Whirlpool Ultra Low Nox Gas Water Heater with the Flame Guard Safety System Use & care guide

Ultra Low Nox
Gas Water Heater
with the Flame Guard™
Safety System
WARNING: If the information in these
instructions is not followed exactly, a fire
or explosion may result causing property
damage, personal injury or death.
Installation
Instructions and
Use & Care Guide
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.
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.
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.
2.
3.
4.
5.
Model number
7 digit product number
Serial number
Date of installation
Place of purchase
Table of Contents ......................................................
LOW LEAD
CONTENT
2
318935-003
June 2012
1
WATER HEATER SAFETY
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 subjected 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 appliance can cause low-level exposure to some of the substances included in the Act.
This product is certifi ed to comply with a maximum weighted average of 0.25% lead content as required in
some areas.
Table Of Contents
PAGE
Water Heater Safety .............................................................................. 1-2
Installing Your Gas Water Heater ........................................................ 3-16
Unpacking the Water Heater........................................................... 3
Location Requirements ................................................................ 4-5
Gas Supply .................................................................................. 6-7
Combustion Air Supply and Ventilation ...................................... 7-11
Water System Piping ............................................................... 12-13
Temperature & Pressure Relief Valve ........................................... 14
Special Applications ...................................................................... 15
Installation Checklist ..................................................................... 16
Operating Your Water Heater ............................................................ 17-21
Lighting Instructions ...................................................................... 17
Operating the Temperature Control System ................................. 20
Operational Conditions ................................................................. 21
Maintenance of Your Water Heater ................................................... 22-27
Troubleshooting Charts ..................................................................... 28-30
Repair Parts Illustration ..................................................................... 31-32
2
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.
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
Consumer Information
Excessive Weight Hazard
Use two or more people to move and install
water heater.
This water heater is design-certified by CSA International
as a Category I, non-direct vented water heater which takes
its combustion air either from the installation area or from
air ducted to the unit from the outside.
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
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 components 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.
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.
Service to the Flame Guard™ Safety System should only
be performed by a qualified person.
Examples of a qualified person include: licensed plumbers,
authorized gas company personnel, and authorized
service personnel.
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
3
WARNING
FLAMMABLES
Flammable Vapors
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.
Read and follow water heater warnings and
instructions.
and require replacement of the entire water heater. Note:
Not following these instructions and/or an inadequate air
supply can cause the Flame Guard™ Safety System to
disable the water heater. Please make required installation
and venting/air supply changes prior to resetting the system
(see “Combustion Air Supply and Ventilation” section).
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.
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.
•
Locate the water heater as close to the chimney or gas
vent as practical. Consider the vent system piping and
combustion air supply requirements when selecting the
water heater location. The venting system must be able
to run from the water heater to termination with minimal
length and elbows.
•
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.
Location Requirements
WARNING
Carbon Monoxide Poisoning Hazard
Do not install in a mobile home.
Doing so can result in death or
carbon monoxide poisoning.
The Flame Guard™ Safety System is designed to reduce
the risk of flammable vapor-related fires. The patented
system protects your family by trapping the burning vapors
within the water heater combustion chamber through
the special flame-trap. The burning vapors literally “burn
themselves out” without escaping back into the room. In the
event of a flammable vapor incident, the Flame Guard™
Safety System disables the water heater by shutting off
the gas supply to the water heater’s burner and pilot,
preventing re-ignition of any remaining flammable vapors
in the area. This will not prevent a possible fire/explosion
if the igniter is depressed and flammable vapors have
accumulated in the combustion chamber with the pilot
light off. If you suspect a flammable vapor incident has
occurred, do not use this appliance. Do not attempt to light
this appliance, or depress the igniter button if you suspect
flammable vapors have accumulated inside or outside the
appliance. Immediately call a qualified person to inspect
the appliance. Water heaters subjected to a flammable
vapors incident will show a discoloration on the flame-trap
4
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.
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 an 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.
Figure 1
Drain Pan Installation
DISCHARGE PIPE
(DO NOT CAP OR PLUG)
METAL
DRAIN
PAN
AT LEAST 2” GREATER THAN THE
DIAMETER OF THE WATER HEATER.
•
•
•
Figure 1A
Air-moving
Devices
Exhaust
Fan
Reverse flow
of gases
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.
Figure 2
Minimum Clearance
Locations
6” MAXIMUM
AIR GAP
Back
Vent
Top
to
ceiling
Sides
PIPED TO AN
ADEQUATE DRAIN
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.
Do not locate the water heater near an air-moving
device. The operation of air-moving devices such as
exhaust fans, ventilation systems, clothes dryers,
fireplaces, etc., can affect the proper operation of
the water heater. Special attention must be given to
conditions these devices may create. Flow reversal of
flue gases may cause an increase of carbon monoxide
inside of the dwelling.
If the water heater is located in an area that is
subjected to lint, dirt, and oil, it may be necessary
to periodically clean the flame-trap (see “External
Inspection & Cleaning of the Flame-trap” section).
Front
24” minimum
for service
Sides
Top
View
State of California
NOTE: For California installation, this water heater must be
braced, anchored, or strapped to avoid falling or 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 also be downloaded to your computer at www.dsa.dgs.ca.gov/Pubs.
5
Gas Supply
Figure 3
Gas Piping
Manual Gas
Shut-off Valve
WARNING
Ground
Joint
Union
Check with local
utility for
minimum height
3” Minimum
Explosion Hazard
Use a new CSA approved gas supply line.
Install a shut-off valve.
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.
Failure to follow these instructions can
result in death, explosion, or
carbon monoxide poisoning.
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.
Table 1 on page 7 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 sediment trap (if not already incorporated
as part of the water heater) as shown. The sediment
trap 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.
6
Sediment Trap
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 shutoff 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.
Combustion Air Supply and
Ventilation
WARNING
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.
Combustion air must be free of acid-forming chemicals
such as sulfur, fluorine, and chlorine. These elements are
found in aerosol sprays, detergents, bleaches, cleaning
solvents, air fresheners, paint, and varnish removers,
refrigerants, and many other commercial and household
products. When burned, vapors from these products form
highly corrosive acid compounds. These products should
not be stored or used near the water heater or air inlet.
Combustion and ventilation air requirements are
determined by the location of the water heater. The water
heater may be located in either an open (unconfined) area
or in a confined area or small enclosure such as a closet or
small room. Confined spaces are areas with less than 50
cubic feet for each 1,000 BTU/HR of the total input for all
gas-using appliances.
Failure to follow these instructions can result
in death or carbon monoxide poisoning.
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.
The following types of installation (not limited to the
following) will require outdoor air for combustion due to
chemical exposure and may reduce but not eliminate the
presence of corrosive chemicals in the air:
•
beauty shops
•
photo processing labs
•
buildings with indoor pools
•
water heaters installed in laundry, hobby, or craft rooms
•
water heaters installed near chemical storage areas
7
Unconfined Space
A water heater in an unconfined space uses indoor air for
combustion and requires at least 50 cubic feet for each
1,000 BTU/HR of the total input for all gas appliances. The
table below shows a few examples of the minimum square
footage (area) required for various BTU/HR inputs.
Table 2
BTU/HR
Input
Minimum Square
Feet with
8' Ceiling
Typical Room
with 8' Ceiling
30,000
188
9 x 21
45,000
281
14 x 20
60,000
375
15 x 25
75,000
469
15 x 31
90,000
563
20 x 28
105,000
657
20 x 33
120,000
750
25 x 30
135,000
844
28 x 30
IMPORTANT:
•
The area must be open and be able to provide the
proper air requirements to the water heater. Areas that
are being used for storage or contain large objects may
not be suitable for water heater installation.
•
Water heaters installed in open spaces in buildings with
unusually tight construction may still require outdoor
air to function properly. In this situation, outside air
openings should be sized the same as for a confined
space.
•
Figure 4
Opening LocationsConfined Spaces
12” maximum
Permanent
openings to
the outside or
additional
rooms within
the building
12” maximum
All Air from Inside the Building
When additional air is to be provided to the confined area
from additional room(s) within the building, the total volume
of the room(s) must be of sufficient size to properly provide
the necessary amount of fresh air to the water heater
and other gas utilization equipment in the area. If you are
unsure that the structure meets this requirement, contact
your local gas utility company or other qualified agency for
a safety inspection.
Each of the two openings shall have a minimum free area
of 1 square inch per 1,000 BTU/HR of the total input rating
of all gas utilization equipment in the confined area, but not
less than 100 square inches (Figure 5).
Confined
Space
Modern home construction usually requires supplying
outside air into the water heater area.
Permanent
Openings
Confined Space
For the correct and proper operation of this water heater,
ample air must be supplied for the combustion, ventilation,
and dilution of flue gases. Small enclosures and confined
areas must have two permanent openings so that sufficient
fresh air can be drawn from outside of the enclosure. One
opening shall be within 12 inches of the top and one within
12 inches of the bottom of the enclosure as shown in
Figure 4.
The size of each opening (free area) is determined by the
total BTU/HR input of all gas utilization equipment (i.e.,
water heaters, furnaces, clothes dryers, etc.) and the
method by which the air is provided. The BTU/HR input can
be found on the water heater data plate. Additional air can
be provided by two methods:
1. All air from inside the building.
2. All air from outdoors.
8
Closet
or
other
confined
space
1 square
inch/1000
BTU/HR
(minimum
100 sq. In.)
Figure 5
All Air from Inside Building
Confined Space Installation
All Air from Outdoors
Outdoor fresh air can be provided to a confined area either
directly or by the use of vertical and horizontal ducts. The
fresh air can be taken from the outdoors or from crawl or
attic spaces that freely communicate with the outdoors.
Attic or crawl spaces cannot be closed and must be
properly ventilated to the outside.
Ductwork must be of the same cross-sectional area as
the free area of the opening to which they connect. The
minimum dimension of rectangular air ducts cannot be less
than three inches.
The size of each of the two openings is determined by the
method in which the air is to be provided. Refer to Table
3 to calculate the minimum free area for each opening.
Figures 6, 7, and 8 are typical examples of each method.
Louvers and Grilles
In calculating free area for ventilation and combustion
air supply openings, consideration must be given to the
blocking effect of protection louvers, grilles, and screens.
These devices can reduce airflow, which in turn may
require larger openings to achieve the required minimum
free area. Screens must not be smaller than 1/4” mesh. If
the free area through a particular design of louver or grille
is known, it should be used in calculating the specified free
area of the opening. If the design and free area are not
known, it can be assumed that most wood louvers will allow
20 - 25% of free area while metal louvers and grilles will
allow 60 - 75% of free area.
Gable vent
to outdoors
Install above
insulation
Confined
Space
Alternate
Air Inlet
1 sq. inch per
4000 BTU/HR
Opening Source
Minimum Free Area
Per Opening (sq. in.)
* Direct to outdoors 1 sq. in, per 4000 BTU/HR
Install above
insulation
Confined
Space
Figure 7
All Air from Outdoors
Through Ventilated Attic
Figure 7
Horizontal ducts
1 sq. in, per 2000 BTU/HR
Figure 8A
Single Opening
1 sq. in, per 3000 BTU/HR
Figure 8B
Example: A water heater with an input rate of 50,000 BTU/HR
using horizontal ducts would require each opening to have a
minimum free area of 25 square inches.
Minimum free area = 50,000 BTU/HR x 1 sq. in. / 2000 BTU/HR =
25 Sq. Inches.
These openings connect directly with the outdoors
through a ventilated attic, a ventilated crawl space, or
through an outside wall.
Consult the local codes of your area for specific ventilation
and combustion air requirements.
12” maximum
1 sq. inch
per
2000 BTU/HR
Figure 6
1 sq. in, per 4000 BTU/HR
Outlet air
to attic
1 Sq. inch per
4000 BTU/HR
Inlet air duct
1 sq. inch per
4000 BTU/HR
Reference
Drawing
Vertical ducts
Open
Foundation
Vent
Gable vent
to outdoors
Keep louvers and grilles clean and free of debris or other
obstructions.
Minimum Free Area of Permanent Openings for Ventilation and
Combustion Air Supply - All Air from Outdoors Only.
Based on the total BTU/HR input rating for all utilizing equipment within the confined space.
Inlet air
from the
crawl
space
Figure 6
All Air from Outdoors; Inlet Air from Ventilated
Crawl Space/Outlet Air to Ventilated Attic
Louvers and grilles must be locked open or interconnected
with the equipment so that they are opened automatically
during equipment operation.
Table 3
Outlet
air to attic
1 Sq. inch per
4000 BTU/HR
Confined
Space
Outlet
Outdoor
Air Ducts
Inlet
*
Figure 8A
All Air from Outdoors
Using Horizontal Ducts
1 sq. Inch
per
2000 BTU/HR
9
Figure 9
Draft hood Installation
Sheet Metal Screws (four provided)
Alternative
Opening
Location
Draft hood
Legs
Legs
Confined
Space
1 sq. Inch
Per 3000 BTU/HR
Slot
Slot
Jacket top
3”- 4” Draft Hood
Combination
Install the draft hood with
the four screws provided.
Sheet Metal Screws (four provided)
Draft hood
Legs
Figure 8B
All Air from Outdoors
Using a Single Permanent Opening
Vent Pipe System
This water heater uses a non-direct, single-pipe vent system
to remove exhaust gases created by the burning of fossil fuels.
Air for combustion is taken from the immediate water heater
location or is ducted in from the outside (see “Combustion Air
Supply and Ventilation” section).
This water heater must be properly vented for the removal of
exhaust gases to the outside atmosphere. Correct installation
of the vent pipe system is mandatory for the proper and
efficient operation of this water heater and is an important
factor in the life of the unit.
The vent pipe 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. The
vent pipe installation must not be obstructed so as to prevent
the removal of exhaust gases to the outside atmosphere.
IMPORTANT: The use of vent dampers is not recommended
by the manufacturer of this water heater. Although some vent
dampers are certified by CSA International, this certification
applies to the vent damper device only and does not mean
they are certified for use on this water heater.
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.
IMPORTANT: If you lack the necessary skills required to
properly install this venting system, you should not proceed,
but get help from a qualified person.
Draft Hood Installation
Align the legs of the draft hood with the slots provided.
Insert the legs and secure the draft hood to the water
heater’s top with the four screws provided as shown in
Figure 9. Do not alter the draft hood in any way. If you are
replacing an existing water heater, be sure to use the new
draft hood supplied with the water heater. IMPORTANT:
50K models must use the supplied 4” draft hood. See
Figure 9.
Vent Pipe Size
It is important that you follow the guidelines in these
instructions for sizing a vent pipe system. If a transition to
a larger vent size is required, the vent transition connection
must be made at the draft hood outlet.
10
Legs
Slot
Jacket top
4” Draft Hood
(50K Models)
Slot
Install the draft hood with
the four screws provided.
Vent Connectors
1. Type B, Double wall, U.L. Listed Vent Pipe.
2. Single wall Vent Pipe.
Maintain the manufacturer’s specified minimum clearance from
combustible materials when using type B double wall vent
pipe.
Vent connectors made of type B, double wall vent pipe
material may pass through walls or partitions constructed
of combustible material if the minimum listed clearance is
maintained.
Maintain a six inch minimum clearance from all combustible
materials when using single wall vent pipe.
IMPORTANT: Single wall vent pipe cannot be used for water
heaters located in attics and may not pass through attic
spaces, crawl spaces or any confined or inaccessible location.
A single wall metal vent connector cannot pass through any
interior wall.
When installing a vent connector, please note the following:
• Install the vent connector avoiding unnecessary bends,
which create resistance to the flow of vent gases.
• Install without dips or sags with an upward slope of at least
1/4-inch per foot.
• Joints must be fastened by sheet metal screws or other
approved means. It must be supported to maintain
clearances and prevent separation of joints and damage.
• The length of the vent connector cannot exceed 75% of
the vertical vent height.
• The vent connector must be accessible for cleaning,
inspection, and replacement.
• Vent connectors cannot pass through any ceiling, floor,
firewall, or fire partition.
• It is recommended (but not mandatory) that a minimum 12
inches of vertical vent pipe be installed on the draft hood
prior to any elbow in the vent system to improve conditions
for positive flow of venting gases.
IMPORTANT: Existing vent systems must be inspected for
obstructions, corrosion, and proper installation.
Chimney Connection
Listed Lined
Chimney
IMPORTANT: Before connecting a vent to a chimney,
make sure the chimney passageway is clear and free of
obstructions. The chimney must be cleaned if previously
used for venting solid fuel appliances or fireplaces. Also
consult local and state codes for proper chimney sizing and
application or, in the absence of local and state codes, the
“National Fuel Gas Code”, ANSI Z223.1(NFPA 54)-current
edition.
•
The connector must be installed above the extreme
bottom of the chimney to prevent potentially blocking
the flue gases.
• The connector must be firmly attached and sealed to
prevent it from falling out.
• To aid in removing the connector, a thimble or slip joint
may be used.
• The connector must not extend beyond the inner edge
of the chimney as it may restrict the space between it
and the opposite wall of the chimney (Figure 10).
Do not terminate the vent connector in a chimney that has
not been certified for this purpose. Some local codes may
prohibit the termination of vent connectors in a masonry
chimney.
2 ft. minimum above any
object within10 ft.
horizontally
3 ft. minimum
*
Support
Strap
Slope up
1/4 in.
per ft.
minimum
3 ft. minimum
2 ft. minimum above any
object within10 ft.
horizontally
Support Strap
*
Vertical Exhaust Gas Vent
Vertical exhaust gas vents must be installed with U.L. listed
type B vent pipe according to the vent manufacturer’s
instructions and the terms of its listing.
It must be connected to the water heater’s draft hood by a
listed vent connector or by directly originating at the draft
hood opening.
Vertical gas vents must terminate with a listed cap or
other roof assembly and be installed according to their
manufacturer’s instructions.
Gas vents must be supported to prevent damage, joint
separation, and maintain clearances to combustible
materials (Figures 11 and 12).
IMPORTANT: This gas vent must be terminated in a
vertical position to facilitate the removal of the burnt gases.
An unused chimney flue or masonry enclosure may be
used as a passageway for the installation of a gas vent
(Figure 12).
Common (combined) venting is allowable with vertical type
B vent systems and lined masonry chimneys as long as
proper draft for the water heater is established under all
conditions of operation.
IMPORTANT: Do not common vent this water heater with
any power vented appliance.
Figures 10-12 are examples of vent pipe system
installations and may or may not be typical for your specific
application. Consult the “National Fuel Gas Code”, NFPA
54, ANSI Z223.1-current edition and the guidelines set forth
by prevailing local codes.
**
Vent
connector
slope up
1/4 in. per ft.
minimum
Figure 12
Venting Through
MAINTAIN MANUFACTURER’S
a Chimney
SPECIFIED MINIMUM CLEARANCE
with Type B
Double Wall
Vent Pipe.
SUPPORT
STRAP
*MAINTAIN
CLEARANCE
VENT
CONNECTOR
SLOPE UP
1/4 IN. PER FT.
MINIMUM
LISTED VENT CAP
**MAINTAIN
SPECIFIED
CLEARANCE
SEAL
VENT CONNECTOR
UNUSED CHIMNEY
FLUE OR MASONRY
ENCLOSURE
Maintain vent pipe clearance requirements to local, state
*and/or
the “National Fuel Gas Code”, ANSI Z223.1(NFPA
54)-current edition.
** NFPA 211, Standard for Chimneys, Fireplaces, Vents,
and Solid Fuel-Burning Appliances states that these
chimneys are intended to be installed in accordance with
the installation instructions provided with each chimney
support assembly. Minimum air space clearance to
combustible materials should be maintained as marked on
the chimney sections.
11
Water System Piping
Piping Installation
Piping, fittings, and valves should be installed according to
the installation drawing (Figure 13). 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.
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 excess 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
Water Piping Installation
In a closed system use a
thermal expansion tank
Cold Water
Supply to Fixtures
Hot Water
Outlet
Main water supply
Cold Water
Inlet Valve
Union
Temperature and
Pressure Relief Valve
Discharge Pipe
Do Not Cap or Plug
Drain line 3/4”
ID minimum
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 14. 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.
12
Pressure reducing
valve with bypass
1”minimum
Metal
Drain Pan
1 3/4” depth maximum
Figure 14
Typical Mixing
Valve Installation
6” Maximum
Air Gap
Massachussetts:
Install a vacuum relief
in cold water line per
section 19 MGL 142.
Floor Drain
Cold
Water
Inlet
Follow the mixing
valve manufacturer’s
instructions.
Hot
Water
Outlet
Tempered water
to fixtures
Mixing valve
(Set to 120°F)
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
WARNING
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.
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.
13
Temperature and Pressure
Relief Valve
WARNING
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.
Figure 15A
Temperature and Pressure
Relief Valve Installation
Optional location
some models only
Temperature and
Pressure Relief Valve
Discharge Pipe
(Do not cap or plug.)
Drain Line
3/4” ID minimum
6" Maximum
Air Gap
Floor
Drain
Metal Drain Pan
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 15A). 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.
14
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 discharge 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 15B.
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 15B. 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, electrical tape or equivalent
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 15B).
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 15B
T&P Relief Valve Insulation
T&P Relief Valve Insulation
Manual Relief Lever
T&P Relief Valve
T&P Relief Valve
Drain Line
Special Applications
Combination Space Heating/Potable
Water System
Some water heater models are equipped with inlet/outlet
tappings 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 domestic 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 temperatures in excess of 120°F, a mixing valve or an antiscald 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 prevent 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 system. 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.
Figure 16
Typical Mixing Valve Installation
Combination Space Heating/Potable
Water Heating System
Must be vertical to
remove air bubbles
Domestic
Hot Water
Cold
Mixing Out
Water
Valve
Inlet
Hot
Water
Out
To
Air
Unions
Handler
Flow Control
Valve
Pump
In
Out
Coil
Discharge P ipe
Do Not Cap o r Plug
Air
Handler
Shut-off
Valve
6" Maximum
Air Gap
Metal Drain Pan
Floor Drain
Massachusetts code
does not allow this
type of installation.
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
120°F. A mixing valve or other temperature limiting valve
must be installed in the water supply line to limit the supply
temperature to 120°F. The unit must be set to Standard
Mode (See Operating the Temperature Control System
section).
NOTE: Solar water heating systems can often supply water
with temperatures exceeding 180°F and may result in water
heater malfunction.
15
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
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.
Is the installed environment dirty (excessive
amounts of lint, dirt, dust, etc.)? If so, the flame
arrestor located on the bottom of the water heater
will need to be cleaned periodically. Refer to the
“Maintenance of your Water Heater” section of this
manual for information on cleaning the flame-trap.
□
□
□
□
□
□
Combustion Air Supply and Ventilation
Check for sufficient combustion air supply. Insufficient air
for the combustion of gas will result in the flame becoming
“lazy”, thereby allowing the burner operating temperature
to decrease. This causes the gas control to shut off the
gas supply. Is the water heater installed in a closet or other
small, enclosed space? If so:
□ Are there openings for make-up air to enter and
exit the room/area?
□ Are the openings of sufficient size? Remember,
if there are other gas-fired or air-consuming
appliances in the same room, you need more
make-up air. Refer to the “Location Requirements”
section of this water heater manual for specific
requirements.
Fresh air not taken from areas that contain negative
pressure producing devices such as exhaust fans,
fireplaces, etc.
□ Is there a furnace/air handler in the same room
space as the water heater? If so, has a return air
duct system been attached that exits the room?
If so, check for leaks on the air duct system. If no
air duct system is present, correct immediately
by contacting a local Heating, Ventilation, AirConditioning & Refrigeration (HVAC-R) authorized
service provider.
□
Fresh air supply free of corrosive elements and
flammable vapors.
Fresh air openings sized correctly with consideration
given to the blocking effect of louvers and grilles.
Ductwork is the same cross-sectional area as the
openings.
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.
□
□
□
□
□
□
□
Draft hood properly installed.
Vent connectors securely fastened with screws and
supported properly to maintain six inch clearance.
Vent connector made of approved material and
sized correctly.
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.
Flue baffle properly positioned in the flue tube.
Check the vent system for restrictions/obstructions
and check the vent termination height. Refer to the
“Air Supply and Ventilation” section of this water
heater manual for specific requirements.
Recheck for sufficient combustion air supply.
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. If such a solution is not available, use a
mixture of dish washing soap and water (one part
soap to 15 parts water) or children’s soap bubble
solution. Bubbles forming indicate a leak. Correct
any leak found.
TEFLON ® is a registered trademark of E.I. Du Pont De Nemours and Company.
16
OPERATING YOUR WATER HEATER
Lighting Instructions
WARNING
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.
Lighting the Pilot:
1. Read and follow the lighting instructions on the water
heater’s label.
2. Turn the Control Knob to Pilot. Press the Knob in fully and
hold it in. (The knob will travel in about 1/4-inch if it is set to
Pilot correctly.)
3. Click the Igniter button continuously for up to 90 seconds
or until the Status Light begins to blink. If the Status Light
does not begin to blink after 90 seconds, STOP. Wait 10
minutes before attempting to relight the Pilot. Repeat these
steps 2-3 times, if necessary
The circuitry in this gas valve requires that you wait 10
minutes between lighting attempts. If the Status Light
blinks, release the Control Knob and turn it to the desired
setting. (“Hot” is approximately 120°F).
Explosion Hazard
Replace viewport if glass is missing
or damaged.
Failure to do so can result in death,
explosion or fire.
the spark.) You do not have to push the Control Knob in to
check the Igniter button. Simply look through the sight glass
while clicking the Igniter button and look for a spark. If you
can’t see a spark when the Igniter button is clicked, check
the wiring connections from the Igniter button and make
sure that they are tight.
2. If you see the Igniter spark, try relighting the pilot by
following the instructions on the water heater’s label.
Ensure that the gas supply is tuned on. There may be air in
the gas line, and several lighting attempts may be needed
to completely fill the line with gas and successfully light the
pilot.
If the Pilot Lights but the Status Light Does Not Blink:
If the Status Light Does Not Blink:
1. If the pilot lights, continue to hold the Control Knob in until
the Status Light blinks. If the pilot is lit and remains lit for
90 seconds and the Status Light still does not blink, the
thermopile connections may be loose, the thermal switch
may need to be reset, or the thermopile may be defective.
1. Wait 10 minutes before another lighting attempt.
2. Remove the outer door.
2. If the Status Light did not blink, repeat the lighting
procedure by following the lighting instructions on the water
heater’s label. Remove the outer door
The Control Knob must be set to Pilot and held in
continuously while clicking the igniter button (about once
per second for up to 90 seconds). To observe the Pilot,
remove the outer door and look through the view port (sight
glass). See Figure 23.
3. Press the reset button on the thermal switch (Figure 23).
4. If switch clicks, it may have tripped. Do not light the Pilot
if flammable vapors are present. Check flame arrestor for
signs of discoloration (which could be caused by flammable
vapors). If the flame arrestor is discolored, do not attempt
to relight the Pilot. Have the water heater inspected by a
qualified service technician.
3. Continue clicking the Igniter button (for up to 90 seconds)
until Pilot lights.
5. Check the wiring connections from the thermopile and the
thermal switch to the gas control valve/thermostat.
Ensure that all wiring connections are tight. See Figure 23.
4. Once the Pilot is lit, continue to hold the Control Knob in
until the Status Light begins to blink.
6. Replace the outer door.
5. Release Control Knob and set Knob to desired temperature
setting. (“Hot” is approximately 120°F.)
6. Replace the outer door.
If the Pilot Does Not Light:
1. Wait 10 minutes before another lighting attempt. If the pilot
does not light, the Igniter may not be sparking or the unit
may not be getting gas (or for a new installation, there may
still be air in the gas line).
Each time you click the igniter button, you should be able
to see the spark by looking through the view port.See
Figure 23. (You may have to darken the room lights to see
7. Wait 10 minutes and try to light the Pilot according to the
instructions on the water heater’s label.
8. While clicking the Igniter button continuously, the Control
Knob must be set to Pilot and held in until the Status Light
blinks. Once the Status Light blinks, release the Control
Knob and set the Knob to the desired temperature setting.
(“Hot” is approximately 120°F.)
17
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING: If you do not follow these instructions exactly, a fire or explosion
may result causing property damage, personal injury or loss of life.
A. This appliance has a pilot which is lighted by a
piezoelectric igniter. When lighting the pilot, follow these
instructions exactly.
B. BEFORE LIGHTING smell all around the appliance area
for gas. Be sure to smell next to the floor because some
gas is heavier than air and will settle on 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
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.
C. Use only your hand to push in or turn the gas control
temperature knob. Never use tools. If the knob will not
push in or move by hand, don’t try to repair it, call a
qualified service technician. Force or attempted repair
may result in a fire or explosion.
D. Do not use this appliance if any part has been under
water. Immediately call a qualified service technician to
inspect the appliance. Water heaters subjected to flood
conditions or anytime the gas controls, main burner or
pilot have been submerged in water require replacement
of the entire water heater.
E. DO NOT USE THIS APPLIANCE IF THERE HAS BEEN AN
IGNITION OF VAPORS. Immediately call a qualified 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.
LIGHTING INSTRUCTIONS
1. STOP! It is imperative that you read all safety warnings
before lighting the pilot.
5.
2. Turn the gas control/temperature knob counterclockwise
to the "OFF" setting.
Gas control/
temperature knob
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.
120° F (48.9° C)
Mark
6. When the status light starts blinking, release the gas
control/temperature knob. Set the gas control/ temperature knob to the desired setting.
Igniter
Button
Status light
Index mark
3. Wait ten (10) minutes to clear out any gas.
If you then smell gas, STOP! Follow “ B” in the safety
information above on this label. If you do not smell gas,
go to the next step.
4. Turn the gas control/temperature knob clockwise
to “ PILOT” .
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.
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).
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.
Thermopile
Pilot
TO TURN OFF GAS TO APPLIANCE
1. Turn the gas control/temperature knob counterclockwise
to
the "OFF" setting. The status light will stop blinking and stay on for a
short time after the water heater is turned off.
18
Checking the Draft
Burner Flames
WARNING
Burn Hazard
Do not touch vent.
Doing so can result in burns.
After successfully lighting the water heater, allow the unit
to operate for 15 minutes and check the drafthood relief
opening for proper draft. Make sure all other appliances
in the area are operating and all doors are closed when
performing the draft
test. Pass a match
Figure 17
Drafthood
flame around the
relief opening of the
Relief
Opening
drafthood. A steady
Match
flame drawn into the
opening indicates
proper draft. If
the flame flutters
or is blown out,
combustion products
are escaping from
the relief opening. If this occurs, do not operate the water
heater until proper adjustments or repairs are made to the
vent pipe system and/or air supply requirements.
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.
Figure 18
Flame Characteristics
Correct flame
soft blue
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.
19
Water Temperature Regulation
WARNING
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.
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 19A. 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.
20
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 4:
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)
Figure 19A
Gas Control Valve/Thermostat
Settings
Gas Control/Temperature Knob
120°F
Status Mark
Light
VAC
Igniter
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.
Operating the Temperature
Control System
Figure 19B: Status Codes
List of status codes are shown
at top of gas control valve/thermostat.
Water Temperature Adjustment
The water temperature setting can be adjusted from 55°F
to 155°F. Turn the Gas Control/Temperature Knob to the
desired setting/temperature.
NOTE: The temperatures indicated are approximates. The
actual temperature of the heated water may vary. Also,
some models are certified for 180°F outlet temperatures.
See the Data Plate on the front of the water heater for the
maximum outlet temperature.
Operating Modes and Settings
•
Condensation
Moisture from the products of combustion condenses on
the tank surface and the outside jacket of the water heater
and forms drops of water which may fall onto the burner or
other hot surfaces. This will produce a “sizzling” or “frying”
noise. NOTE: This condensation is normal and should
not be confused with a leaking tank. Condensation may
increase or decrease at different times of the year.
High efficient energy saver water heaters will produce
larger amounts of condensation on initial start-up or when
a large amount of hot water is being used. NOTE: Do not
confuse this with a “tank leak”. Once the water reaches a
temperature of 120°F and the tank warms up (usually 1-2
hours), the condensation will stop.
VAC
•
Operational Conditions
Standard Mode - The controller adjusts the water
heater to maintain the temperature set by the user.
Vacation Setting - The Vacation Setting (VAC) sets the
controller at approximately 55°F. This setting is
recommended when the water heater is not in use for a
long period of time. This effectively turns the controller
temperature setting down to a temperature that
prevents the water in the water heater from freezing
while still conserving energy.
IMPORTANT: It is always recommended that a suitable
metal drain pan be installed under the water heater
to protect the area from water damage resulting from
normal condensation production, a leaking tank or piping
connections. Refer to “Location Requirements” on page
4. Under no circumstances is the manufacturer to be held
responsible for any water damage in connection with this
water heater.
Water Heater Sounds
During the normal operation of the water heater, sounds or
noises may be heard. These noises are common and may
result from the following:
1. Normal expansion and contraction of metal parts during
periods of heat-up and cool-down.
2. Condensation causes sizzling and popping within the
burner area and should be considered normal.
3. Sediment buildup in the tank bottom will create varying
amounts of noise and may cause premature tank failure. Drain and flush the tank as directed under “Draining and Flushing”.
Status Light Codes
Smoke/Odor
Normal Flashes:
The water heater may give off a small amount of smoke
and odor during the initial start-up of the unit. This is due to
the burning off of oil from metal parts of a new unit and will
disappear after a few minutes of operation.
•
0 Flashes
Indicates Control Off/Pilot Out.
•
1 Flash Indicates Normal Operation.
•
Continuous Light indicates the gas control
valve/thermostat is shutting down.
Safety Shut-off
Diagnostic Flashes: If the water heater is not working, look
for the following diagnostic flashes after lighting the pilot.
This water heater is designed to automatically shut-off in
the event of the following:
2 Flashes
Indicates thermopile voltage is low.
1. The pilot flame is extinguished for any reason.
4 Flashes
Indicates overheat failure.
2. The water temperature exceeds 189°F (87°C).
5 Flashes
Indicates water temperature sensor failure.
3. Excessive contaminants in the combustion chamber.
7 Flashes
Indicates electronic control failure.
8 Flashes
See “Status Light Code Troubleshooting Chart.”
9 Flashes
Indicates chamber temperature sensor circuit
is open or shorted.
10 Flashes Indicates an LDO occurrence was detected in
the combustion chamber (contaminants).
4. The ignition of flammable vapors.
A thermopile is used to determine if a pilot flame is present
and will shut off the gas supply to the main burner and pilot
if the flame is absent. This unit is also equipped with a
combustion chamber temperature sensor that will shut off
21
the gas supply to the burner if poor combustion is sensed
(caused by a blocked vent or insufficient combustion air). If
the gas control valve/thermostat shuts off the gas supply,
check the diagnostic flash code and refer to the “Status
Light Code Troubleshooting Chart.” If necessary, also refer
to the “Troubleshooting Chart.”
IMPORTANT: Correct any issues prior to resetting the gas
control valve/thermostat. Reference the telephone number
on the cover of this manual for service information.
Reset the system by following these steps: 1.) Turn the
temperature adjustment knob to OFF. 2.) Unplug the
thermopile plug from the gas control valve/thermostat.
3.) Wait for about three minutes. 4.) Plug the thermopile
plug back into the gas control valve/thermostat. 5.) Turn
the temperature adjustment knob to PILOT and restart the
water heater as directed in this manual.
A temperature limit switch or ECO (Energy Cut Off) sensor
located in the gas control valve\thermostat is used to shut
off the water heater if the water temperature exceeds
189°F (87°C).
The Diagnostic Status Light will flash a code indicating
an “Overheat Failure” (4 Flashes). See “Operating the
Temperature Control System.” If the ECO has functioned
the gas control valve/thermostat should be replaced by
a qualified person. Contact your local dealer for service
information.
Anode Rod/Water Odor
Each water heater contains at least one anode rod,
which will slowly deplete (due to electrolysis) prolonging
the life of the water heater by protecting the glass-lined
tank from corrosion. Adverse water quality, hotter water
temperatures, high hot water usage, hydronic heating
devices, and water softening methods can increase
the rate of anode rod depletion. Once the anode rod
is depleted, the tank will start to corrode, eventually
developing a leak.
Certain water conditions will cause a reaction between the
anode rod and the water. The most common complaint
associated with the anode rod is a “rotten egg smell”
produced from the presence of hydrogen sulfide gas
dissolved in the water.
IMPORTANT: Do not remove this rod permanently as it will
void any warranties. A special anode rod may be available
if water odor or discoloration occurs.
NOTE: This rod may reduce but not eliminate water odor
problems. The water supply system may require special
filtration equipment from a water conditioning company to
successfully eliminate all water odor problems.
Artificially softened water is exceedingly corrosive because
the process substitutes sodium ions for magnesium and
calcium ions. The use of a water softener may decrease
the life of the water heater tank.
The anode rod should be inspected after a maximum of
three years and annually thereafter until the condition of
the anode rod dictates its replacement.
NOTE: artificially softened water requires the anode rod to
be inspected annually.
The following are typical (but not all) signs of a depleted
anode rod:
•
The majority of the rods diameter is less than 3/8”.
•
Significant sections of the support wire (approx. 1/3 or
more of the anode rod’s length) are visible.
If the anode rod show signs of either or both it should be
replaced. NOTE: Whether re-installing or replacing the
anode rod, check for any leaks and immediately correct if
found.
In replacing the anode:
1. Turn off gas supply to the water heater.
2. Shut off the water supply and open a nearby hot water
faucet to depressurize the water
tank.
3. Drain approximately 5 gallons
of water from tank. (Refer to
“Draining and Flushing” for proper
procedures). Close drain valve.
4. Remove old anode rod.
5. Use Teflon® tape or approved pipe
sealant on threads and install new
anode rod.
6. Turn on water supply and open a
nearby hot water faucet to purge air
from water system.
7. Check for any leaks and
immediately correct any if found.
8. Restart the water heater as directed in this manual.
See the Repair Parts Illustration for anode rod location.
TEFLON ® is a registered trademark of E.I. Du Pont De Nemours and Company.
22
MAINTENANCE OF YOUR WATER HEATER
Draining and Flushing
It is recommended that the tank be drained and flushed
every 6 months to remove sediment which may build up
during operation. The water heater should be drained if
being shut down during freezing temperatures. To drain the
tank, perform the following steps:
Temperature and Pressure
Relief Valve
WARNING
1. Turn off the gas to the water heater at the manual gas
shut-off valve.
2. Open a nearby hot water faucet until the water is no
longer hot.
3. Close the cold water inlet valve.
4. Connect a hose to the drain valve and terminate it to an
adequate drain or external to the building.
5. Open the water heater drain valve and allow all of the
water to drain from the tank. Flush the tank with water
as needed to remove sediment.
6. Close the drain valve, refill the tank, and restart the
heater as directed in this manual.
If the water heater is going to be shut down for an extended
period, the drain valve should be left open.
IMPORTANT: Condensation may occur when refilling the
tank and should not be confused with a tank leak.
Routine Preventative
Maintenance
At least annually, a visual inspection should be made of
the venting and air supply system, piping systems, main
burner, pilot burner, and Flame-trap. Check the water
heater for the following:
•
Obstructions, damage, or deterioration in the venting
system. Make sure the ventilation and combustion air
supplies are not obstructed.
•
Build up of soot and carbon on the main burner and
pilot burner. Check for a soft blue flame.
•
Leaking or damaged water and gas piping.
•
Presence of flammable or corrosive materials in the
installation area.
•
Presence of combustible materials near the water
heater.
•
After servicing this water heater, check to make sure it
is working properly. (See Operating Your Water Heater
section of this manual.)
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.
Manually operate
Figure 21
the temperature
Temperature and Pressure
Relief Valve
and pressure relief
Manual Relief
valve at least once
Valve
a year to make
sure it is working
properly. To prevent
water damage,
the valve must be
properly connected
to a discharge line
Discharge line to drain
which terminates
at an adequate
drain. Standing clear of the outlet (discharged water may
be hot), slowly lift and release the lever handle on the
temperature and pressure relief valve to allow the valve to
operate freely and return to its closed position. If the valve
fails to completely reset and continues to release water,
immediately shut off the manual gas control valve and the
cold water inlet valve and call a qualified person.
IMPORTANT: If you lack the necessary skills required to
properly perform this visual inspection, you should not
proceed, but get help from a qualified person.
23
Replacement Parts
IMPORTANT: The following maintenance procedures are
for the Flame Guard™ Safety System components and
should be performed by a qualified person.
Replacement parts may be ordered through your plumber
or the local distributor. Parts will be shipped at prevailing
prices and billed accordingly. When ordering replacement
parts, always have the following information ready:
6. Grasp the manifold tube and push down slightly to free
the manifold, pilot tube, and thermopile.
7. Carefully remove the burner door assembly from the
burner compartment.
NOTE: Be sure not to damage internal parts.
Figure24A
NaturalGas(LowNox)
Burner Door Assembly
1. model, serial, and product number
2. type of gas
3. item number
4. parts description
See pages 31-32 for a list of available repair parts.
Removing the Burner Door Assembly
1. Turn off the gas to the water heater at the manual
shut-off valve (Figure 3).
2. Before performing any maintenance, it is important to
turn off the gas supply to the
Figure 22
water heater at the manual
Gas Control Valve/
gas shut-off valve. This valve Thermostat
is typically located beside
the water heater. Note the
position of the shut-off valve
in the open/on position, then
Sensor
proceed to turn it off (Figure
Wires
3).
VAC
Igniter
Button
3. Remove the outer door.
4. Remove the two screws
(1/4” nut driver) securing
the burner door assembly
to the combustion chamber
(Figure 23).
Igniter
Lead
Wire
Igniter
Wire
White
Wire
(Right
Side)
Pilot
Tube
Manifold
Tube
Gas Control Valve/
Thermostat
VAC
Pilot Tube
Viewport
Outer Door
Not Shown
Burner Door Screws (2)
24
Figure24B
NaturalGas(LowNox)
Burner Door Assembly
50K Models
Pilot Assembly
Burner
Use brush on this surface.
Temperature Sensor
Wire Connection
Thermopile
Wire
Connections
Piezo Igniter Button
Use brush on this surface.
Red
Wire
(Left
Side)
5. Disconnect the pilot tube
(7/16” wrench), the igniter wire from the igniter lead
wire, and manifold tube (3/4” wrench) at the gas
control valve/thermostat. Disconnect the sensor wires
(lift white lever outward, then gently pull the plug
downward). Also, use needle nose pliers to disconnect
the red (+) and white (-) thermopile wires from the gas
control valve/thermostat. See Figures 22 & 23.
Figure 23
Burner Assembly
Removal
Pilot Assembly
Burner
Manifold Tube
Temperature
Sensor
Burner Door
Manifold Component Block
Natural Gas Burner (Ultra Low Nox)
Check the burner to see if it is dirty or clogged. The burner
may be cleaned with soft paint brush (Figure 24). Do not
use a wire brush or any tool that may damage the burner
screen. Important: Do not use the burner if the burner screen
is damaged. NOTE: Damage may be rips or holes in the
burner screen. Discoloration is normal.
Replacing the Pilot/Thermopile Assembly
1. Remove the burner assembly. See Removing the Burner
Door Assembly Section.
2. Lift the retainer clip straight up from the back of
the manifold component block (using a flat-blade
screwdriver), then remove the manifold component
block from the burner door (Figure 25). IMPORTANT:
Be careful not to bend or alter the position of the pilot
tube. Note the placement/order of the wires in the
manifold component block.
Figure 25
Manifold Component
Block Assembly
Igniter
Wire
Pilot Tube
Thermopile
Connectors
7. Use the screw removed earlier to attach the new pilot/
thermopile assembly to the burner door assembly.
NOTE: Remove the pilot nut included with the new
pilot/thermopile. IMPORTANT: Once the pilot nut is
removed the pilot orifice MUST be kept in the pilot.
8. Connect the pilot tube to the new pilot and tighten the
nut securely. To prevent any bending, use a pair of pliers to steady the pilot bracket. IMPORTANT: Keep the
pilot orifice in the pilot when making the connection.
DO NOT operate the water heater without the pilot orifice installed.
9. Reinstall the manifold component block in the burner
door. (See Figures 25). Be sure that the thermopile
wires are positioned through the top opening of the
manifold component block. The igniter wire should be
positioned through the middle opening and the pilot
tube through the bottom opening.
Retainer
Clip
10. Follow the “Replacing the Burner Door Assembly”
instructions to replace the burner door assembly.
Manifold
Component
Block
Replacing the Pilot/Thermopile
Assembly (50K Models)
1. Remove the burner assembly as directed previously.
Burner Door Opening
3. Turn the burner door assembly over till the pilot/
thermopile assembly is easily accessible.
4. Use a 7/16” wrench to loosen the nut securing the pilot
tube to the pilot (right-hand threads). IMPORTANT:
Be careful not to bend or alter the position of the pilot/
thermopile assembly components during the following
steps. To prevent any bending, use a pair of pliers to
steady the pilot/thermopile assembly bracket.
2. Lift the retainer clip straight up from the back of
the manifold component block (using a flat-blade
screwdriver), then remove the manifold component
block from the burner door assembly (Figure 27).
Figure 27
Manifold Component
Block Assembly (50K Models)
Pilot Tube
Thermopile
Connectors
5. Locate and remove the screw attaching the pilot/
thermopile assembly to the burner and keep it for reuse
later. IMPORTANT: Be careful not to bend or alter the
position of the pilot/thermopile assembly components.
Figure 26
Pilot/Thermopile Assembly
Retainer
Clip
Manifold
Component
Block
Igniter Connector
Pilot
Igniter
Wire
Thermopile
Burner Door Opening
Thermopile
Connectors
Pilot/Thermopile
Assembly
Pilot Tube
(Ferrule Nut
Not Shown)
3. Locate and remove the screw attaching the pilot/
thermopile assembly to the burner and keep it for reuse
later. IMPORTANT: Be careful not to bend or alter the
position of the pilot/thermopile assembly components.
4. Pull the pilot/thermopile assembly from the burner door
assembly. IMPORTANT: Be careful not to bend or alter
the position of the pilot assembly components.
6. Install the new pilot/thermopile assembly by routing the
new igniter wire and new thermopile wire through the
opening in the burner door (See Figure 25).
5. Use the old pilot tube as a guide and bend the new
pilot tube to match the old one. Make only the bends
closest to the pilot before going to the next step.
25
Figure 28
Pilot/Thermopile Assembly
(50K Models)
Igniter
Connector
Thermopile
Connectors
Cleaning the Combustion Chamber and
Flame-trap
Pilot Tube
(Ferrule Nut
Not Shown)
Pilot/Thermopile
Assembly
Thermopile
Pilot
1. Follow procedure outlined in “Removing the Burner
Door Assembly”.
2. Use a vacuum cleaner/shop vac to remove all loose
debris in the combustion chamber (Figure 30A). Use
compressed air to clear any dust or debris that may
have accumulated in the flame-trap.
3. Reassemble following the procedure under “Replacing
the Burner Door Assembly”.
Replacing the Burner Door Assembly
6. Push the new pilot/thermopile assembly connectors
through the opening in the burner door (See Figure 27).
Do not to scrape or nick the wires during installation.
IMPORTANT: DO NOT USE PILOT/THERMOPILES
WITH FIBERGLASS SLEEVES. The replacement kit
does not contain a fiberglass sleeve over the pilot/
thermopile wires.
7. Attach the pilot assembly to the Burner Door Assembly.
8. Position the new thermopile wires through the top
opening of the manifold component block (Figure 27).
Be sure that the igniter wire is positioned through the
middle opening of the manifold component block.
Position the pilot tube through the bottom opening of
the manifold component block.
9. See “Replacing the Burner Door Assembly” section.
NOTE: Use the ferrule nut supplied with the new pilot/
thermopile assembly when connecting the pilot tube to
the gas control valve/thermostat.
External Inspection & Cleaning of the
Flame-trap
Although not likely to occur, if debris collects on the flametrap, use a vacuum, compressed air, or a soft bristle brush
to remove it.
NOTE: If unable to inspect or clean the flame trap from
underneath, follow the “Cleaning the Combustion Chamber
and Flame-trap” section instructions.
Figure 29
Flame-trap visual inspection
Flashlight
Mirror
WARNING
Explosion Hazard
Tighten both burner door screws
securely.
Remove any fiberglass between gasket
and combustion chamber.
Replace viewport if glass is missing or
damaged.
Replace manifold component block if missing
or removed.
Replace door gasket if damaged.
Failure to follow these instructions can
result in death, explosion, or fire.
1. Check the door gasket for damage or imbedded debris
prior to installation.
2. Inspect the viewport for damage and replace as required.
3. Insert the burner assembly into the burner
compartment, making sure that the burner assembly
sits firmly against the burner bracket inside the
combustion chamber (Figure 30B).
IMPORTANT: Do not to scrape or nick the wires during
installation.
4. Inspect the door gasket and make sure there is no
fiberglass insulation between the gasket and the
combustion chamber.
5. Replace the two screws which secure the burner
assembly to the combustion chamber and tighten
securely. There should be no space between the
gasket part of the burner door and combustion
chamber. IMPORTANT: Do not operate the water heater
26
if the door gasket does not create a seal between the
burner door and the combustion chamber.
6. Reconnect the manifold tubing (3/4” wrench), pilot
tubing (7/16” wrench), temperature sensor wires, and
thermopile wires to the gas control valve/thermostat.
(See Figure 22 for the correct position of the thermopile
wires.) Do not cross-thread or apply any thread sealant
to the fittings. NOTE: If installing a new pilot tube
install the provided ferrule nut in the gas control valve/
thermostat at the pilot location, hand tight only. Next,
insert the pilot tube into the ferrule nut until it bottoms
out. Hold the tube in this position. Tighten the ferrule
nut with a 7/16” wrench until the crimp connection seals
to the pilot tube. Continue to tighten until the nut is tight
in the gas control valve/thermostat.
Piezoelectric Igniter System
The piezoelectric igniter system consists of the igniter
button, electrode, and wire. The pilot is ignited by an
electric spark generated when the igniter button is pressed.
(See Figure 31). Use only factory authorized piezoelectric
igniter parts for replacement.
Figure 31
Gas Igniter Assembly
Thermopile
Pilot
VAC
Electrode
7. Reconnect the igniter wire.
8. Turn the main gas supply on and check the gas supply
connections for leaks. Use an approved noncorrosive
leak detection solution. If such a solution is not available,
use a mixture of hand dish washing soap and water (one
part soap to 15 parts water) or childrens’ soap bubble
solution. Bubbles forming indicate a leak. Correct any
leak found.
9. Follow the “Lighting Instructions” on page 17.
10. With the pilot and main burner lit, check the manifold
tube and pilot tube connections for leaks. Correct
any leak found. Use an approved noncorrosive leak
detection solution. IMPORTANT: All leaks must be fixed
immediately.
11. Replace the outer door
Figure 30A
Combustion Chamber
Flame-trap
Wire to Electrode
Igniter Button
Pilot/Thermopile Bracket
(Opposite Side)
Testing the Igniter System
Turn off the gas to the water heater at the manual gas shutoff valve. Watch the electrode tip while activating the igniter.
A visible spark should jump from the electrode. To avoid
shock, do not touch the burner or any metal part on the
pilot or pilot assembly. If no spark is visible, check the wire
connections and make sure the electrode is not broken.
Replace the igniter if defective. Dirt and rust on the pilot or
electrode tip can prevent the igniter spark. Wipe clean with
a damp cloth and dry completely. Rust can be removed
from the electrode tip and metal surfaces by lightly sanding
with an emery cloth or fine grit sandpaper.
Bracket
Door Gasket
Figure 30B
Close-up inside view of the combustion chamber
Bracket
27
Removing and Replacing the Gas
Control Valve/Thermostat
Removing the Gas Control Valve/Thermostat:
1. Turn the gas control/temperature knob to the “OFF”
position (Figure 19A).
2. Turn off the gas at the manual shut-off valve on the gas
supply pipe (Figure 3).
3. Drain the water heater. Refer to the section on “Draining
and Flushing” and follow the procedure.
4. Disconnect the igniter wire from the igniter lead wire.
Disconnect the temperature sensor wire, then use
needle nose pliers to disconnect the red (+) and white
(-) thermopile wires. Disconnect the pilot tube (7/16”
wrench) and manifold tube (3/4” wrench) at the gas
control valve/thermostat (Figure 22). Refer to “Gas
Piping” (Figure 3) and disconnect the ground joint union
in the gas piping. Disconnect the remaining pipe from
the gas control valve/thermostat.
5. To remove the gas control valve/thermostat, thread a 4”
section of gas pipe into the inlet and use it to turn the
gas control valve/thermostat (counterclockwise.) Do not
use a pipe wrench or equivalent to grip body. Damage
may result. Do not insert any sharp objects into the
inlet or outlet connections. Damage to the gas control
valve/thermostat may result.
Gas Control Valve/Thermostat:
To replace the gas control valve/thermostat, reassemble
in reverse order. When replacing the gas control valve/
thermostat, thread a 4” section of gas pipe into the inlet and
use it to turn the gas control valve/thermostat (clockwise.)
DO NOT OVER TIGHTEN, damage may result.
• Be sure to use approved Teflon® tape or pipe joint
compound on the gas piping connections and fitting on
the back of the gas control valve that screws into the
tank.
• Be sure to remove the pilot ferrule nut from the new gas
control valve/thermostat.
• Turn the main gas supply on and check the gas supply
connections for leaks. Use an approved noncorrosive
leak detection solution. If such a solution is not available,
use a mixture of hand dish washing soap and water (one
part soap to 15 parts water) or childrens’ soap bubble
solution. Bubbles forming indicate a leak. Correct any
leak found.
• Be sure tank is completely filled with water before
lighting and activating the water heater. Follow the
“Lighting Instructions” on page 17.
• With the pilot and main burner lit, check the manifold
tube and pilot tube connections for leaks. Correct any
leak found.
• If additional information is required, reference the
number on the cover of this manual for service
information.
TEFLON® is a registered trademark of E.I. Du Pont De Nemours and Company.
Flame Guard™ Safety System Operational Checklist
1. Burner door gasket properly sealed.
2. Viewport not damaged or cracked.
3. Flame-trap free of debris and undamaged.
4. Manifold component block properly installed.
5. No leaks at pilot and manifold connection.
6. Burner door screws securely tightened.
TROUBLESHOOTING CHART
PROBLEM
POSSIBLE CAUSE(S)
CORRECTIVE ACTION
BURNER WILL NOT IGNITE
1.
2.
3.
4.
5.
6.
7.
8.
9.
Pilot not lit
Thermostat set too low
No gas
Dirt in the gas lines
Pilot line clogged
Main burner line clogged
Non-functioning thermopile
Non-functioning thermostat
Heater installed in a confined area
1.
2.
3.
4.
5.
6.
7.
8.
9.
Light pilot
Turn temp. dial to desired temperature
Check with gas utility company
Notify utility-install trap in gas line
Clean, locate source and correct
Clean, locate source and correct
Replace thermopile
Replace thermostat
Provide fresh air ventilation
SMELLY WATER
1.
Sulfides in the water
1.
Replace the anode with a special anode
BURNER FLAME YELLOWLAZY
1.
2.
3.
4.
5.
6.
Insufficient secondary air
Low gas pressure
Flue clogged
Main burner line clogged
Heater installed in a confined area
Obstruction in main burner orifice
1.
2.
3.
4.
5.
6.
Provide ventilation to water heater
Check with gas utility company
Clean, locate source and correct
Clean, locate source and correct
Proper fresh air ventilation
Clean or replace orifice
PILOT WILL NOT LIGHT OR
REMAIN LIT
1.
2.
3.
4.
Non-functioning igniter
Thermopile connection loose
Air in gas line
Proper Lighting Sequence not followed.
Gas Control / Temperature Knob was not
held in for sufficient time.
1.
2.
3.
4.
5.
6.
7.
8.
Low gas pressure
No gas
Dirt in gas lines
Cold drafts
5.
6.
7.
8.
Replace igniter pilot assembly
Seat connector firmly in socket
Bleed the air from the gas line
Do not attempt to relight if the red light is lit
and the pilot flame is not visible through the
view port. Wait until the red light is no longer
lit, then follow lighting instructions on the water
heater.
Check with gas utility company
Check with gas utility company
Notify utility-install dirt trap in gas line
Locate source and correct
28
PROBLEM
POSSIBLE CAUSE(S)
CORRECTIVE ACTION
PILOT WILL NOT LIGHT OR
REMAIN LIT (continued)
9.
10.
11.
12.
ECO switch open
Pilot line or orifice clogged
Non-functioning thermopile
Air for combustion obstructed
9.
10.
11.
12.
Replace gas control valve/thermostat
Clean, locate source and correct
Replace thermopile
See maintenance section for inspection and
cleaning of flame trap
13. Flammable vapors incident, Flame Guard™ 13. Replace water heater, eliminate flammable
function utilized
vapors source. Reference the number on the
cover of this manual for service information.
HIGH OPERATION COSTS
1.
2.
3.
4.
5.
6.
7.
8.
9.
Thermostat set too high
Sediment or lime in tank
Water heater too small for job
Wrong piping connections
Leaking faucets
Gas leaks
Wasted hot water
Long runs of exposed piping
Hot water piping in exposed wall
1.
2.
3.
4.
5.
6.
7.
8.
9.
Set temperature dial to lower setting
Drain/flush-provide water treatment if needed
Install adequate heater
Correct piping-dip tube must be in cold inlet
Repair faucets
Check with utility-repair at once
Advise customer
Insulate piping
Insulate piping
INSUFFICIENT HOT WATER 1.
2.
3.
4.
5.
6.
7.
8.
9.
Thermostat set too low
Sediment or lime in tank
Water heater too small
Wrong piping connections
Leaking faucets
Wasted hot water
Long runs of exposed piping
Hot water piping in outside wall
Low gas pressure
1.
2.
3.
4.
5
6.
7.
8.
9.
Turn temperature dial to desired setting
Drain/flush-provide water treatment if needed
Install adequate heater
Correct piping-dip tube must be in cold inlet
Repair faucets
Advise customer
Insulate piping
Insulate piping
Check with gas utility company
SLOW HOT WATER
RECOVERY
1.
Insufficient secondary air
1.
2.
3.
4.
5.
6.
7.
8.
Flue clogged
Low gas pressure
Improper calibration
Thermostat set too low
Water heater too small
Wrong piping connections
Wasted hot water
2.
3.
4.
5.
6.
7.
8.
Provide ventilation to water heater. Check flue
way, flue baffle, and burner
Clean flue, locate source and correct
Check with gas utility company
Replace thermostat
Turn temperature dial to desired setting
Install adequate heater
Correct piping-dip tube must be in cold inlet
Advise customer
DRIP FROM RELIEF VALVE
1.
2.
3.
Excessive water pressure
Heater stacking
Closed water system
1.
2.
3.
Use a pressure reducing valve and relief valve
Lower the thermostat setting
See “Closed System/Thermal Expansion”
THERMOSTAT FAILS TO
SHUT-OFF
1.
2.
Thermostat not functioning properly
Improper calibration
1.
2.
Replace thermostat
Replace thermostat
COMBUSTION ODORS
1.
Insufficient secondary air
1.
2.
3.
Flue clogged
Heater installed in a confined area
2.
3.
Provide ventilation to water heater. Check flue
way, flue baffle, and burner
Clean, locate source and correct
Provide fresh air ventilation
SMOKING AND CARBON
FORMATION (SOOTING)
1.
Insufficient secondary air
1.
2.
3.
4.
5.
6.
Low gas pressure
Flue clogged
Thermostat not functioning properly
Heater installed in a confined area
Burner flame yellow-lazy
2.
3.
4.
5.
6.
Provide ventilation to water heater. Check flue
way, flue baffle, burner
Check with gas utility company
Clean, locate source and correct
Replace thermostat
Provide fresh air ventilation
See “Burner Flame Yellow-Lazy”
CONDENSATION
1.
Temperature setting too low
1.
Increase the temperature setting
BURNER FLAME FLOATS
AND LIFTS OFF PORTS
1.
2.
3.
4.
Orifice too large
High gas pressure
Flue clogged
Cold drafts
1.
2.
3.
4.
Replace with correct orifice
Check with gas utility company
Clean flue and burner-locate source and correct
Locate source and correct
BURNER FLAME TOO HIGH 1.
Orifice too large
1.
Replace with correct orifice
PILOT FLAME
TOO SMALL
Pilot line or orifice clogged
Low gas pressure
1.
2.
Clean, locate source and correct
Check with gas utility company
1.
2.
29
STATUS LIGHT CODE TROUBLESHOOTING CHART
LED STATUS
PROBLEM
CORRECTIVE ACTION
0 FLASHES (LED NOT LIT)
Pilot light is not lit. Not enough
power (millivolts) to keep it lit.
Follow the lighting instructions on the front of the
water heater and record any diagnostic codes.
See Diagnostic Status Light Code section.
1 FLASH (EVERY 3 SECONDS)
Normal operation.
No corrective action necessary.
2 FLASHES
Insufficient power (millivolts) to the 1.
gas control valve/thermostat.
2.
Check all wiring connections. If problem
persists proceed to step 2.
Replace the thermopile. See “Replacing the
Pilot/Thermopile Assembly.”
4 FLASHES
High water temperature has
activated the over heat sensor.
Replace the gas control valve/thermostat. See
“Removing and Replacing the Gas Control Valve/
Thermostat.”
5 FLASHES
Water temperature sensor failure
Replace the gas control valve/thermostat. See
“Removing and Replacing the Gas Control Valve/
Thermostat.”
7 FLASHES
Gas Control Valve/Thermostat
failure.
Replace the gas control valve/thermostat. See
“Removing and Replacing the Gas Control Valve/
Thermostat.”
8 FLASHES
This condition only appears if the
gas control/temperature knob has
been turned off and the thermopile
continued to produce electric
power. This condition can occur if
the thermopile does not cool down
as quickly as expected when the
unit is shut off. This condition
can also occur if the gas control/
temperature knob has been
turned off and the pilot continues
to operate because the pilot valve
is stuck in the open position.
Make sure that the gas control valve/thermostat
knob is set to OFF. Wait one minute. Remove
the outer door. Look through the sight glass for
a pilot flame. If a pilot flame is observed with the
gas control valve/thermostat knob set to the OFF
position, the pilot valve is stuck open. Turn the
main gas supply OFF. Replace the gas control
valve/thermostat. For instructions, see “Removing
and Replacing the Gas Control Valve/Thermostat.”
Combustion chamber temperature
sensor circuit is open or shorted
1.
Check all connections. If the problem persists,
proceed to step 2.
2.
Replace the temperature sensor.
(Temperature sensor replacement must be
performed by a qualified person.) If the
problem persists, proceed to step 3.
3.
Replace the gas control valve/thermostat. For
instructions, see “Removing and Replacing
the Gas Control Valve/Thermostat.”
1.
Reset the system by following these steps: 1.)
Turn the temperature adjustment knob to OFF.
2.) Unplug the thermopile plug from the gas
control valve/thermostat. 3.) Wait for about
three minutes. 4.) Plug the thermopile plug
back into the gas control valve/ thermostat.
5.) Turn the temperature adjustment knob to
PILOT and restart the water heater as directed
in this manual. If the problem persists, proceed
to step 2.
2.
Follow the procedure outlined in “Cleaning the
Combustion Chamber and Flame-Trap.”
If the problem persists, proceed to step 3.
3.
Shut off the gas supply to the water heater
and contact Technical Assistance. The
telephone number is listed on the cover of this
manual.
9 FLASHES
10 FLASHES
30
LDO occurrence was detected
in the combustion chamber
(contaminants)
If the pilot flame is not observed when the gas
control valve/thermostat knob is set to the OFF
position, wait 10 minutes for the thermopile to cool,
then attempt to relight the pilot by following the
lighting instructions on the water heater’s label.
If this condition returns, replace the gas control
valve/thermostat. See “Removing and Replacing
the Gas Control Valve/Thermostat” for instructions.
PILOT LIGHT TROUBLESHOOTING CHART
Section A: Pilot light will not light (new installation).
Is the manual gas shut-off valve,
located in the supply line to the
water heater, in the on position?
YES
Have you bled all the air
from the pilot tube and
gas supply line?
YES
NO
While repeatedly depressing the igniter
button, push in and hold the gas control/
temperature knob until the pilot is lit and
maintains a stable flame, (status light
will blink) then release the gas control/
temperature knob.
NO
Is the igniter producing a
spark?
Turn the manual gas shut-off valve to
the on position and follow the lighting
instructions on the front of the water heater.
Section C: Pilot light will not remain lit.
Check for insufficient combustion air.
Are the combustion air supply and ventilation openings
of sufficient size? See “Combustion Air Supply and
Ventilation” section in this manual for requirements.
NO
Follow the “Testing the Igniter
System” section in this manual.
Set thermostat to desired temperature.
NO Is there a furnace/air handler in the same room as the water heater?
YES
Remove the burner door
assembly. Are the flame-trap and
burner free from debris due to
excessive lint, dirt, dust or oil?
NO
Refer to the “Maintenance of
your Water Heater” section of this
manual for information on cleaning
the flame-trap and burner.
NO
YES
Is there proper drafting at the
drafthood? See “Checking the
Draft” section in this manual.
YES
Section B: Pilot light repeatedly goes out.
Correct size of
openings to allow
sufficient air.
YES
Does the return air duct for the furnace/
air handler draw its air from a separate
location than the water heater? See the
“Location Requirements” section and
the “Combustion Air Supply” section.
YES
NO
NO
Contact a local Heating,
Ventilation, Air-Conditioning
& Refrigeration authorized
service provider to correct
the combustion air supply/
ventilation issue.
Check the vent
system for restrictions/
obstructions and check
the vent termination
height. Refer to the
“Installation Instructions”
section of this manual for
specific requirements.
Reference the number on the cover of this
manual for service information.
YES
Does the flame-trap
show signs of
discoloration?
NO
Reassemble the heater and attempt to
return the heater to service. Does the
pilot remain lit?
YES
YES
NO
NOTE: If you are still experiencing difficulties after
following the steps in sections A, B, and C, use the
number on the cover of this manual to contact Customer
Service.
Shut-off the gas supply to the water heater at the
manual gas shut-off valve, use the number on the
cover of this manual to contact Customer Service.
Set to desired temperature.
Does the diagnostic status light on the
gas control valve/thermostat give
a two flash error code?
YES
NO
Go to section C.
Refer to the “Replacing the Pilot
Assembly” instructions in the manual.
Reassemble and restore to service.
31
REPAIR PARTS ILLUSTRATION
1B
1A
5B
5A
4
2
When ordering repair parts always give the following
information:
1.
2.
3.
4.
Model, serial, and product number
Type of gas
Item number
Parts description
8
3
6A
Repair Parts List
Item
No.
Parts Description
1A
DRAFT HOOD
1B
DRAFT HOOD (50K Models only)
2
REDUCER RING - SOME MODELS
3
FLUE BAFFLE
4
HEAT TRAP (COLD) - SOME MODELS
5A
HEAT TRAP (HOT) - SOME MODELS
5B
HEAT TRAP/NIPPLE COMBO (HOT)
(50K Models Only)
6A
COLD WATER DIP TUBE
6B
HEAT TRAP/NIPPLE/DIP TUB COMBO (COLD)
(50K Models Only)
7
ANODE ROD
8
TEMPERATURE & PRESSURE RELIEF VALVE
(LOCATED TOP OR SIDE)
9
DRAIN VALVE
10
GAS CONTROL VALVE/THERMOSTAT
10
CONTROL MODULE
11
OUTER DOOR
12A*
10
9
7
11
6B
PILOT/THERMOPILE ASSEMBLY KIT
12B*
PILOT/THERMOPILE ASSEMBLY KIT (50K Models)
13A*
BURNER DOOR ASSEMBLY
(Natural Gas/Low Nox)
13B*
BURNER DOOR ASSEMBLY (50K Models)
(Natural Gas/Low Nox)
14*
MANIFOLD COMPONENT BLOCK
15*
BURNER DOOR GASKET
16*
VIEWPORT ASSEMBLY
Special anode rod (see page 21)
17*
FLEXIBLE MANIFOLD TUBE
18*
TEMPERATURE SENSOR
Temperature and Pressure Relief Valve is required,
but may not be factory installed
19*
THERMOPILE
*Pictured on next page.
32
LEGEND
Unique: Flame Guard™ Safety System parts
Listed Parts Kits and Illustrations
Item 12A: Pilot assembly kit, which contains the pilot, electrode, and thermopile (Natural Gas)
Item 12B: Pilot assembly kit (50K Models), which contains the pilot, electrode, and thermopile (Natural Gas)
Item 13A: Burner Door assembly, which contains the burner, gasket, door, pilot tube, manifold component block with
retainer clip, temperature sensor, and pilot assembly. (Natural Gas/Low Nox)
Item 13B: Burner Door assembly (50K Models), which contains the burner, gasket, door, pilot tube, manifold component
block with retainer clip, temperature sensor, and pilot assembly. (Natural Gas/Low Nox)
Item 14: Contains manifold component block and retainer clip
Item 15: Contains manifold door gasket
Item 16: Contains viewport
Item 17: Contains flexible manifold tube
Item 18: Contains temperature sensor (30K and 40K BTU models only.)
Item 19: Contains thermopile (30K and 40K BTU models use a threaded thermopile, 50K BTU models use a snap in
thermopile.)
Item #12B
Item #12A
13A
14
17
13B
15
16
18
19
33
NOTES
34
NOTES
35
Copyright © 2012 American Water Heater Company. All Rights Reserved. Printed in the U.S.
36