Remove the front two enclosure gland
plates. The duct assembly is used to
mark the bottom of the enclosure for the
bottom cutout.
Temporarily install the bottom ductwork
as shown in Photo 25. Use the inside of
the ductwork to mark the bottom of the
enclosure for the opening. Alternately,
drawing 175R5639 can be used.
The bottom duct assembly pieces are
shown in Photo 22. Refer to drawing
175R5631, Sheet 3. Install the gasket as
shown. Assemble the bottom duct less
the cover. Assembly includes the mount-
ing of 3 angle brackets on the front and
sides of the partially assembled bottom
duct. The bottom duct collar is bolted to
the duct using 3 -T25 screws in the outer-
most holes of the brackets. Tighten
screws to compress the gasket. Refer-
ence Photo 23.
Photo 22. Bottom duct pieces
Photo 23. Bottom duct partially assembled
Photo 24. Completely assembled bottom
duct work
Photo 25. Duct work temporarily in-
stalled to mark cut-out on the gland
plate
Instruction No: 175R5640 V3
Aug 13, 2008
Page 8
