8
REFRIGERATION SYSTEM
The refrigeration system is a single piece unit and is
hermetically sealed. In the DN55##/54##/2145
models it consists of a ½ horsepower compressor, two
roll up style condensing units with separate fans, the
condensation overflow pan and the evaporator. In the
DN35## models it consists of a ½ horsepower
compressor, with a single fin and tube style
condensing unit with one fan, the condensation
overflow pan and the evaporator. The evaporator is
located behind the panel on the right side of the
cooling compartment directly adjacent to the bottom
shelf. The remainder of the unit is located behind the
delivery bin, mounted to the bottom of the cabinet.
This unit is designed for easy removal and
replacement from the front of the vender as a
complete assembly. A mechanical thermostat
regulates the cabinet temperature. The bulb of the
thermostat is attached to the evaporator coils and
reads the temperature of the refrigerant inside the coil.
SHELF ASSEMBLY
Typically, there are 5 shelf assemblies in every
vender; however, this can vary depending upon the
configuration specified at the time of ordering. Each
shelf consists of either 6, 8, or 9 columns. Each shelf
is capable of holding a variety of products. The shelf
assembly consists of the tray, where all of the
following parts are mounted: Gate assembly, shelf
stabilizers and the slide/pusher assembly. These
items are discussed in detail below.
SHELF STABILIZERS
Some packages will have the tendency to become
unstable or bounce to the delivery bin when vended
due to the design of the bottom of the package. This
can lead to a product jam. The shelf stabilizer (the
clear Lexan tab at the front of the tray) is used to
prevent this from occurring by acting as an extension
of the shelf.
Unless otherwise specified at the time of ordering,
shelf stabilizers are installed on the C and D shelves
of the vender. The stabilizers that are installed on the
C shelf can also be used on the A and B shelves as
needed for product stability. The stabilizers installed
on the D shelf must be used only on that shelf as they
are longer and may interfere with the proper vending
of a column. Do not use shelf stabilizers on the
bottom tray as product jams may occur.
To install the stabilizers, the slide assembly must first
be removed from the column. The stabilizer is
inserted on the bottom of the slide assembly by firmly
pushing the square hole in the stabilizer onto the front
locking tabs of the slide. The slide is then installed
back into the column.
GATE ASSEMBLY
The gate assembly is mounted on the front portion of
the tray assembly and contains the vending
mechanism. Incorporated in the gate assembly are
the front and rear knuckle assemblies as well as the
product kicker.
In standby operation, the front knuckle is in the
blocking position, which holds the front (displayed
product) in position to be vended. The rear knuckle
assembly is in a flat position, which allows product to
enter the gate area, and the kicker is flush to the rear
knuckle assembly. A stainless steel pin is inserted
through the rear most portion of the front knuckle
assembly and connects to a solenoid plunger below
the tray. When a selection is made, the solenoid
energizes pulling the plunger toward the back of the
tray. At the same time the front knuckle is opened
into a flat position, the rear knuckle is closed to a
blocking position, holding the remaining product out of
the gate area, and the kicker is extended to firmly
push the front (displayed product) off of the tray. The
solenoid is energized for approximately 1-½ seconds
to allow ample time for the displayed product to be
ejected from the shelf. The solenoid is then released
and the front knuckle returns to the blocking position,
the rear knuckle and kicker return to their standby
position and the next product slides into the vend
(display) position.
SLIDE/PUSHER ASSEMBLY
The slide/pusher is located on the bottom of each
product column. Its purpose is to provide a slick,
friction resistant surface for the product to rest on.
The product pusher is mounted on the top of the slide
and incorporates a coil spring in the body that
attaches to the bottom of the slide through a slit. This
spring adds needed tension to insure that all products
in the column remain tight against each other and are
allowed to progress into the gate area.
Although these pushers reduce the effects of dirt and
grime, periodic cleaning and lubrication of the slides is
recommended. NEVER USE PETROLEUM BASED
CLEANERS OR LUBRICANTS ON THE
SLIDE/PUSHER ASSEMBLIES AS THEY MAY
BECOME BRITTLE OR DISCOLORED.
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