22
FACTORY SUPPLIED FITTINGS
The water heater ships with two (2) factory supplied 3 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.
TABLE 6
Number of
90° Elbows
Installed
3 Inch Pipe
4 Inch Pipe
Maximum Feet (Meters)
Maximum Feet (Meters)
One (1)
45 feet (13.7 meters)
115 feet (35.0 meters)
Two (2)
40 feet (12.2 meters)
110 feet (33.5 meters)
Three (3)
35 feet (10.7 meters)
105 feet (32.0 meters)
Four (4)
30 feet (9.1 meters)
100 feet (30.5 meters)
Five (5)
N/A
95 feet (29.0 meters)
Six (6)
N/A
90 feet (27.4 meters)
4 INCH EXTENDED VENT TERMINATIONS
When 4 inch intake air or vent pipe is installed, factory supplied 4
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 4 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 4 inch concentric termination or
a 3" or 4" 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.
Concentric & Low Profile Vent Termination Part Numbers:
• 4" Concentric Termination # 9006328005
• 3" Low Profile Termination # 9008933005
• 4" Low Profile Termination # 9008934005
VENTING INSTALLATION SEQUENCE
1. Read General Venting Instructions on page 20 and Venting
Requirements on page 21 before proceeding. These instructions
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 on page 34 and 35.
3. Proceed to the applicable instructions:
• Power Vent Installation on page 22.
• Direct Vent Installation on page 23.
POWER VENT INSTALLATION
1. Read the General Venting Instructions on page 20 and
Venting Requirements on page 21 before proceeding.
These instructions and requirements must be followed in
addition to the instructions below that are specific for Power
Vent configurations.
2. Determine which Power Vent arrangement will be used for
the installation; vertical or horizontal termination. See Figure
42 and Figure 43 on page 34.
3. Determine the vent pipe size for the installation, see Venting
Requirements on page 21.
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.
NOTE:
Refer to Tables 9 and 10 on page 29 for the equivalent
linear pipe length of AL29-4C® 45° and 90° elbows.
PRIMER AND CEMENT
Tetrahydrofuran (THF) primer should be used to prepare the surfaces
of pipe and fittings for solvent welding. If CPVC or ABS pipe and
fittings are used, then the proper cement must be used for all joints,
including joining the pipe to the factory provided terminations (PVC
material). PVC Materials should use ASTM D-2564 Grade Cement;
CPVC Materials should use ASTM F-493 Grade Cement and ABS
Materials should use ASTM D-2235 Grade Cement.
PIPE SIZE REQUIREMENTS
The water heaters covered in this manual are certified for the use
of 3 and 4 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, 3 inch pipe must be used. If the
installed equivalent length will be more than 50 feet (15.2 m), 4
inch pipe must be used.
NOTE:
Install the pipe size required for the installed equivalent
length of each pipe independently. IE: 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 3 inch
pipe and the vent must be installed using 4 inch pipe.
MAXIMUM EQUIVALENT LENGTHS
Three Inch Pipe
The water heaters covered in this manual are certified to
a maximum length of 3 inch pipe for the exhaust venting
arrangement of 50 equivalent feet (15.2 m). The certified
maximum length of 3 inch pipe for intake air piping is also 50
equivalent feet (15.2 m). IE: 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 4 inch pipe for the exhaust venting
arrangement of 120 equivalent feet (36.5 m). The certified
maximum length of 4 inch pipe for intake air piping is also 120
equivalent feet (36.5 m). IE: On Direct Vent installations both
pipes can be up to 120 equivalent feet (36.5 m).
MINIMUM EQUIVALENT LENGTHS
Three Inch Pipe
The water heaters covered in this manual are certified to a
minimum length of 3 inch pipe for the vent (exhaust) of 7
equivalent feet (2.1 m). There is no minimum equivalent feet
requirement for the intake air pipe.
Four Inch Pipe
The water heaters covered in this manual are certified to
a minimum length of 4 inch pipe for the vent (exhaust) of 50
equivalent feet (15.2 m). There is no minimum equivalent feet
requirement for the intake air pipe.
MAXIMUM NUMBER OF ELBOWS
Three Inch Pipe
The vent pipe may have a maximum of four 90° elbows installed
when 3 inch pipe is being used. The intake air pipe may also
have a maximum of four 90° elbows installed. IE: in a Direct Vent
configuration each pipe can have up to four 90° elbows installed.
NOTE:
Refer to Tables 9 and 10 on page 29 for the equivalent
linear pipe length of AL29-4C® 45° and 90° elbows.
Four Inch Pipe
The vent pipe may have a maximum of six 90° elbows installed
when 4 inch pipe is being used. The intake air pipe may also
have a maximum of six 90° elbows installed. IE: in a Direct Vent
configuration each pipe can have up to six 90° elbows installed.
