15
Operating Instructions
1. General
Once water and electrical power have been connected, certain procedures
should be followed to assure safe and efficient performance of the freezer.
2. Check of Electrical Power
DO NOT OPERATE THE COMPRESSOR UNTIL POWER HAS BEEN
ON FOR AT LEAST FOUR HOURS. THIS WILL ASSURE THAT THE
CRANKCASE HEATER WIL L HAVE HAD TIME TO EVAPORATE ANY
LIQUID REFRIGERANT, WHICH MAY HAVE MIGRATED INTO THE
CRANKCASE DURING SHIPMENT.
3. Positioning of Service Valves
The freezer will have been shipped with all service valves closed. These
valves must be opened prior to operating the compressor. See Figure 1
for valve position during the various operating modes.
4. Operator Control Panel
Figure 3 shows the layout of indicator lights and switches on the Operator
Control Panel. When lit the green “POWER” light indicates the presence
of power in the unit. The red “LOW OIL PRESSURE” light, when lit,
indicates insufficient oil pressure available for proper compressor
lubrication. It can indicate lack of oil or a pump failure.
The “OPERATING MODE” switch permits the freezer to be pumped down
after use, or when the freezer is to be out of service for several days. This
switch should be placed in the “FREEZE” position during a freezing cycle.
The “HYDRAULICS” switch provides a means of opening (“DOWN”) the
plates to permit product loading and unloading. It permits a means of
closing (“UP”) the plates for freezing. With the switch in the “OFF” position
the plates can be held in a specific position, anywhere between fully open
and fully closed.
5. Refrigeration Mode
With the system’s power on (green “POWER” light lit) and the “Operating
Mode” switch in the “Freeze” position, the compressor should operate with
refrigerant flowing freely through the plates.
The “COMPRESSOR” switch should be in the “ON” position at all times
except when the freezer is to be out of service for more than a week. If