State 301 User Manual
Installation Instructions and Use & Care Guide
O
RESIDENTIAL GAS WATER HEATERS
FVIR
(FLAMMABLE VAPOR IGNITION RESISTANT)
FOR SPACE HEATING AND POTABLE WATER HEATING ONLY.
This water heater complies with ANSI Z21.10.1-current
edition regarding the accidental or unintended ignition of
fl ammable vapors, such as those emitted by gasoline.
GAS WATER HEATER
NOT FOR USE IN MOBILE HOMES.
For Your Safety
AN ODORANT IS ADDED TO THE GAS USED
BY THIS WATER HEATER.
• Safety Instructions
• Installation
• Operation
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.
WARNING: Gas leaks can not always be detected by
smell.
Gas suppliers recommend that you use a gas detector
approved by UL or CSA.
For more information, contact the your gas supplier.
If a gas leak is detected, follow the “WHAT TO DO IF YOU
SMELL GAS” instructions.
• Care and Maintenance
• Troubleshooting
• Parts List
WARNING: If the information in these
instructions is not followed exactly, a fire
or explosion may result causing property
damage, personal injury or death.
— 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.
LOW LEAD
NTENT
C
ALL TECHNICAL AND WARRANTY QUESTIONS: SHOULD BE DIRECTED TO THE LOCAL DEALER FROM WHOM THE WATER HEATER WAS PURCHASED.
IF YOU ARE UNSUCCESSFUL, CONTACT RESIDENTIAL TECHNICAL ASSISTANCE AT 1-800-365-0024 OR WWW.STATEWATERHEATERS.COM.
PRINTED IN THE U.S.A. 1013 PART NO. 320388-003
1
TABLE OF CONTENTS
Water Heater Safety .............................................................................................................................................................................. 1
Safe Installation, Use and Service ...................................................................................................................................................... 3
Safety Precautions ............................................................................................................................................................................ 3-4
Typical Installation ............................................................................................................................................................................... 5
Installing your Gas Water Heater ..................................................................................................................................................... 6-8
Important Information About Your Water Heater ...................................................................................................................... 6
Consumer Information ............................................................................................................................................................. 6
Consumer Responsibilities ...................................................................................................................................................... 6
Unpacking the Water Heater ................................................................................................................................................... 6
Location Requirements ............................................................................................................................................................ 7
Site Location ............................................................................................................................................................................ 7
Clearances and Accessibility ................................................................................................................................................... 8
State of California .................................................................................................................................................................... 8
Gas Supply ....................................................................................................................................................................................... 9-10
Gas Requirements .................................................................................................................................................................... 9
Gas Piping ............................................................................................................................................................................... 9
Gas Pressure ........................................................................................................................................................................... 9
Gas Pressure Testing ............................................................................................................................................................... 9
LP Gas Only ........................................................................................................................................................................... 10
Combustion Air and Ventilation ....................................................................................................................................................11-15
Unconfined Space ...................................................................................................................................................................11
Confined Space ......................................................................................................................................................................11
All Air from Inside the Building ............................................................................................................................................... 12
All Air from Outdoors .............................................................................................................................................................. 12
Louvers and Grilles ........................................................................................................................................................... 12-13
Vent Pipe System .................................................................................................................................................................. 13
Draft Hood Installation ...................................................................................................................................................... 13-14
Vent Pipe Size ....................................................................................................................................................................... 14
Vent Connectors .................................................................................................................................................................... 14
Chimney Connection .............................................................................................................................................................. 14
Vertical Exhaust Gas Vent ................................................................................................................................................ 14-15
Water System Piping ..................................................................................................................................................................... 15-18
Piping Installation .............................................................................................................................................................. 15-16
Closed System/Thermal Expansion ....................................................................................................................................... 16
Temperature & Pressure Relief Valve .................................................................................................................................... 17
T&P Relief Valve and Pipe Installation .................................................................................................................................. 17
Combination Space Heating/Potable Water System ........................................................................................................ 17-18
Solar Installation .................................................................................................................................................................... 18
Important Information About this Water Heater ..............................................................................................................................19
Operating Your Water Heater ....................................................................................................................................................... 20-26
Lighting Instructions .......................................................................................................................................................... 20-21
Checking the Draft ................................................................................................................................................................. 22
Burner Flames ....................................................................................................................................................................... 22
Emergency Shutdown ..........................................................................................................
Operating the Temperature Control System ........................................................................................................................... 23
Operational Conditions ..................................................................................................................................................... 23-24
Draining and Flushing ............................................................................................................................................................. 25
Routine Preventive Maintenance ........................................................................................................................................... 25
Temperature and Pressure Relief Valve ........................................................................................................................... 25-26
Maintenance of Your Water Heater .............................................................................................................................................. 26-29
Replacement Parts ................................................................................................................................................................ 26
Removing the Burner from the Manifold/Burner Assembly ................................................................................................... 26
Replacing the Pilot / Thermopile Assembly ........................................................................................................................... 27
External Inspection & Cleaning of the Base-Ring Filter ........................................................................................................ 28
Cleaning the Combustion Chamber and Flame-arrestor ....................................................................................................... 28
Replacing the Manifold Burner/Assembly ......................................................................................................................... 28-29
Piezoelectric Igniter System .................................................................................................................................................. 29
Testing the Igniter System ..................................................................................................................................................... 29
Removing and Replacing the Gas Control Valve/Thermostat ............................................................................................... 29
FVIR System Operational Checklist ...................................................................................................................................... 30
Troubleshooting Checklist ........................................................................................................................................................... 30-31
Pilot Light Troubleshooting Flowchart ............................................................................................................................................ 32
Status Light and Diagnostic Code Troubleshooting Chart ........................................................................................................ 33-34
Notes .... ............................................................................................................................................................................................... 35
Repair Parts ................................................................................................................................................................................... 36-37
Warranty .......................................................................................................................................................................................... 38-39
Water Temperature Regulation ......................................................................................................................................... 22-23
.................................................. 22
2
SAFE INSTALLATION, USE AND SERVICE
Your safety and the safety of others is extremely important in the installation, use and servicing of this water heater.
Many safety-related messages and instructions have been provided in this manual and on your water heater to warn you and
others of a potential hazard. Read and obey all safety messages and instructions throughout this manual. It is very important
that the meaning of each safety message is understood by you and others who install, use or service this water heater.
This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety
messages that follow this symbol to avoid possible injury or death.
DANGER indicates an imminently hazardous situation which, if not avoided, will
DANGER
WARNING
CAUTION
CAUTION
All safety messages will generally tell you about the type of hazard, what can happen if you do not follow the safety message
and how to avoid the risk of injury.
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.
result in death or injury.
WARNING indicates a potentially hazardous situation which, if not avoided, could
result in death or injury.
CAUTION indicates a potentially hazardous situation which, if not avoided, could
result in minor or moderate injury.
CAUTION used without the safety alert symbol indicates a potentially hazardous
situation which, if not avoided, could result in property damage
IMPORTANT DEFINITIONS
• Qualified Technician: A qualified technician must have ability equivalent to a licensed tradesman in the fields of
plumbing, air supply, venting, and gas supply, including a thorough understanding of the requirements of the National
Fuel Gas Code as it relates to the installation of gas fired water heaters. The qualified technician must also be
familiar with the design features and use of flammable vapor ignition resistant water heaters, and have a thorough
understanding of this instruction manual.
• Service Agency: A service agency also must have ability equivalent to a licensed tradesman in the fields of
plumbing, air supply, venting and gas supply, including a thorough understanding of the requirements of the National
Fuel Gas Code as it relates to the installation of gas fired water heaters. The service agency must also have a
thorough understanding of this instruction manual, and be able to perform repairs strictly in accordance with the
service guidelines provided by the manufacturer.
• Gas Supplier: The Natural Gas or Propane Utility or service who supplies gas for utilization by the gas burning
appliances within this application. The gas supplier typically has responsibility for the inspection and code approval of
gas piping up to and including the Natural Gas meter or Propane storage tank of a building. Many gas suppliers also
offer service and inspection of appliances within the building.
FLAMMABLES
SAFETY PRECAUTIONS
WARNING
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
Flammable Vapors
Read and follow water heater warnings and instructions.
gasoline or other flammable vapors or liquids in the
vicinity of this or any other appliance can result in
serious injury or death.
3
Fire or Explosion Harzard
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
Avoid all ignition sources if you smell Natural or LP gas.
Do not expose water heater control to excessive gas
pressure.
Use only gas shown on rating plate.
Maintain required clearances to combustibles.
Keep ignition sources away from faucets after extended
period of non-use.
Read instruction manual before
installing, using or servicing
water heater.
Fire or Explosion Harzard
Hydrogen gas can be produced in a hot water system after
a period of non-use (generally two or more weeks).
Hydrogen gas is extremely flammable and can ignite.
To return hot water system to service, open a hot water
faucet in kitchen for several minutes before using electrical
appliances.
Do not smoke or have open flame near faucet while it is open.
Leave hot water faucet open until the sound of escaping
air stops.
After extended period of non-use,
purge gases from hot water system.
4
TYPICAL INSTALLATION
GET TO KNOW YOUR WATER HEATER - GAS MODELS
A Vent Pipe
B Draft Hood
C Anode (Not Shown)
D Hot Water Outlet
E Insulation
F Gas Supply Piping
G Manual Gas Shut-off Valve
H Ground Joint Union
I Sediment Trap
* INSTALL IN ACCORDANCE
WITH LOCAL CODES.
* SEDIMENT TRAP AS REQUIRED
BY LOCAL CODES.
TO VENT
TERMINATION ON
ROOF
INSTALL THERMAL EXPANSION
A
TANK IF WATER HEATER IS
CLOSED WATER SYSTEM
J Inner Door
K Outer Door
L Union
M Inlet Water Shut-off Valve
N Cold Water Inlet
O Inlet Dip Tube
P Temperature-Pressure Relief Valve
Q Rating Plate
R Flue Baffle
(S) GAS CONTROL VALVE/
THERMOSTAT
INSTALLED IN A
VAC
S Gas Control Valve/Thermostat
T Drain Valve
U Manifold/Burner Assembly
V Flue
W Metal Drain Pan
X Piezo Igniter
Y Base-Ring Filter
Gas Control/Temperature Knob
120°F
Status
Mark
Light
L
D
R
F
G
H
I
B
E
S
V
U
M
N
VACUUM RELIEF
O
T
VALV E
*INSTALL PER
LOCAL CODES
P
Q
DISCHARGE PIPE
(DO NOT CAP OR PLUG.)
Igniter
Temperatures shown are approximates and may vary.
(U) MANIFOLD/BURNER ASSEMBLY
MAIN BURNER
THERMOPILE
MANIFOLD DOOR
6” MAXIMUM
AIR GAP
PILOT TUBE
IGNITER WIRE
MANIFOLD
TUBE
Y
W
* ALL PIPING MATERIALS TO BE
SUPPLIED BY CUSTOMERS.
J
X
K
FLOOR DRAIN
5
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.
This water heater is suitable for combination water
(potable)heating and space heating and not suitable for
space heating applications only.
Consumer Information
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 Agency
1 Batterymarch Park
Quincy, MA 02269
Check your phone listings for the local authorities having
jurisdiction over your installation.
Consumer Responsibilities
water heater, always have the information listed on the
rating plate readily available. Retain your original receipt
as proof of purchase.
Unpacking the Water Heater
WARNING
Excessive Weight Hazard
Use two or more people to move and install the water heater.
Failure to do so can result in injury (including back 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 FVIR System should only be performed by a
qualified technician.
Examples of a qualified technician 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
technician perform the installation of this water heater.
Massachusetts code requires this water heater to be
installed in accordance with Massachusetts Plumbing and
Fuel Gas Code 248 CMR Section 2.00 and 5.00.
A rating plate identifying your water heater can be found
on the front of your water heater. When referring to your
6
Location Requirements
WARNING
Carbon Monoxide Poisoning Hazard
Do not install in a mobile home.
Doing so can result in carbon monoxide poisoning and death.
The FVIR 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-arrestor. The burning vapors literally “burn
themselves out” without escaping back into the room.
In the event of a flammable vapor incident, the FVIR
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 technician to inspect the
appliance. Water heaters subjected to a flammable vapors
incident will show a discoloration on the flame-arrestor and
require replacement of the entire water heater.
WARNING
FLAMMABLES
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
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.
Flammable Vapors
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.
WARNING
Fire or Explosion Hazard
• Read instruction manual before installing, using or
servicing water heater.
• Improper use may result in fire or explosion.
• Maintain required clearances to combustibles.
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.
• 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 rating 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 (Figure 1B).
• If the water heater is located in an area that is
subjected to lint and dirt, at least once annually, clean
the base-ring filter and flame-arrestor. Refer to the
“Maintenance of your Water Heater” section.
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.
7
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
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 technician
should be contacted. A suitable metal drain pan should be
installed under the water heater as shown below, to help
protect the property from damage which may occur from
condensate formation or leaks in the piping connections
or tank. The pan must limit the water level to a maximum
depth of 1-3/4” and be two inches wider than the heater
and piped to an adequate drain. NOTE: The pan must not
restrict combustion air flow. Locate the water heater near a
suitable indoor drain. 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.
METAL
DRAIN
PAN
AT LEAST 2” GREATER THAN THE
DIAMETER OF THE WATER HEATER.
FIGURE 1A.
PIPED TO AN
ADEQUATE DRAIN
Water heater life depends upon water quality, water usage,
water temperature and the environment in which the
water heater is installed. Water heaters are sometimes
installed in locations where leakage may result in property
damage, even with the use of a drain pan piped to a
drain. However, unanticipated damage can be reduced
or prevented by a leak detector or water shut-off device
used in conjunction with a piped drain pan. These devices
are available from some plumbing supply wholesalers and
retailers, and detect and react to leakage in various ways:
• Sensors mounted in the drain pan that trigger an alarm
or turn off the incoming water to the water heater when
water is detected.
• Sensors mounted in the drain pan that turn off the
water supply to the entire home when water is detected
in the drain pan.
• Water supply shut-off devices that activate based on
the water pressure differential between the cold water
and hot water pipes connected to the water heater.
• Devices that will turn off the gas supply to a gas water
heater while at the same time shutting off its water
supply.
EXHAUST FAN
REVERSE FLOW
OF GASES
FIGURE 1B.
Clearances and Accessibility
NOTE: Minimum clearances from combustible surfaces are
stated on the rating 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.
VENT
TOP
TO
CEILING
SIDES
BACK
TOP
VIEW
SIDES
FRONT
24” MINIMUM
FOR SERVICE
FIGURE 2.
State of California
NOTE: The water heater must be braced, anchored, or
strapped to avoid moving during an earthquake. Contact
local utilities for code requirements in your area, or
California Offi ce of the State Architect, 1102 Q Street, Suite 5100,
Sacramento, CA 95814. Instructions can also be downloaded to your
computer at www.dsa.dgs.ca.gov.
8
WARNING
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.
Manual Gas
Shut-off Valve
Ground
Joint
Union
Check with local
utility for
minimum height
3” Minimum
Sediment Trap
FIGURE 3.
6” Maximum
Air Gap
Gas Pressure
Gas Requirements
IMPORTANT: Read the rating 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 rating
plate located near the gas control valve/thermostat. If the
information does not agree with the type of gas available,
do not install or light. Call your dealer.
NOTE: An odorant is added by the gas supplier to the gas
used by this water heater. This odorant may fade over an
extended period of time. Do not depend upon this odorant
as an indication of leaking gas.
Gas Piping
The gas piping must be installed according to all local and
state codes or, in the absence of local and state codes, the
“National Fuel Gas Code”, ANSI Z223.1(NFPA 54)-current
edition.
Tables 1 and 2 on the following page provide a sizing
reference for commonly used gas pipe materials. Consult
the “National Fuel Gas Code” for the recommended gas
pipe size of other materials.
NOTE: Use pipe joint compound or teflon tape marked as
being resistant to the action of petroleum [Propane (L.P.)]
gases (See Figure 3.)
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.
WARNING
Explosion Hazard
• Gas leaks can not always be detected by smell.
• Gas suppliers recommend that you use a gas
detector approved by UL or CSA.
• For more information, contact your gas supplier.
• If a gas leak is detected, follow the “What to do if you
smell gas” instructions on the cover of this manual.
IMPORTANT: The gas supply pressure must not exceed the
maximum supply pressure as stated on the water heater’s rating
plate. The minimum supply pressure is for the purpose of input
adjustment.
Gas Pressure Testing
IMPORTANT: This water heater and its gas connection must
be leak tested before placing the appliance in operation.
• If the code requires the gas lines to be tested at a
pressure exceeding 14” W.C., the water heater and its
manual shut-off valve must be disconnected from the gas
supply piping system and the line capped.
• If the gas lines are to be tested at a pressure less than
14” W.C., the water heater must be isolated from the gas
supply piping system by closing its manual shut-off valve.
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 technician after installation of
the gas piping system. While purging the gas piping system
of air, insure 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.
9
LP Gas Only
WARNING
Explosion Hazard
Have a qualified technician make sure that the L.P. gas
operating pressure does not exceed 13” water column.
Examples of a qualified person include: licensed
plumbers, authorized gas company personnel, and
authorized service personnel.
Failure to do so can result in death, explosion, or fire.
Liquefied petroleum gas is over 50% heavier than air
and in the occurrence of a leak in the system, the gas
will settle at floor level. Basements, crawl spaces, closets
and areas below ground level will serve as pockets for
the accumulation of gas. Before lighting an L.P. gas water
heater, smell all around the appliance at floor level. If you
smell gas, follow the instructions as given in the warning
on the front page.
When your L.P. tank runs out of fuel, turn off the gas at
all gas appliances including pilot lights. After the tank is
refi lled, all appliances must be re-lit according to their
manufacturer’s instructions.
10
COMBUSTION AIR & VENTILATION
WARNING
Carbon Monoxide Warning
Water heater must be vented to outdoors.
Vent must be installed by a qualified technician using
the installation instructions.
Examples of a qualified technican include: gas
technicians, authorized gas company personel, and
authorized service persons.
Failure to so do 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
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 BTUH of the total input for all gas-using
appliances.
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 BTUH of the total input for all gas appliances. The
table below shows a few examples of the minimum square
footage (area) required for various BTUH inputs.
TABLE 3
Minimum
BTUH Input
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.
• Modern home construction usually requires supplying
outside air into the water heater area.
Square
Feet with
8’ Ceiling
Typical Room
with 8’ Ceiling
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 BTUH input of all gas utilization equipment (i.e., water
heaters, furnaces, clothes dryers, etc.) and the method by
which the air is provided. The BTUH input can be found
on the water heater rating plate. Additional air can be
provided by two methods:
1. All air from inside the building.
2. All air from outdoors.
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PERMANENT
T
OPENINGS TO
HE OUTSIDE OR
ADDITIONAL
ROOMS WITHIN
THE BUILDING
12” MAXIMUM
CLOSET
OR
OTHER
CONFINED
SPACE
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
4 to calculate the minimum free area for each opening.
Figures 6, 7, 8A and 8B are typical examples of each
method.
Louvers and Grilles
12” MAXIMUM
FIGURE 4.
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.
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 BTUH of the total input rating of
all gas utilization equipment in the confined area, but not
less than 100 square inches (Figure 5).
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.
Louvers and grilles must be locked open or interconnected
with the equipment so that they are opened automatically
during equipment operation.
Keep louvers and grilles clean and free of debris or other
obstructions.
TABLE 4
CONFINED
SPACE
Minimum Free Area of Permanent Openings for
Ventilation and Combustion Air Supply - All Air from
Outdoors Only.
Based on total BTUH input rating for all utilizing
equipment within the confi ned space.
PERMANENT
OPENINGS
1 SQUARE
INCH/1000
BTUH
(MINIMUM
100 SQ. IN.)
FIGURE 5.
All Air from Outdoors
Opening Source
*D irec t t o o utd oors 1 sq. in, per 4000 BTUH F igu r e 6
Ver tic al Duc t s 1 sq. in, per 4000 BTUH Fi gure 7
Ho r izo ntal D ucts 1 sq. in, per 2000 BTUH Figu re 8A
Si ngl e O p eni ng 1 sq. in, per 3000 BTUH Figu re 8B
Example: A water heater with an input rating of 50,000 BTUH using
horizontal ducts would require each opening to have a minimum free
area of 25 square inches.
Minimum free area = 50,000 BTUH x 1 sq. in. / 2000 BTUH = 25 sq. in.
These openings connect directly with the outdoors through
*
a ventilated attic, a ventilated crawl space, or through an
Minimum Free Area
Per Opening (sq. in.) Reference Drawing
outside wall.
Outdoor fresh air can be provided to a confined area either
directly or by the use of vertical and horizontal ducts. The
Consult the local codes of your area for specific ventilation
and combustion air requirements.
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