Bradford White POWER VENTED GAS WATER HEATER User manual

238-45917-00F REV 3/08
POWER VENTED GAS WATER HEATER
A Spanish language version of these instructions is available by contacting the
company listed on the rating plate.
La version espanola de estas instrucciones se puede obtener al escribirle a la
fabrica cuyo nombre aparece en la placa de especificaciones.
WHAT TO DO IF YOU SMELL GAS
•Do not try to light any appliance.
•Do not touch any electrical switch; do not use any
phone in your building.
•Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier's instructions.
•If you cannot reach your gas supplier, call the fire
department.
Installation and service must be performed by a qualified
installer, service agency or the gas supplier.
For your family’s comfort, safety and convenience we
recommend this water heater be installed and serviced by a
plumbing professional.
INSTALLATION AND OPERATING
INSTRUCTION MANUAL
FOR YOUR SAFETY
Do not store or use gasoline or other flammable,
combustible, or corrosive vapors and liquids in the
vicinity of this or any other appliance.
WARNING: If the information in these instructions is not
followed exactly, a fire or explosion may result causing
property damage, personal injury, or death.

2
CONGRATULATIONS!
You have just purchased one of the finest water
heaters on the market today!
This installation, operation and instruction manual will
explain in detail the installation and maintenance of
your new Power Vented Gas Water Heater. We
strongly recommend that you contact a plumbing
professional for the installation of this water heater.
We require that you carefully read this manual, as well
as the enclosed warranty, and refer to it when
questions arise. If you have any specific questions
concerning your warranty, please consult the
plumbing professional from whom your water heater
was purchased. For your records we recommend that
you write the model, serial number and installation
date of your water heater in the maintenance section in
the back of this manual.
This manual should be kept with the water heater.

3
TABLE OF CONTENTS page
GENERAL INFORMATION................................................................. 4
INSTALLATION.................................................................................. 5
Locating The Water Heater......................................................... 5
Minimum Clearances .................................................................. 8
Venting......................................................................................... 8
Specifications for
25 Gal (94.6 L)
48 Gal (181.6 L)
55 Gal (208.2 L)
65 Gal (246.0 L)
75 Gal (283.9 L)................................................................ 11
Specifications for
40 Gal (151.4 L)
50 Gal (189.2 L)................................................................ 17
Vent Pipe Preparation and Joining............................................ 23
Combustion Air Supply .............................................................. 25
Water Connections...................................................................... 27
Gas Connections......................................................................... 30
Electrical Connections................................................................ 31
Wiring Diagram...................................................................... 32
GENERAL OPERATION .................................................................... 33
Lighting and Shutdown Instructions......................................... 34
Thermostat Adjustment.............................................................. 35
Burner Flame Check ................................................................... 36
MAINTENANCE.................................................................................. 37
TROUBLESHOOTING........................................................................ 40
PARTS LIST DRAWING..................................................................... 42
PARTS LIST ....................................................................................... 42
INSTALLATION INSTRUCTIONS FOR POTABLE WATER AND
SPACE HEATING............................................................................... 43
NOTES................................................................................................ 44

4
GENERAL INFORMATION
This gas-fired water heater’s design is certified by CSA International under the
American National Standard Z21.10.1, CSA 4.1-M, Z21.10.3 and CSA 4.3 most
current editions at the time of manufacture.
This water heater must be installed in accordance with local codes or, in the
absence of local codes, the National Fuel Gas Code, ANSI Z223.1-Latest
Edition) and/or in Canada CAN/CGA B149 Installation Codes (Latest Editions).
The warranty for this water heater is in effect only when the water heater is
installed, adjusted, and operated in accordance with these Installation and
Operating Instructions. The manufacturer will not be held liable for any damage
resulting from alteration and/or failure to comply with these instructions.
This water heater is not design certified for installation in a mobile home. Such
an installation may create a hazardous condition and will nullify the warranty.
Do not use this appliance if any external part to the tank has been submerged
in water. You should contact a qualified service technician to inspect the
appliance and to replace any part of the control system including the
combination gas control which has been submerged in water.
Make sure that you check the rating plate and combination gas control on the
water heater to be certain that the type of gas being supplied corresponds with
the marking on the rating plate and combination gas control.
CAUTION
Incorrect operation of this appliance may create a hazard to life and
property and will nullify the warranty.
DANGER
Do not store or use gasoline or other flammable, combustible, or
corrosive vapors and liquids in the vicinity of this or any other
appliance.
IMPORTANT
Before proceeding, please inspect the water heater and its components for
possible damage. DO NOT install any water heater with damaged
components. If damage is evident then please contact the supplier where
the water heater was purchased or the manufacturer listed on the rating
plate for replacement parts.

5
General Information continued-
A sacrificial anode is used to extend tank life. The removal of this anode, for
any reason, will nullify the warranty. In areas where water is unusually active,
an odor may occur at the hot water faucet due to a reaction between the
sacrificial anode and the impurities in the water. If this should happen, an
alternative anode may be purchased from the supplier that installed this water
heater. This will minimize the odor while protecting the tank. Additionally, the
water heater should be flushed with appropriate dissolvers to eliminate any
bacteria.
INSTALLATION
Locating The Water Heater
DO NOT install the water heater in any location where gasoline or
flammable vapors are likely to be present.
Water Heaters in residential garages must be installed so that all
burner(s) and burner ignition device(s) are located not less than 18 inches
(46 cm) above the floor and must be located or protected to avoid
physical damage. For other installations refer to local codes. In the
absence of local codes, the water heater must be installed in compliance
with the National Fuel Gas Code, ANSI Z223.1 - (Latest Edition) and/or in
Canada, CAN/CGA B149 Installation Codes (Latest Editions).
The location of this water heater is of the utmost importance. Before installing
this water heater, read the installation section of these instructions. After
reading these installation and operating instructions, select a location for the
water heater where the floor is level and is easily accessible to gas and water
supply lines. DO NOT locate the water heater where water lines could be
subjected to freezing temperatures. Make sure the cold water pipes are
not located directly above the gas control so that condensate during
humid weather does not drip on the controls.
WARNING
Water heaters are heat producing appliances. To avoid damage or injury, do
not store materials against the water heater or vent-air intake system. Use
proper care to avoid unnecessary contact (especially by children) with the
water heater and vent-air intake components. UNDER NO CIRCUMSTANCES
MUST FLAMMABLE MATERIALS, SUCH AS GASOLINE OR PAINT
THINNER BE USED OR STORED IN THE VICINITY OF THIS WATER
HEATER, VENT-AIR INTAKE SYSTEM OR IN ANY LOCATION FROM
WHICH FUMES COULD REACH THE WATER HEATER OR VENT-AIR
INTAKE SYSTEM.

6
Installation (Locating The Water Heater) continued-
Water heater corrosion and component failure can be caused by the heating
and breakdown of airborne chemical vapors. Examples of some typical
compounds that are potentially corrosive are: spray can propellants, cleaning
solvents, refrigerator and air conditioning refrigerants, swimming pool
chemicals, calcium and sodium chloride, waxes and process chemicals. These
materials are corrosive at very low concentration levels with little or no odor to
reveal their presence. NOTE: DAMAGE TO THE WATER HEATER CAUSED
BY EXPOSURE TO CORROSIVE VAPORS IS NOT COVERED BY THE
WARRANTY. DO NOT OPERATE THE WATER HEATER IF EXPOSURE
HAS OR WILL OCCUR. DO NOT STORE ANY POTENTIALLY CORROSIVE
COMPOUNDS IN THE VICINITY OF THE WATER HEATER.
To comply with NSF requirements this water heater is to be:
a) Sealed to the floor with sealant, in a smooth and easily cleanable way,
or
b) Installed with an optional leg kit that includes legs and/or extensions
that provide a minimum clearance of 6” beneath the water heater.
WARNING
Liquefied petroleum gases/propane gas are heavier than air and
will remain at floor level if there is a leak. Basements, crawl
spaces, closets, and areas below ground level will serve as
pockets for accumulation of leaking gas. Before lighting, smell
all around the appliance area for gas. Be sure to smell next to
the floor.
IF YOU SMELL GAS:
•Do not try to light any appliance.
•Do not touch any electric switch; do not use any telephone in
your building.
•Immediately call your gas supplier from a neighbor’s
telephone. Follow the gas supplier’s instructions.
•If you cannot reach your gas supplier, call the fire
department.
DO NOT OPERATE APPLIANCE UNTIL THE LEAKAGE IS
CORRECTED!

7
Installation (Locating The Water Heater) continued-
The water heater must be located close enough to the outside wall to keep the
venting distance within the maximum distance described in the installation
instructions. Read the venting section in this installation instruction manual
before locating the water heater.
This water heater must be located in an area where leakage of the tank or
water line connections and the combination temperature and pressure relief
valve will not result in damage to the area adjacent to the water heater or to
lower floors of the structure. When such locations cannot be avoided, a suitable
drain pan adequately piped for proper drainage must be installed under the
water heater. The pan must not restrict combustion air flow. The drain pan
must have a minimum length and width of at least 4 in. (10.2 cm) greater than
the diameter of the water heater and must not restrict proper combustion air
flow to the water heater. The drain pan, as described above, can be purchased
from your plumbing professional. The drain pan must be piped to an adequate
drain. The piping must be at least 3/4 inch (1.9 cm) in diameter and pitched for
proper drainage.
It is recommended that a minimum clearance of four (4) inches (10.2 cm) be
provided on the side of the water heater for servicing and maintenance of the
combination temperature and pressure relief valve.
This water heater MUST be installed indoors out of the wind and weather.
Note: For California installation this water heater must be braced,
anchored, or strapped to avoid falling or moving during an earthquake.
See instructions for correct installation procedures. Instructions may be
obtained from DSA Headquarters Office, 1102 Q Street, Sacramento, CA
95811.
WARNING
DO NOT ATTEMPT TO LIGHT ANY GAS APPLIANCE IF YOU ARE NOT
CERTAIN OF THE FOLLOWING:
•Liquefied petroleum gases/propane gas and natural gas have an
odorant added by the gas supplier that aids in the detection of the
gas.
•Most people recognize this odor as a “sulfur” or “rotten egg” smell.
•Other conditions, such as “odorant fade” can cause the odorant to
diminish in intensity, or ”fade”, and not be as readily detectable.
•If you have a diminished sense of smell, or are in any way unsure of
the presence of gas, immediately contact your gas supplier from a
neighbor’s telephone.
•Gas detectors are available. Contact your gas supplier, or plumbing
professional, for more information.

8
Minimum Clearances
This installation must allow access to the front of the water heater and
adequate clearance must be provided for servicing and operating this water
heater. The water heater may be installed on either a combustible or non-
combustible floor. If the water heater is to be installed directly on carpeting, it
must be installed on top of a metal or wood panel extending beyond the full
width and depth of the appliance by at least three (3) inches (7.6 cm) in any
direction or, if the appliance is to be installed in an alcove or closet, the entire
floor must be covered by the panel. The minimum clearances to combustibles
for this water heater are: zero (0) inch (0 cm) from the sides and rear, five (5)
inches (12.7 cm) from the front of the jacket, zero (0) inch (0 cm) from the vent
connector and fifteen (15) inches (38.1 cm) from the jacket top.
Venting
This venting section is divided into two parts. Part I will cover venting
specifications for 25 Gal (94.6 L), 48 Gal (181.6 L), 55 Gal (208.2 L), 65 Gal
(246.0 L), and 75 Gal (283.9 L) models. Part II will cover venting
specifications for 40 Gal (151.4 L) and 50 gal (189.2 L) models. Refer to
the rating plate located on the water heater for correct model
identification.
Figure 1 - Vent Terminal Clearances
WARNING
Failure to adhere to these installation and operating instructions may
create a hazard to life and property and will nullify the warranty.

9
Venting continued-
Canadian
Installations1US Installations2
A= Clearance above grade, veranda,
porch, deck or balcony 12 inches (30 cm) 12 inches (30 cm)
B= Clearance to window or door that may
be opened 12 inches (30 cm) 4 feet (1.2 m) below or to the side of opening;
12 inches (30 cm) above
opening
C= Clearance to permanently closed
window *b *b
D= Vertical clearance to ventilated soffit
located above the terminal within a
horizontal distance of 2 feet (61 cm)
from the center line of the terminal
*b *b
E= Clearance to unventilated soffit *b *b
F= Clearance to outside corner *b *b
G= Clearance to inside corner *b *b
H= Clearance to each side of center line
extended above meter/regulator
assembly
3 feet (91 cm)
within a height
15 feet (4.6 m)
above the
meter/regulator
assembly
*b
I= Clearance to service regulator vent
outlet or oil tank vent 36 inches (91 cm) *b
J= Clearance to non-mechanical air
supply inlet to building or the
combustion air inlet to any other
appliance
12 inches (30
cm) 4 feet (1.2m) below or to side of opening; 12
inches (30 cm) above
opening.
K= Clearance to a mechanical air supply
inlet 6 feet (1.83 m) 3 feet (91 cm) above if within 10 feet
horizontally
L= Clearance above paved sidewalk or
paved driveway located on public
property
7 feet
(2.13 m)† 7 feet (2.13 m)†
M= Clearance under a veranda, porch,
deck, or balcony 12 inches (30 cm) ‡ *b
1 In accordance with the current CAN/CGA-B149 Installation Codes.
2 In accordance with the current ANSI Z223.1-(Latest edition)/NFPA 54 National Fuel Gas Code.
† A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single-
family dwellings and serves both dwellings.
‡ Permitted only if a veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the
floor.
*a) A minimum clearance value determined by testing in accordance with section 2.20.
*b) “Clearance in accordance with local installation codes and the requirements of the gas supplier”.
The vent system must terminate so that proper clearances are maintained as cited
in local codes or the latest edition of the National Fuel Gas Code, ANSI
Z223.1.73.4e and 7.8a, b as follows:
1. Do not terminate near soffit vents or crawl space or other area where condensate or
vapor could create a nuisance or hazard or cause property damage.
2. Do not terminate the exhaust vent terminal where condensate or vapor could cause
damage or could be detrimental to the operation of regulators, relief valves, or other
equipment.
3. Do not terminate the exhaust vent terminal over public area or walkways where
condensate or vapor can cause nuisance or hazard.
4. The vent shall terminate a minimum of 12” (25.4 cm) above expected snowfall level
to prevent blockage of vent termination.

10
Venting continued-
Vent pipes serving power vented appliances are classified by building codes as
“vent connectors”. Required clearances from combustible materials must be
provided in accordance with information in this manual under LOCATION OF
WATER HEATER and CLEARANCES, and with National Fuel Gas Code and
local codes.
Venting System Condensation
Condensate formation does not occur in all installations of power vented water
heaters, but should be protected against on installations where condensation
can form in the venting system.
Formation of condensation in the venting system of Power Vented water
heaters is dependent upon installation conditions including, but not limited to:
ambient temperature and humidity of installation location;
ambient temperature and humidity of venting space;
vent distance and slope;
and product usage.
In order to effectively control condensate from adversely affecting the
mechanical components of the water heater several methods may be
employed:
1. For horizontal installations the vent pipe can be installed with a
downward slope (not less than 1/8" (3 cm)) and away from the blower.
2. In order to prevent condensate from draining back into the blower
(vertical or horizontal runs), an optional condensate kit is available as a
service part (Condensate kit, p/n 238-45875-00). A factory supplied
exhaust adapter with drain outlet mounts directly to the blower outlet
and is secured with two hose clamps, one to the blower and the other
to the vent pipe. Plastic tubing is provided to drain any accumulated
condensate away from the water heater and to a suitable drain. The kit
comes complete with instructions for proper installation.
NOTICE
For installations in Canada, field supplied plastic vent piping must comply
with CAN/CGA B149.1 (latest edition) and be certified to the Standard For
Type BH Gas Venting Systems, ULC S636. Components of this listed
system shall not be interchanged with other vent systems or unlisted
pipe/fittings. All plastic components and specified primers and glues of the
certified vent system must be from a single system manufacturer and not
intermixed with other system manufacturer’s vent system parts.
The supplied vent connector and vent termination are certified as part of the
water heater.

11
Part I - Venting Specifications for:
25 Gallon (94.6 L), 48 Gallon (181.6 L),
55 Gallon (208.2 L), 65 Gallon (246.0 L)
75 Gallon (283.9 L)
NOTE: Properly sized PVC, CPVC, or ABS* pipe must be used.
This water heater is a power vented appliance and is designed to vent its
products of combustion through 3” (7.6 cm) or 4” (10.2 cm) diameter Schedule
40 (solid or cellular core) vent pipe to the outdoors. This water heater may be
either vented horizontally through the wall or vertically through the roof. Use a
3” (7.6 cm) to 4” (10.2 cm) reducer to connect to the vent outlet when using 4”
(10.2 cm) vent pipe. Apply the proper cement at the joint locations. Table 1
lists the maximum vent lengths for this water heater using 3” (7.6 cm) vent pipe.
If possible, locate the water heater so that the venting length and number of
elbows are kept to the minimum distance necessary to reach the outside. If the
installation requires venting lengths that exceed the lengths listed for 3” (7.6
cm) vent pipe in Table 1, then use 4” (10.2 cm) vent pipe for the vent
connector. Table 2 lists the venting distances allowed with 4” (10.2 cm)
diameter vent pipe. When venting with 4” (10.2 cm) vent pipe, use a 4” (10.2
cm) to 3” (7.6 cm) reducer to exit through the building wall with 3” (7.6 cm) vent
pipe. Use the 3” (7.6 cm) vent terminal supplied with the water heater to
terminate on the outside of the building. If the length of 3” (7.6 cm) vent pipe
needed to go through the wall is greater than 14” (35.5 cm), use 4” (10.2 cm) to
go through the wall and reduce to 3” (7.6 cm) vent pipe immediately after
exiting the outside wall. Refer to the venting illustrations on the following
pages. Make sure the vent pipe terminal elbow fitting is at least 1” (2.5 cm)
away from the edge of the wall.
*Only vent pipe certified to ULC S636 may be used in Canada.
TABLE 1 - VENT CONNECTOR LENGTHS
FOR 3” (7.6 cm) DIAMETER VENT PIPE
Maximum straight
Length ft (m)
Terminating # of
Elbows 48, 65 gal. 25, 55 and
75 gal.
Minimum
straight
Length ft (m)
Through the Wall 1 55 (16.8) 45 (13.7) 2 (.6)
Through the Wall 2 50 (15.2) 40 (12.2) 2 (.6)
Through the Wall 3 45 (13.7) 35 (10.7) 2 (.6)
Through the Wall 4 40 (12.2) 30 (9.1) 2 (.6)
Through the Roof 0 60 (18.3) 50 (15.2) 7 (2.1)
Through the Roof 1 55 (16.8) 45 (13.7) 7 (2.1)
Through the Roof 2 50 (15.2) 40 (12.2) 7 (2.1)
Through the Roof 3 45 (13.7) 35 (10.7) 7 (2.1)

12
Venting (Part I) continued-
TABLE 2 -VENT CONNECTOR LENGTHS
FOR 4” (10.2 cm) DIAMETER VENT PIPE
Maximum straight
Length ft (m)
Terminating # of 90°
Elbows 48, 65 gal. 25, 55 and
75 gal.
Min
straight
Length
ft (m)
Through the Wall 1 175 (53.3) 175 (53.3) 10 (3.1)
Through the Wall 2 170 (51.8) 170 (51.8) 10 (3.1)
Through the Wall 3 165 (50.3) 165 (50.3) 10 (3.1)
Through the Wall 4 160 (48.8) 160 (48.8) 10 (3.1)
Through the Wall 5 155 (47.2) 155 (47.2) 10 (3.1)
Through the Roof 0 180 (54.9) 180 (54.9) 15 (4.6)
Through the Roof 1 175 (53.3) 175 (53.3) 15 (4.6)
Through the Roof 2 170 (51.8) 170 (51.8) 15 (4.6)
Through the Roof 3 165 (50.3) 165 (50.3) 15 (4.6)
Through the Roof 4 160 (48.8) 160 (48.8) 15 (4.6)
NOTE: When using 4” (10.2 cm) vent pipe, use a 4” (10.1 cm) to 3” (7.6
cm) reducer and exit the building wall with 3” (7.6 cm) vent pipe using the
3” (7.6 cm) 90°vent terminal supplied. Two 45°elbows are equivalent to
one 90°elbow.
CONNECTION TO A 3” (7.6 CM) TO
4” (10.2 CM) REDUCER
CONNECTION TO 3” (7.6 CM)
VENT PIPE
Figure 2
IMPORTANT
All of the Venting connections must be leak checked with a soap and
water solution upon initial start up of the water heater. Any leaks must
be repaired before continuing operation of the water heater.

13
Venting (Part I) continued-
THROUGH THE WALL VENTING: (HORIZONTAL VENTING)
Cut a 3 1/2 in. (8.9 cm) diameter hole in the wall at the point where the vent
connector is going to pass through the wall. Use the proper cement to secure
the 90° vent terminal provided with the water heater to the vent connector. The
distance between the edge of the 90° vent terminal and the exterior wall (see
Figure 3) must be 1 in. (2.5 cm). Use the proper cement and assembly
procedures to secure the vent connector joints between the terminal and the
blower outlet. Provide support brackets for every 5 feet (1.5m) of horizontal
vent.
Figure 3

14
Venting (Part I) continued-
THROUGH THE ROOF VENTING: (VERTICAL VENTING)
Cut the necessary holes through the roof and ceiling and install the vent
connector as shown in Figure 4. Make sure that the installation meets the local
codes and/or The National Fuel Gas Code ANSI Z223.1 (Latest Edition) or
CGA/CAN B149 Installation Code (latest edition).
Figure 4
NOTE: For installations requiring both horizontal and vertical runs, the
following rule must be followed: Total length of straight pipe (both
horizontally and vertically) must not exceed the allowable length listed in
the “Through The Wall” section of the table for total number of elbows
used.

15
Venting (Part I) continued-
THROUGH THE WALL VENTING WITH LOW GROUND CLEARANCE:
When venting cannot exit through the wall at a height greater than or equal to
12” (30.5 cm) above the ground, or anticipated snow level, the installation must
be modified as shown below (see Figure 5). Refer to Table 3 for maximum
venting lengths using 3” (7.6 cm) vent pipe or Table 4 for maximum lengths
using 4” (10.2 cm) vent pipe.
Figure 5

16
Venting (Part I) continued-
TABLE 3
3” (7.6 cm) VENT CONNECTOR LENGTHS FROM INSIDE WALL FOR
LOW GROUND CLEARANCE INSTALLATIONS
Max Straight
Length ft (m)
Terminating # of
Elbows 48,65
gal. 25, 55
and 75
gal.
Min
straight
Length
ft (m)
(2) 90°Elbows with (1) 90°Elbow 1 40 (12.2) 30 (9.1) 5 (1.5)
(2) 90°Elbows with (1) 90°Elbow 2 35 (10.7) 25 (7.6) 5 (1.5)
(2) 90°Elbows with (1) 90°Elbow 3 30 (9.1) 20 (6.1) 5 (1.5)
(2) 90°Elbows with (1) 90°Elbow 4 25 (7.6) 15 (4.6) 5 (1.5)
TABLE 4
4” (10.2 cm) VENT CONNECTOR LENGTHS FROM INSIDE WALL FOR
LOW GROUND CLEARANCE INSTALLATIONS
Max straight
Length ft (m)
Terminating (Reduce 4” to 3”)
(Reduce 10.1 cm to 7.6 cm)
# of
Elbows 48,65
gal. 25, 55
and 75
gal.
Min
straight
Length
ft (m)
(2) 90°Elbows with (1) 90°Elbow 1 160
(48.8) 160 (48.8) 10 (3.1)
(2) 90°Elbows with (1) 90°Elbow 2 155
(47.2) 155 (47.2) 10 (3.1)
(2) 90°Elbows with (1) 90°Elbow 3 150
(45.7) 150 (45.7) 10 (3.1)
(2) 90°Elbows with (1) 90°Elbow 4 145
(44.2) 145 (44.2) 10 (3.1)
(2) 90°Elbows with (1) 90°Elbow 5 140
(42.7) 140 (42.7) 10 (3.1)
HIGH ALTITUDE INSTALLATIONS FOR ELEVATIONS OVER 2,500
FEET (762 m) ABOVE SEA LEVEL
The capacity of the induced draft blower declines with increasing altitude due to
a reduction in the air density. In order to assure safe and reliable performance
of the water heater, contact the supplier for high altitude kit.

17
Part II - Venting Specifications for:
40 Gallon (151.4 L)
50 Gallon (189.2 L)
This water heater is a power vented appliance and is designed to vent its
products of combustion through 2” (5.1 cm) or 3” (7.6 cm) diameter Schedule
40 (solid or cellular core) vent pipe to the outdoors. The water heater may be
either vented horizontally through the wall or vertically through the roof. Use a
3” (7.6 cm) to 2” (5.1 cm) reducer to connect to the vent outlet when using 3”
(7.6 cm) vent pipe. Apply proper cement at joint locations. Table 5 lists the
maximum vent lengths for this water heater using 2” (5.1 cm) vent pipe. If
possible, locate the water heater so that the venting length and number of
elbows are kept to the minimum distance necessary to reach the outside. If the
installation requires venting lengths that exceed the lengths listed for 2” (5.1
cm) vent pipe in Table 5 then use 3” (7.6 cm) vent pipe for the vent connector.
Table 6 lists the venting distances allowed with 3” (7.6 cm) diameter vent pipe.
When venting with 3” (7.6 cm) vent pipe, use a 3” (7.6 cm) to 2” (5.1 cm)
reducer to exit through the building wall with 2” (5.1 cm) vent pipe. Use the 2”
(5.1 cm) vent terminal supplied with the water heater to terminate on the
outside of the building. If the length of the 2” (5.1 cm) needed to go through the
wall is greater than 14” (35.6 cm), use 3” (7.6 cm) vent pipe to go through the
wall and reduce to 2” (5.1 cm) vent pipe immediately after exiting the outside
wall. Refer to the venting illustrations on the following pages. Make sure the
vent pipe terminal is at least 1” (2.5 cm) away from the edge of the wall.
TABLE 5
VENT CONNECTOR LENGTHS FOR 2” (5.1cm) DIAMETER VENT PIPE
Terminating # of 90°Elbows
(excluding vent
terminal)
Max straight
Length
ft (m)
Min straight
Length
ft (m)
Through the Wall 1 45 (13.7) 2 (.6)
Through the Wall 2 40 (12.2) 2 (.6)
Through the Wall 3 35 (10.7) 2 (.6)
Through the Wall 4 30 (9.2) 2 (.6)
Through the Roof 0 50 (15.2) 7 (2.1)
Through the Roof 1 45 (13.7) 7 (2.1)
Through the Roof 2 40 (12.2) 7 (2.1)
Through the Roof 3 35 (10.7) 7 (2.1)
Through the Roof 4 30 (9.2) 7 (2.1)

18
Venting (Part II) continued-
TABLE 6
VENT CONNECTOR LENGTHS FOR 3” (7.6 cm) DIAMETER VENT PIPE
Terminating # of 90°Elbows
(excluding vent
terminal)
Max straight
Length
ft (m)
Min straight
Length
ft (m)
Through the Wall 1 115 (35) 10 (3.1)
Through the Wall 2 110 (33.5) 10 (3.1)
Through the Wall 3 105 (32.0) 10 (3.1)
Through the Wall 4 100 (30.5) 10 (3.1)
Through the Wall 5 95 (29.0) 10 (3.1)
Through the Roof 0 120 (36.6) 15 (4.6)
Through the Roof 1 115 (35) 15 (4.6)
Through the Roof 2 110 (33.5) 15 (4.6)
Through the Roof 3 105 (32.0) 15 (4.6)
Through the Roof 4 100 (30.5) 15 (4.6)
NOTE: When using 3” (7.6 cm) vent pipe, use a 3” (7.6 cm) to 2” (5.1 cm)
reducer and exit the building wall with 2” (5.1 cm) vent pipe using the 2”
(5.1 cm) 45°vent terminal supplied. Two 45°elbows are equivalent to one
90°elbow. Each 90° elbow is equivalent to 5 feet (1.5 m) of straight vent
pipe.
CONNECTION TO 2” (5.1 CM)
VENT PIPE CONNECTION TO 3” (7.6 CM) VENT PIPE
Figure 6

19
Venting (Part II) continued-
NOTE: Properly sized PVC, CPVC or ABS pipe must be used.
THROUGH THE WALL VENTING: (HORIZONTAL VENTING)
Cut a 2 1/2 in. (6.4 cm) diameter hole in the wall at the point where the vent
connector is going to pass through the wall. Use the proper cement to secure
the 45° vent terminal provided with the water heater to the vent connector. The
distance between the edge of the 45° vent terminal and the exterior wall (see
Figure 7) must be at least 1 in. (2.5 cm). Use the proper cement and assembly
procedures to secure the vent connector joints between the terminal and the
blower outlet. Provide support brackets for every 5 feet (1.5 m) of horizontal
vent.
Figure 7
IMPORTANT
All of the Venting connections must be leak checked with a soap and
water solution upon initial start up of the water heater. Any leaks must
be repaired before continuing operation of the water heater.

20
Venting (Part II) continued-
THROUGH THE ROOF VENTING: (VERTICAL VENTING)
Cut the necessary holes through the roof and ceiling and install the vent
connector as shown in Figure 8. Make sure that the installation meets the local
codes and/or The National Fuel Gas Code ANSI Z223.1 (Latest Edition) or
CGA/CAN B149 Installation Code (latest edition).
Figure 8