Figure a

WARNING: Do not bypass the blocked flue switch. To do so could expose the consumer to property damage, personal injury or possible death.

	More than 10’	Height above any
	More than 10’	roof surface
FIGURE A	1 0 ’	roof surface
FIGURE A	1 0 ’	within 10’
		horizontally
Ridge	2’ Min.
		3’ Min.
10’ or Less	Chimney
	Chimney
2’ Min.

ROUGH-IN INSTRUCTIONS NOTE: Maximum wall thickness for a dual wall (W501, W502, W505, W506) installation is 5-3/8”.

STEP 1. Attach the base plate (purchased with the vent pipe) to the header plate using two No. 8 sheet-metal screws through the pre-punched holes. The heater may not vent properly without a base plate to anchor and seal the vent system. See Figure C.

Ridge

3’ Min.

Chimney

	Man. Reset
	Blocked
	Flue Switch
	Draft	Reset
	Draft	Button
		Button

Installation of B-W Gas Vent for one story buildings or for first floor of multi- story buildings

Ceiling plate spacers to center B-W gas vent in stud space - nail securely at both ends

Plate cut away for full width of stud space to provide ventilation

Studs on 16 inch centers

Sheet metal screw base plate to header

Use manufacturer’s method of fastening pipe to base plate

	Diverter
Switch/	Relief
Gas	Opening
Control	Combustion
Wire	Combustion
	Chamber

FIGURE B	FIGURE B-1

Header plate of vented wall furnace (also acts as firestop)

FIGURE C

STEP 2. Cut out an opening between the studs of 14-3/8” x 66-1/2” above the floor plate. Embed the rear flange of the channel on top of header into either the drywall or the plastered wall. This provides part of the required fire stop. Square up and nail the header in place with the top front of header located 65-3/4” above floor plate. (See arrow on right side of header and Figure 1, 5A and 5B on Page 7).

STEP 3. Rough in ½” gas supply on center line of left stud either 4” above top of floor plate or 4” to right of left stud through floor plate. See Figure 1 located on Page 7.

Page 6

Reset

Button

FIGURE B

FIGURE B-1

FIGURE C