Installation guide

Direct Venting (Two-pipe System)
44
General Installation Information (continued)
Installation steps (outline) (continued)
Table 32. Approved materials for two-pipe system
Part
Material Certified to Standards Applicability
Exhaust pipe and fitting Stainless steel UL1738
“Venting systems for
gas-burning appliances,
Categories II, III, IV”
U.S.A.
ULC S636
“Standard for Type BH gas
venting systems”
Canada
CPVC UL1738
“Venting systems for
gas-burning appliances,
Categories II, III, IV”
U.S.A.
ULC S636
“Standard for Type BH gas
venting systems”
Canada
Combustion air pipe
a
n
d
f
i
t
t
i
n
g
Stainless steel n.a. n.a.
and fitting
PVC-DWV
Schedule 40
ANSI/ASTM D2661
CSA B181.1
ULC S102.2
ANSI/ASTM D2665, D1785
CSA B137.3, B181.2
ANSI/ASTM F441
U.S.A./Canada
CPVC
Schedule 40
ANSI/ASTM D2661
CSA B181.1
ULC S102.2
ANSI/ASTM D2665, D1785
CSA B137.3, B181.2
ANSI/ASTM F441
U.S.A./Canada
ABS-DWV
Schedule 40
ANSI/ASTM D2661
CSA B181.1
ULC S102.2
ANSI/ASTM D2665, D1785
CSA B137.3, B181.2
ANSI/ASTM F441
U.S.A./Canada
Pipe cement,
primer (for combustion
a
i
r
i
n
t
a
k
e
p
i
p
e
)
PVC ANSI/ASTM D2564
CSA B137.3
U.S.A./Canada
air intake pipe)
CPVC ANSI/ASTM F493
C
S
3
6
/
CSA B137.6
ABS ANSI/ASTM D2235
CSA B181.1/B182.1
Pipe cement,
primer (for exhaust
pipe and fitting)
CPVC ULC S636
“Standard for Type BH gas
venting systems”
Class IIB 90°C
U.S.A./Canada
5368 815 v2.0 b
Do not use cellular (foam) core pipe
material to vent this Vitodens boiler.
CAUTION
On the job site, ensure that non-listed
combustion air pipe materials are not
inadvertently used instead of listed
vent pipe material.
CAUTION