1018454-D
Page 9
NOTE: For proper combustion, make sure
units are level, front to back and side to side.
STEP 5.
If the vent continues through additional stories within the
2x4-stud space, then fire-stop-spacers must be installed
at the second and subsequent ceiling levels.
See Figure
7-D (below).
ROUGH-IN INSTRUCTIONS
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 & Fig. 7-A, 7-B and 7-C.
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 Fig. 7-A)
STEP 4.
Remove double ceiling plate between studs. Install one
ceiling plate spacer across the cut out in ceiling plate. Install
vent pipe into position, be sure to lock bottom of vent pipe
into the base plate. Nail the second ceiling plate spacer in
place.
See Figure 6 (on page 8).
FIG. 7-C
NOTE:
Front panel
must be in front
of plaster ground
channel. Do not
hang it over front
of plaster ground.
PLASTER WALL
Plaster
B-W Type Vent
Screw
Front
Panel
Plaster
Ground
FIG. 7-B
NOTE:
Front panel
must be in front
of plaster ground
channel. Do not
hang it over front
of plaster ground.
Dry-Wall
B-W Type Vent
Screw
Front
Panel
Plaster
Ground
DRY WALL
FIG. 7-D
Firestop spacers
supplied by
manufacturer of
B-W gas vent.
Plate cut
away to provide
passage of B-W
gas vent.
Nail firestop
spacer securely.
Installation of
B-W gas vent for each
subsequent ceiling or
floor level of multi-story
buildings.
FIG. 7-A
Rough-In
Dimensions
4”
4”
14
1
/
4
”
min.
14
1
/
2
”
max.
*65
3
/
4
”
*This
measurement
must be taken
from top of
floor plate
