ICP G9MAC Series, Installation Instructions Manual

440 01 4201 03

35

Specifications subject to change without notice.

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

−

2009, 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.

NOTICE

RECOMMENDED SUPPORT FOR VENT TERMINATIONS

It is recommended that sidewall vent terminations of over 24

inches (0.6 M) in length or rooftop vent terminations of over

36 inches (1 M) in length be supported by EITHER the fact-

ory 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.

A factory accessory concentric vent termination kit is available

for direct vent terminations. Concentric vent termination kits are

available for 2

−

in. and 3

−

in. pipe. See 

Table 12

 for available

options.

Table 12

Vent Termination Kit for Direct

Vent (2

−

pipe) Systems

Direct Vent (2

−

pipe)

Termination Kit

Termination

System

Diam. Of

Combustion Air

and Vent Pipes

in.(mm)

2

−

in (51 mm) Concentric

Vent Kit

Single Penetration

of Wall or Roof

1, 1

−

1/2, 2, or 2

−

1/2

(25, 38, 51, 64 mm)

3

−

in (76 mm) Concentric

Vent Kit

Single Penetration

of Wall or Roof

2

−

1/2, 3 or 4

(64, 76, 102 mm)

2

−

in (51 mm) Termination

Bracket Kit

2

−

Pipe

Termination

System

1, 1

−

1/2, 2, or 2

−

1/2

(25, 38, 51, 64 mm)

3

−

in (76 mm) Termination

Bracket

2

−

Pipe

Termination

System

2

−

1/2, 3 or 4

(64, 76, 102 mm)

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 57 

for references to clearances required by

National code authorities.

NOTICE

OPTIONAL CONFIGURATION FOR COMBUSTION AIR

INLET PIPE

In applications where there is a risk of excessive moisture

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 combustion air inlet pipe. See

Figure 49

.

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 58

 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

combustion for a single pipe vent system. Refer to the “Air For

Combustion and Ventilation Section.”

NOTICE

OPTIONAL VENTING BELOW THE FURNACE

The venting system may be positioned below the furnace

ONLY IF the factory accessory External Vent Trap Kit is used.

The External Vent Trap Kit  is only approved for PVC/ABS

DWV venting systems.

CAREFULLY FOLLOW THE INSTRUCTIONS PROVIDED

WITH THE EXTERNAL VENT TRAP KIT FOR LAYING OUT

THE VENTING SYSTEM AND THE DRAIN SYSTEM. 

The

instructions included with this furnace DO NOT APPLY to

vent systems that are located below the furnace

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.
The instructions included with this furnace DO NOT APPLY

to vent systems that are located below the furnace.

 CARE-

FULLY FOLLOW THE INSTRUCTIONS PROVIDED WITH

THE EXTERNAL VENT TRAP KIT FOR LAYING OUT THE

VENTING SYSTEM AND THE DRAIN SYSTEM when all or

part of the venting system is placed below the furnace.

Proper configuration of the venting and drain system is critic-

al when placing all or part of the venting system below the

level of the furnace. VENT GASSES COULD BE RELEASED

FROM THE DRAINAGE SYSTEM, if the instructions

provided with the External Vent Trap Kit are not followed.