Nor-Lake LABORATORY REFRIGERATORS AND FREEZERS User Manual

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 if applicable
found inside the cabinet (casters may be pre-installed). 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.

For shipping purposes, the condensing unit compressor is secured on some of the Laboratory
Freezer models. Remove the spring clips and loosen the mounting bolts prior to operation.
See the label attached to the condensing unit if applicable.

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 Extra Low Temperature Freezers 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. For those models equipped with a hot gas vaporizer, field installation is not
required.

1 08/07 Rev. A 123952

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.

LOCATION

The refrigeration system located at the top of the
cabinet requires free air access for proper operation.
Allow a minimum four (4) 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. Refer to the serial tag for complete physical
specifications.

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

The laboratory refrigerators and freezers 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 (4) inch clearance on the top, rear, and sides of the unit for
the refrigeration process to function properly.

These refrigerators and freezers utilize a programmable controller to control the temperature and
defrost settings. The controller, which is located on the facade of the unit, is factory set. Please see
the default settings sheet and separate instructions that are included on the operation of this
controller.

2 08/07 Rev. A 123952