Nor-Lake General Laboratory Refrigerators Freezers User Manual

GENERAL LABORATORY

REFRIGERATORS AND FREEZERS

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 in the manufacturing facility and has been crated in accordance with transportation rules and
guidelines. Manufacturer is not responsible for freight loss or damage.

INSTALLATION

GENERAL

After the unit crate and crate base have been removed, locate the casters or legs found inside the
cabinet. Attach the casters or legs to the unit base by screwing them into the same threaded fittings
that were used to secure the crate base to the cabinet. Insure that the legs or casters are screwed
completely into the base.

If for some reason the doors are not squared up on the cabinet, the doors can be adjusted. Opening
the door(s) and loosening the screws that hold both the top and bottom hinges to the cabinet can
accomplish this. After adjusting the door so that it is aligned correctly, tighten the screws to securely
hold the hinges in place.

VAPORIZER INSTALLATION

The General Laboratory forced air models require the installation of the condensate vaporizer,
which is shipped inside the unit compartment. The vaporizer should be mounted to the cabinet
bottom. Reference View 1. In lieu of the vaporizer, these units can be plumbed to a floor drain
following local plumbing codes. The cold wall units do not use a vaporizer. Customer installation
is not required.

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Note: Disconnect power prior to
installation.

1. Connect the power cord to the vaporizer
and place it in the vaporizer bracket.

2. Attach the vaporizer bracket to the back
of the unit using the four screws as
shown, making sure the plastic drain
tube is in the vaporizer pan.

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LOCATION

The refrigeration system located at the top of
the cabinet requires free air access for
proper operation. Allow a minimum four-inch
clearance on the top, rear, and sides of the
cabinet. The cabinet should also be leveled
when it is placed in its permanent location.

View 1

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 to wire any unit. On permanently connected units, those not furnished with a
plug-in service cord, all inter-wiring between the electrical panel and the unit must be done in
accordance with the National Electric Code and all state and local codes. Refer to the serial tag for
all pertinent electrical information.

Observe all Warning Labels. Disconnect power supply to eliminate injury from electrical
shock or moving parts when servicing equipment.

GENERAL OPERATION

FORCED AIR UNITS

The General Laboratory forced air cabinets employ a unit cooler evaporator located inside the
cabinet as the heat-removing source. Through the refrigeration process, heat is captured in the
evaporator, transferred to the condensing unit on top of the cabinet, and expelled to the surrounding
outside air. It is extremely important to allow a four-inch clearance on the top, rear, and sides of the
unit for the refrigeration process to function properly.

Cold control adjustment

To increase or decrease the internal cabinet temperature, rotate the cold control, located on the unit
cooler, to the desired temperature.

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