Bryant 350AAV Installation, Start-Up, And Operating Instructions Manual page 38

COMBUSTION – AIR
INTAKE HOUSING
3/8 ID TUBE
3/16
DRILL
4"MIN
TRAP
TO OPEN
DRAIN
→ Fig. 40—Air Intake Housing Plug Fitting Drain
ATTACHMENT OF VENT PIPE
1. Determine vent pipe diameter and maximum pipe lengths
using Table 11.
NOTE: (Direct Vent/2-Pipe ONLY) vent pipe system has the
same diameter and same length as combustion air pipe as men-
tioned in section "Assembly of Combustion Air Pipe (Direct
Vent/2-Pipe system ONLY)."
NOTE: Do not count elbows or pipe sections in terminations or
within furnace (all elbows shown in Fig. 42 and Fig. 43 are not be
counted).
COMBUSTION AIR
PIPE (NON-DIRECT
VENT/1-PIPE)
VENT PIPE
HORIZONTAL TO ROOF
COMBUSTION AIR
PIPE (DIRECT VENT
/2-PIPE)
COMBUSTION AIR
PIPE (NON-DIRECT
VENT/1-PIPE)
VERTICAL TO ROOF
BURNER
BOX
COMBUSTION-AIR
PIPE (DIRECT
VENT/2 PIPE)
COMBUSTION-AIR
PIPE (NON-DIRECT
VENT/1-PIPE)
A05093
12 " MIN
12 " MIN
NOTE: A 12-In. minimum offset pipe section is recommended with
short (5-ft. to 8-ft) vent systems. This recommendation is to
reduce excessive condensate droplets from exiting the vent pipe.
→ Fig. 41—Short Vent (5 to 8 ft) System
2. Determine location of vent pipe connection to inducer
housing as shown in Fig. 39 for application.
3. Reposition elastomeric (rubber) inducer housing outlet cap
and clamp to appropriate unused inducer housing connec-
tion. Tighten clamp.
CAUTION: UNIT DAMAGE HAZARD
Failure to follow this caution may result in unit compo-
nent damage.
Inducer housing outlet cap must be installed and fully
seated against inducer housing. Clamp must be tightened
to prevent any condensate leakage.
4. Install pipe grommet (factory-supplied in loose parts bag)
into selected furnace casing vent pipe hole.
5. Be certain that mating surfaces of inducer housing connec-
tion elastomeric (rubber) coupling, and 2-in. diameter vent
pipe are clean and dry. Assemble the elastomeric (rubber)
vent coupling (with 2 loose clamps) onto inducer housing
connection. Insert the 2-in. diameter vent pipe through the
elastomeric (rubber) coupling and fully into inducer hous-
ing connection until it touches a stop inside the inducer
housing outlet. Tighten the screws on both clamps to
15-in-lb. of torque. pipe to inducer housing. Tighten the
clamp screws to 15 in.-lb. of torque.
NOTE: Starting at furnace, slope vent pipe a minimum of 1/4-in.
per linear ft with no sags between hangers.
COMBUSTION AIR
PIPE (DIRECT VENT
/2-PIPE)
COMBUSTION AIR
PIPE (NON-DIRECT
VENT/1-PIPE)
VENT PIPE
HORIZONTAL TO SIDEWALL
VENT PIPE
COMBUSTION AIR
PIPE (NON-DIRECT
VENT/1-PIPE)
VERTICAL TO SIDEWALL
—38—
12 " MIN
COMBUSTION AIR
PIPE (DIRECT
VENT/2-PIPE)
COMBUSTION AIR
PIPE (DIRECT VENT
/2-PIPE)
12 " MIN
VENT PIPE
A05094