Zero Zone CRYSTAL MERCHANDISER RVMC30D - Display Case Operation; Temperature Control Settings; Defrost Cycle Settings; Case Thermometer Installation

22 • Installation & Operation
INSTALLATION & OpERATION
Operation
Refer to the case spec sheet for btuh requirements and electrical requirements. Operate the case at the following settings to maintain product
temperature of 41°F or below, per food safety regulations. Refer to the line sizing table (See Figure 30 on page 23).
CASE OPERATION - TEMPERATURE INTERNAL CONTROL OPTIONS
RACK SYSTEM
CONDENSING UNIT
(R-404A MEDIUM TEMP)
RETURN AIR
TEMPERATURE
DISCHARGE AIR
TEMPERATURE
Evaporator Temp: +28°F
Condensing Unit Cut-In: 74 psig Return Air Cut-In: +37°F Discharge Air Cut-In: +34°F
Condensing Unit Cut-Out: 62 psig Return Air Cut-Out: +33°F Discharge Air Cut-In: +30°F
NOTE: Superheat Setting +8°F. Contact Zero Zone if using high-glide refrigerant.
CASE OPERATION - DEFROST SETTINGS
DEFROST SETTINGS
Off-Cycle 3 Per Day 45 Minute Duration
Electric 2 Per Day 30 Minute Duration
Case Thermometers
The cases are shipped with 2 thermometers. One thermometer is factory-mounted to sense the discharge air stream (rear duct). A second NSF
thermometer is shipped loose and should be installed in the warmest product location as required by NSF. Specic eld installation instructions
are packaged with the NSF thermometer.
Cleaning
Although each Zero Zone display case is thoroughly cleaned before shipping, the cases should be thoroughly cleaned again before start-up and
routinely thereafter to maintain a clean appearance. With just a few minutes of cleaning each week, the case will remain in top condition.
1. Do not use high-pressure water or steam to clean the interior or any components.
2. Do not wash fan motors. A damp cloth can be used to wipe the fan motors. Cover the fan motors with a plastic bag when washing the case.
3. Wipe out the case interior using mild detergent and warm water (never an abrasive cleaner).
4. Clean all glass doors, windowed ends, and mirrors using glass cleaner. Cleaning interior glass reduces fogging and increases visibility.
Do not use any cleaning products containing silicon for anti-fog.
5. The drain pan can be ushed after removing bottom wire racks. The coil can be cleaned after removing the false ceilings, fans, and fan
plenums.
6. If the case is equipped with a condensate pan and pump, the drain should be blocked before washing coils. Water can be removed with a
shop vacuum.
7. Coils may be cleaned with a garden hose or pails of water. If the case is equipped with a condensate pan and pump, cases should be
cleaned with a minimal amount of water so the evaporator, pump, and drain pans do not get overlled.
8. The case drain should frequently be cleaned of debris and price tags to prevent clogging. If water is rising, check if the drain is clogged.