9
the condensate evaporator’s heating element should be
checked routinely. Failure of the element could result in an
over-flow condition for the assembly’s drain pan. A simple
check of the heater would be a touch test of the surface
temperature of the assembly’s housing. The condensate
evaporator’s heating element is energized continuously so
the surface of the housing should always be hot to the touch.
Solid Door Models and Maintenance:
Merchandisers designed for outdoor use will have a metal
clad door(s) that have been insulated with the same urethane
foam insulation as the cabinet. The exterior metal is stucco
embossed to hide minor impacts and is coated with a
fluorocarbon paint system. This paint system was designed
to withstand years of outdoor exposure. For routine cleaning
of the door’s exterior surface, a mild detergent diluted in
warm water should be adequate.
Decaling Recommendations Solid Door:
a) Use a decal with a 2-mil (0.05mm) cast vinyl substrate.
Cast vinyl contains less memory than a calendared vinyl
or polyester substrate and will conform to the embossed
surface with the least amount of stress on the decal’s
adhesive.
b) The decal’s adhesive should have a minimum peel
strength rating of 80 oz. / inch (0.875 N / mm).
c) Clean the surface of the door with isopropyl alcohol and
either air dry or wipe with a clean cloth.
d) Heating the surface of the door immediately before
applying the decal will aid the adhesive bond of the
decal. Never apply a decal to a surface that is colder than
50°F (10°C).
e) Use a soft roller or plastic squeegee to apply the decal
and press it onto the embossed surface of the metal.
Applying a small amount of heat to the surface of the
decal will aid in this process.
Door Gaskets and Hardware:
Routine inspection of the door gasket seal and the action of
the door’s hinges is recommended. The upright door
(measuring 27” x 46”) (68.58 cm x 116.84 cm) utilizes the
same Kason Model 220 hinge model. The gasket has a
barbed dart that inserts into a slot in the surface of the door
frame. Damaged or torn gaskets may allow infiltration of
warm, moist air into the merchandiser and should be
replaced. See Figure 1 for door gasket replacement.
A simple test of the spring-load tension is to open the door
just enough to insert two fingers between the surface of the
cabinet and the handle side of the door. When the fingers
are withdrawn, there should be enough tension set on the
hinge spring to slowly move the door to a closed position. If
the door does not move from this two-finger location, it is
likely that either the spring-load requires re-tensioning or
lubrication. If the door moves part way from the two-finger
location but stops short of the cabinet, the compression of
the gasket along the hinge side of the door should be
checked. If there is too much compression, the door will
bind when closed and should have its hinge-mount location
checked and possibly adjusted. Removing the hinge covers
will expose the spring-loads for tension adjustment or
removal. Removal of the spring-load will expose the hinge-
adjustment plate and mounting screws should hinge
adjustment be required. See Figure 2 for instructions on
how to install or adjust the spring cartridge.
Vending Calibration:
Routine calibration is recommended every time the unit is
empty or near empty before reloading Ice. This should be
done once a month to insure proper inventory.
Follow steps from page 5 under Calibrate Scale
R290 Refrigeration Service:
Danger! Do not attempt to open the refrigeration
system! (R290) Propane is a flammable and explosive
gas.
Like other refrigeration systems, a unit charged with R290
is not serviceable on a consumer level. The use of special
tools and proper procedures performed by licensed, trained,
and qualified professionals is required.
R290 General Information:
R290 refrigerant is flammable, but the amount of refrigerant
used is relatively small and the chance of ignition in the
event of refrigerant leak is extremely low. Millions of
commercial and residential refrigeration products are using
similar, if not exact, refrigerants worldwide.
R290 refrigeration grade propane has a much higher purity
than standard propane. The higher moisture content of
standard propane will damage a refrigeration system.
Standard propane also has a scent added (another impurity)
that refrigeration grade materials do not.
R290 is a high-performance refrigerant. The superior
thermodynamic properties of R290 compared to R404a and
R134a allow for a reduced charge per system and lower
system energy use.
Most important, it’s eco-friendly! R290 is classified as a
hydrocarbon (HC) refrigerant, a natural non-toxic
refrigerant, and the top alternative to hydrofluorocarbon
(HFC) refrigerants. R290 has an Ozone Depletion Potential
(ODP) of 0 and an ultra-low Global Warming Potential
(GWP) of 3.
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