Common Direct Venting; Venting Installation Sequence; Power Vent Installation - State Water Heaters 301 Series Instruction Manual

PIPE SIZE REQUIREMENTS
The water heaters covered in this manual are certified for the
use of two-, three-, and four-inch pipe for the vent (exhaust) and
intake air piping. If the installed equivalent length for the intake air
or vent piping will be 50 feet (15.2 m) or less, two- or three-inch
pipe must be used. If the installed equivalent length will be more
than 50 feet (15.2 m), four-inch pipe must be used.
Note: Install the pipe size required for the installed
equivalent length of each pipe independently. That is,
if the intake air pipe will be 50 equivalent feet or less
and the vent pipe will be more than 50 equivalent feet,
the intake air pipe must be installed using three-inch
pipe and the vent must be installed using four-inch
pipe.
MAXIMUM EQUIVALENT LENGTHS
Two-Inch Pipe
The SUF 60120, 100150 and 100199 are certified for a maximum
equivalent vent length of 40 feet (12.1 m). The SUF100250 is
certified for a maximum equivalent vent length of 20 feet (6.1 m).
The maximum equivalent length for the air inlet pipe is the same
as the vent pipe.
Three-Inch Pipe
The water heaters covered in this manual are certified to a
maximum length of three-inch pipe for the exhaust venting
arrangement of 50 equivalent feet (15.2 m). The certified maximum
length of three-inch pipe for intake air piping is also 50 equivalent
feet (15.2 m). On Direct Vent installations, both pipes can be up
to 50 equivalent feet (15.2 m).
Four-Inch Pipe
The water heaters covered in this manual are certified to a
maximum length of four-inch pipe for the exhaust venting
arrangement of 120 equivalent feet (36.5 m). The certified
maximum length of four-inch pipe for intake air piping is also 120
equivalent feet (36.5 m). On Direct Vent installations, both pipes
can be up to 120 equivalent feet (36.5 m).
MINIMUM EQUIVALENT LENGTHS
Two-Inch Pipe
The water heaters covered in this manual are certified to a
minimum equivalent length of 2 inch pipe of 12 feet ( 3.7 m). There
is no minimum equivalent feet requirement for the intake air pipe.
Three-Inch Pipe
The water heaters covered in this manual are certified to a
minimum length of three-inch pipe for the vent (exhaust) of seven
equivalent feet (2.1 m). There is no minimum equivalent feet
requirement for the intake air pipe.
Four-Inch Pipe
There is no minimum equivalent feet requirement for the intake
air pipe.
Optionally, the heater may use four-inch diameter vent for
equivalent lengths of 50 to 120 feet. For short equivalent lengths
(depending on heater size), a two-inch pipe option is also available.
These optional vent diameters must conform to
and use field supplied terminals and wall plates.
MAXIMUM NUMBER OF ELBOWS
The maximum number of elbows allowed varies according to the
heater input rating and pipe diameter. See
FACTORY-SUPPLIED FITTINGS
The water heater ships with two factory-supplied three-inch
terminations (PVC 45° elbows with debris screen). Factory-
supplied vent and intake air terminations, concentric, or low-
profile terminations must be used. Factory-supplied terminations
and installed fittings (exhaust/condensate elbow and intake air
connection) add zero equivalent feet to the vent and intake air
piping.
SUF
60120
100150
100199
100250
Note: Refer to
FOUR-INCH VENT TERMINATIONS
When four-inch intake air or vent pipe is installed, factory supplied
four-inch terminations must be used. Contact your local distributor
or call the parts department (phone number listed on the back
cover of this manual) to order four-inch termination(s).
OPTIONAL CONCENTRIC & LOW PROFILE TERMINATIONS
The water heaters covered by this manual may be installed in
a Direct Vent configuration using a concentric termination or a
low-profile termination.
Concentric and Low-Profile terminations must be ordered
separately. Contact your local distributor or call the parts
department phone number listed on the back cover of this manual
to order.
The following are the part numbers for the different pipe diameters:
• Two-Inch Concentric Termination #100153586
• Two-Inch Low-Profile Termination #100086241
• Four-Inch Concentric Termination # 100111100 (used for
both three- and four-inch diameter piping)
• Three-Inch Low-Profile Termination # 100187887
• Four-Inch Low-Profile Termination # 100187888

COMMON DIRECT VENTING

The water heaters covered by this manual may be installed using
a common direct vent kit. Contact your local distributor or call the
parts department phone number listed on the back cover of this
manual for more information or to order.

VENTING INSTALLATION SEQUENCE

1. Read
Requirements
and requirements must be followed on all installations.
2. Determine whether the water heater will be installed in a
Power Vent or Direct Vent configuration and which vent system
arrangement will be used for the installation. See the various
venting arrangements in .
3. Proceed to the applicable instructions:

POWER VENT INSTALLATION

1. Read the
Requirements
and requirements must be followed in addition to the instructions
below that are specific for Power Vent configurations.
(page 23)
Table 7
2. Determine which Power Vent arrangement will be used for the
installation; vertical or horizontal termination. See
Figure 43
3. Determine the vent pipe size for the installation. See Venting
(page 23).
Table 7
Requirements on page 22
4. Plan the layout of the vent piping backwards from the termination
point outdoors to the water heater. Layout the vent piping to use
a minimum of pipe and elbows.
5. Install the termination first.
23
Table 7. PVC/CPVC Equivalent Length and
Maximum Number of Elbows
Equivalent Vent Length
2" 3" 4"
12' to 40' 7' to 50' 50' to 120'
12' to 40' 7' to 50' 50' to 120'
12' to 40' 7' to 50' 50' to 120'
12' to 20'
7' to 50' 50' to 120'
and
Table 10 Table 11
for the equivalent linear pipe length of AL29-4C
and 90° elbows.
General Venting Instructions
(page 22) before proceeding. These instructions
• (page 23).
Power Vent Installation
• (page 24).
Direct Vent Installation
General Venting Instructions
(page 22) before proceeding. These instructions
(page 35).
Venting Requirements
• If the vent piping will terminate vertically, through a
roof, see
Vertical Termination Installation
• If the vent piping will terminate horizontally, through
a sidewall, see
Sidewall Termination Installation
Max Elbows
2" 3" 4"
4 4 6
4 4 6
4 4 6
2 4 6
beginning on page 29
45°
®
(page 21) and
Venting
(page 21) and
Venting
and
Figure 42
(page 22).
(page 25).
(page