American Water Heater 317994-002 - Manual (Page 13)

13
FIGURE 8B.
Vent Pipe System
This water heater uses a non-direct, single-pipe vent
system to remove exhaust gases created by the burning of
fossil fuels. Air for combustion is taken from the immediate
water heater location or is ducted in from the outside (see
“Combustion Air Supply and Ventilation”).
This water heater must be properly vented for the removal
of exhaust gases to the outside atmosphere. Correct
installation of the vent pipe system is mandatory for the
proper and efficient operation of this water heater and is
an important factor in the life of the unit.
The vent pipe must be installed according to all local and
state codes or, in the absence of local and state codes, the
“National Fuel Gas Code”, ANSI Z223.1(NFPA 54)-current
edition. The vent pipe installation must not be obstructed
so as to prevent the removal of exhaust gases to the
outside atmosphere.
IMPORTANT: The use of vent dampers is not
recommended by the manufacturer of this water heater.
Although some vent dampers are certified by CSA
International, this certification applies to the vent damper
device only and does not mean they are certified for use
on this water heater.
U.L. recognized fuel gas and carbon monoxide (CO)
detectors are recommended in all applications and should
be installed using the manufacturer’s instructions and local
codes, rules, or regulations.
IMPORTANT: If you lack the necessary skills required
to properly install this venting system, you should not
proceed, but get help from a qualified technician.
Draft Hood Installation
Sheet Metal Screws (Four Provided)
Draft Hood
Legs
Legs
Slot Slot
Jacket Top
Install The Draft Hood With The Four Screws Provided.
FIGURE 9
FIGURE 6.
FIGURE 7.
FIGURE 8A.
All Air From Outdoors: Inlet Air From Ventilated
Crawl Space/Outlet Air To Ventilated Attic
Confined
Space
Outlet Air
to the Attic
1 sq. in. per
4000 BTUH
Inlet Air
from the
Crawl Space
Alternative
Air Inlet
1 sq. in. per
4000 BTUH
Open
Foundation
Vent
s
Gable Vent
to Outdoor
Install Above
Insulation
Gable Vent
to Outdoors
Install Above
Insulation
Confined
Space
All Air from Outdoors Through Ventilated Attic
Outlet Air
to the Attic
1 sq. in. per
4000 BTUH
Inlet Air Duct
1 sq. in. per
4000 BTUH
12” Max.
All Air From Outdoors Using Horizontal Ducts
Confined
Space
Outlet
Outdoor
Air Ducts
Inlet
1 sq. in. per
2000 BTUH
1 sq. in. per
2000 BTUH
All Air From Outdoors - Using A Single Permanent Opening
Confined
Space
1 sq. in. per
3000 BTUH
Alternative
Opening
Location