Friedrich 24,000 BTU/h - Manual (Page 10)

After the rough cut opening is prepared, you are ready to assemble the two wall plenum parts. Before
caulking and permanent attachment, dry fi t the outside plenum into the rough opening and check for fi t
and level. Caulk (silicone recommended ) the parts well and insert them into the wall as shown.
A) Apply caulk and insert Outside Part A into the hole.
B) Apply caulk and insert Inside Part B into Part A. Be sure that Part A does not back out of the wall hole.
Figure 9
Plenum Installation
NOTE: Proper header and wall penetration must conform to all national and local building codes.
Proper Header
Proper
Flashing
Proper Flashing
Proper Caulking Outside
Wall
Proper
Caulking
Architectural louver VPAL2
mounted on the outside
wall plenum (Part A)
Inside Wall Plenum (Part B)
8
Caulk all 8 flange
corners and unused
holes
Install anchor screws approxima-
tely four inches from the top and
bottom of the plenum. Do not
make penetration through the top
or bottom of the plenum