Bryant 350MAV Installation, Start-Up, And Operating Instructions Manual page 23

TABLE 5—COMBUSTION-AIR AND VENT PIPE
TERMINATION CLEARANCES
LOCATION
Above grade level or above
anticipated snow depth
Dryer/Water heat vent
From plumbing vent stack
From any mechanical fresh air intake
For furnaces with an input capacity of
100,000 Btuh or less—from any non-
mechanical air supply (windows or doors
which can be opened) or combustion-air
opening
For furnaces with an input capacity greater
than 100,000 Btuh or less—from any non-
mechanical air supply (windows or doors
which can be opened) or combustion-air
opening
From service regulator vent, electric and
gas meters and relief equipment
Above grade when adjacent to public
walkway
* Horizontal distance.
† 18 in. above roof surface in Canada.
‡ 36 in. to electric meter in Canada only.
NOTES:
1. If installing 2 adjacent 350MAV Furnaces, refer to Multiventing and Vent
Terminations section for proper vent configurations.
2. When locating combustion-air and vent terminations, consideration must be
given to prevailing winds, location, and other conditions which may cause
recirculation of the appliance's own flue products or the flue products of
adjacent vents. Recirculation can cause poor combustion, inlet condensate
problems, and accelerated corrosion of heat exchangers.
3. Vent termination can not terminate less than 2 ft horizontal and 7 ft above
public walkway or where condensate vapor or droplets may be a hazard.
4. Vent termination must be at least 3 feet above any forced draft inlets within
10 feet horizontal. Vent termination must be at least 3 feet horizontal from
other direct vent appliances intake unless otherwise specified by manufac-
turer.
→
TABLE 6—APPROVED COMBUSTION-AIR AND VENT PIPE, FITTING AND CEMENT MATERIALS
SPECIFICATION
(MARKED ON MATERIAL)
D1527
D1785
D2235
D2241
D2466
D2468
D2564
D2661
D2665
F438
F441
F442
F493
F628
F656
F891
CLEARANCE (FT)
U.S.A. Canada
1
3
3
Note 4
1
1
4*
Note 3 Note 3
MATERIAL PIPE FITTINGS SOLVENT CEMENT AND PRIMERS
ABS Pipe —
PVC Pipe —
For ABS — —
PVC Pipe —
PVC — Fittings
ABS — Fittings
For PVC — —
ABS Pipe Fittings
PVC Pipe Fittings
CPVC — Fittings
CPVC Pipe —
CPVC Pipe —
For CPVC — —
ABS Pipe —
For PVC — —
PVC Pipe —
NOTE: Select 1 vent pipe connection and
1 combustion-air pipe connection.
COMBUSTION-
AIR
VENT
1†
3
3
6
1
3
COMBUSTION-
AIR
6‡
AIR
FLOW
HORIZONTAL-LEFT DISCHARGE
Fig. 33—Combustion-Air and Vent Pipe Connections
—
—
Solvent
Cement
—
—
—
Solvent
Cement
—
—
—
—
—
Solvent
Cement
—
Primer
—
—23—
NOTE: Select 1 vent pipe connection and
1 combustion-air pipe connection.
AIR
FLOW
COMBUSTION-
AIR
VENT
VENT
COMBUSTION-
AIR
UPFLOW
VENT
HORIZONTAL-RIGHT DISCHARGE
DESCRIPTION
Schedule-40
Schedule-40
For ABS
SDR-21 & SDR-26
Schedule-40
Schedule-40
For PVC
DWV at Schedule-40 IPS sizes
DWV
Schedule-40
Schedule-40
SDR
For CPVC
Cellular Core DWV at Schedule-40 IPS sizes
For PVC
Cellular Core Schedule-40 & DWV
VENT
COMBUSTION-
AIR
AIR
FLOW
DOWNFLOW
COMBUSTION-
AIR
VENT
AIR
FLOW
A96187