Unpacking and Installation
10
Installation and Operation Manual
Explosion-Proof & FMS Refrigerator-Freezers
Figure 1: Sealing the Killark Box
How to Seal Killark® Box
Conduit with Fiber and Sealing
Compound to Help Protect
Against Explosions
(Explosion-Proof Units 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 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:
• 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.
Summary of Contents for 47747-222
Page 22: ...057 658 00 Rev B...
