L0118G
3-3
When the temperature falls to 4°F below the
temperature setting, the compressor and condenser
fan are turned off (Refer to Section 6.6).
Refrigeration Controls
1. The refrigeration system is operated through
the control board. The temperature sensor in
the cabinet relays the current temperature to
the control board.
2. If the temperature is above the setting that
has been programmed in by the user, the
control sends a 24VDC signal to the
refrigeration relay. The energized relay
closes to complete the high voltage circuit
that powers the compressor and the
condenser fan.
3. If the compressor should overheat, a thermal
overload removes power to the compressor
until it has cooled.
4. To protect against evaporator freeze-up,
after one hour of continuous running the
compressor will be shut off for 7.5 minutes to
allow for defrosting
5. When the temperature in the cabinet
reaches 4°F cooler than the temperature
setting, the control de-energizes the relay
breaking the circuit powering the
compressor.
6. The control will also shut off the compressor
if the door is opened. This is to prevent the
fan from drawing in outside air which may
freeze up in the evaporator.
7. After the compressor has shut down, the
control will wait until the compressor has
been shut down 3 minutes and if applicable,
the door has been closed 10 seconds before
restarting the compressor. The delay allows
pressure in the system to equalize.
3.6 TRAY RAILS
The rails are located inside the cabinet and are used
to support the trays. The rails are adjustable up and
down in 1” increments (Refer to Section 5.3).
3.7 TRAYS
Refer to section 5, and 10 for optional tray
accessories.
Vend Motors
Two types of motors may be used with this vendor.
The configuration of the machine will be different if all
of one or another is used, or if there is a mix. Sensit 3
(or simply S3) software can be used to best
advantage using motors designed for homing, but it
can be set to control motors without the home switch
feature. Motors may be mixed throughout the
machine, but each tray must have all motors of the
same type.
The vend motors are snapped into mounting holes on
the back of each tray. The motor is driven by 24 VDC
through a harness from the control board (Refer to
Section 4.2 and Section 5.10).
S3 Vend Motors
The S3 vend motors have a plastic case of which the
rear half is blue. S3 coupled motors can replace dual
helix motors. Where a dual helix motor is used,
replace it with a 23007 motor (having a blue and ivory
case for CCW rotation) and a 23007-01 motor (having
a blue and gray case for CW rotation) and reinstall
the helices. Use Tray Setup in Service Mode to
couple the motors in each column together, causing
them to turn at the same rate.
Coupled motors will always be stopped when either
one reaches the home position. If one motor runs
slightly faster, the slower will then be individually
driven to its home position. Depending on motor
configuration, the motors may jog twice to try to
dislodge hanging product.
Note: When not in Service Mode, and with door
open, press # to reset all switched motors to
Home position (Not available for non
switched motors. Refer to Section 6.8).
Motors already at home will not move.
Sensit II Vend Motors
A Sensit 2 (or simply S2) vend motor has a plastic
case which is all ivory in color. A dual helix motor has
a larger gearbox allowing two helices, one for CW and
another for CCW rotation, to be installed. The dual
helix housing only allows helices to be adjacent to
each other.
These motors have no home switches and have
been discontinued and replaced with S3 vend motors.
However, the S3 Control Board can be set to
accommodate these motors - see section 6.8 for
details on changing motor types.
Helices
There are four sizes of helices available,
approximately1 ½, 2 5/8”, 3”, and 4” in diameter.
There are several pitches available in each size, and
is determined by counting the number of product
openings in the helix (Refer to Sections 5.6 through
5.10.
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