5396713-BIM-C-0319
Johnson Controls Ducted Systems
5
INSTALLATION OF SCREW ATTACHMENT DUCT
CONNECTOR (7990 SERIES)
1.
Make floor cut out as shown in Figure 6.
2.
Determine the depth of the floor cavity from the surface of the floor
to the top of the supply air duct and select the appropriate duct
connector from the chart.
3.
Place locating bracket (supplied with the duct connector) to the
back edge of the floor opening. See Figure 7.
4.
Apply a water based duct sealant to the 1/2” supply duct attach-
ment flange of the duct connector.
5.
Determine which of the four positions the duct connector best cen-
ters over the supply duct and insert it through the floor cutout.
6.
When properly aligned with the supply duct, secure the duct con-
nector to the floor with nails, flat head screws or staples.
7.
Use screws as required to secure duct connector to supply duct.
8.
Cut out the opening to the supply duct. If sealant was not used, the
installer should tape the mating flanges to provide a good air seal.
INSTALLATION OF TAB ATTACHMENT DUCT
CONNECTOR (7990 SERIES)
1.
Make floor cut out as shown in Figure 6.
2.
Determine the depth of the floor cavity from the surface of the floor
to the top of the supply air duct and select the appropriate duct
connector from the chart.
3.
Place locating bracket (supplied with the duct connector) to the
rear of the floor area for the furnace. See Figure 8.
4.
Determine which of the four positions the duct connector best cen-
ters over the supply duct and insert it through the floor cutout.
5.
Mark cut-out location on the supply duct and remove the duct con-
nector.
6.
Cut out the opening to the supply duct.
7.
Bend tabs down through and back up under the supply duct.
8.
Secure the duct connector to the floor with nails, flat head screws
or staples.
The duct connector is designed for use on ducts down to 12" in width.
When using the connector on smaller width ducts, there is not sufficient
clearance to bend the tabs on two sides of the duct connector.
In such cases the tabs may be attached to the sides of the duct by
using sheet metal screws or other suitable fasteners. Holes for sheet
metal screws are provided in three (3) tabs on each side of the duct
connector. If more than 3 tabs need to be used to provide a more
secure and air tight connection, the remaining tabs can also be fas-
tened to the duct with screws after drilling the required screw holes.
INSTALLATION OF THE FURNACE
1.
Remove the front panels and set the furnace onto the duct con-
nector. Slide it back until the rear of the unit engages the locator
bracket.
2.
Secure the front of the furnace with two screws at the provided
mounting holes. See Figure 9.
3.
Secure the top of the furnace to a structural member using screw
through the strap at the top of the furnace. Strap may be moved to
any of the holes located along the top back of the furnace. Installer
may provide an equivalent method, such as screws through the
casing side.
FIGURE 7:
Duct Connector Screw Attachment (7990 Series)
NOTICE
Duct sealant and tape must be classified as meeting HUD Standard
3280.715, U.L. Standard 181A.
FIGURE 8:
Duct Connector Tab Attachment (7990 Series)
LOCATOR BRACKET
NAILS, FLAT HEAD SCREWS,
OR STAPLES
SCREWS
FLOOR
SUPPLY DUCT
A0872-001
LOCATOR BRACKET
NAILS, FLAT HEAD SCREWS,
OR STAPLES
(Bend tabs under duct
opening to secure to the
supply duct.)
FLOOR
SUPPLY DUCT
A0873-001
FIGURE 9:
Installation of Furnace
Furnace Seated
Against the
Locator Bracket
Secure Furnace
to Floor with Two
Nails or Screws
(Not Provided).
A0874-001
.
