Nor-Lake General Purpose Lab Freezer User Manual

LABORATORY FREEZER

Installation, Operation and

Maintenance Instructions

INSPECTION

When the equipment is received, all items should be carefully checked against the bill of lading to
insure all crates and cartons have been received. All units should be inspected for concealed
damage by uncrating the units immediately. If any damage is found, it should be reported to the
carrier at once, and a claim should be filed with the carrier. This equipment has been inspected and
tested at the manufacturing facility and has been crated in accordance with transportation rules and
guidelines. Manufacturer is not responsible for freight loss or damage.

Before connecting the freezer to the power supply, let it stand for approximately two hours to
reduce the possibility of malfunctions in the cooling system due to transport handling

INSTALLATION

GENERAL

After the unit crate and crate base have been removed, use a carpenter’s level to level the freezer
from front-to-back. Adjust the plastic leveling feet in front ½ bubble higher to ensure that the door
closes easily when left halfway open.

Note: It is extremely important that the freezer be level in order to function properly. If the freezer is
not properly leveled during installation, the door may be misaligned and not close or seal properly
causing cooling, frost or moisture problems. See the illustration below.

Choose a location near a grounded electrical outlet. For the most efficient operation, the freezer
should be located where the temperatures will
not exceed 110°F (43°C). Temperatures of
32°F (0°C) and below will not affect freezer
operation. Additional compressor heaters are
not recommended.

Allow adequate space around the unit for good
air circulation. A minimum of 3 inches (75 mm)

space on all sides of the freezer is required for
adequate air circulation.
Note: The exterior walls of the freezer may
become quite warm as the compressor works
to transfer heat from the interior. Temperatures
as much as 30°F (-1°C) warmer than room
temperature can be expected. It is particularly
important in hotter climates to allow adequate
space for air circulation around the freezer.

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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)

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 de­energize. 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.

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