American Water Heater Ultra Low NOx MODELS Product information sheet

1
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
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.
WARNING: If the information in these
instructions is not followed exactly, a fire
or explosion may result causing property
damage, personal injury or death.
INSTALLER:
• AFFIX THESE INSTRUCTIONS TO OR ADJACENT
TO THE WATER HEATER.
OWNER:
• RETAIN THESE INSTRUCTIONS AND WARRANTY
FOR FUTURE REFERENCE. RETAIN THE ORIGINAL
RECEIPT AS PROOF OF PURCHASE.
Table of Contents ...................................................... 2
325002-000
January 2013
Direct Vent
Residential Gas
Water Heater
To obtain technical, warranty, or service assistance during or after
the installation of this water heater, visit our website at:
http://www.americanwaterheater.com
or call toll free
1-800-999-9515
When calling for assistance, please have the following
information ready:
1. Model number
2. 7 digit product number
3. Serial number
4. Date of installation
5. Place of purchase
Ultra Low NOx MODELS
Installation
Instructions and
Use & Care Guide
LOW LEAD
C
O
NTENT

2
Table Of Contents
Water Heater Safety ..............................................................................1-3
Installing Your Gas Water Heater ........................................................4-16
Unpacking the Water Heater........................................................... 4
Location Requirements................................................................5-6
Gas Supply ..................................................................................7-8
Combustion Air Supply and Ventilation...................................... 8-12
Water System Piping ............................................................... 13-14
Temperature & Pressure Relief Valve........................................... 15
Special Applications...................................................................... 16
Installation Checklist ..................................................................... 17
Operating Your Water Heater ............................................................18-22
Lighting Instructions...................................................................... 18
Operating the Temperature Control System ................................. 21
Operational Conditions ................................................................. 22
Maintenance of Your Water Heater ................................................... 23-27
Troubleshooting Charts .....................................................................27-29
Repair Parts Illustration ..................................................................... 30-31
PAGE
Your safety and the safety of others are very important.
We have provided many important safety messages in this manual and on your appliance. Always read and obey all
safety messages.
This is the safety alert symbol.
This symbol alerts you to potential hazards that can kill or hurt you and others.
All safety messages will follow the safety alert symbol and either the word “DANGER” or
“WARNING.” These words mean:
Indicates an imminently hazardous situation which, if
not avoided, will result in death or injury.
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury, and tell you
what can happen if the instructions are not followed.
Important Instructions
• Do not use this appliance if any part has been under water. Immediately call a qualified person. Water heaters sub-
jected to flood conditions or any time the gas controls, main burner or pilot have been submerged in water require
replacement of the entire water heater.
• Hydrogen gas can be produced in a hot water system that has not been used for a long period of time (generally
two weeks or more). Hydrogen gas is extremely flammable and can ignite when exposed to a spark or flame. To
prevent the possibility of injury under these conditions, we recommend the hot water faucet be opened for several
minutes at the kitchen sink before using any electrical appliance which is connected to the hot water system. If
hydrogen is present, there will probably be an unusual sound such as air escaping through the faucet as water
begins to flow. Do not smoke or have any open flame near the faucet at the time it is open.
The California Safe Drinking Water and Toxic Enforcement Act requires the Governor of California to publish a list of
substances known to the State of California to cause cancer, birth defects, or other reproductive harm, and requires
businesses to warn of potential exposure to such substances.
WARNING: This product contains a chemical known to the State of California to cause cancer, birth defects, or other
reproductive harm.
This product is certiflied to comply with a maximum weighted average of 0.25% lead content as required in some areas.
WATER HEATER SAFETY

3
For all side wall terminated, horizontally vented power vent, direct vent, and power direct vent gas fueled water heaters
installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or
operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished
grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satis-
fied:
INSTALLATION OF CARBON MONOXIDE DETECTORS At the time of installation of the side wall horizontal vented gas
fueled equipment, the installing plumber or gasfitter shall observe that a hard wired carbon monoxide detector with an alarm
and battery back-up is installed on the floor level where the gas equipment is to be installed. In addition, the installing plumber
or gasfitter shall observe that a battery operated or hard wired carbon monoxide detector with an alarm is installed on each
additional level of the dwelling, building or structure served by the sidewall horizontal vented gas fueled equipment. It shall
be the responsibility of the property owner to secure the services of qualified licensed professionals for the installation of hard
wired carbon monoxide detectors.
In the event that the side wall horizontally vented gas fueled equipment is installed in a crawl space or an attic, the hard wired
carbon monoxide detector with alarm and battery back-up may be installed on the next adjacent floor level.
In the event that the requirements of this subdivision can not be met at the time of completion of installation, the owner shall
have a period of thirty (30) days to comply with the above requirements provided that during said thirty (30) day period, a
battery operated carbon monoxide detector with an alarm shall be installed.
APPROVED CARBON MONOXIDE DETECTORS Each carbon monoxide detector as required in accordance with the above
provisions shall comply with NFPA 720 and be ANSI/UL 2034 listed and CSA certified.
SIGNAGE A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum
height of eight (8) feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heat-
ing appliance or equipment. The sign shall read, in print size no less than one-half (1/2) inch in size, “GAS VENT DIRECTLY
BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS.”
INSPECTION The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the
installation unless, upon inspection, the inspector observes carbon monoxide detectors and signage installed in accordance
with the provisions of 248 CMR 5.08(2)(a) 1 through 4.
EXEMPTIONS: The following equipment is exempt from 248 CMR 5.08(2)(a)1 through 4:
1. The equipment listed in Chapter 10 entitled “Equipment Not Required To Be Vented” in the most current edition of NFPA
54 as adopted by the Board; and
2. Product Approved side wall horizontally vented gas fueled equipment installed in a room or structure separate from the
dwelling, building, or structure used in whole or in part for residential purposes.
MANUFACTURERREQUIREMENTS -GAS EQUIPMENTVENTING SYSTEMPROVIDED When the manufacturer of Product
Approved side wall horizontally vented gas equipment provides a venting system design or venting system components with
the equipment, the instructions provided by the manufacturer for installation of the equipment and the venting system shall
include:
1. Detailed instructions for the installation of the venting system design or the venting system components; and
2. A complete parts list for the venting system design or venting system.
MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED When the manufacturer of
a Product Approved side wall horizontally vented gas fueled equipment does not provide the parts for venting the flue gases,
but identifies “special venting systems,” the following requirements shall be satisfied by the manufacturer:
1. The referenced “special venting system” instructions shall be included with the appliance or equipment installation
instructions; and
2. The “special venting systems” shall be Product Approved by the Board, and the instructions for that system shall include a
parts list and detailed installation instructions.
A copy of all installation instructions for all Product Approved side wall horizontally vented gas fueled equipment, all venting
instructions, all parts lists for venting instructions, and/or all venting design instructions shall remain with the appliance or
equipment at the completion of the installation.
INSTALLATION REQUIREMENTS FOR THE COMMONWEALTH OF MASSACHUSETTS

4
INSTALLING YOUR GAS WATER HEATER
Important Information About
This Water Heater
This gas water heater was manufactured to voluntary
safety standards to reduce the likelihood of a flammable
vapor ignition incident. New technology used in meeting
these standards makes this product more sensitive to
installation errors or improper installation environments.
Please review the Installation Checklist found at the end of
the installation instructions section and make any required
installation upgrades or changes.
Consumer Information
This water heater is design-certified by CSA International as
a Category I, direct vented water heater which takes its com-
bustion air from the outside of the structure and exhausts all
products of combustion to the outside of the structure.
This water heater must be installed according to all local
and state codes or, in the absence of local and state codes,
the “National Fuel Gas Code”, ANSI Z223.1(NFPA 54)-
current edition. This is available from the following:
CSA America, Inc.
8501 East Pleasant Valley Road
Cleveland, OH 44131
National Fire Protection Association
1 Batterymarch Park
Quincy, MA 02269
Check your phone listings for the local authorities having
jurisdiction over your installation.
Consumer Responsibilities
This manual has been prepared to acquaint you with the
installation, operation, and maintenance of your gas water
heater and provide important safety information in these
areas.
Read all of the instructions thoroughly before attempting
the installation or operation of this water heater.
Do not discard this manual. You or future users of this
water heater will need it for future reference.
IMPORTANT: The manufacturer and seller of this water
heater will not be liable for any damages, injuries, or
deaths caused by failure to comply with the installation and
operating instructions outlined in this manual.
If you lack the necessary skills required to properly install
this water heater, or you have difficulty following the
instructions, you should not proceed but have a qualified
person perform the installation of this water heater.
Massachusetts code requires this water heater to be
installed in accordance with Massachusetts Plumbing and
Fuel Gas Code 248 CMR Section 2.00 and 5.00.
A data plate identifying your water heater can be found next
to the gas control valve/thermostat. When referring to your
water heater, always have the information listed on the data
plate readily available.
Retain your original receipt as proof of purchase.
Unpacking the Water Heater
WARNING
Excessive Weight Hazard
Use two or more people to move and install
water heater.
Failure to do so can result in back or
other injury.
IMPORTANT: Do not remove any permanent instructions,
labels, or the data label from either the outside of the water
heater or on the inside of water heater panels.
• Remove exterior packaging and place installation com-
ponents aside.
• Inspect all parts for damage prior to installation and
start-up.
• Completely read all instructions before attempting to
assemble and install this product.
• After installation, dispose of/recycle all packaging
materials.

5
Location Requirements
This water heater design has been tested by CSA
International and complies with ANSI Z21.10.1, Section
2.35 Flammable Vapors Resistance. Therefore this water
heater does not need to be installed 18 inches above the
floor unless specifically required by state or local codes.
The water heater must be located or protected to avoid
physical damage by vehicles or flooding.
Do not use or store flammable products such as gasoline,
solvents, or adhesives in the same room or area near the
water heater. If such flammables must be used, all gas
burning appliances in the vicinity must be shut off and their
pilot lights extinguished. Open the doors and windows for
ventilation while flammable substances are in use.
If flammable liquids or vapors have spilled or leaked in the
area of the water heater, leave the area immediately and
call the fire department from a neighbor’s home. Do not
attempt to clean the spill until all ignition sources have been
extinguished.
Keep combustibles such as boxes, magazines, clothes,
etc. away from the water heater area.
FIRE AND EXPLOSION HAZARD
Can result in serious injury or death
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
Storage of or use of gasoline or other
flammable vapors or liquids in the vicinity
of this or any other appliance can result in
serious injury or death.
Flammable Vapors
FLAMMABLES
Read and follow water heater warnings and
instructions.
WARNING
Carbon Monoxide Poisoning Hazard
Do not install in a mobile home.
Doing so can result in death or
carbon monoxide poisoning.
WARNING
Site Location
• Select a location near the center of the water piping
system. The water heater must be installed indoors
and in a vertical position on a level surface. DO NOT
install in bathrooms, bedrooms, or any occupied room
normally kept closed. Note: The water heater may
be installed in a closet with a door off a bedroom or
bathroom providing the units are installed and vented
per the manufacturer’s instructions..
• Consider the vent piping and vent cap termination
location. This is a direct vent water heater and
may be vented through-the-wall. See the “Vent Cap
Termination” section of this manual for the proper vent
cap locations.
• Locate the water heater near the existing gas piping.
If installing a new gas line, locate the water heater to
minimize the pipe length and elbows.
NOTE: This water heater must be installed according to all
local and state codes or, in the absence of local and state
codes, the “National Fuel Gas Code”, ANSI Z223.1(NFPA
54)-current edition.

6
IMPORTANT: The water heater should be located
in an area where leakage of the tank or connections
will not result in damage to the area adjacent to the
water heater or to lower floors of the structure. Due
to the normal corrosive action of the water, the tank
will eventually leak after an extended period of time.
Also any external plumbing leak, including those from
improper installation, may cause early failure of the tank
due to corrosion if not repaired. If the homeowner is
uncomfortable with making the repair a qualified person
should be contacted. A suitable metal drain pan should
be installed under the water heater as shown below,
to help protect the property from damage which may
occur from condensate formation or leaks in the piping
connections or tank. The pan must limit the water level
to a maximum depth of 1-3/4” and be two inches wider
than the heater and piped to an adequate drain.
NOTE: The pan must not restrict combustion air flow.
Locate the water heater near a adequate indoor drain.
The discharge pipe must terminate a maximum of six
inches above a floor drain or external to the building. In
cold climates, it is recommended that the discharge pipe
be terminated at an adequate drain inside the building.
Outside drains are subject to freezing temperatures
which can obstruct the drain line. The piping should be
at least 3/4” ID and pitched for proper drainage. Under
no circumstances will the manufacturer or seller of this
water heater be held liable for any water damage which
is caused by your failure to follow these instructions.
• The water heater should be located in an area not
subject to freezing temperatures. Water heaters located
in unconditioned spaces (i.e., attics, basements,
etc.) may require insulation of the water piping and
drain piping to protect against freezing. The drain and
controls must be easily accessible for operation and
service. Maintain proper clearances as specified on the
data plate.
Clearances and Accessibility
NOTE: Minimum clearances from combustible surfaces are
stated on the data plate adjacent to the gas control valve/
thermostat of the water heater.
The water heater is certified for installation on a
combustible floor.
• IMPORTANT: If installing over carpeting, the carpeting
must be protected by a metal or wood panel beneath
the water heater. The protective panel must extend
beyond the full width and depth of the water heater by
at least three inches (76.2mm) in any direction; or if in
an alcove or closet installation, the entire floor must be
covered by the panel.
• Figure 2 may be used as a reference guide to locate
the specific clearance locations. A minimum of 24
inches of front clearance should be provided for
inspection and service.
State of California
NOTE: The water heater must be braced, anchored, or
strapped to avoid moving during an earthquake. Correct
installation procedure instructions may be obtained from
California’s Office of the State Architect, 1102 Q street,
Suite 5100, Sacramento, CA 95811. Instructions can be
downloaded to your computer at www.dsa.dgs.ca.gov/
Pubs.
METAL
DRAIN
PAN
AT LEAST 2” GREATER THAN THE
DIAMETER OF THE WATER HEATER.
PIPED TO AN
ADEQUATE DRAIN
6” MAXIMUM
AIR GAP
DISCHARGE PIPE
(DO NOT CAP OR PLUG)
VAC
Figure 1
Drain Pan Installation
Back 0” Sides 0”
Sides
0”
Top
View
Front
24” minimum
for service
Vent 0”
Figure 2

7
Gas Supply
Gas Requirements
IMPORTANT: Read the data plate to be sure the water
heater is made for the type of gas you will be using in
your home. This information will be found on the data
plate located near the gas control valve/thermostat. If the
information does not agree with the type of gas available,
do not install or light. Call your dealer.
NOTE: An odorant is added by the gas supplier to the gas
used by this water heater. This odorant may fade over an
extended period of time. Do not depend upon this odorant
as an indication of leaking gas.
Gas Piping
The gas piping must be installed according to all local and state
codes or, in the absence of local and state codes, the “National
Fuel Gas Code”, ANSI Z223.1(NFPA 54)-current edition.
Tables 1 on page 8 provides a sizing reference for commonly
used gas pipe materials. Consult the “National Fuel Gas Code”
for the recommended gas pipe size of other materials.
Refer to Figure 3
NOTE: When installing gas piping, apply approved pipe joint
compound.
1. Install a readily accessible manual shut-off valve in the
gas supply line as recommended by the local utility.
Know the location of this valve and how to turn off the
gas to this unit.
2. Install a drip leg (if not already incorporated as part of
the water heater) as shown. The drip leg must be no
less than three inches long for the accumulation of dirt,
foreign material, and water droplets.
3. Install a ground joint union between the gas control
valve/thermostat and the manual shut-off valve. This
is to allow easy removal of the gas control valve/
thermostat.
4. Turn the gas supply on and check for leaks. Test all
connections by brushing on an approved noncorrosive
leak-detection solution. Bubbles will show a leak.
Correct any leak found.
Gas Pressure
IMPORTANT: The gas supply pressure must not exceed the
maximum supply pressure as stated on the water heater’s data
plate. The minimum supply pressure is for the purpose of input
adjustment.
Gas Pressure Testing
IMPORTANT: This water heater and its gas connection must
be leak tested before placing the appliance in operation.
• If the code requires the gas lines to be tested at a pressure
exceeding 14” W.C., the water heater and its manual shut-
off valve must be disconnected from the gas supply piping
system and the line capped.
• If the gas lines are to be tested at a pressure less than
14” W.C., the water heater must be isolated from the gas
supply piping system by closing its manual shut-off valve
U.L. recognized fuel gas and carbon monoxide (CO) detectors
are recommended in all applications and should be installed
using the manufacturer’s instructions and local codes, rules, or
regulations.
NOTE:Air may be present in the gas lines and could prevent
the pilot from lighting on initial start-up. The gas lines should
be purged of air by a qualified person after installation of the
gas piping system. While purging the gas piping system of air,
make sure that the fuel is not spilled in the area of the water
heater installation, or any source of ignition. If the fuel is spilled
while purging the piping system of air follow the “WHAT TO DO
IF YOU SMELL GAS” instructions on the cover of this manual.
Explosion Hazard
Use a new CSA approved gas supply line.
Install a shut-off valve.
Failure to follow these instructions can
result in death, explosion, or
carbon monoxide poisoning.
WARNING
Do not connect a natural gas water heater to
an L.P. gas supply.
Do not connect an L.P. gas water heater to
a natural gas supply.
Manual Gas
Shut-off Valve
Ground
Joint
Union
Drip Leg
3” Minimum
Check with local
utility for
minimum height
Figure 3
Gas Piping

8
Combustion Air Supply and
Ventilation
IMPORTANT: Air for combustion and ventilation must
not come from a corrosive atmosphere. Any failure due
to corrosive elements in the atmosphere is excluded from
warranty coverage.
IMPORTANT: Do not common vent this water heater with
any power vented appliance.
Vent Pipe System
This is a direct vent water heater which draws its
combustion air from outside of the structure and exhausts
all products of combustion to the outside of the structure.
Carbon Monoxide Hazard
Water heater must be vented to outdoors.
Vent must be installed by a qualified person
using the installation instructions.
Examples of a qualified person include:
gas technicians,
authorized gas company personnel,
and authorized service persons.
Failure to follow these instructions can result
in death or carbon monoxide poisoning.
WARNING Through-the-wall installations require locating the water
heater next to an outside wall. All necessary components
are supplied for the standard through-the-wall installation.
Optional vertical and horizontal extension kits are available
for installations that exceed the standard horizontal and
vertical distances (see table at right). Only one vertical and
one horizontal kit can be used on the same installation.
Through the Wall Flex Pipe Venting
1. Make sure a proper location has been selected for the
water heater installation. Consider the following:
• Water piping
• Gas Piping
• Access for service
• Proper clearance for combustibles
• Drainage for the temperature and pressure
relief valve and drain pan.
• Vent cap termination
2. Determine the “A” dimension for your specific water
heater by referencing figure 4A. Cut a 6 inch opening
through the wall in the location as shown. Determine
the location of electrical wiring, pipes, or wall studs
before cutting.
NOTE: Installations requiring an “A” dimension (vertical
height) greater than what is shown will require the use of a
Optional vertical extension kit (See “Vertical Install Kit” on
Page 11).

9
Optional through the Wall Venting
1. Make sure a proper location has been selected for the
water heater installation. Consider the following:
• Water piping
• Gas Piping
• Access for service
• Proper clearance for combustibles
• Drainage for the temperature and pressure
relief valve and drain pan.
• Vent cap termination
2. Determine the “A” dimension for your specific water
heater by referencing figure 4B. Cut a 6 inch opening
through the wall in the location as shown. Determine
the location of electrical wiring, pipes, or wall studs
before cutting.
NOTE: Installations requiring an “A” dimension (vertical
height) greater than what is shown as standard in the table
will require the use of a vertical extension kit (See “Vertical
Install Kit” on Page 11).
“B”
“A”
NOTE:
1. Dim. “A” measured from center of cutout to bottom of heater.
Maximum height for all water heaters 90”,
Minimum for 40 Gallon water heaters 68”,
Minimum for 50 Gallon water heaters 76”.
2. Dim. “B” measured from center of heater to outside of wall.
Minimum horizontal of 22“ for all water heaters at Maximum height of 90”.
Figure 4A
Installation Flex Vent Pipe
Outer Wall Plate
Small
Clamp
Large Clamp
Inner Wall
Plate
Upper Air Box
Reducer
Vent Cap
Assembly
Large Clamp
Small Clamp
Secure Flex Vent Pipe to Vent
Cap with Small Clamp. Apply
silicone sealant to all connections
making sure all joints are tight
and leak proof.
Secure Flex Vent Pipe to
Reducer with Small Clamp.
Apply silicone sealant to all
connections making sure all
joints are tight and leak proof.
1.
2.
3. Uncompressing the corrugated Flex piping by pulling
the piping to the length as required. Make sure there
are two springs evenly spaced at the bend in the pipe.
4. Determine the “A” and “B” dimensions for the
size of the water heater being installed (Figure 4A).
Dim. “A” is measured from the center of cutout
to the bottom of heater. Maximum height for all
water heaters is 90”. Minimum height for 40
Gallon water heaters 68” and minimum height
for 50 Gallon water heaters is 76” (Figure 4A).
Dim. “B” is measured from the center of water heater
to the outside of the exterior wall. Minimum horizontal
is 22” for all water heaters at the maximum height of
90” (Figure 4A).
5. Cut a 6” opening through the wall in the location as
shown. Note: location is determine first by locating all
electrical wiring, pipes, and wall studs before cutting.
6. Metal hangers may be used to keep the pipe level or
with a slope upward from the water heater through the
wall to Vent Cap.
7. At the water heater: Pull the inner 3” corrugated pipe
to the water heater’s flue reducer and attached using
the Small Clamp included in kit. Apply hi-temp silicone
sealant around the connection making sure joint is tight
and leak proof (Figure 4A).
8. Pull the outer corrugated Flex Vent pipe down covering
the connection and secure using the Large Clamp
included in kit to the collar at the Upper Air Box
(Figure 4A). Apply hi-temp silicone sealant around the
connection making sure joint is tight and leak proof.
9. At the exterior wall: Pull the Flex Vent piping through
the Inner Wall Plate through the clearance hole from
the exterior wall to the Outer Wall Plate. Secure Inner
Wall Plate to the inside wall with 1/2” screws.
10. Pull the outer corrugated Flex Vent pipe out to the
Outer Wall Plate, secure with Large Clamp. Pull the
inner 3” corrugated pipe out from the Flex Vent pipe
through the Outer Wall Plate and attached to the end of
the 3” tube at the Vent Cap and secure using the Small
Clamp included in kit. Apply hi-temp silicone sealant
around the connection making sure the joint is tight and
leak proof (Figure 4A).
11. Secure Vent Cap Assembly to the Outer Wall Plate to
the exterior wall with four 1-1/2” screws provided in kit
(Figure 4A). Note: varying wall structures may require a
different type of screw anchor.
12. Apply hi-temp silicone sealant around the connection
making sure the joint is tight and leak proof (Figure 4A).

10
“B”
“A”
Figure 4B
Optional Installation
NOTE:
1. Dim. “A” measured from center of cutout to bottom of heater.
2. Dim. “B” measured from center of heater to outside of wall.
3” Elbow
Screws
&
Sealant
1
2
5” Pipe
3” Elbow
Inside Cover
Plate
Screws
& Sealant
Figure 5
Vertical Installation
4. Extend the 3” telescoping pipe to its maximum length.
Place the smaller section onto the 3” elbow at least 1
and 1/2 inches (See Figure 6). Drill two holes 180°
apart and secure with the two #8 sheet metal screws
provided. Apply silicone sealant to the joint.
5. Attach the larger section of the 5” telescoping pipe to
the flange on the outer wall plate (See Figure 6). Drill
holes 90° apart with a 1/8” drill bit and fasten with
four #8 sheet metal screws (provided). Apply silicone
sealant to the seam.
6. Extend the 5” telescoping tube to its maximum length.
From outside of the building, insert a 5” tube/outer wall
plate assembly through the opening in the exterior wall
and onto the 5” elbow (See Figure 6). Seat the base of
the outer wall plate onto the exterior wall. Apply silicone
sealant between the plate and the exterior wall.
3” Pipe
Inner Wall
Plate Screws
& Sealant 3” Telescoping
Pipe
Wall
5” Elbow
Inner Wall
Plate
Screws
& Sealant
3” Telescoping
Pipe
5” Telescoping Pipe
Outer Wall Plate
Figure 6:
Vertical Installation
7. Place the 3” tube located in the vent cap into the end
of the 3” telescoping tube (See Figure 7). Drill two
holes 180° apart with a 1/8” drill bit and secure with
two #8 sheet metal screws. Apply sealant to the joint.
Seat the cap against outer wall plate with the word
“HOT” in an upright position.
8. Secure the vent cap/outer wall plate assembly to the
exterior wall with the four 1 and 1/2” screws provided
(See Figure 7). Varying wall structures may require a
different type of screw anchor. To prevent rain from
entering the water heater vent pipe, the 5” tube should
be sloped downward towards the wall 1/4” per foot.
KIT
CAPACITY
40 GALLON 50 GALLON
ABAB
STANDARD 62.75” 18.00” - 24.50” 71.00” 18.00” - 24.50”
HORIZONTAL 62.75” 27.00” - 38.00” 71.00” 27.00” - 38.00”
VERTICAL 62.75” - 89-75” 18.00” - 24.50” 71.00” - 98.00” 18.00” - 24.50”
BOTH 62.75” - 89-75” 27.00” - 38.00” 71.00” - 98.00” 27.00” - 38.00”
3. If you are not using the vertical extension kit, place the
3” elbow on the flue pipe reducer on the air box and
point it in the desired direction (See Figure 8). Press
it firmly downward until seated. Drill 4 holes 90° apart
with a 1/8” drill bit and fasten the four #8 sheet metal
screws provided. Apply silicone sealant to the joint.
Install the 5” elbow over the 3” elbow and seat it into
the collar on the air box. Drill 4 holes 90° apart with a
1/8” drill bit and fasten the four #8 sheet metal screws
provided. Apply silicone sealant to the joint. Place the
inner wall cover plate over the 5” elbow. This plate will
be positioned later.
Table 2

11
Inner Wall
Plate Screws
& Sealant
Outer
Wall
Plate
HOT
Screws
Vent Cap
Screws Sealant
Slope down 1/4”
per foot
Figure 7
Vertical Installation
9. Position and fasten the inner wall plate to the inside
wall using an appropriate fastener for the specific wall
construction. Apply silicone sealant between the inner
wall plate and the inside wall.
10. Make certain the 5” telescoping pipe has been fully
engaged onto the 5 inch elbow. Drill two 1/8” holes
180° apart at the junction of the two joints. Secure
with four #8 sheet metal screws and apply silicone
sealant to the seams. Make sure all the 5” pipe joints
are sealed including the joint to the collar on the water
heater’s air supply box (See Figure 8).
Optional Vertical Extension Kit
Installations requiring dimension “A” to be greater than
62.75” (40 Gallon) or 71.00” (50 Gallon) will require the
use of the optional vertical extension kit. The maximum
height of the “A” dimension cannot exceed 98 inches. If the
“A” dimension for your application is less than 98 inches,
you will have to cut the 3 and 5 inch pipes in the vertical
extension kit to the correct length. For example, if your
applicable “A” distance is 80 inches, then 98 inches - 80
inches = 18 inches. Therefore, you will need to cut 18
inches from both the 3 and 5 inch vertical extension pipes.
DO NOT CUT THE CRIMPED END OF THE 5 INCH PIPE.
After cutting both the pipes to the proper size, place the 3”
vertical extension pipe over the flue pipe reducer on the
upper air box and press it firmly downward until seated.
Using a level, make sure the extension tube is pointing
straight up. Drill 4 holes 90° apart with a 1/8” drill bit and
fasten with four #8 sheet metal screws (provided). Apply
silicone sealant to the seam.
Place the uncrimped end of the 5 inch extension pipe
over the 3 inch extension pipe and seat it onto the collar
on the air box. Making sure the 3 inch extension pipe is
centered in the 5 inch pipe, drill four holes 90° apart with
the 1/8” drill bit and fasten with four #8 sheet metal screws
(provided). Apply silicone sealant to the seam. Place the
flared end of the 3 inch elbow over the 3 inch extension
pipe and press it firmly downward until seated. Drill four
holes 90° apart with the 1/8” drill and fasten with four #8
sheet metal screws (provided). Apply silicone sealant to
the seam.
Install the 5 inch elbow over the 3 inch elbow and seat
it down onto the crimped end of the 5 inch extension
pipe. Temporarily place the 5 inch telescoping pipe onto
the 5 inch elbow and adjust it to give a 1/4 inch per foot
downward slope to the outside wall. Secure the 5 inch
elbow to the extension pipe by drilling four holes 90°
apart with the 1/8” drill and inserting four #8 sheet metal
screws. Apply silicone sealant to the joint. Place the inner
wall cover plate over the 5 inch elbow. This plate will be
positioned later. Proceed to step 4.
Through The Roof Venting*
1. Center the heater directly under the roof opening. This
vent system must be installed vertically only.
2. All the pipes needed to assemble the vent are
included in the kit. Do not add to the length of the
vent system. The total height is limited to 15 feet
on a 50-gallon heater (See Figure 8). The 40-gallon
heater is 8 and1/4” shorter. The total 15-foot height
must stick through the roof a minimum of 2 feet. If
the height needed is less than 15 feet, determine the
height needed and subtract that from 15 feet. That
amount needs to be cut off one of the 3” pipes and 5”
pipes. Cut the non-flared end of the 3” pipe and the
uncrimped end of the 5” pipe.
3. Assemble the kit from the top down starting with the
termination. Attach a 3” pipe using 4 #8 sheet metal
screws 90° apart and seal the joint with sealant. Then
attach the 5” section in the same manor. Drill 1/8”
pilot holes for the screws. Continue until the full length
is assembled. Put the telescoping 5” section on last.
4. Place the heater in position, feed the vent assembly
down through the roof with the flashing in place, and
allow it to rest with the 3” pipe attached to the 3” vent
terminal on the heater. Use screws and sealant to
secure that joint. Extend the 5” telescoping section to
connect to the 5” termination on the heater. Secure
that joint with screws. Seal that joint and the sliding
joint with silicone to make an airtight assembly.
5. Secure the flashing and vent assembly to the roof.
(*Through the Roof Venting Kit available from manufacturer)
Roof Jack Assembly
8 Ft. Min.
15 Ft. Max
Roof Flashing
Secure All
Connection
s with
Screws and
Apply
Silicone
Sealant
2 Ft. Min.
From Any Object
within A 10 Foot
Horizontal Radius
Figure 8
Through the Roof Venting
VAC

12
Vent Cap Termination
The termination of the vent cap must be in accordance
with the local code or the authority having jurisdiction, or
in the absence of such, the National Fuel Gas Code, ANSI
Z223.1, NFPA 54, Current Edition.
Carbon Monoxide Hazard
Follow all instructions to locate and install
vent cap terminal.
Instructions can be found in this manual, in
state and local codes (or the authority
having jurisdiction), or in the absence of
such, the National Fuel Gas Code, ANSI
Z223.1, NFPA 54, Current Edition.
Failure to properly locate and install the
vent terminal can result in death, carbon
monoxide poisoning.
WARNING
18” Min. 18” Min.
24”
Max.
Figure 9
Alcove Installation Minimums
Do not terminate the vent cap in areas containing acid
forming chemicals. Inlet air must not contain any corrosive
elements. Any water heater failure due to corrosive
elements in the atmosphere is excluded from warranty
coverage.
See Figures 7 and 8 for correct Vent Cap Termination
Locations.
A. 12 in (30 cm) min. clearance above grade, veranda, porch, deck,
balcony, or maximum anticipated snow level.
B. 9 in (23 cm) min. clearance on top and side of window or door
that may be opened. Do not install below a window or door that
may be opened.
C. Clearance to permanently closed window.**
D. 12 in (30 cm) min vertical clearance to ventilated soffit.
E. 12 in (30 cm) min. clearance to unventilated soffit.
F. Clearance to outside corner **
U.S. Installation
**Clearance in accordance with local installation codes and the requirements of the gas supplier
G. 12 in (30 cm) min. clearance to inside corner formed by two
exterior walls.
H. 4 ft (122 cm) min. clearance to each side of center line extending
above meter/regulator assembly.
I. 4 ft (122 cm) min. clearance to service regulator vent outlet.
J. 12 in (30 cm) min. clearance to nonmechanical air supply inlet to
building or the combustion air inlet to any other appliance.
K. 3 ft (91 cm) above if within 10 ft (3 m) horizontally of mechanical
air supply inlet.
Figure 10
Vent Cap Termination Locations
The Vent terminal is HOT when the water heater is in
operation. Do not touch the vent terminal or place any
object where contact with the vent terminal may occur. A
protective louvered wall or fence is recommended when
the hot vent cap is low enough to be touched accidentally
(see Figure 5). A Vent guard kit (Kit # 6907245) may
be ordered by contacting the manufacturer of this water
heater at 1-800-999-9515.
• The exhaust outlet must not terminate under a patio,
deck, or any covered area.
• Do not terminate the exhaust outlet near walkways or
into alleys or other publicly accessible areas.
• Do not locate the vent terminal too close to shrubs or
bushes.
• Caulk all cracks, seams, and joints within 6 feet
horizontally above and below the vent.
• Do not terminate the vent within 12 inches of any other
direct vented appliance vent
HOT
Hot Vent Cap
Protective
Louvered
Wall or Fence
3 feet Min.
Figure 11
Protective Louvered Wall or Fence

13
Water System Piping
Piping Installation
Piping, fittings, and valves should be installed according to
the installation drawing (Figure 12). If the indoor installation
area is subject to freezing temperatures, the water piping
must be protected by insulation.
The water supply pressure should not exceed 80 psi. If this
occurs, a pressure reducing valve with a bypass should be
installed in the cold water inlet line. This should be placed
on the supply to the entire house in order to maintain equal
hot and cold water pressures.
IMPORTANT: Heat cannot be applied to the water fittings
on the heater as they may contain nonmetallic parts. If
solder connections are used, solder the pipe to the adapter
before attaching the adapter to the hot and cold water
fittings.
IMPORTANT: Always use a good grade of joint compound
and be certain that all fittings are drawn up tight.
1. Install the water piping and fittings as shown in Figure
13. Connect the cold water supply (3/4” NPT) to the
fitting marked “C”. Connect the hot water supply (3/4”
NPT) to the fitting marked “H”.
IMPORTANT: Some models may contain energy saving
heat traps to prevent the circulation of hot water within the
pipes. Do not remove the inserts within the heat traps.
2. The installation of unions in both the hot and cold water
supply lines is recommended for ease of removing the
water heater for service or replacement.
3. The manufacturer of this water heater recommends
installing a mixing valve or an anti-scald device in the
domestic hot water line as shown in Figure 13. These
valves reduce the point-of-use temperature of the water
by mixing cold and hot water and are readily available
for use.
4. If installing the water heater in a closed water system,
install an expansion tank in the cold water line as
specified under “Closed System/Thermal Expansion”
section.
5. Install a shut-off valve in the cold water inlet line. It
should be located close to the water heater and be
easily accessible. Know the location of this valve and
how to shut off the water to the heater.
6. A temperature and pressure relief valve must be
installed in the opening marked “Temperature and
Pressure (T & P) Relief Valve” on the water heater.
A discharge line must be added to the opening of
the T&P Relief Valve. Follow the instructions under
“Temperature and Pressure Relief Valve” section.
7. After piping has been properly connected to the water
heater, remove the aerator at the nearest hot water
faucet. Open the hot water faucet and allow the tank to
completely fill with water. To purge the lines of any ex-
cess air, keep the hot water faucet open for 3 minutes
after a constant flow of water is obtained. Close the
faucet and check all connections for leaks.
Figure 13
Typical Mixing
Valve Installation
Follow the mixing
valve manufacturer’s
instructions.
Cold
Water
Inlet
Hot
Water
Outlet
Tempered water
to fixtures Mixing valve
(Set to 120°F)
Metal
Drain Pan
1 3/4” depth maximum Floor Drain
Drain line 3/4”
ID minimum
Discharge Pipe
Do Not Cap or Plug
Temperature and
Pressure Relief Valve
In a closed system use a
thermal expansion tank
Cold Water
Supply to Fixtures
Cold Water
Inlet Valve Pressure reducing
valve with bypass
Union
Hot Water
Outlet
Massachussetts:
Install a vacuum relief
in cold water line per
section 19 MGL 142.
Figure 12
Water Piping Installation
Main water supply
6” Maximum
Air Gap
1”minimum

14
Please note the following:
• The system should be installed only with piping that is
suitable for potable (drinkable) water such as copper,
CPVC, or polybutylene. This water heater must not be
installed using iron piping or PVC water piping.
• Use only pumps, valves, or fittings that are compatible
with potable water.
• Use only full flow ball or gate valves. The use of valves
that may cause excessive restriction to water flow is
not recommended.
• Use only 95/5 tin-antimony or other equivalent solder.
Any lead based solder must not be used.
• Piping that has been treated with chromates, boiler
seal, or other chemicals must not be used.
• Chemicals that may contaminate the potable water
supply must not be added to the piping system.
Closed System/Thermal Expansion
Explosion Hazard
If the temperature and pressure relief valve
is dripping or leaking, have a qualified
person replace it.
Examples of a qualified person include:
licensed plumbers, authorized gas company
personnel, and authorized service
personnel.
Do not plug valve.
Do not remove valve.
Failure to follow these instructions can
result in death, or explosion.
WARNING
As water is heated, it expands (thermal expansion). In
a closed system, the volume of water will grow. As the
volume of water grows, there will be a corresponding
increase in water pressure due to thermal expansion.
Thermal expansion can cause premature tank failure
(leakage). This type of failure is not covered under the
limited warranty. Thermal expansion can also cause
intermittent temperature-pressure relief valve operation:
water discharged from the valve due to excessive pressure
build up. The temperature-pressure relief valve is not
intended for the constant relief of thermal expansion. This
condition is not covered under the limited warranty.
A properly-sized thermal expansion tank should be
installed on all closed systems to control the effects of
thermal expansion. Contact a plumbing service agency or
your retail supplier regarding the installation of a thermal
expansion tank.

15
Temperature and Pressure
Relief Valve
For protection against excessive pressures and
temperatures, a temperature and pressure relief valve must
be installed in the opening marked “T & P RELIEF VALVE”
(see Figure 14A). This valve must be design certified by
a nationally recognized testing laboratory that maintains
periodic inspection of the production of listed equipment or
materials as meeting the requirements for Relief Valves and
Automatic Shut-off Devices for Hot Water Supply Systems,
ANSI Z21.22. The function of the temperature and pressure
relief valve is to discharge water in large quantities in the
event of excessive temperature or pressure developing
in the water heater. The valve’s relief pressure must not
exceed the working pressure of the water heater as stated
on the data plate.
IMPORTANT: Only a new temperature and pressure relief
valve should be used with your water heater. Do not use an
old or existing valve as it may be damaged or not adequate
for the working pressure of the new water heater. Do not
place any valve between the relief valve and the tank.
The Temperature & Pressure Relief Valve:
• Must not be in contact with any electrical part.
• Must be connected to an adequate discharge line.
• Must not be rated higher than the working pressure
shown on the data plate of the water heater.
The Discharge Line:
• Must not be smaller than the pipe size of the relief
valve or have any reducing coupling installed in the
discharge line.
• Must not be capped, blocked, plugged or contain any
valve between the relief valve and the end of the dis-
charge line.
• Must terminate a maximum of six inches above a floor
drain or external to the building. In cold climates, it is
recommended that the discharge pipe be terminated at
an adequate drain inside the building.
• Must be capable of withstanding 250°F (121°C) without
distortion.
• Must be installed to allow complete drainage of both
the valve and discharge line.
T&P Relief Valve and Pipe Insulation (Some Models)
1. Locate the temperature and pressure relief valve on
the water heater (also known as a T&P relief valve).
See Figure 14B.
2. Locate the slit running the length of the T&P relief
valve insulation.
3. Spread the slit open and fit the insulation over the T&P
relief valve. See Figure 14B. Apply gentle pressure
to the insulation to ensure that it is fully seated on the
T&P Relief Valve. Once seated, secure the insulation
with duct tape.
IMPORTANT: The insulation or tape should not block
or cover the T&P relief valve drain opening. Also, the
insulation or tape should not block or hinder access to
the manual relief lever (Figure 14B).
4. Locate the hot water (outlet) & cold water (inlet) pipes
to the water heater.
5. Locate the slit running the length of a section of pipe
insulation.
6. Spread the slit open and slip the insulation over the
cold water (inlet) pipe. Apply gentle pressure along the
length of the insulation to ensure that it is fully seated
around the pipe. Also, ensure that the base of the
insulation is flush with the water heater. Once seated,
secure the insulation with duct tape.
7. Repeat steps 5 and 6 for the hot water (outlet) pipe.
8. Add additional sections of pipe insulation as needed.
Figure 14A
Temperature and Pressure
Relief Valve Installation
Discharge Pipe
(Do not cap or plug.)
6" Maximum
Air Gap
Metal Drain Pan
Temperature and
Pressure Relief Valve
Optional location
some models only
Floor
Drain
Drain Line
3/4” ID minimum
Explosion Hazard
If the temperature and pressure relief valve
is dripping or leaking, have a qualified
person replace it.
Examples of a qualified person include:
licensed plumbers, authorized gas company
personnel, and authorized service
personnel.
Do not plug valve.
Do not remove valve.
Failure to follow these instructions can
result in death, or explosion.
WARNING
Figure 14B
T&P Relief Valve Insulation
T&P Relief Valve
T&P Relief Valve
Drain Line
Manual Relief Lever
T&P Relief Valve Insulation

16
Special Applications
Combination Space Heating/Potable
Water System
Some water heater models are equipped with inlet/
outlet tappings for use with space heating applications.
Note: This water heater is suitable for combination water
(potable) heating and space heating and not suitable for
space heating applications only. If this water heater is to be
used to supply both space heating and potable (drinking
water), the instructions listed below must be followed.
• Be sure to follow the manual(s) shipped with the air
handler system.
• This water heater is not to be used as a replacement
for an existing boiler installation.
• Do not use with piping that has been treated with
chromates, boiler seal or other chemicals and do not
add any chemicals to the water heater piping.
• If the space heating system requires water tempera-
tures in excess of 120°F, a mixing valve or an anti-
scald device should be installed per its manufacturer’s
instructions in the domestic (potable) hot water supply
to limit the risk of scald injury.
• Pumps, valves, piping and fittings must be compatible
with potable water.
• A properly installed flow control valve is required to pre-
vent thermosiphoning. Thermosiphoning is the result
of a continuous flow of water through the air handler
circuit during the off cycle. Weeping (blow off) of the
temperature and pressure relief valve (T & P) or higher
than normal water temperatures are the first signs of
thermosiphoning.
• The domestic hot water line from the water heater
should be vertical past any mixing valve or supply line
to the air handler to remove air bubbles from the sys-
tem. Otherwise, these bubbles will be trapped in the air
handler heat exchanger coil, reducing the efficiency.
• Do not connect the water heater to any system or
components previously used with non-potable water
heating appliances when used to supply potable water.
Some jurisdictions may require a backflow preventer
in the incoming cold water line. This may cause the
temperature and pressure relief valve on the water heater
to discharge or weep due to expansion of the heated water.
A diaphragm-type expansion tank suitable for potable
water will normally eliminate this weeping condition. Please
read and follow the manufacturer’s instructions for the
installation of such tanks.
Also see “Water System Piping” section for additional
instructions on the proper installation and operation of this
water heater.
Solar Installation
If this water heater is used as a solar storage heater
or as a backup for the solar system, the water supply
temperatures to the water heater tank may be in excess of
115°F. A mixing valve or other temperature limiting valve
must be installed in the water supply line to limit the supply
temperature to 115°F. The unit must be set to Standard
Mode (See Operating theTemperature Control System
section).
NOTE: Solar water heating systems can often supply water
with temperatures exceeding 180°F and may result in water
heater malfunction.
Hot
Water
Out
Unions
Metal Drain Pan Floor Drain
6" Maximum
Air Gap
Discharge Pipe
Do Not Cap or Plug
To
Air
Handler
Shut-off
Valve
Flow Control
Valve
Pump
Cold Water Inlet
Domestic
Hot Water
Out
Mixing
Valve
Must be vertical to
remove air bubbles
Figure 16
Typical Mixing Valve Installation
Combination Space Heating/Potable
Water Heating System
Out In
Coil
Air
Handler
Massachusetts code does
not allow this type installation.

17
Water Heater Location
Water heater location is important and can affect system
performance. Please check the following:
□Installation area free of corrosive elements and
flammable materials.
□Centrally located with the water piping system.
Located as close to the gas piping and vent pipe
system as possible.
□Located indoors and in a vertical position. Protected
from freezing temperatures.
□Proper clearances from combustible surfaces
maintained and not installed directly on a carpeted
floor.
□Provisions made to protect the area from water
damage. Metal drain pan installed and piped to an
adequate drain.
□Sufficient room to service the water heater. See
“Clearances and Accessibility” section of this
manual.
□Water heater not located near an air moving device.
Combustion Air Supply and Ventilation
□Fresh air supply free of corrosive elements and
flammable vapors.
Vent Pipe System
Check for proper drafting at the water heater draft hood.
Refer to the “Checking the Draft” section of this manual for
the test procedure. If the procedure shows insufficient draft
is present, please check the following.
□Proper location on an outside wall selected for
Through the Wall Venting.
□“A” Dimensions determined per water heater to
determine whether a Vertical Extension kit is
needed.
□Optional Vertical Extension Kit Installed (if
necessary).
□Heater centered directly under the roof opening
for Through the Roof Venting.
□Through the roof venting has a 15 foot maximum
height for the 50 Gallon direct vent water heater
and a maximum of 14’ 3-1/4” for the 40 Gallon
direct vent water heater.
□Vent pipe system installed according to all local
and state codes or, in the absence of local and
state codes, the “National Fuel Gas Code”, ANSI
Z223.1(NFPA 54)-current edition.
Water System Piping
□Temperature and pressure relief valve properly
installed with a discharge line run to an open drain
and protected from freezing.
□All piping properly installed and free of leaks.
□Heater completely filled with water.
□Closed system pressure build-up devices installed.
□Mixing valve (when applicable) installed per
manufacturer’s instructions (see “Water Temperature
Regulation” section).
Gas Supply and Piping
□Gas type is the same as that listed on the water
heater data plate.
□Gas line equipped with shut-off valve, union, and
drip leg.
□Adequate pipe size and approved pipe material.
□An approved noncorrosive leak detection solution
used to check all connections and fittings for possible
gas leaks. Correct any leak found.
TEFLON ®is a registered trademark of E.I. Du Pont De Nemours and Company.
Important Information About This Water Heater
This gas water heater was manufactured to voluntary safety standards to reduce the likelihood of a flammable vapor
ignition incident. The new technology used in meeting these standards makes this product more sensitive to installation
errors. Please review the following checklist and make any required installation upgrades or changes.
Questions? Reference the number on the cover of this manual for service information.
Installation Checklist

18
OPERATING YOUR WATER HEATER
Lighting Instructions
Read and understand these directions thoroughly before
attempting to light or re-light the pilot. Make sure the
viewport is not missing or damaged. (See Figure 23)
Make sure the tank is completely filled with water before
lighting the pilot. Check the data plate near the gas control
valve/thermostat for the correct gas. Do not use this water
heater with any gas other than the one listed on the data
plate. If you have any questions or doubts, consult your gas
supplier or gas utility company.
FOR YOUR SAFETY READ BEFORE LIGHTING
A. This appliancehas apilot which is lighted by a
piezoelectricigniter.When lighting thepilot,follow these
instructions exactly.
B. BEFORE LIGHTINGsmell all around the appliancearea
for gas. Besureto smell next to thefloor becausesome
gas is heavier than air and will settleon the floor.
WHAT TO DO IF YOU SMELL GAS:
Do not try to light any appliance.
Do not touch any electrical switch; do not use any
phonein 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 thefire
department.
C. Useonly your hand to push in or turn thegas control
temperatureknob. Never use tools.If the knob will not
push in or moveby hand,don’t try to repair it,call a
qualified servicetechnician.Forceor attempted repair
may result in afireor explosion.
D. Do not usethis applianceif any part has been under
water.Immediately call aqualified servicetechnician to
inspect the appliance.Water heaters subjected to flood
conditions or anytimethegas controls,main burner or
pilot havebeen submerged in water requirereplacement
of the entire water heater.
E. DO NOT USE THIS APPLIANCE IFTHERE HASBEENAN
IGNITIONOFVAPORS. Immediately call aqualified service
technician to inspect the appliance. Water heaters
subjected to a flammable vapors ignition will show a
discoloration on the air intake grid (bottom of combustion
chamber) and require replacement of the entire water heater.
WARNING: If you do not follow theseinstructions exactly,a fireor explosion
may result causing property damage,personal injury or loss of life.
TO TURN OFF GAS TOAPPLIANCE
1. Turn the gas control/temperature knob counterclockwise to
the"OFF" setting.Thestatuslight will stop blinking and stay on for a
short time after the water heater is turned off.
LIGHTING INSTRUCTIONS
5.
1. STOP!Itisimperativethatyoureadallsafetywarnings
before lighting thepilot.
2. Turnthegas control/temperatureknob counterclockwise
to the "OFF" setting.
3. Wait ten (10) minutes to clear out any gas.
If you then smell gas, STOP! Follow “B” in the safety
information aboveonthislabel. If you do not smell gas,
go to thenextstep.
4. Turn thegas control/temperatureknob clockwise
to “PILOT”.
Igniter
Button
Gas control/
temperature knob
Status light
120° F (48.9° C)
Mark
Index mark
Press the gas control/temperature knob all the way in
and hold it in. The knob should travel in about 1/4 inch
(6.35 mm) if it is set to "PILOT" correctly.
While holding the gas control/temperature knob in,
click the igniter button continuously (about once a
second) for up to 90 seconds or until Status Light
begins to blink.
If the status light turns solid red, release the gas
control/temperature knob and repeat steps 2 through 5
(waiting 10 minutes before attempting to relight the pilot).
6.
If the status light does not start blinking after three lighting
attempts, turn the gas control/temperature knob to "OFF"
and call a qualified service technician or your gas supplier.
When the status light starts blinking, release the gas
control/temperature knob. Set the gas control/ tempera-
ture knob to the desired setting.
If the status light does not start blinking within 90
seconds, repeat steps 2 through 5 up to THREE (3)
times, waiting 10 minutes between lighting attempts.
The circuitry in this advanced gas valve requires that
you wait 10 minutes between lighting attempts.
Thermopile
Pilot
WARNING
Explosion Hazard
Replace viewport if glass is missing
or damaged.
Failure to do so can result in death,
explosion or fire.

19
Burner Flames
Inspect the burner flames through the viewport. Flames
should be very small with a blue haze and small amounts
of yellow or orange at the edges. After several minutes
of operation, the burner screen may glow red. If large
flames are observed at any time, shut-off unit and call a
qualified person.
Water Temperature Stacking
Stacking occurs when a series of short draws of hot water
(3 gallons or less) are taken from the water heater tank.
This causes increased cycling of the burner and can result
in increased water temperatures at the hot water outlet.
This water heater’s temperature control has been designed
to accurately regulate the water temperature. However,
under certain operating conditions, the water temperature
may temporarily exceed the dial setting. Consequently, in
addition to setting the temperature no higher than 120°F,
we recommend the installation of a mixing valve or an anti-
scald device in the hot water supply line or at the point of
use to further reduce the risk of scald injury. These devices
can be obtained from a plumbing service agency or your
retail supplier.
Emergency Shut Down
IMPORTANT: Should overheating occur or the gas supply
fails to shut off, turn off the water heater’s manual gas
control valve and call a qualified person.
Figure 17
Flame Characteristics
Correct flame
soft blue

20
Water Temperature Regulation
The thermostat is adjusted to the pilot position when it
is shipped from the factory. Water temperature can be
regulated by moving the temperature dial to the preferred
setting. The preferred starting point is 120°F at the “HOT”
setting. Align the knob with the desired water temperature
as shown in Figure 18. There is a hot water scald potential
if the thermostat is set too high.
NOTE: Temperatures shown on the gas control valve/
thermostat are approximates. The actual temperature of the
heated water may vary.
IMPORTANT: Adjusting the thermostat past the 120°F bar
on the temperature dial will increase the risk of scald injury.
Hot water can produce first degree burns within:
Table 3:
Water
Temperature °F
Time for 1st
Degree Burn
(Less Severe Burns)
Time for
Permanent Burns
2nd & 3rd Degree
(Most Severe Burns)
110
116
116
122
131
140
149
154
(normal shower temp.)
(pain threshold)
35 minutes
1 minute
5 seconds
2 seconds
1 second
instantaneous
45 minutes
5 minutes
25 seconds
5 seconds
2 seconds
1 seconds
(U.S. Government Memorandum, C.P.S.C., Peter L. Armstrong, Sept. 15,1978)
VAC
Figure 18
Gas Control Valve/Thermostat
Settings Gas Control/Temperature Knob
Status
Light
Igniter
120°F
Mark
NOTE: During low demand periods when hot water is not
being used, a lower thermostat setting will reduce energy
losses and may satisfy your normal hot water needs.
If hot water use is expected to be more than normal, a
higher thermostat setting may be required to meet the
increased demand. When leaving your home for extended
periods (vacations, etc.) turn the temperature dial to the
vacation (VAC) setting. This will maintain the water at low
temperatures with minimum energy losses and prevent the
tank from freezing during cold weather.
Water temperature over 125°F can cause
severe burns instantly or death from scalds.
Children, disabled and elderly are at highest
risk of being scalded.
Feel water before bathing or showering.
Temperature limiting valves are available.
WARNING