Applications; Direct Vent Installation Of Exhaust And Intake - Westinghouse WGR050NG076 Installation, Start-Up, Maintenance, Parts, Warranty

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• DO NOT vent near soffit vents, crawl space vents, or other areas
where condensate or vapor could create a nuisance or hazard or
cause property damage.
• DO NOT vent where condensate vapor could cause damage or
could be detrimental to the operation of regulators, relief valve,
or other equipment.
In the Commonwealth of Massachusetts and as Required by State
and Local Codes:
• The vented gas fueled appliance shall not be installed so its
combustion, ventilation, or dilution air is obtained from a
bedroom or bathroom.
• Signage: Whenever any through-the-wall (horizontal or sidewall)
vent is installed less than seven feet above the finished grade,
a metal or plastic identification plate shall be permanently
mounted to the exterior of the building at a minimum height
of eight feet above grade directly in line with the exhaust vent
terminal. The sign shall read, in print no less than 0.5 inches
in size, "GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL
OBSTRUCTIONS".
• Marking of Exhaust Vent and Intake Pipe: Piping used for
ventilation, make-up, or combustion air intake shall be labeled
as follows:
a. Throughout the entire developed length:
i. Labels must be placed every ten feet for exposed/visible
piping; or
ii. Labels must be placed every three feet for concealed piping.
b. At all changes of direction;
c. On each side of a penetration through a partition, wall or
ceiling; and
d. The labels shall be black lettering that:
i. Indicates that the piping is used for ventilation, make-up, or
combustion air intake, and
ii. The letters shall be sized equal to a minimum of the pipe
diameter. However, for piping with a diameter exceeding two
inches, said lettering does not need to be larger than two
inches.
The following table lists optional exhaust/intake terminations
available from Westinghouse:
Description
2" PVC Concentric Termination Kit
3" PVC Concentric Termination Kit
2" Stainless Steel Termination Kit
3" Stainless Steel Termination Kit
3" Polypro Vent Kit
Table 9 - Optional Vent Kits
H. Applications

1. Direct Vent Installation of Exhaust and Intake

If installing a direct vent option, combustion air must be drawn from
the outdoors directly into the water heater intake, and exhaust must
terminate outside. There are three basic direct vent options detailed in
this manual: 1. Side Wall Venting, 2. Roof Venting, and 3. Unbalanced
Venting.
Be sure to locate the heater such that the exhaust vent and intake
pipe can be routed through the building and properly terminated.
Different vent terminals can be used to simplify and eliminate multiple
penetrations in the building structure (see Optional Equipment in
Venting Section). The exhaust vent and intake pipe lengths, routing
and termination methods must all comply with the methods and limits
given in the Venting section of this manual.
When installing a combustion air intake from outdoors, care must be
taken to utilize uncontaminated combustion air. NOTE: To prevent
combustion air contamination, see Table 2.
WHL-001 Rev. 001 Rel. 008 Date 8.23.18
Take extra precaution to adequately support the weight of vent
pipes terminating through the roof. Failure to properly support
roof terminated piping could result in property damage, serious
injury, or death.
Stock Code
KGAVT0501CVT
KGAVT0601CVT
V500
V1000
8400P-001