Bradford White PDX1-40S6FBN Installation And Operating Instruction Manual
238-47936-00F REV 7/12
POWERED DIRECT VENT 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 Powered Direct 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.
Special Flammable Vapor Ignition Resistant System:
This water heater is equipped with a Flammable Vapor Ignition Resistant System. In
the event of improper usage or storage of gasoline or other flammable materials in
the location where the water heater is installed, the technology will resist ignition of
the flammable vapors outside the confines of the water heater.
The Flammable Vapor Ignition Resistant System features:
Flammable Vapor Sensor.
Automatic Ignition Device.
Sight Window to observe operation of pilot and burner.
FOR YOUR SAFETY: Activation of the Flammable Vapor Ignition Resistant System
occurs when flammable vapors are present in the room where the water heater is
installed. If flammable vapors are detected and/or sensed:
Do not try to light any appliance.
Do not touch any electrical switch; Do not use any phone in your building.
Leave the premises and immediately call the fire department from a
neighbor’s phone. Follow the fire department’s instructions.
Once the flammable vapor has been evacuated, contact your plumbing professional
or the manufacturer for further instructions. Replacement of a Flammable Vapor
Ignition Resistant System equipped water heater due to a flammable vapor
shutdown is not covered under the terms of the limited warranty.
3
TABLE OF CONTENTS
page
GENERAL INFORMATION ................................................................. 4
INSTALLATION. ................................................................................. 5
Locating The Water Heater ......................................................... 5
Minimum Clearances .................................................................. 8
Venting ......................................................................................... 8
Specifications for
48 Gal. (181.6 L)
65 Gal. (246.8 L)
75 Gal. (283.9 L) ..................................................................... 13
Specifications for
40 Gal. (151.4 L)
50 Gal. (189.2 L) ..................................................................... 25
Vent pipe preparation and joining ................................................... 36
Water Connections ...................................................................... 37
Gas Connections ......................................................................... 40
Electrical Connections ................................................................ 41
Wiring Diagram...................................................................... 42
GENERAL OPERATION .................................................................... 43
Lighting and Shutdown Instructions ......................................... 44
Thermostat Adjustment .............................................................. 45
Burner Flame Check ................................................................... 46
MAINTENANCE .................................................................................. 47
TROUBLESHOOTING ........................................................................ 51
PARTS LIST AND PARTS LIST DRAWING ...................................... 53
INSTALLATION INSTRUCTIONS FOR POTABLE WATER AND
SPACE HEATING ............................................................................... 54
NOTES ................................................................................................ 55
4
GENERAL INFORMATION
This gas-fired water heater’s design is certified by CSA International under the
American National Standard Z21.10.1 and CSA 4.1-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
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 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 and 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), or in Canada CAN/CGA B149.1 Natural Gas Installation Code
(Latest Edition) or CAN/CGA B149.2 Propane Installation Code (Latest
Edition).
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 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, Suite 5100,
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 noncombustible 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. Increase
distances to provide clearance for servicing.
Venting
Figure 1 – Direct 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
Installations
1
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
12 inches
(30 cm)
12 inches
(30 cm)
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)
12 inches
(30 cm)
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) ‡
12 inches
(30 cm) ‡
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 singlefamily 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.
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.
NOTICE
In locations where sustained outside air temperatures are below freezing, it is
possible for the vent terminations to accumulate ice build-up due to adverse local
climate conditions (prevailing wind direction, wind speed, termination orientation,
etc.). The optional concentric vent terminal is more resistant to this ice build-up.
In more severe temperature conditions, an optional manufacturer approved air
intake relief device is available and may be installed, per the instructions, to
prevent nuisance shut down of the water heater. The air intake relief device may
be installed with the concentric vent termination or the standard separate vent
terminations. Consult the concentric vent and/or the air intake relief device
instructions for installation requirements.
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 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.
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.
11
Venting continued-
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, 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.
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.
12
Approved Venting Materials
For installations in the US
only
PVC (ASTM D-2241 Schedule
40, ASTM D-1785; or Cellular
Core Schedule 40 DWV,
ASTM F-891)
CPVC (ASTM F-411 Schedule
40)
ABS (ASTM D-2235)
All fittings (other than the
components supplied with the
water heater) should be
equivalent to:
PVC-DWV
(ASTM-F-2665), CPVC
(ASTM F-438), or ABS
(ASTM D-266/3311)
For installations in CANADA
ULC S636 approved CAN-COM
VENTING SYSTEM schedule
40 PVC for flue gas venting
rated Class II, 65°C
(components provided with
water heater)
IPEX ULC S636 approved
schedule 40 PVC (all other
vent pipe/ fittings)
Approved Primers and Cements
For installations in the US
only
PVC and CPVC Primer (ASTM
F-656)
PVC and CPVC Cement
(ASTM D-2564)
ABS Primer and Cement
(ASTM D-2235)
For installations in CANADA
IPEX ULC S636 approved PVC
Primer and Cement for flue
gas venting rated Class II,
65°C
13
Venting System Condensation
Condensate formation does not occur in all installations of power direct 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 mm)) 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 239-45875-00). 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. 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.
PART I - Venting Specifications for:
48 Gallon (181.6L)
65 Gallon (246.0L)
75 Gallon (283.9L)
This water heater is a power vented appliance and is designed to intake and
exhaust the products of combustion through 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 3” (7.6 cm) to
4” (10.2 cm) reducer to connect to the intake and 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) intake and
exhaust 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.
14
Venting continued-
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.
IMPORTANT
The minimum equivalent length for the exhaust portion of the vent is 7
feet. The maximum equivalent vent length for the exhaust is 60 feet for
3” diameter pipe (50 feet for the 75 gal.) and 100 feet for 4” diameter
pipe (90 feet for the 75 gal.). The intake portion of the vent must be
equal to or less than the vent length of the exhaust. The tables below
are provided for your quick reference, some installations may require a
greater number of elbows. When calculating equivalent vent length,
one 90º elbow is equivalent to 5 feet.
TABLE 1 - VENT CONNECTOR LENGTHS
FOR 3” (7.6 cm) DIAMETER VENT PIPE
Terminating
# of Elbows
(excl. vent
term.)
Maximum straight
Length ft (m)
Minimum
straight
Length
ft (m)
48, 65
gal.
75 gal.
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)
15
Venting continued-
TABLE 2 -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)
48, 65 gal. 75 gal.
Through the Wall
1 95 (29.0) 85 (25.9)
10 (3.1)
Through the Wall
2 90 (27.4) 80 (24.4)
10 (3.1)
Through the Wall
3 85 (25.9) 75 (22.9)
10 (3.1)
Through the Wall
4 80 (24.4) 70 (21.3)
10 (3.1)
Through the Wall
5 75 (22.9) 65 (19.8)
10 (3.1)
Through the Roof
0 100 (30.5) 90 (27.4)
15 (4.6)
Through the Roof
1 95 (29.0) 85 (25.9)
15 (4.6)
Through the Roof
2 90 (27.4) 80 (24.4)
15 (4.6)
Through the Roof
3 85 (25.9) 75 (22.9)
15 (4.6)
Through the Roof
4 80 (24.4) 70 (21.3)
15 (4.6)
NOTE: When using 4” (10.2 cm) vent pipe, use two 4” (10.1 cm) to 3” (7.6
cm) reducers for each portion of the vent. One reducer is installed just
after the blower and the other reducer is used just prior to exiting the
building. 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.
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.
16
Venting continued-
THROUGH THE WALL VENTING: (HORIZONTAL VENTING WITH
STANDARD VENT TERMINALS).
Cut two 3 1/2 in. (8.9 cm) diameter holes 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). The exhaust and intake must not be less than
16” (40.6 cm) apart (see figure 4a). 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.
3” VENT INSTALLATION
4” VENT INSTALLATION
Figure 3
17
Venting continued-
Vent terminal configurations for through the wall venting.
When venting through the wall, the exhaust terminal must exit the structure at a
minimum distance of 16” (40.6 cm) from the intake terminal. The exhaust terminal must
not be located below the intake terminal for any reason (see figure 4a below for
examples of acceptable vent terminal configurations).
Figure 4a
When local conditions present a risk of ice accumulation on the vent terminals, the
configurations in 4b and 4c or the concentric termination are preferred.
The air intake screen can be removed for cold installations but this may make the air
intake susceptible to debris buildup from birds or other animals. If the air intake
screen is removed to prevent freezing, it is recommended that the air inlet screen be
installed during the spring.
Figure 4b
CAUTION
NEVER INSTALL AIR INTAKE ABOVE EXHAUST
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