Bradford White D100T User manual

238-50845-00B REV 02/16
CONDENSING POWER VENT GAS WATER HEATER
A Spanish language version of these instructions is available by contacting the
company listed on the rating plate.
Hay disponible una versión en español de estas instrucciones al comunicarse con
la compañía que se menciona en la placa de datos de servicio.
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 OPERATION
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 and operation manual will explain in
detail the installation and maintenance of your new
Condensing Power Vent 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
Vent Pipe Preparation and Joining............................................ 19
Combustion Air Supply .............................................................. 21
Water Connections ..................................................................... 23
Condensate Drain Connection................................................... 26
Gas Connections......................................................................... 27
Electrical Connections................................................................ 28
Wiring Diagram...................................................................... 29
GENERAL OPERATION .................................................................... 30
Lighting and Shutdown Instructions ......................................... 31
Thermostat Adjustment .............................................................. 32
Burner Flame Check ................................................................... 33
MAINTENANCE.................................................................................. 34
TROUBLESHOOTING........................................................................ 37
PARTS LIST AND DRAWING ............................................................ 40
INSTALLATION INSTRUCTIONS FOR POTABLE WATER AND
SPACE HEATING............................................................................... 41
NOTES................................................................................................ 42

4
GENERAL INFORMATION
This gas-fired water heater is design certified by CSA International under the
American National Standard Z21.10.3 and CAN/CGA 4.3-M 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
Operation 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 gas
control which has been submerged in water. See the Gas Connections section
of this manual before servicing or replacing a water heater that has had any
external part to the tank submerged in water.
Make sure that you check the rating plate and 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 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-
Sacrificial anodes are used to extend tank life. Anode removal, for any reason
with the exception of anode replacement, except for inspection and/or
replacement, 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 anodes and the impurities in the water. If this should happen,
alternative anodes 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 operation 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 instruction manual before locating
the water heater.
This water heater must be located in an area where leakage of the tank,
condensate trap 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. Verify all condensate tubing is
properly connected to the blower for proper drainage. 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 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 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: 0 inch from the sides and rear, 5 inches (12.7 cm) from the
front of the jacket, 0 inch from the vent connector and 15 inches (38.1 cm) from
the jacket top. Increase distances to provide clearance for servicing.
Venting
Figure 1 - Vent Terminal Clearances
WARNING
Failure to adhere to these installation and operation instructions
may create a hazard to life and property and will nullify the
warranty.

9
Venting continued-
Canadian
Installations1
US 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
36 inches
(91 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 (.6 m)
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 (.9 m)
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
3 feet (.9 m) *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 inches (25.4 cm) above expected
snowfall level to prevent blockage of vent termination.

10
Venting continued-
Vent pipes serving power vent 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 “Locating the
Water Heater” and “Minimum Clearances”, and with the National Fuel Gas
Code and local codes.
All vent pipes and terminals are to have a 1” minimum clearance to
combustibles. DO NOT use the placement of insulation or other materials in the
required clearance spaces surrounding the venting to combustible material
unless otherwise specified.
WARNING
Risk of carbon monoxide poisoning or fire due to joint separation or
pipe breakage.
This water heater must be properly vented and connected to an approved
vent system in good condition. DO NOT operate the water heater with the
absence of an approved vent system. A clean and unobstructed vent
system is necessary to allow noxious fumes that could cause injury or loss of
life to vent safely and will contribute toward maintaining the water heater’s
efficiency. The acceptance of the venting system is dependent upon full
compliance with these installation instructions.
The venting system must not pass through rated fire separations.
The venting system must be free to expand and contract. This venting
system must be supported in accordance with these instructions.
NOTICE
Single Wall Polypropylene venting systems that are listed on the Bradford
White website are approved for use in the water heaters covered in this
instruction manual. The venting system components are ULC S636
approved and listed by a recognized agency and may be installed in the U.S.
and Canada. Complete instructions for the approved venting systems can be
found on the Bradford White website, www.BradfordWhite.com or by calling
the Technical Service Department at: 800-334-3393.
WARNING
The approved polypropylene venting system Instruction Supplement listed on
the Bradford White website for each manufacturer’s venting system must be
carefully read and followed by a qualified installer. Failure to properly install
the vent system may result in property damage, personal injury, or death.

11
Venting continued-
NOTICE
For installations in Canada, field supplied vent piping must comply with
CAN/CGA B149.1 (Latest Edition) and be certified to the Standard For
Type BH, Class II, 65°C, Gas Venting Systems, ULC S636. Components
of this listed system shall not be interchanged with other vent systems or
unlisted pipe/fittings. All components and specified primers and cements
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 under ULC
S636 and are also certified as part of the water heater. Refer to the
following tables for approved venting materials, primers, and cements. All
approved primers and cements are to be used within their marked time
limitations.
Approved Venting Materials
For installations in the US
only
PVC DWV (ASTM D-2665)
PVC Sch. 40, 80, 120 (ASTM-
D1785)
CPVC Sch. 40, 80 (ASTM-
F441)
CPVC (ASTM D2846)
ABS Sch. 40 DWV (ASTM
D2661)
For installations in CANADA
ULC S636 approved PVC for
flue gas venting rated Class II,
65°C
ULC S636 approved CPVC
for flue gas venting rated
Class II, 65°C
ULC S636 approved
Polypropylene for flue gas
venting rated Class II, 65°C
Approved Primers and Cements
For installations in the US
only
PVC and CPVC Primer
(ASTM-F656)
PVC Cement (ASTM D-2564)
CPVC Cement (ASTM F493)
ABS Primer and Cement
(ASTM D-2235)
For installations in CANADA
ULC S636 approved Primer
and Cement for flue gas
venting rated Class II, 65°C
NOTICE
Use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel
®
(polyphenosulfone) in non-metallic venting systems is prohibited.

12
Venting System Condensation
Condensate formation will occur in the venting of this condensing power vent
water heater. In order to effectively drain the condensate from the venting,
tubing has been installed on a factory supplied exhaust adapter with drain
outlet mounts on the blower. The tubing will drain any accumulated
condensate from the venting system.
1. In a horizontal application, it is important that condensate not be
allowed to buildup in the exhaust vent pipe. To prevent this from
happening, the pipe should be installed with a slight upward slope of ¼
inch (.6 cm) per foot (.3 m). The vent system must be supported every
5 feet (1.5 m) of vertical run and every 3 feet (.9 m) of horizontal run of
vent pipe length.
This water heater is a condensing power vented appliance and is designed to
vent its products of combustion through 2” (5.1 cm), 3” (7.6 cm) or 4” (10.2 cm)
diameter vent pipe to the outdoors. This water heater may be either vented
horizontally through the wall or vertically through the roof. Use a 2” (5.1 cm) to
3” (7.6 cm) reducer to connect to the vent outlet when using 3” (7.6 cm) vent
pipe or 2” (5.1 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 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 1, then use 3” (7.6 cm) vent pipe for the
vent connector or 4” (10.2 cm) as necessary.
Table 2 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 2” (5.1 cm) vent pipe needed to go
through the wall is greater than 14” (35.5 cm), use 3” (7.6 cm) 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 elbow fitting is at least 1” (2.5 cm) away from the edge of the
wall.
Table 3 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 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 2” (5.1 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 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 elbow fitting is at least 1” (2.5 cm) away from the
edge of the wall.

13
Venting continued-
TABLE 1 - VENT CONNECTOR LENGTHS
FOR 2” (5.1 cm) DIAMETER VENT PIPE
Terminating # of 90° Elbows
(excl. vent term)
Maximum 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 (9.1) 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 (9.1) 7 (2.1)
TABLE 2 -VENT CONNECTOR LENGTHS
FOR 3” (7.6 cm) DIAMETER VENT PIPE
Terminating # of 90° Elbows
(excl. vent term)
Maximum straight
Length ft (m)
Min. straight
Length ft (m)
Through the Wall 1 115 (35.0) 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 (35.0) 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)
TABLE 3 -VENT CONNECTOR LENGTHS
FOR 4” (10.2 cm) DIAMETER VENT PIPE
Terminating # of 90° Elbows
(excl. vent term)
Maximum straight
Length ft (m)
Min. straight
Length ft (m)
Through the Wall 1 175 (53.3) 10 (3.1)
Through the Wall 2 170 (51.8) 10 (3.1)
Through the Wall 3 165 (50.3) 10 (3.1)
Through the Wall 4 160 (48.8) 10 (3.1)
Through the Wall 5 155 (47.2) 10 (3.1)
Through the Roof 0 180 (54.9) 15 (4.6)
Through the Roof 1 175 (53.3) 15 (4.6)
Through the Roof 2 170 (51.8) 15 (4.6)
Through the Roof 3 165 (50.3) 15 (4.6)
Through the Roof 4 160 (48.8) 15 (4.6)
NOTE: When using 3” (7.6 cm) or 4” (10.2 cm) vent pipe, use a reducer to 2” (5.1 cm) 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.

14
Venting continued-
Connection to 2” (5.1 cm) Connection to a 2” (5.1 cm) to
vent pipe 3” (7.6 cm) reducer
Figure 2
NOTE: When connection is made to a 4” (10.2 cm) vent pipe, the reducer must be
applied to the 2” (5.1 cm) pipe attached to the blower exhaust as shown.
IMPORTANT
All venting connections must be leak checked with a soap and
water solution upon initial startup of the water heater. Any leaks
must be repaired before continuing operation of the water heater.

15
Venting continued-
THROUGH THE WALL VENTING: (HORIZONTAL VENTING)
Cut a 2 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 45° vent terminal provided with the water heater to the vent connector. The
distance between the edges of the 45° 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 (1.5 m) of horizontal
vent.
Figure 3
3” or 4” vent installation
2” vent installation

16
Venting 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
TABLE 4, TABLE 5 or TABLE 6 for the total number of elbows used.
THROUGH THE WALL VENTING WITH LOW GROUND CLEARANCE:
When venting cannot exit through the wall at a height greater than or equal to
12 inches (30.5 cm) above the ground, or anticipated snow level, the
installation must be modified as shown below (see Figure 5). Refer to Table 4
for maximum venting lengths using 2” (5.1 cm) vent pipe, Table 5 for maximum
lengths using 3” (7.6 cm) vent pipe or Table 6 for maximum lengths using 4”
(10.2 cm) vent pipe.

17
Venting continued-
Figure 5
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 TABLE 4, TABLE 5 or TABLE 6 for total number of elbows used.
2” vent installation
3” or 4” vent installation

18
Venting continued-
TABLE 4
2” (5.1 cm) VENT CONNECTOR LENGTHS FROM INSIDE WALL FOR
LOW GROUND CLEARANCE INSTALLATIONS
Terminating # of
Elbows
(excl. vent
term.)
Max Straight
Length ft (m)
Min
straight
Length
ft (m)
(2) 90Elbows with Vent Terminal 1 30 (9.1) 5 (1.5)
(2) 90Elbows with Vent Terminal 2 25 (7.6) 5 (1.5)
(2) 90Elbows with Vent Terminal 3 20 (6.1) 5 (1.5)
(2) 90Elbows with Vent Terminal 4 15 (4.6) 5 (1.5)
TABLE 5
3” (7.6 cm) VENT CONNECTOR LENGTHS FROM INSIDE WALL FOR
LOW GROUND CLEARANCE INSTALLATIONS
Terminating (Reduce 3” to 2”)
(Reduce 7.6 cm to 5.1 cm)
# of
Elbows
(excl. vent
term.)
Max straight
Length ft (m)
Min
straight
Length
ft (m)
(2) 90Elbows with Vent Terminal 1 100 (30.5) 10 (3.1)
(2) 90Elbows with Vent Terminal 2 95 (29.0) 10 (3.1)
(2) 90Elbows with Vent Terminal 3 90 (27.4) 10 (3.1)
(2) 90Elbows with Vent Terminal 4 85 (25.9) 10 (3.1)
(2) 90Elbows with Vent Terminal 5 80 (24.4) 10 (3.1)
TABLE 6
4” (10.2 cm) VENT CONNECTOR LENGTHS FROM INSIDE WALL FOR
LOW GROUND CLEARANCE INSTALLATIONS
Terminating (Reduce 4” to 2”)
(Reduce 10.2 cm to 5.1 cm)
# of
Elbows
(excl. vent
term.)
Max straight
Length ft (m)
Min
straight
Length
ft (m)
(2) 90Elbows with Vent Terminal 1 160 (48.8) 10 (3.1)
(2) 90Elbows with Vent Terminal 2 155 (47.2) 10 (3.1)
(2) 90Elbows with Vent Terminal 3 150 (45.7) 10 (3.1)
(2) 90Elbows with Vent Terminal 4 145 (44.2) 10 (3.1)
(2) 90Elbows with Vent Terminal 5 140 (42.7) 10 (3.1)
HIGH ALTITUDE INSTALLATIONS FOR ELEVATIONS OVER 2,000 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 a high altitude kit.

19
Vent Pipe Preparation and Joining
Most failures in vent systems result from improper preparation and joining of
pipe and fittings. The guidelines below must be followed when installing the
venting system. If you have any question about the application or installation of
the venting system, contact the vent pipe manufacturer, supplier, or your
plumbing professional.
1) Specific cleaners, solvents, primers and cements are available for PVC,
CPVC, and ABS pipe. Be sure these materials match the type of pipe to be
installed. The vent pipe manufacturers joining instructions must be
followed in all cases. Never use all-purpose cements, commercial glues
and adhesives or ABS cement to join PVC or CPVC pipe and fittings.
Refer to the table at the beginning of the “Venting” section for approved
primers and cements.
a) CLEANERS, SOLVENTS, PRIMERS AND CEMENTS ARE
FLAMMABLE. Do not store or use these materials near heat or
open flame, or in the vicinity of other appliances.
2) Use proper cutting, deburring and applicator tools to ensure proper
preparation and joining of pipe and fittings.
a) Cutting Tools
i) A square cut must be achieved with a miter box saw or pipe cutter
to ensure a proper mating with the female. If a pipe cutter is used,
the burr created at the outer edge of the pipe must be removed.
b) Deburring Tools
i) A file, knife or plastic deburring tool can be used to remove burrs.
Burrs must be removed from the inside and outside edges of the
pipe to ensure a proper seal.
c) Applicator Tools
i) A natural bristle paintbrush or roller may be used to apply cement.
Prompt application of the cement is important due its fast drying
properties.
3) Inspection, Cleaning, Priming and Cementing
a) Inspect the pipe inside and out for dirt, dust, moisture or grease etc.
Check pipe and fittings for splits or cracks and replace if found.
b) Clean pipe and fittings are imperative for proper joining. Following
cutting and deburring, wipe away any foreign material with a clean dry
rag. If wiping fails to thoroughly clean surfaces, chemical cleaning is
necessary.
c) Primer must be applied to the pipe surface and fitting socket with a
natural bristle brush. This serves to soften and prepare the pipe for
cementing.

20
Vent Pipe Preparation and Joining continued-
d) Cementing must be done quickly to avoid over-drying before joining.
i) Apply one coat to the outside end of the pipe at a width slightly
greater than the depth of the socket.
ii) Apply a coat around the inside of the fitting socket.
iii) Apply a second coat around the end of the pipe.
4) Joining
a) Joints should be made immediately after cement is applied.
b) After fully inserting pipe into fitting socket, hold joint together for about
15 to 20 seconds.
c) Remove excess cement from around pipe and fitting with a clean rag.
d) Cement drying times may vary. Be sure to allow for the recommended
drying time before disturbing joints.
For more specific and detailed information about the above, contact the vent
pipe manufacturer, supplier, or competent professional.