1018454-D
Page 8
ROUGH-IN INSTRUCTIONS
WARNING:
Do not bypass the blocked flue switch. To do so could expose the consumer to property
damage, personal injury or possible death.
!
NOTE: MAXIMUM WALL THICKNESS FOR A DUAL WALL (W505GPPR, W505GPPD) INSTALLATION IS 5-3/8”.
FIG. 5: Gas Supply
To Heater Gas
Control Valve
Drip
Leg
1/8” NPT
Pressure Tap
Gas
Supply
Line
Manual Cut-Off-Valve
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 6.
FIG. 3
Chimney
More than 10’
10’
2’ Min.
3’ Min.
Height above any
roof surface within
10’ horizontally
Ridge
10’ or Less
2’ Min.
3’ Min.
Chimney
Ridge
FIG. 4-B
FIG. 4-A
Draft
Diverter
Relief
Opening
Combustion
Chamber
Man. Reset
Blocked
Flue Switch
Switch/
Gas
Control
Wire
Reset
Button
FIG. 6
Installation
of B-W Gas
Vent for one
story buildings
or for first floor
of multi-story
buildings.
Header plate of
vented wall furnace.
(Also acts as firestop)
Use the
manufacturer’s method of
fastening pipe to base plate.
Sheet metal screw
base plate to header.
Studs on 16”
centers.
Plate cut away for full
width of stud space
to provide ventilation.
Ceiling plate
spacers to center
B-W gas vent in
stud space - nail
securely at
both ends.
