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Be Advised
WARNING: Explosion-Proof Refrigerators and
Freezers do not come with line cords. They
require rigid conduit to be run directly in order to
seal off the fitting on thermostat housing. This
should be done by a licensed electrician and
follow all local and electrician and follow all local
electrical codes. If any questions pertaining to
electrical safety arises, please refer to article 501
of the National Electrical Code (NFPA70).
WARNING: UNLESS UNIT IS SPECIFICALLY
DESIGNED FOR COMBUSTIBLE OR
FLAMMABLE ATMOSPHERES DO NOT USE IN
THE PRESENCE OF FLAMMABLE OR
COMBUSTIBLE MATERIALS OR EXPLOSIVE
GASES. DO NOT USE IN THE PRESENCE OF
PRESSURIZED OR SEALED CONTAINERS—
FIRE OR EXPLOSION MAY RESULT CAUSING
DEATH.
CAUTION: Before connecting the final power
supply, check the electrical characteristics of the
unit nameplate to see that it is in agreement with
the power supplied. In addition, power should be
wired to the unit according to the electrical
schematic and all applicable codes. Only
qualified electricians should work on the electrical
portion of any unit Installation and service.
CAUTION: Storage by user of any materials in
the product that may cause a deterioration of the
product shall be deemed to constitute abnormal
and improper usage of the product for purposes
of this warranty.
CAUTION: Solutions used to clean coils or
neutralize bacteria growth must not be corrosive
to metals (enamel-coated steel) and materials
used in the maintenance of this equipment—
damage can result: use a soft cloth and warm
water to clean
How to Seal Killark
Conduit
To Seal Killark® Box Conduit with Fiber and Sealing
Compound to Help Protect Against Explosions (Explosion-
Proof Refrigerators and Freezers only):
The purpose of the procedure that follows is to build fiber
rope dams on the left and right hubs of the horizontal conduit.
The fiber rope damns will surround conduit wiring that is
housed inside the horizontal conduit. When both the left and
right fiber rope dams have been pressed into place, sealing
Flammable Material Storage and Explosion Proof Laboratory Refrigerators and Freezers
compound is poured between the two and forms into an
airtight plug.
All of this is done in order to prevent the very real threat of gas
entering the Killark box and a resulting serious explosion. After
the unit wires have been pulled through the horizontal conduit
the following procedure is required:
•
•
•
•
Note: KILLARK
Incorporated, Shelton, CT, USA.
Figure 1. Sealing the Killark Box
Note: Wires must be kept separated as shown in the
Figure 2
®
Box
Figure 2. Horizontal Conduit, Cutaway
Turn power off at the circuit breaker before proceeding.
Place a small amount of sealing compound granules,
enclosed, into a clean mixing vessel. Add small amounts
of water while stirring until a thick paste is formed, then
carefully continue adding smaller amounts of water until a
thick gravy consistency is achieved—NOT WATERY.
Discard any material that becomes too stiff to use. Never
attempt to restore workability by stirring in more water.
Locate silver Killark box, back/top-center of unit.
Unscrew conduit domed-cover.
®
is a registered trademark of Hub bell
Left Hub
Wiring
Right Hub
Installation |
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