A.O. Smith 3400 - Manual (Page 37)

37
ALL VENT PIPE MATERIALS AND FITTINGS MUST COMPLY WITH THE FOLLOWING:
ITEM MATERIAL STANDARDS FOR INSTALLATION IN:
UNITED STATES CANADA
Vent pipe and fittings PVC schedule 40 ANSI/ASTM D1785 PVC, CPVC and Polypropylene venting must be
ULC-S636 Certified.
CPVC schedule 40/80 ANSI/ASTM F441
Polypropylene UL 1738
Pipe cement/primer PVC ANSI/ASTM D2564 ULC-S636 Certified.
CPVC ANSI/ASTM F493
NOTICE: DO NOT USE CELLULAR (FOAM) CORE PIPE
TABLE 12. PVC, VENT PIPE, AND FITTINGS
TABLE 13. DIRECT VENT ALLOWABLE AIR/VENT LENGTHS
MODELS
(XB)
AIR INTAKE
DIAMETER
(INCH)
AIR INTAKE
MIN. LENGTH
FEET (M)
AIR INTAKE
MAX. LENGTH
FEET (M)
VENT
DIAMETER
(INCH)
VENT MIN.
LENGTH
FEET (M)
VENT MAX.
LENGTH
FEET (M)
1000 6 12 (3.7) 100 (30.5) 6 10 (3) 100 (30.5)
1300 6 12 (3.7) 100 (30.5) 8 10 (3) 100 (30.5)
1700 8 12 (3.7) 100 (30.5) 8 10 (3) 100 (30.5)
2000 8 12 (3.7) 100 (30.5) 8 10 (3) 100 (30.5)
2600 8 12 (3.7) 100 (30.5) 8 10 (3) 100 (30.5)
3400 10 12 (3.7) 100 (30.5) 10 10 (3) 100 (30.5)
TABLE 14. ROOM AIR ALLOWABLE VENT LENGTHS
MODELS
(XB)
VENT DIAMETER
(INCH)
VENT MIN. LENGTH
FEET (M)
VENT MAX. LENGTH
FEET (M)
1000 6 10 (3) 100 (30.5)
1300 8 10 (3) 100 (30.5)
1700 8 10 (3) 100 (30.5)
2000 8 10 (3) 100 (30.5)
2600 8 10 (3) 100 (30.5)
3400 10 10 (3) 100 (30.5)
NOTE: When determining equivalent combustion air and vent length, add 10 feet (3 m) for each 90° elbow and 5 feet (1.5 m) for each
45° elbow. The Vent Max. Length does not include appliance elbows and adapters shipped with the unit.
VENT
MATERIAL
START-BASE VENT FIELD VENT LENGTHS &
FITTINGS
TERMINATIONS &
RAIN CAPS
INTAKE EXHAUST INTAKE EXHAUST INTAKE EXHAUST
Polypropylene
Venting
Air Intake
Box (Adapter
required to install
Polypropylene
pipes, can
use Adapter
discarded from
exhaust).
Use
Polypropylene
Kit shipped with
the unit, Discard
PVC/CPVC
Adapter or use
it with Air Intake
for Direct Vent
applications.
Use
Polypropylene
pipes and
fittings.
Use
Polypropylene
pipes and
fittings.
Polypropylene
90° elbows.
Polypropylene
Tee.
PVC/CPVC
Venting
Air Intake Box
will readily fit
the PVC/CPVC
pipes.
Use both
Polypropylene
Kit + PVC/CPVC
Adapter (shipped
with the unit).
Use PVC/
CPVC pipes and
fittings.
Use PVC/
CPVC pipes
and fittings.
PVC 90° elbows
with wire mesh.
PVC Tee with
wire mesh/ Rain
Caps.
Stainless Steel
Venting
Adapter required
to fit to the Air
Intake Box.
Pre-order unit
with Stainless
Steel Factory Kit.
Use Stainless
Steel pipes and
fittings.
Use Stainless
Steel pipes
and fittings.
Adapter required
+ PVC 90°
elbows with wire
mesh.
Adapter required
+ PVC Tee with
wire mesh/ Rain
Caps.
TABLE 15. COMPLETE VENTING SYSTEM