Selecting Vent Pipe Materials - Navien NCB-190/060H Installation & Operation Manual

5.4 Selecting Vent Pipe Materials

Venting requirements differ in the US and Canada.
Consult the following chart or the most recent
edition of ANSI Z223.1/NFPA 54 or CAN/CGA B149.1,
as well as all applicable local codes and regulations
when selecting vent pipe materials. Do not use
cellular core PVC (ASTM F891), cellular core CPVC, or
Radel® (polyphenolsulfone) for the exhaust vent.
WARNING
Do not mix components from different systems.
The vent system may fail and harmful flue
products may leak into the living space. Mixing
of venting materials will void the warranty and
certification of the appliance.
Locale Recommended Vent Materials
PVC/CPVC Schedule 40 or 80 (Solid
●
Core)
UL1738 approved PVC or CPVC
USA
●
Approved Polypropylene (PP)
●
Approved Stainless Steel (SS)
●
Type BH Special Gas Vent Class IIA
●
(PVC)
Type BH Special Gas Vent Class IIB
●
Canada*
(CPVC)
Type BH Special Gas Vent Class IIC
●
(Polypropylene/Stainless Steel)
* For installation in Canada, field-supplied plastic vent
piping must comply with CAN/CGA B149.1 (latest edition)
and be certified to the Standard For Type BH Gas Venting
Systems, ULC-S636. Components of this listed system
must not be interchanged with other vent systems or
unlisted pipes or fittings. All plastic components and
specified primers and glues of the certified vent system
must be from a single system manufacturer and must not
be intermixed with another system manufacturer's parts.
The supplied vent connector and vent termination are
certified as part of the boiler.
This product is set to use PVC as the default vent
pipe material. If you require that return water hotter
than 140°F (60°C) to circulate back to boiler, the DIP
switch must be configured (Dip Switch 2, switch #8
to ON position). Otherwise, the boiler will control
and maintain the flue and DHW temperature below
150°F (65°C) and 140°F (60°C) respectively.
66 Venting for Combustion Air
When you set PCB DIP switch 2 #8 to
Note
On, ensure that CPVC, polypropylene
or stainless steel piping is used for
exhaust venting.
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CAUTION
This boiler has a built-in control to limit the
●
exhaust temperature to 149°F (65°C). As a
result, the boiler can be vented with Schedule
40 PVC.
In high temperature applications, the exhaust
●
temperature can exceed 149°F (65°C). In that
case, you must use Schedule 40/80 CPVC or
Approved Polypropylene/Stainless Steel in
the USA or Type BH Special Gas Vent Class IIB
(CPVC) or Class IIC (Polypropylene/SS) that
conforms to ULC-S636 in Canada.
When using 2 in. vent, if the exhaust
●
temperature exceeds 149°F (65°C), CPVC pipe
(field supplied) must be used for the first 3
feet of equivalent pipe length. For systems
using 3 in. vent, the first 5 in. of length must
be CPVC pipe.
The following polypropylene vent components are
approved for use with this appliance:
Duravent PolyPro® SW (Rigid)
2PPS-xxx (2") or 3PPS-xxx (3")
Centrotherm Innoflue® SW (Rigid)
ISxx02xx (2") or ISxx03xx (3")
Duravent PolyPro® (Flexible)
3PPS -FLEXxx (3")
2PPS-FAM or 3PPS-FAM (2" or 3" Rigid-to-Flex Male
Adapter)
2PPS-X3L (2" to 3" Increaser)
Centrotherm Innoflue® (Flexible)
IFVL02xxx (2") or IFVL03x xx (3")
IFSFC02 or IFSFC03 (2" or 3" Rigid-to- Flex Male
Adapter)
ISEI0203 or ISIA0203 (2" t o 3" Increaser)
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