SIDE PANEL RE-
MOVED DURING OPERATION IS NOT RECOM-
MENDED, AS THE POSSIBILITY OF ELECTRICAL
SHOCK HAZARD IS GREATLY INCREASED. THIS PRO-
CEDURE HAS BEEN ADDED ONLY TO CLARIFY THE
THEORY OF OPERATION.
1. When the right hand arm of the control bracket contacts
the right hand micro switch, the compressor will start.
2. As the compressor continues to run, ice crystals are
being formed in the product cylinder. As the drive motor
torque increases due to the formation of ice crystals,
the left-hand arm of the control bracket will gradually
move to the right and contact the left-hand micro
switch. The compressor will SHUT OFF approximately
71 to 81 seconds after the arm maintains contact with
the micro switch. This prevents eratic freeze down and
rapid recycling of the compressor.
See Figure 38 for a visual description of the compo-
nents involved in this operation.
A. Consistency Adjustment
The tension spring (Fig.39), located on the right side of the
freezer, is used to adjust the product consistency. To
increase product consistency, increase the spring tension
by turning the eyebolt nut clockwise one turn. To decrease
product consistency, decrease the spring tension by
turning the eyebolt nut counterclockwise one turn.
NOTE
The tension spring is adjusted at the factory to
3-1/8 inches, (3-5/8 for the 2217G). If further adjust-
ment is necessary, turn the eyebolt nut one turn at
a time in the desired direction.
B. Micro Switch Removal
Should either the right or the left micro switch be found to
be defective, either switch can be replaced by performing
the following procedures:
WARNING
DISCONNECT FREEZER FROM ELECTRICAL
SUPPLY SOURCE BEFORE SERVICING.
Figure 38. Torque Control
3-1/16"
3-1/8"
(3-5/8" F257)
(Viewed from Back)
Left Hand (OFF)
Micro Switch
Å
Right Hand Control
Bracket Arm
É
Right Hand (ON)
Micro Switch
Ê
Ì
Left Hand Control
Bracket Arm
(Viewed from Right Side)
Figure 39. Tension Spring