Nor-Lake General Purpose Lab Freezer - Manual (Page 2)

ELECTRICAL
Check the proposed outlet to be used to insure that the voltage, phase, and current carrying
capacity of the circuit from the electrical panel correspond to the requirements of the cabinet.
NEVER use an extension cord or adapter plug to wire any unit. Refer to the serial tag for all
pertinent electrical information.
The freezer must be plugged into its own 115 volt, 60 Hz, single phase outlet. The power cord of
the freezer is equipped with a three-prong grounding plug for protection against shock hazards. It
must be plugged into a properly grounded three-prong receptacle. The receptacles must be
installed in accordance with local codes and ordinances.
If voltage varies by more than 10%, freezer performance may be affected. Operating the freezer
with insufficient power can damage the compressor.
To prevent the freezer from being accidentally turned off, do not plug the unit into an outlet
controlled by a wall switch or pull cord. Do not pinch, knot or bend the cord in any manner.
Observe all Warning Labels. Disconnect power supply to eliminate injury from electrical
shock or moving parts when servicing equipment.
OPERATION
Cool Down Period
For safe storage of product, allow a minimum of four hours for the freezer to cool down completely.
The freezer will run continuously for the first several hours.
Temperature Control
The temperature control is located inside the freezer. The temperature is factory preset to provide
satisfactory product storage temperatures. The temperature control is adjustable to provide a range
of temperatures for any desired application. If a colder temperature is required, turn the temperature
control knob toward COLDEST and allow several hours for temperatures to stabilize between
adjustments. The Automatic Freeze Control feature will maintain proper interior freezer temperature
even when the ambient exterior temperature drops to 10°F (-12°C).
Power On Light
The Power On light indicates that the freezer is properly connected to electrical power. The light is
energized even when the temperature control is turned to OFF. If the light goes out, refer to the
Maintenance Service and Analysis Guide.
Temp Alarm (Audible or Audible with Warning Light)
2
12/10 Rev. B 138707
This feature is designed to provide a warning of a possible malfunction. If the product temperature
rises to an unsafe level for long-term storage, the buzzer
will sound. The red light, if equipped, will energize. The
Temp Alarm feature operates on laboratory/facility
electricity. If power fails, the alarm will not function. An
On/OFF switch allows the user to deactivate the Temp
Alarm when not required. The freezer is shipped with the
Temp Alarm in the OFF position. After the freezer has run
for at least four hours, the red light, if equipped, will de-
energize. The Temp Alarm may then be activated without
the alarm sounding. Press the ON switch to activate the
Temp Alarm. Press OFF to deactivate the Temp Alarm. If
the alarm sounds, ensure that the freezer is properly
leveled and the door closes freely and seals properly. If a
malfunction is suspected, notify an authorized service
technician immediately.