International comfort products G9MVE A3 Series Installation Instructions Manual page 36

INSTALLATION INSTRUCTIONS
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 appliances must be sized to the
minimum size as determined using appropriate table found in
the current edition of National Fuel Gas Code NFPA 54/ANSI
Z−223.1. In Canada, refer to CAN/CSA−B149.1
An abandoned masonry chimney may be used as a raceway
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 and be terminated
individually, as shown in Figure 49 for Direct Vent (2−Pipe)
system, or Figure 50 for single−pipe or ventilated combustion
air option.
A furnace shall not be connected to a chimney flue serving 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 providing it is permitted by
local code, the current edition of the National Fuel Gas Code,
and the vent or liner manufacturer's installation instructions.
Care must be taken to prevent the exhaust gases from one
appliance from contaminating the combustion air of other gas
appliances.
Do not take combustion air from inside the chimney when using
ventilated combustion air or single−pipe vent option.
These furnaces can be vented as direct−vent (two−pipe),
ventilated combustion air, or non-direct (single−pipe) vent
system. Each type of venting system is described below.
Common venting between these furnaces or other appliances
is prohibited.
Materials
U.S.A.
Combustion air and vent pipe, fittings, primers, and solvents
must conform to American National Standards Institute (ANSI)
standards and American Society for Testing and Materials
(ASTM) standards. See Table 13 for approved materials for
use in the U.S.A. This furnace is also CSA approved for venting
with M&G DuraVent® PolyPro® polyproplylene venting
systems.
Canada
Special Venting Requirements for Installations in Canada
Installation in Canada must conform to the requirements of
CAN/CSA B149 code. Vent systems must be composed of
pipe, fittings, cements, and primers listed to ULC S636. M&G
DuraVent PolyPro polyproplylene venting systems are ULC
S636 listed.
NOTE: When using polypropylene venting systems, all venting
materials used, including the vent terminations, must be from
the same manufacturer.
Venting Systems
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow the instructions outlined in Locating the Vent
Termination for each appliance being placed into operation
could result in carbon monoxide poisoning or death.
For all venting configurations for this appliance and other gas
appliances placed into operation for the structure, provisions for
adequate combustion, ventilation, and dilution air must be
provided in accordance with:
U.S.A. Installations: Section 9.3 NFPA 54/ANSI Z223.1
1−2012, Air for Combustion and Ventilation and applicable
provisions of the local building codes.
Canadian Installations: Part 8 of CAN/CSA−B149.1−10.
Venting Systems and Air Supply for Appliances and all
authorities having jurisdiction.
36
RECOMMENDED
TERMINATIONS
It is recommended that sidewall vent terminations of
over 24 inches (0.6 M) in length or rooftop vent termin-
ations of over 36 inches (1 M) in length be supported
by EITHER the factory accessory vent termination kit
or field-supplied brackets or supports attached to the
structure. A factory accessory vent termination kit may
be used for direct vent terminations. Termination kits
are available for 2-in. or 3-in. pipe. See Table 12 for
available options.
Table 12
Direct Vent
(2−Pipe)
Termination Kit
2−in (51 mm)
Concentric Vent
Kit
3−in (76 mm)
Concentric Vent
Kit
2−in (51 mm)
Termination
Bracket Kit
3−in (76 mm)
Termination
Bracket
Direct Vent / 2−Pipe System
In a direct−vent (2−pipe) system, all air for combustion is taken
directly from outdoor atmosphere, and all flue products are
discharged to outdoor atmosphere. Combustion-air and vent
pipes must terminate together in the same atmospheric
pressure zone, either through the roof (preferred) or a sidewall.
See Figure 62 for references to clearances required by
National code authorities.
OPTIONAL CONFIGURATION FOR COMBUSTION
AIR INLET PIPE
In applications where there is a risk of excessive mois-
ture entering the combustion air inlet pipe, a moisture
trap may be added to the inlet pipe to help prevent
moisture from entering the furnace from the combus-
tion air inlet pipe. See Figure 52.
When sizing venting systems, the equivalent length of
the optional inlet pipe moisture trap must be taken into
account.
Ventilated Combustion Air Systems
In a ventilated combustion air option, the vent terminates and
discharges the flue products directly to the outdoors similar to a
direct vent system. See Figure 63 for references to clearances
required by National code authorities.
All air for combustion is piped directly to the furnace from a
space that is well ventilated with outdoor air (such as an attic or
crawl space) and the space is well isolated from the living
space or garage. Combustion air requirements for this option
are the same as the requirements for providing outside air for
Specifications subject to change without notice.
Gas Furnace: (F/G)9MVE
NOTICE
SUPPORT FOR
Vent Termination Kit for Direct Vent
(2−Pipe) Systems
Diam. Of Combustion
Termination System Air and Vent Pipes
in.(mm)
Single Penetration of 1, 1−1/2, 2, or 2−1/2 (25,
Wall or Roof 38, 51, 64 mm)
Single Penetration of 2−1/2, 3 or 4
Wall or Roof (64, 76, 102 mm)
2−Pipe Termination 1, 1−1/2, 2, or 2−1/2 (25,
System 38, 51, 64 mm)
2−Pipe Termination 2−1/2, 3 or 4
System (64, 76, 102 mm)
NOTICE
440 01 4401 02
VENT