Zero Zone RVZC30, Инструкция по установке и эксплуатации

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RVZC30 (and BB/T/TBB/WA), RVZP30 (and BB/T/TBB/WA), RVC24
31
0407
USER INFORMATION
Cleaning
The case should be thoroughly cleaned before start-up and
routinely thereafter to maintain a clean appearance. Use mild
detergent and warm water (never an abrasive cleaner) to wipe
out the inside of the case. Wash down all glass doors with glass
cleaner. Do not use any products containing silicon on anti-fog
glass coatings. Clean interior glass reduces fogging and in-
creases visibility. The case will remain bright and sparkling with
just a few minutes of cleaning each week. Internal components
can be cleaned after removal of access panels. The case drain
should be regularly cleared of debris and price tags.
Do not use high-pressure water or steam to clean the interior.
Shelf Location
The shelves are adjustable in 1” increments on cantilever shelf
cases and 1/2” increments on pilaster cases and may be lo-
cated in any position for best display advantage.
Be sure shelf clips or brackets are completely seated before
installing the shelf.
The shelf brackets are stamped with “R” for Right and “L” for
left to aid installation.
Shelves
Zero Zone manufactures many different styles of shelves, bas-
kets and product stops. The shelves and baskets are placed on
the shelf brackets or on pilaster shelf clips. Baskets used in
place of shelves in a pilaster case are deeper than the shelves
used at the bottom of the case. Some of the baskets may be
reversed and used as a typical shelf.
Loading the Case
The case may be loaded with merchandise after it has been
operated for at least 24 hours with correct case temperature
and proper control operation. While loading the shelves, leave
an air space between the top of the merchandise and the shelf
above it so the customer can remove the merchandise. The air
space allows an air curtain on top of the product. Product should
not extend beyond the front of the shelves or block the return
air grill.
The shelf loads are as follows:
Cantilever typical load 170 lbs. maximum load 235 lbs.
Pilaster typical load 180 lbs. maximum load 250 lbs.
Some deflection may occur under higher loads.
Light Switch
The light switch is located inside the right hand door. Turn the
light switch off during the initial case temperature pull down to
prevent the case lights from cycling off and on. Always turn the
lights off when replacing lamps.
Case Thermometer
The cases are shipped with 2 thermometers. One thermom-
eter is factory mounted in the discharge air stream. The sec-
ond thermometer is shipped loose and should be installed in
the warmest product location. Specific instructions are pack-
aged with the shipped loose thermometer.
SERVICE
See Figures 26 and 28 for the typical component layout of the
30" door case. See Figures 27 and 29 for the typical compo-
nent layout of the 24" door cases.
The cart bumper must be removed to gain access to the drain
clean out and electrical connection. Disassemble the bumper
and kick rail by removing the 2 or 3 metal screws located in the
kick rail. The bumper assembly can be lifted up and removed
from the case. The kick plate can be removed, exposing the
electric tray cover and drain (Figure 14).
Evaporator
The evaporator coil, located at the rear bottom of the case, is
factory assembled with distributor, expansion valve, and other
refrigeration components. To inspect the coil, remove the cen-
ter or left of center coil cover. A small inspection port is located
at the rear of the case. To inspect the entire coil, remove the
remaining coil covers and raise the evaporator cover.
Expansion Valve
Unless otherwise specified, a superheat adjustable externally
equalized thermostatic expansion valve with a removable strainer
and pressure limiting charge is mounted to the evaporator
coil. The valve is not preset. Adjust the superheat setting for
maximum coil effectiveness. Typical superheat settings are be-
tween 6°F and 10°F. Close coupled systems should use the
higher superheat setting to minimize the chance of liquid flood
back. To adjust the expansion valve, remove the right end coil
cover. Remove the cap from the bottom of the valve. When
looking at the valve stem end, turn the valve stem
counter-
clockwise to decrease superheat. Turn the valve stem clock-
wise to increase super heat. Measure the suction line tem-
perature at the expansion valve-sensing bulb and compare it to
the suction temperature corresponding to the saturated pres-
sure. Make sure that line pressure drop is taken into account.
Turn the valve stem only 1/4 turn at a time and allow sufficient
time (20 to 30 minutes) for the valve to settle before making