GENERAL INFORMATION
SERVICE (CONT.)
CONDENSATE EVAPORATION SYSTEM
Zero Zone remote cases can be equipped with an automatic condensate evaporation system. The system uses a pump and drain pan
located behind the kickplate and a condensate evaporator pan mounted on the top of the case.
Condensate water and any liquid spilled in the case drains out into the drain pan. The pump is equipped with a oat that turns the
pump on when there is a sufcient liquid level. Liquid is pumped through a plastic hose through a check valve and into the condensate
evaporation pan. The evaporation pan is equipped with a heater and a oat switch to turn on when the heater is submerged in liquid.
When the heater is energized, the pan will be extremely hot and should not be touched. The pump and condensate pan should be
cleaned regularly. Any spilled product should be cleaned to prevent odors.
AIR CURTAIN VELOCITY
Air curtain velocity is affected by stocking levels, coil frost loads, temperature and fan condition. The measurement method also affects
the reading. Zero Zone recommends using an Alnor Velometer Jr., set to the 0-to-800 fpm range. Air velocity should be measured at the
back edge of the discharge air honeycomb, at the center of the middle door in the case (other doors have slightly lower velocity). A typical
low temp velocity reading is 400 to 500 feet per minute in a fully-packed low temp case, after the case has defrosted and pulled down
to operating temperature. Air curtain velocity in a partially-packed display case is signicantly lower because more air exits the back wall
duct holes. In medium temp cases, the velocity should be 300 to 400 feet per minute after the case has defrosted and pulled down to
temperature.
FAN REMOVAL
1. Turn off power to fans. Remove coil cover.
2. Unplug fan from fan power supply plug located on the front face of the fan housing.
3. Remove the fan blade nut and fan blade.
4. Remove the two mounting bolts and remove the fan assembly from the fan housing.
5. Remove the three fan motor mounting screws from the back of the fan motor.
6. Reverse steps 1 - 5 to install.
LED POWER SUPPLIES AND BALLASTS
Most Zero Zone case ballasts or LED power supplies are located in the door mullion. Ballasts for the 1-door and WA, are located behind
the kickplate.
FLUORESCENT LIGHTING
These systems use a lens to direct light output evenly across the shelves. Turn off power before servicing the lamps. The lens must be
removed to access the lamp. The lens must be replaced after servicing for proper operation. Detailed information is contained in the door
instruction booklet.
22 • General Information
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