8
VENTING AND COMBUS-
TION AIR PIPING
WARNING
CARBON-MONOXIDE POISONING HAZARD
Failure to follow instruction could result in severe
personal injury or death due to carbon-monoxide
poisoning, if combustion products infiltrate into
the building.
Check that all openings in the outside wall around
the vent (and air intake) pipe(s) are sealed to pre-
vent infiltration of combustion products into the
building.
Check that furnace vent (and air intake) terminals
are not obstructed in any way during all seasons.
8.1
GENERAL
If this furnace replaces a furnace that was connected to
a vent system or chimney, the vent or vent connectors
of other remaining appliances may need to be re-sized.
Vent systems or vent connectors of other appliance must
be sized to the minimum size allowable.
An abandoned masonry chimney may be used as a race-
way for properly insulated and supported combustion-air
(when applicable) and vent pipes. Each furnace must
have its own set of combustion air and vent pipes.
A furnace shall not be connected to a chimney flue serv-
ing a separate appliance designed to burn solid fuel.
Other gas appliances with their own venting system may
also use the abandoned chimney as a raceway provid-
ing it is permitted by local code, the current edition of
the National Fuel Gas Code, and the vent or liner manu-
facturer’s installation instructions. Care must be taken to
prevent the exhaust gases from one appliance from con-
taminating the combustion air of other gas appliances.
• The vent pipe and combustion air pipe must be the
same diameter.
• Slope horizontal vent piping upward a minimum of
1/4" per foot of run so that condensate drains to-
ward the furnace.
• Support horizontal vent piping at least every five
feet. No sags or dips are permitted
• The vent pipe and combustion air pipe must termi-
nate on the same building side.
8.2
MATERIAL
USA:
Combustion air and vent pipe, fittings, primers, and sol-
vents must conform to American National Standards In-
stitute (ANSI) standards and American Society for Test-
ing and Materials (ASTM) standards. See Table 8 Ap-
proved combustion air and vent pipe, fitting and cement
materials (U.S.A. Installation) - for approved materials for
use in the U.S.A.
CANADA:
Installations in Canada must conform to the requirements
of CAN/CSA B149 code. PVC and CPVC vent systems
must be composed of pipe, fittings, cements, and primers
listed to ULC S636.
8.3
DIRECT VENT
When this furnace is installed as a direct vent (2 pipe)
furnace; no special provisions for air for combustion are
required.
However, other gas appliances installed in
the space with the furnace may require outside air for
combustion. Follow the guidelines to insure that other
gas appliances have sufficient air for combustion. Di-
rect vent installations require a dedicated combustion air
and venting system. All air for combustion is taken from
outside and all combustion products are discharged to
the outdoors. Therefore, no ventilation or combustion air
openings are required.
In Canada
, refer to manufacturer’s instructions for sup-
porting ULC S636 venting.
Combustion air and vent pipes must terminate either
through the roof or sidewall. See Figure 13.
8.4
NON DIRECT VENT
All air for combustion comes directly to the furnace from
a space that is well ventilated with outdoor air (such as
an attic, crawlspace or equipment closet) and the space
is well isolated from the living space or garage. In ad-
dition, other gas appliances installed in the space with
the furnace may require outside air for combustion. The
combustion air pipe cannot be terminated in attics or
crawlspaces that uses ventilation fans designed to op-
erate during the heating season. If ventilation fans are
present in these areas, the combustion pipe must termi-
nate outdoors as a direct vent (2 pipe) system.
Provisions for adequate combustion, ventilation, and di-
lution air must be provided in accordance with:
U.S.A. Installations:
Section 5.3 of the NFPA 54/ANSI
Z223.1-2009, Air for Combustion and Ventilation and ap-
plicable provisions of the local building codes.
Canada Installation:
Part 8 of the CAN/CSA-B149.1-
2010, Venting Systems and Air Supply for Appliances.
27
Summary of Contents for Chinook C105-M-V
Page 24: ...Figure 10 Typical gas pipe arrangement 23...
Page 27: ...Figure 11 Wiring Diagram 26...
Page 39: ...Figure 14 Wiring Diagram Modulating t stat 38...
Page 53: ...Table 17 CFM 52...
Page 54: ...Figure 15 Dimensional Drawing 53...
Page 55: ...14 PART LIST 54...
Page 56: ...Figure 16 Exploded view 1 55...
Page 57: ...Figure 17 Exploded view 2 56...
Page 59: ...Table 19 Parts list continued 58...
Page 60: ...Table 20 Parts list MS 59...
