COZY W255G - Rough-In Instructions

page 7 84502-C
ROUGH-IN INSTRUCTIONS
NOTE: Maximum wall thickness for a dual wall (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 F (below).
Fig. F
Fig. E: Gas Supply
WARNING: Do not bypass the blocked flue switch. To do so could expose
the consumer to property damage, personal injury or possible death.
Fig. C
Fig. D-1 Fig. D-2
Reset
Button
Draft
Diverter
Relief
Opening
Combustion
Chamber
Man. Reset
Blocked
Flue Switch
Switch/
Gas
Control
Wire
Installation of B-W Gas Vent for
one story buildings or for
rst oor of multi-story
buildings.
Header plate of vented wall furnace.
(also acts as restop)
Use 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.
To Heater Gas
Control Valve
Drip Leg
1/8” NPT
Pressure Tap
Gas
Supply
Line
Manual Cut-Off-Valve
STEP 2.
Cut out an opening between the studs of 14-3/8” x
66-1/2” above the oor plate. Embed the rear ange of
the channel on top of header into either the drywall or
the plastered wall. This provides part of the required re
stop. Square up and nail the header in place with the top
front of header located 65-3/4” above oor plate.
(See arrow on right side of header and
Figures G-1, G-2 and G-3 on Page 8).
STEP 3.
Rough in ½” gas supply on center line of left stud either
4” above top of oor plate or 4” to right of left stud
through oor plate.
(See Figure G-1 on Page 8).
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