107272-UIM-B-1105

2” Pipe

Rubber Coupling with Hose Clamp

12” Min.

9” Min.

6” Min. or 6” Above the Snow Line

6” Min.

Connect Roof Jack to Furnace

1.Install Flue Shield inside Vent Connector. Push Flue Shield down until in contact with the built-in stop inside the Vent Connector. See Figures 28 and 29.

Failure to install the Flue Shield may cause premature flue pipe deterioration. Damaged flue pipe can result in asphyxiation, fire or equipment malfunction.

Flue Shield

Furnace

Vent

Connector

FIGURE 26: Combustion Air Inlet Pipe

Alternate

12” Min.

9” Min.

6” Min. or 6” Above the Snow Line

2” Pipe

Rubber Coupling

with Hose Clamp

6” Min.

FIGURE 27: Combustion Air Inlet Pipe Alternate

NOTE: Roof flashing, PVC pipe, PVC 90° elbows and fire stop are not supplied with the furnace.

LOCATING AND CUTTING ROOF JACK OPENING

FIGURE 28: Flue Shield Installation

2.Verify gasket is around outside of Air-Intake Connector. Install new gasket if missing or damaged.

3.Pull the Roof Jack's telescoping section down onto furnace. Fully engage Roof Jack onto Vent Connector and Air-Intake Connector and compress gasket. See Figure 29. Refer to Interior Roof Jack Extension installation instructions, if applicable.

4.Align holes in Roof Jack and Air-Intake Connector. Secure Roof Jack to furnace using #10 x 1/2 - 1-1/2" (#10 x 1.3 - 3.8 cm) Type AB or Type B sheet metal screw.

Bottom of

Roof Jack Roof Jack

Air Intake

Connector

Opening for

Combustion Air

Inlet Grommet

Vent

Connector

Gasket

Front of

Furnace

To facilitate the proper installation of the roof jack, it is very important that the roof jack opening in the ceiling and roof be on the same vertical center line as the furnace flue collar. See Figures 30 and 31.

Mark this location on ceiling and scribe a circle with a 5" (1.5 m) radius {10" (25.4 cm) diameter} around this mark. Cut opening for roof jack through ceiling and roof. (If furnace was installed during construction, cover furnace and flue opening to prevent debris from entering flue when hole is cut for roof jack).

INSTALLING ROOF JACK IN ROOF

1.Provide protection for Vent Connector and Air-Intake Connector from damage and debris.

2.Mark Roof Jack center line on ceiling. Cut a 5" (1.5 m) radius {10" (25.4 cm) diameter} hole through ceiling.

3.Mark Roof Jack center line on roof. Cut oblong hole through roof.

4.Insert Roof Jack through roof opening. Do not secure Roof Jack to roof.

FIGURE 29: Roof Jack Attachment to Furnace

INTERIOR EXTENSIONS

There is an optional 11” (43.2 cm) long interior extension that can be used to provide added interior roof jack length, if needed. To choose the proper length roof jack with or with-out the optional extension see Fig- ures 30 and 31 and Table 9. More than one interior extension may be used to accommodate “A” dimensions up to 110” (284.5 cm).

The joint where the optional interior extension connects to the roof jack must be below the ceiling. Failure to observe this requirement may result in asphyxiation, fire, or explosion

NOTE: Use of an interior extension will increase the roof jack adjust- able heights by the amount of the interior extension height.

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Unitary Products Group

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York DFAH, DFAA Connect Roof Jack to Furnace, Locating and Cutting Roof Jack Opening, Installing Roof Jack in Roof