Installation Manual

16
2. Install the duct connector with the bottom tabs extending
into the supply air duct.
3. Bend the tabs on the bottom of the duct connector
upwards and as tight as possible against the supply
air duct (Figure 13).
4. Secure the duct connector tabs to the supply air duct
with staples (3 minimum) or sheet metal screws (2
minimum).
Installing Screw-Down Duct Connectors
1. Apply a bead of caulking, mastic, or other approved
sealant around bottom side of 1/2” flange and restrictor
plate (when applicable).
2. Locate the screw down duct connector over the duct
and carefully lower it into place.
3. Secure the duct connector to the floor using flat head
screws or nails. NOTE: Make sure the duct connector
flanges stay in contact with the duct.
4. Secure the plenum to the duct using sheet metal screws
making sure a tight seal is made between the duct and
the duct connector. NOTE: Additional screws may be
added if required.
5. Cut away along edge of flange allowing the center to
drop into the duct. NOTE: Remove section of duct with
caution, as edges will be sharp.
Round Duct Connector Installation
1. Install and center the duct connector in the floor opening.
2. Install the mounting plate (Figure 15) under the back
side of the duct connector. NOTE: Make sure the screw
holes are aligned in both components.
3. Using appropriate size screws, secure the duct connector
and the mounting plate to the wood floor.
4. Connect the round supply duct to the underside of the
duct connector and secure them with field supplied
sheet metal screws or appropriate clamps.
5. Seal all connections with industrial grade sealing tape
or liquid sealant as required.
Requirements for sealing ductwork vary from region
to region. Consult with local codes for requirements
specific to your area.
Installing the Furnace
Sides and back of the furnace may be enclosed by wall
framing such as in a closet or alcove. The dimensions
of the room or alcove must be able to accommodate the
overall size of the furnace and the installation clearances
outlined on page 5 and Figure 1, Figure 2, Figure 3, &
Figure 4 (page 9). The furnace shall be appropriately
connected to the supply and return air distribution system
as shown in Figure 24 (page 29), Figure 25 (page 30),
Figure 26 (page 31), and Figure 27 (page 32).
1. Remove furnace outer door(s) and bottom fuel line
knockout.
2. Place furnace onto duct connector and center with floor
opening.
3. Slide onto mounting plate. (Bottom rear slots on furnace
should engage with mounting plate tabs.)
4. Secure front with one (1) fastener at each corner (Figures
15 or 16).
Figure 13. Narrow Air Ducts - Option 1
Narrow
Duct
Finger Tabbed
Duct Connector
Secure finger tabs to
side of air duct with staples
or sheet metal screws
Bend tabs tightly
against supply air duct
Supply Air Duct
Cut out & remove
Figure 14. Narrow Ducts - Option 2
Tabs slide into slots
in back of furnace
Mounting
Plate
Screw Down
Duct Connector
Supply
Air Duct
Hole for
Gas Line
Wood Floor
Tabs slide into slots
in back of furnace
Mounting
Plate
14” Round
Duct Connector
Optional Hole
for Gas Line
Optional Hole
for Gas Line
Figure 15. Round Duct Connector
NOTE: The duct connector tabs may be attached to
the air duct with sheet metal screws or other suitable
fasteners as long as the duct connector and the air duct
are securely attached.
7. Seal all connections with industrial grade sealing tape
or liquid sealant.
NOTE: Requirements for sealing ductwork vary
from region to region. Consult with local codes for
requirements specific to your area.
Narrow Duct Attachment - Option 2
These alternate attachment methods may be used to
install a furnace duct connector to narrow metal ductwork
if insufficient clearances prevent the bending of the duct
connector tabs at the side of the duct.
1. Cut and remove the top of the supply air duct as shown
in Figure 13.