12
Duct
Duct Connector
Narrow Duct
3.
If using optional rear mounting plate (sup-
plied with plenum connector), install it to
back edge of floor opening (see Figure 7).
Reinstall plenum connector in floor open-
ing. A shim may be used, if necessary, to
ensure the furnace is level.
4.
Secure plenum connector to floor with two
flat-head fasteners at dimpled locations
(see Figure 8).
5.
Secure connector to duct by bending bot-
tom tabs under and up against duct sur-
faces (see Figure 9).
Figure 9. Plenum Connector Installation A
Figure 10. Alternate Plenum
Connector Installation B
Method B
1.
Attach tabs to sides of duct (one on each
side) using sheet metal fasteners or other
method, ensuring that the plenum is se-
cure and sealed to the duct (see Figure 10).
2.
Tape duct flap edges with an approved
tape for a leak-free joint.
Method C
1.
Score and cut top of metal duct as indicated in
Figure 11, Step 1 or Step 2. If using Step 1, also
cut out metal from the shaded area “A”.
2.
Fold the duct flap “B” up (see Figure 11,
Step 3).
3.
At the front-to-back of duct run (see Figure
Staple Folded Duct
Flap (typ) to side of
Plenum Connector
Duct
STEP 4.
Cut- Out
Area "A"
STEP 1.
"B"
"B"
Cut- Out
Area"A"
Fold Back Flap "B"
Fold Back Flap "B"
Top of Duct
"A"
"A"
"B"
"B"
Fold Back Flap"B"
Cut
Lines
Duct
Fold Back Flap"B"
STEP 2.
STEP 3.
Bend Plenum Connector Tabs Up
and Over- (along length of duct)
Duct
Flap "B"
Duct
Figure 11. Alternate Plenum Connector Installation C
TABS
DUCT
1. INSERT PLENUM CONNECTOR
INTO DUCT CUT-OUT
TABS
DUCT
2. BEND BOTTOM TABS OVER
AND ONTO THE UNDER-
NEATH DUCT SURFACE
