bending of the duct connector tabs at the side(s) of the duct. (See Figure 18).
1.Score and cut the top of the metal duct as indicated in Step 1 or Step 2. With Step 1 choice, also cut out the metal from the shaded area “A”.
2.Fold the duct flap “B” up, (See Step 3).
3.At the
4.At Area “B”, bend the duct tabs up and back over, around the duct connector, (See Step 3).
5.Fold/form the duct flap against the side of the duct connector and attach as shown, (See Step 4). Use three (3) staples (minimum) on each duct flap OR, if a 2X block/joist is not provided, use two (2) sheet metal screws (minimum) on each duct flap. An alternate attachment method is acceptable, as long as the duct connector is securely attached.
6.Tape the duct flap edges with an approved tape for a
INSTALL FURNACE
a. Remove furnace outer door(s) and bottom fuel line knockout.
b. Place furnace onto duct connector and cen- ter with floor opening.
c.Slide onto mounting plate. (Bottom rear slots on furnace should engage with mounting plate tabs.)
d.Secure front with one (1) fastener at each corner (See Figure 19 or 20).
NOTE: Additional fasteners may be used at rear, sides or through door frame, as desired, to secure furnace to closet or alcove framing.
INSTALL ROOF JACK
Apply caulking compound on underside of roof flashing to form a continuous strip at least 3/8" wide (see Figure 21) around the underside of the perimeter of the flashing. Connect Roof Jack Assembly to the furnace. Insert telescop- ing Roof Jack Assembly through the opening cut on the roof. Connect flue pipe to flue collar of furnace. Connect combustion air pipe to furnace collar with sheet metal screw (See Figure 22). It is recommended that the connec- tion of the combustion air pipe to the furnace be made before the flashing is secured to the roof to maintain alignment of roof jack and furnace connections.
NOTE: For replacement furnaces, be sure the inner flue pipe connects over the furnace vent collar. DO NOT use a smaller diameter inner flue pipe which could slide inside the fur- nace vent collar and restrict the flow of furnace flue products.
Attach Roof Flashing: If necessary, shift roof flashing slightly in the roof opening so that assembly is in good alignment with furnace. Press down firmly over caulking on roof flashing to make the seal with roof water tight. Secure flashing with appropriate fasteners. As an
STEP 1. |
| STEP 2. |
| Fold Back Flap "B" | Fold Back Flap"B" |
|
|
Cut- Out | "B" | |
Area "A" | ||
"A" | ||
"A" | ||
| "B" |
Cut- Out Area"A"
Cut Lines
"B"
"B"
Duct
Top of Duct
Fold Back Flap "B"
Bend Duct Connector Tabs Up and Over- (along length of duct)
Fold Back Flap"B"
Staple Folded Duct
Flap (typ) to side of Duct
Connector
| Duct | Duct |
| Flap "B" | |
|
| |
|
| |
STEP 3. |
| STEP 4. |
Duct
Figure 18.
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