238-53250-00A REV 10/19
CONDENSING POWER (DIRECT) 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.
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.
For your family’s comfort, safety and convenience we recommend this
water heater be installed and serviced by a plumbing professional.
2
CONGRATULATIONS!
You have 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/Power 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.
3
TABLE OF CONTENTS
Page
GENERAL INFORMATION ................................................................. 4
INSTALLATION. .................................................................................. 6
Locating the Water Heater ........................................................... 6
Minimum Clearances ................................................................... 8
Venting .......................................................................................... 9
Vent Pipe Preparation and Joining ............................................ 30
Combustion Air Supply ............................................................... 31
Water Connections ....................................................................... 33
Condensate Drain Connection ................................................... 36
Gas Connections .......................................................................... 37
Electrical Connections ................................................................ 38
Wiring Diagram ............................................................................. 39
GENERAL OPERATION...................................................................... 40
Lighting and Shutdown Instructions ......................................... 41
Thermostat Adjustment ............................................................... 42
Burner Flame Check .................................................................... 43
MAINTENANCE ................................................................................... 44
TROUBLESHOOTING ......................................................................... 47
PARTS DIAGRAM ............................................................................... 50
INSTALLATION INSTRUCTIONS FOR POTABLE WATER AND
SPACE HEATING ................................................................................ 51
NOTES ................................................................................................. 52
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 is a category IV water heater.
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, 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.
DANGER
This product contains one or more chemicals known to the State
of California to cause cancer, birth defects, or reproductive harm.
6
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 in. (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.
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.
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 SHOULD 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.
7
Installation (Locating the Water Heater) continued-
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
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.
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!
8
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. Locate
the water heater as close as possible to the vent opening. 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 in. (1.9 cm) in diameter and
pitched for proper drainage.
It is recommended that a minimum clearance of 4 in. (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.
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 in. (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 in. from the sides and rear, 5
in. (12.7 cm) from the front of the jacket, 0 in. from the vent connector and 15 in.
(38.1 cm) from the jacket top. Increase distances to provide clearance for servicing.
WARNING
Failure to adhere to these installation and operation instructions
may create a hazard to life and property and will nullify the warranty.
IMPORTANT
This water heater can be installed as either power direct vent or power vent
(air from inside) system. If it is installed as a direct vent system, then the air
intake and the exhaust vent are piped to the outside. If a power vented system
is used, then air is drawn from inside and only the exhaust is piped to the
outside. Horizontal and vertical venting can be mixed. Determine which system
is best for your application and install as described in the following sections.
9
Venting
The venting instructions must be followed to avoid restricted combustion or
recirculation of flue gases. Such conditions cause sooting or risks of fire and
asphyxiation. This water heater can be installed as either a power direct vent
system or power vent (air from inside) system. If it is installed as a direct vent
system, then the air intake and the exhaust vent are piped to the outside. If a
power vented system is used, then air is drawn from inside and only the
exhaust is piped to the outside. Determine which system is best for your
application and install as described in the following sections.
Power Direct Vent Installation
Venting may be run horizontally through an outside wall or vertically
through a roof through using either 2 in. (5.1 cm), 3 in. (7.7 cm), or 4 in.
(10.2 cm) diameter pipe. This water heater is supplied with a screened
intake elbow and exhaust coupling referred to as the air intake terminal and
the exhaust vent terminal.
Power Vent Installation
Power venting is where the indoor air is used, and the exhaust is vented to the
outside. Venting may be run horizontally through an outside wall or vertically
through a roof through using either 2 in (5.1 cm), 3 in (7.7 cm), or 4 in. (10.2
cm) diameter pipe.
WARNING
The vent system must be properly installed. Failure to properly install the vent system could
result in property damage, personal injury, or death.
DO NOT install damaged venting system components. If damage is evident then contact the
supplier where the water heater was purchased, or the manufacturer listed on the rating
plate for replacement parts.
Use only the vent terminals provided or factory authorized terminals for venting this water
heater.
The water heater requires its own separate venting system. DO NOT connect the exhaust
vent into an existing vent pipe or chimney.
All of the exhaust venting connections must be leak checked with a soap solution upon initial
startup of the water heater. Any leaks must be repaired before continuing operation of the
water heater.
DO NOT terminate the venting where noise from the exhaust or intake will be objectionable.
This includes locations close to or across from windows and doors. Avoid anchoring the
vent and intake pipes directly to framed walls, floors, or ceilings unless rubber isolation pipe
hangers are used. This prevents any vibrations from being transmitted into the living spaces.
DO NOT exceed the venting distances or the number of elbows listed in this manual.
Exceeding the maximum venting distances may cause the water heater to malfunction or
cause an unsafe condition.
DO NOT operate this water heater until the venting installation is complete and the piping
completed. Failure to complete installation before operation can result in property damage,
personal injury, or death.
10
Venting continued-
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
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
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 and covering
non-metallic venting with thermal insulation is prohibited.
11
Venting continued-
This water heater has a certified category IV, per latest ANSI Z 21.10.3-2015.CSA
4.3-2015 revision. Refer to the latest edition of the National Fuel Gas Code (ANSI
Z223.1-latest edition), or in Canada, the Natural Gas and Propane installation Code
(B149.1-00 latest edition).
Power Direct Vent Terminal Location
Plan the vent system layout so that proper clearances are maintained from
plumbing and wiring. Before the vent is installed, determine the vent pipe
termination location as shown in Figure 1a.
Power Vent Terminal Location
Plan the vent system layout so that proper clearances are maintained from
plumbing and wiring. Before the vent is installed, determine the vent pipe
termination location as shown in Figure 1b.
NOTICE
Before beginning installation of any vent pipe, read the vent pipe manufacturer’s
installation instructions.
DO NOT install the water heater in any location where the ambient temperature may
fall below freezing. Water heater must be protected from freezing downdrafts during
shutdown periods.
Provide protection of the building materials from degradation by flue gases from the
exhaust vent terminal.
The vent shall terminate a minimum of 12 in. (30.5 cm) above expected snowfall level
to prevent blockage of vent termination.
The horizontal centerline of the exhaust vent terminal (if applicable) must not be
located lower than the horizontal centerline of the air intake terminal if vented through
the same wall.
A service drain loop must be installed in the drain tubing to serve as a condensate
trap to prevent flue gases from escaping into the room.
DO NOT position the air intake above the exhaust terminal.
NEVER locate the air intake where exhaust gases can be introduced.
12
Venting continued-
Figure 1a – Direct Vent and Powered Direct Vent Terminal Clearances
Canadian Installations
1
US Installations
2
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 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”.
13
Venting continued-
Figure 1b – Vent Terminal Clearances (Other than Direct Vent or Powered Direct Vent
Installations)
Canadian Installations
1
US Installations
2
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
*b
*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”.
14
Venting continued-
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.
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,”
“Minimum Clearances,” and with the National Fuel Gas Code and local codes.
Clearance to combustibles for all venting pipes
and terminals
For installations in the US
0” minimum
For installations in Canada
Refer to vent pipe and terminal
manufacturer’s installation
instructions for clearances to
combustibles.
DO NOT place insulation or other materials in the required clearance spaces
between the venting to combustible material unless otherwise specified.
15
Venting continued-
Venting System Condensation
Condensate formation will occur in the venting of this condensing unit, whether as a
power vent water heater or a power direct 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.
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 in./ft. (.6 cm/.3 m). The vent system
must be supported every 5 ft. (1.5 m) of vertical run and every 5 ft. (1.5 m) of
horizontal run of vent pipe length.
This water heater is a condensing power vented or power direct vented appliance and is
designed to vent its products of combustion through 2 in. (5.1 cm), 3 in. (7.6 cm), or 4 in.
(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 in. (5.1 cm) to 3 in.
(7.6 cm) reducer to connect to the vent outlet when using 3 in. (7.6 cm) vent pipe or 2 in.
(5.1 cm) to 4 in. (10.2 cm) reducer to connect to the vent outlet when using 4 in. (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 in. (5.1 cm) vent
pipe. 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 in. (5.1 cm) vent pipe in Table 1, then
use 3 in. (7.6 cm) vent pipe for the vent connector or 4 in. (10.2 cm) as necessary.
Table 2 lists the venting distances allowed with 3 in. (7.6 cm) diameter vent pipe. When
venting with 3 in. (7.6 cm) vent pipe, use a 3 in. (7.6 cm) to 2 in. (5.1 cm) reducer to exit
through the building wall with 2 in. (5.1 cm) vent pipe. Use the 2 in. (5.1 cm) vent
terminal supplied with the water heater to terminate on the outside of the building. If the
length of 2 in. (5.1 cm) vent pipe needed to go through the wall is greater than 14 in.
(35.5 cm), use 3 in. (7.6 cm) to go through the wall and reduce to 2 in. (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 in. (2.5 cm)
away from the edge of the wall.
Table 3 lists the venting distances allowed with 4 in. (10.2 cm) diameter vent pipe.
When venting with 4 in. (10.2 cm) vent pipe, use a 4 in. (10.2 cm) to 2 in. (5.1 cm)
reducer to exit through the building wall with 2 in. (5.1 cm) vent pipe. Use the 2 in. (5.1
cm) vent terminal supplied with the water heater to terminate on the outside of the
building. If the length of 2 in. (5.1 cm) vent pipe needed to go through the wall is greater
than 14 in. (35.5 cm), use 4 in. (10.2 cm) to go through the wall and reduce to 2 in. (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 in.
(2.5 cm) away from the edge of the wall.
16
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.
17
Venting continued-
Connection to 2 in. (5.1 cm) Connection to a 2 in. (5.1 cm) to
vent pipe 3 in. (7.6 cm) reducer or 4 in.
(10.2 cm) reducer vent pipe
Figure 2 – Vent Connections
NOTE: When connection is made to a 3 in. (7.6 cm) or a 4 in. (10.2 cm) vent pipe,
the reducer must be applied to the 2 in. (5.1 cm) pipe attached to the blower
exhaust as shown.
NOTICE
The air intake and exhaust terminals may be located on separate outside
walls or one terminal may exit the roof while the other is through the wall.
The total combined equivalent vent length must be within the limits specified
in the venting tables and the intake length cannot exceed the exhaust by
more than 30 ft. (9.2 m).
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.
18
Venting continued-
Power Direct Vent
Through The Wall Venting (Horizontal Venting With Standard Vent
Terminals):
Cut two 2 1/2 in. (6.4 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 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 must
be 1 in. (2.5 cm) (see Figure 3). The exhaust and intake must not be less than
16 in. (40.6 cm) apart, and the exhaust terminal must be a minimum of 2 in.
(5.1 cm) higher than the intake terminal (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 ft. (1.5 m)
of horizontal vent.
2” VENT INSTALLATION
3” VENT INSTALLATION
Figure 3 – Vent Installations
19
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 in. (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 Figures 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, then it is recommended that the air inlet screen
be installed during the spring.
Figure 4b
CAUTION
NEVER INSTALL AIR INTAKE ABOVE EXHAUST
20
Venting continued-
Figure 4c
IMPORTANT
When using the vent terminal configuration shown in Figure 4c the
extra elbows must be accounted for in the total vent length see Table 4
or Table 5.
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