American Water Heater POWER VENT GAS User manual

Installation and Operating Manual
1010 319869-000
KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE
WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.
POWER VENT GAS MODELS
ALL TECHNICAL AND WARRANTY QUESTIONS: SHOULD BE DIRECTED TO THE LOCAL DEALER FROM WHOM THE WATER HEATER WAS
PURCHASED.
HYBRID GAS WATER HEATERS
• For Your Safety •
AN ODORANT IS ADDED TO THE GAS USED
BY THIS WATER HEATER.
ANSI Z21.10.3b-2008
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TABLE OF CONTENTS
SAFE INSTALLATION, USE AND SERVICE 3
GENERAL SAFETY 4
INTRODUCTION 6
Get To Know Your Water Heater - Gas Models. . . . . 8
Replacement Parts And Deliming Products . . . . . . . 8
INSTALLATION CONSIDERATIONS 9
Rough In Dimensions . . . . . . . . . . . . . . . . . . . . . . . . 9
Water Piping - Mixing Valve Usage. . . . . . . . . . . . . .11
Facts To ConsiderAbout Location. . . . . . . . . . . . . . 12
Handle Installation. . . . . . . . . . . . . . . . . . . . . . . . . . 13
Earthquake Zones. . . . . . . . . . . . . . . . . . . . . . . . . . 14
Combustion Air And Ventilation. . . . . . . . . . . . . . . . 16
Appliances In Unconfined Spaces . . . . . . . . . . . . . 16
Appliances In Confined Spaces . . . . . . . . . . . . . . . 16
Chemical Vapor Corrosion . . . . . . . . . . . . . . . . . . . 18
Water Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Closed Water Systems . . . . . . . . . . . . . . . . . . . . . . 18
Thermal Expansion. . . . . . . . . . . . . . . . . . . . . . . . . 18
Hard Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Temperature-pressure Relief Valve. . . . . . . . . . . . . 19
Gas Piping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Sediment Traps. . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Gas Line Purging . . . . . . . . . . . . . . . . . . . . . . . . . . 22
High Altitude Installations . . . . . . . . . . . . . . . . . . . . 22
Flooding/freezing. . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Filling The Water Heater . . . . . . . . . . . . . . . . . . . . . 22
Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Vent Pipe Termination . . . . . . . . . . . . . . . . . . . . . . . 23
Planning The Vent System . . . . . . . . . . . . . . . . . . . 23
Condensate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Installation Of Vent System. . . . . . . . . . . . . . . . . . . 25
Vent Terminal Installation, Sidewall. . . . . . . . . . . . . 25
Sequence Of Installations. . . . . . . . . . . . . . . . . . . . 26
Installation Sequence . . . . . . . . . . . . . . . . . . . . . . . 26
Installation Of Vent System, Sidewall . . . . . . . . . . . 27
Installation Of Vertical Vent System . . . . . . . . . . . . 27
Vent Pipe Preparation. . . . . . . . . . . . . . . . . . . . . . . 28
Connection To Vent Pipe. . . . . . . . . . . . . . . . . . . . . 30
U.s. Power Vent . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Electrical Connections. . . . . . . . . . . . . . . . . . . . . . . 32
CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
OPERATING INSTRUCTIONS 33
Display Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Lighting Instructions . . . . . . . . . . . . . . . . . . . . . . . . 36
Heat Cycle Definitions. . . . . . . . . . . . . . . . . . . . . . . 37
Temperature Regulation . . . . . . . . . . . . . . . . . . . . . 38
Unique Hybrid Features . . . . . . . . . . . . . . . . . . . . . 39
Temperature Regulation . . . . . . . . . . . . . . . . . . . . . 41
Constant Output Temperature Control . . . . . . . . . . 42
Start Up Conditions. . . . . . . . . . . . . . . . . . . . . . . . . 42
Operational Conditions . . . . . . . . . . . . . . . . . . . . . . 42
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Housekeeping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Venting System Inspection . . . . . . . . . . . . . . . . . . . 43
Flood Damage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Burner Operation And Inspection . . . . . . . . . . . . . . 43
Anode Rod Inspection. . . . . . . . . . . . . . . . . . . . . . . 43
Anode Rod Replacement . . . . . . . . . . . . . . . . . . . . 44
Temperature-pressure Relief Valve Operation . . . . 44
Motors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Snow Accumulation. . . . . . . . . . . . . . . . . . . . . . . . . 45
Cleaning The Inlet Water Filter . . . . . . . . . . . . . . . . 45
Cleaning The Heat Engine . . . . . . . . . . . . . . . . . . . 45
Flushing The Heat Exchanger (Lime Build-up). . . . 45
Draining The Tank . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Fault Indication And Error Codes . . . . . . . . . . . . . . 46
Diagnostic Display. . . . . . . . . . . . . . . . . . . . . . . . . . 47
TROUBLESHOOTING 51
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Leakage Checkpoints . . . . . . . . . . . . . . . . . . . . . . . 53
Parts Identification. . . . . . . . . . . . . . . . . . . . . . . . . . 54
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . 56
LIMITED RESIDENTIAL GAS WARRANTY 57
NOTES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Fill out and keep with water heater.
IMPORTANT INFORMATION
Model Number _________________________________________
Serial Number__________________________________________
Installation Information:
Date Installed __________________________________________
Company’s Name_______________________________________
Street or P.O. Box_______________________________________
City, State, and Zip Code _________________________________
Phone Number ____________ Plumber’s Name_______________

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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 own water heater to warn you and
others ofa potential injuryhazard. Read and obeyall safetymessages and instructionsthroughout this manual. Itis very important
that the meaning of each safety message is understood by you and others who install, use or service this water heater.
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 listed in the act.
IMPORTANT DEFINITIONS
• Qualified Installer or Service Agency: Installation and service of this water heater requires ability equivalent to that
of a Qualified Agency (as defined by ANSI below) in the field involved. Installation skills such as plumbing, air supply,
venting, gas supply, electrical supply are required in addition to electrical testing skills when performing service.
• ANSI Z223.1 2006 Sec. 3.3.83: “QualifiedAgency” - “Any individual, firm, corporation or company that either in person
orthrough a representative is engaged in andis responsiblefor (a) the installation, testing or replacementof gaspiping
or (b) the connection, installation, testing, repair or servicing of appliances and equipment; that is experienced in such
work; that is familiar with all precautions required; and that has complied with all the requirements of the authority
having jurisdiction.”.
• Gas Supplier: TheNaturalGasor Propane Utilityorservicewho supplies gasforutilizationby the gasburningappliances
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.
SAFE INSTALLATION, USE AND SERVICE

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GENERAL SAFETY

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GENERAL SAFETY
Breathing carbon monoxide can cause brain damage or death.
Always read and understand instruction manual.
• Install vent system In accordance with codes.
• Do not operate water heater if flood damaged.
• Special Consideration must be taken with
installations above 11,000' (3,352m) for standard
models.
• Do not operate if soot buildup is present.
• Do not obstruct water heater air intake with
insulating jacket.
• Do not place chemical vapor emitting products
near water heater.
• Gas and carbon monoxide detectors are
available.
• No vent damper installation is compatible with
this power vented water heater.
• DO not elevate the condensate hose on the
bottom of the water heater above the bracket
attached to the side of the unit. This must be true
for the entire length of the hose including the exit
into an appropriate drain.
• Condensate lines must be free and clear of debris
and must not allow back flow through the hose.
The condensate lines must be able to flow freely
to an appropriate drain.
• Do not allow condensate lines to become crimped
closed.
• Analyze the entire vent system to make sure that
condensate will not become trapped in a section
of vent pipe and therefore reduce the open cross
sectional area of the vent.
Breathing Hazard - Carbon Monoxide Gas
WARNING
Installation: Do not install the water heater where flammable
products will be stored or used.
Vapors from flammable
liquids may explode and
catch fire causing death or
severe burns.
Do not use or store
flammable products such as
gasoline, solvents or adhe-
sives in the same room or
area near the water heater.
Keep flammable products:
1. far away from heater,
2. in approved containers,
3. tightly closed and
4. out of children's reach.
Water heater has a main
burner and spark generator.
The spark generator:
1. can be triggered at any
time and
2. the spark will ignite
flammable vapors.
Vapors:
1. cannot be seen,
2. are heavier than air,
3. go a long way on the floor
and
4. can be carried from other
rooms to the the
electodes by air currents.
Flammable Vapors
FLAMMBLE
DANGER

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Thank You for purchasing this water heater. Properly
installedandmaintained,itshould give you yearsoftrouble
free service.
Abbreviations Found In This Instruction Manual:
• CSA - Canadian Standards Association
• ANSI - American National Standards Institute
• NFPA - National Fire Protection Association
• ASME - American Society of Mechanical Engineers
• GAMA - Gas Appliance Manufacturer’s Association
• UL - Underwriters Laboratories Inc.
This gas-fired water heater is design certified by CSA
International under American National Standard/CSA
Standard for Gas Water Heaters ANSI Z21.10.3 • CSA
4.3 (current edition).
PREPARING FOR THE INSTALLATION
Read the “General Safety” section, of this manual
first and then the entire manual carefully. If you
don’t follow the safety rules, the water heater will not
operate properly. It could cause DEATH, SERIOUS
BODILY INJURY AND/OR PROPERTY DAMAGE.
This manual contains instructions for the installation,
operation, and maintenance of the gas-fired water
heater. You must read and be aware of the warnings
placed throughout the manual. All warnings and all
instructions are essential to the proper operation of
thewater heaterand your safety. Since we cannotput
everythingon the firstfewpages, READTHE ENTIRE
MANUAL BEFORE ATTEMPTING TO INSTALL OR
OPERATE THE WATER HEATER.
The installation must conform with these instructions
and the local code authority having jurisdiction. In
the absence of local codes, the installation must
comply with the current editions of the National Fuel
Gas Code, ANSI Z223.1/NFPA 54 and the National
Electrical Code, NFPA 70. Documents are available
from:
Canadian Standards Association,
5060 Spectrum Way,
Mississauga, Ontario, Canada
L4W 5N6
NFPA documents are also available from:
National Fire Protection Association,
1 Batterymarch Park,
Quincy, MA 02269.
The water heater when installed must be grounded in
accordance with the local codes, or in the absence of
local codes: the National Electrical Code (NFPA 70).
If after reading this manual you have any
questions or do not understand any portion of
the instructions, call the local gas utility or the
manufacturerwhosenameappearsontheratingplate.
1.
2.
3.
4.
Carefully plan the place where you are going to put
thewaterheater. Correctcombustion,vent action, and
vent pipe installation are very important in preventing
death from possible carbon monoxide poisoning and
fires (see Figures 1 and 3). Examine the location to
ensure the water heater complies with the “Facts to
Consider About Location” section in this manual.
For California installation this water heater must be
braced, anchored, or strapped to avoid falling or
moving during an earthquake. See instructions for
correct installation procedures. Instructions may be
obtained from California Office of the StateArchitect,
400 P Street, Sacramento, CA95814.
Massachusetts Code requires this water heater to be
installedin accordance withMassachusetts 248-CMR
2.00: State Plumbing Code and 248-CMR 5.00, See
page 8.
Complies with SCAQMD rule #1146 and districts
having equivalent NOx requirements.
Complies with California’s legislation AB1953 and
Vermont’s legislation Act 193 requirement of a
weighted average maximum of 0.25% lead.
5.
6.
7.
8.
9.
INTRODUCTION

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FIGURE 1
GET TO KNOW YOUR WATER HEATER - GAS MODELS
REPLACEMENT PARTS AND DELIMING
PRODUCTS
Replacement parts and recommended delimer may be ordered through
authorizedservicers or distributors.When ordering parts, providecomplete
model and serial numbers (see rating plate), quantity and name of part
desired. Standard hardware items may be purchased locally.
A Mixing Valve***
B Hot Water Outlet (Tempered)***
C Pipe Insulation***
D Inlet Water Shutoff Valve***
E Cold Water Inlet***
F Expansion Tank***
G Vent Termination Elbow**
H Access Door (Heat Engine)
I Earthquake Strap***
J Power Cord*
K Main Manual Gas Shutoff Valve***
L Gas Supply***
M Sediment Pocket***
N Condensate Tube
O Drain Pan***
P Drain Valve
Q Heat Engine Hose - Cold In
R Casing Door (Plastic)
S Display Enclosure (Plastic)
T Heat Engine Hose - Hot Out
U Side Casing (Plastic)
V Top Casing Enclosure (Plastic)
W Exhaust Elbow Assembly
X T&P Relief Valve
Y Anode
Z Inlet Dip Tube
* CAUTION HARNESS HAS 120 VAC. IN
OPERATION.
** See “Planning the Vent System,” “Installation
of Vent System” and “Condensate” for more
information.
*** These items not included.
YZ
N
W
X
F
J
H
U
VA
G
EDB C
N
O
PQ
R
S
T
M
L
K
I

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Capacity, Gas and Electrical Characteristics
Model Approx. Capacity Input Gas
Type Gas Supply Pressure Manifold Pressure Electrical Characteristics
U.S. Gals. Litres BTU/hr Max.
in. WC (kPa) Min. in. WC (kPa) in. WC (kPa) Volts/Hz Amperes
GH-90N 25 94.6 100,000 Nat. 14.0 (3.49) 5.0 (1.25) 4.2 (1.05) 120/60 2.5
Minimum gas supply pressure must be maintained under both load and no load (dynamic and static) conditions.
Manifold Pressure is preset on the gas valve by the manufacturer; DO NOT ATTEMPT TO ADJUST!
Thermal efficiency is 90%.
If the hardness of your water supply is more than of 12 grains per gallon (200 mg/L), if your water supply is acidic or otherwise impure,
the water supply must be treated with approved methods in order to ensure full warranty coverage. Problems resulting from the forma-
tion of scale are not covered by the warranty.
Minimum Clearance To Combustibles Service Clearance Test Pressure
P.S.I.
Top Front Vent Back Sides Floor Front Sides
00000021” (53.3 cm) 12” (30.5 cm) 300
This appliance must be installed in accordance with local codes or, in the absence of local codes, the “National Fuel Gas Code” ANSI
Z223.1/NFPA 54 or the “Natural Gas and Propane Installation Code” CAN/CSAB149.1.
Not for installation in a Manufactured Home (Mobile Home).
This water heater is suitable for water (potable) heating only.
This water heater is suitable for installation in a closet or alcove.
ROUGH IN DIMENSIONS
FIGURE 2
INSTALLATION CONSIDERATIONS
Left Side View
Top View

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

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FIGURE 3
WATER PIPING - MIXING VALVE USAGE
Thisappliancehasbeen design certifiedascomplyingwith
ANSI Z21.10.3/CSA4.3 (latest revision) for water heaters
and is considered suitable for:
Water (Potable) Heating: All models are considered
suitable for water (potable) heating.
TheHybridwaterheaterisaunique design that it combines
the technology of both the storage tank and tankless type
water heaters. A tankless water heater ensures a fixed
constant outlet water temperature, this is achieved by
modulating the water flow to ensure that this temperature
is maintained. In the Hybrid the water supply is heated
as it flows through the heat exchanger over the burners
similar to the tankless water heaters. The heated water is
than stored in the top of the storage tank.
Thetankoutletwatertemperaturewillbewithinamaximum
of 5°F (2.8°C) of the display set-point when the unit ends
the call for heat.
If required by local codes or if a higher fixed temperature
is required, a mixing valve can be installed as shown on
Figure3.
Please note the following:
The system should be installed only with piping that is
suitable for potable (drinkable) water such as copper,
CPVC, PEX or polybutylene. DO NOT use PVC water
piping.
DO NOT use any pumps, valves, or fittings that are not
compatible with potable water.
DO NOT use valves that may cause excessive restriction
to water flow. Use full flow ball or gate valves only.
DO NOT use any lead based solder in potable water
lines. Use appropriate tin-antimony or other equivalent
material.
DO NOT tamper with the gas control/thermostat, igniter,
flammable vapor sensor or temperature and pressure
relief valve. Tampering voids all warranties. Only qualified
service technicians should service these components.
DO NOT use with piping that has been treated with
chromates, boiler seal, or other chemicals.
DO NOT add any chemicals to the system piping which
will contaminate the potable water supply.
HOTTER WATER CAN SCALD:
Water heaters are intended to produce hot water. Water
heated to a temperature which will satisfy space heating,
clotheswashing, dish washing,and other sanitizingneeds
canscald and permanentlyinjure you uponcontact. Some
people are more likely to be permanently injured by hot
water than others. These include the elderly, children,
TO SUITABLE
DRAIN
DRAIN VALVE
COLD WATER
INLET
METAL
DRAIN PAN 6 in.
(15cm)
MAX.
AIR GAP
DISCHARGE
PIPE (DO NOT
CAP OR PLUG)
TEMPERATURE-
PRESSURE
RELIEF VALVE
TEMPERED
POTABLE WATER
SUGGESTED PIPING
ARRANGEMENT
FOR TOP
CONNECTIONS
SHUT-OFF VALVE TEMPERED
POTABLE WATER
PIPE INSULATION
(RECOMMENDED)
FLOOR
DRAIN
MIXING
VALVE
(OPTIONAL)
THERMAL
EXPANSION
TANK

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and the physically or developmentally disabled. If anyone
using hot water from this heater fits into one of these
groups or if there is a local code or state law requiring a
certain temperature water at the hot water tap, then you
must take special precautions. In addition to using the
lowestpossible temperature setting that satisfiesyour hot
water needs, a means such as a Mixing Valve should be
used at the hot water taps used by these people or at the
waterheater (seeFigure 3). Mixingvalves areavailable at
plumbing supply or hardware stores. Consult a Qualified
Installer or Service Agency. Follow the mixing valve
manufacturer’s instructions for installation of the valves.
Beforechangingthefactory setting on thethermostat,read
the “Temperature Regulation” section in this manual.
FACTS TO CONSIDER ABOUT LOCATION
Carefully choose an indoor location for the new water
heater, because the placement is a very important
considerationforthe safety oftheoccupantsin the building
and for the most economical use of the appliance. This
water heater is not for use in manufactured (mobile)
homes or outdoor installation.
Whetherreplacing an oldwater heater orputting thewater
heater in a new location, the following critical points must
be observed:
Select a location indoors as close as practical to the
ventterminalor location towhichthewater heater vent
piping is going to be connected, and as centralized
with the water piping system as possible.
A pressure-reducing valve and/or an expansion tank
may be required for installations where the water
pressure is high. The pressure-reducing valve should
be located on the supply to the entire house in order
to maintain equal hot and cold water pressure.
Selected location must provide adequate clearances
for servicing and proper operation of the water
heater.
Avoid locations that could cause the water heater to
freeze from outside air.
Selected location must provide access to a properly
grounded electrical branch circuit.Adedicated circuit
is preferred. Do not use a GFI outlet.
Important: Do not use an extension cord to connect the
water heater to an electrical outlet.
1.
2.
3.
4.
5.
Important: The electrical controls used inside the gas
control of this water heater are polarity sensitive. Ensure
theelectricalsupplyisconnectedcorrectlyinthereceptacle
box. Failure to connect correctly will prevent the unit from
functioning properly.
Installation of the water heater must be accomplished in
such a manner that if the tank or any connections should
leak, the flow will not cause damage to the structure. For
this reason, it is not advisable to install the water heater
in an attic or upper floor. When such locations cannot be
avoided, a suitable metal drain pan should be installed
under the water heater. Drain pans are available at your
local hardware store. Such a drain pan must have a
clearanceof atleast 1.0in. (2.5cm)greater thanany point
on the water heater’s outer jacket and must be piped to
an adequate drain. The pan must not restrict combustion
air flow. See Figure 1.
Water heater life depends upon water quality, water
pressure and the environment in which the water heater
is installed. Water heaters are sometimes installed in
locations where leakage may result in property damage,
evenwith the useof a drainpanpiped toadrain. 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 highly
recommended and are available from some plumbing
supply wholesalers and retailers, and detect and react to
leakage in various ways:
• Sensorsmounted inthe drainpan thattrigger analarm
or turn off the incoming water to the water heater when
leakage is detected.
• Sensorsmountedin the drainpanthat turn offthe water
supply to the entire building 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.
AVOIDAREASWHEREFLAMMABLELIQUIDS(VAPORS)
ARELIKELYTOBEPRESENTORSTORED(GARAGES,
STORAGE AND UTILITY AREAS, ETC.): Flammable
liquids(suchas gasoline, solvents,propane(LPorbutane,
etc.)and othersubstances (such asadhesives, etc.))emit
flammable vapors which can be ignited by a gas water
heater’s igniter or main burner. The resulting flashback
and fire can cause death or serious burns to anyone in
the area.

www.americanwaterheater.com 13
Also,thewater heater mustbelocated and/orprotectedso
it is not subject to physical damage by a moving vehicle.
HANDLE INSTALLATION
For ease of handling and carrying, plugs are provided
in the side of the shroud that can be removed and pipe
handles inserted (see Figure 4).
• Remove plastic plugs from shroud side panels.
• Screw a short length of 3/4” NPT pipe into the sides of
the water heater.
• Usethehandlestomovethe water heater tothedesired
location.
• Remove the handles.
• Reinstall the plastic plugs in the shroud side panels.
Handle Handle
FIGURE 4
Installation: Do not install the water heater where flammable
products will be stored or used.
Vapors from flammable
liquids may explode and
catch fire causing death or
severe burns.
Do not use or store
flammable products such as
gasoline, solvents or adhe-
sives in the same room or
area near the water heater.
Keep flammable products:
1. far away from heater,
2. in approved containers,
3. tightly closed and
4. out of children's reach.
Water heater has a main
burner and spark generator.
The spark generator:
1. can be triggered at any
time and
2. the spark will ignite
flammable vapors.
Vapors:
1. cannot be seen,
2. are heavier than air,
3. go a long way on the floor
and
4. can be carried from other
rooms to the the
electodes by air currents.
Flammable Vapors
FLAMMBLE
DANGER
This water heater must not be installed directly on
carpeting. Carpeting must be protected by metal or wood
panel beneath the appliance extending beyond the full
width and depth of the appliance by at least 3in. (7.6cm)
inany direction,or ifthe applianceis installedin an alcove
or closet, the entire floor must be covered by the panel.
Failure to heed this warning may result in a fire hazard.

14 www.americanwaterheater.com
Wheninstalling theheater, consideration must be givento
proper location. Location selected should be as close to
the wall as practicable and as centralized with the water
piping system as possible.
FIGURE 5
Minimum clearances between the water heater and
combustible construction are 0 in. at the sides and rear,
0 in. (0cm) from the front and 2 in. (5.08cm) from the top
(see Figure 5). If clearances stated on the heater differ
from these distances, install water heater according to
clearances stated on the heater.
Adequate top clearance of 24 in. (61cm) for servicing this
appliance, such as changing the anodes etc., should be
considered before installation.
A minimum front clearance of 20 in. (51cm) and 10 in.
(26cm) of side clearance must be allowed for access to
replaceable parts.
EARTHQUAKE ZONES
In Earthquake Zones the water heater must be braced,
anchored, or strapped to avoid moving during an
earthquake.Contact local utilitiesforcode requirementsin
your area. The Spacemaker®TSE25 Bear Claw™ Water
HeaterStrapissuitableforbracingthe Hybrid water heater.
Follow the manufacturer’s instructions for installing the
braces. Be sure to wear protective goggles and gloves
when handling any kind of sheet metal product.
Tabs have been provided on each side of the rear portion
of the shroud. The top and bottom of each tab must be
cut and gently bent “inwards” thus allowing the straps to
exit the shroud (see Figure 9).
In order to access the tabs and install the earthquake
straps it is necessary to remove the top, front and side
panels of the shroud as follows (see Figures 6 - 8):
Door opening
Unlockthe door byrotating the lockcounter-clockwise
with a wide, slot screwdriver.
Release the top and bottom door pins by prying the
pins out, using a small screwdriver.
Open the door (the door remains fastened to the left
side panel).
Remove the top casing (front).
Use a screwdriver to remove the six screws securing
the top casing.
Lift up and remove casing top (front).
1.
2.
3.
1.
2.
Remove the right side panel
Use a screwdriver to remove the screw from the
bottom, front of the right side panel.
Remove the three screws from the right side panel
towards the rear of the unit.
Remove the screw from the top of the unit.
Push the panel back and lift out.
Remove the left side panel
Use a screwdriver to remove the screw from the
bottom, front of the left side panel.
Remove the three screws from the left side panel
towards the rear of the unit.
Remove the screw from the top of the unit.
Push the panel back and lift out.
Access To
Door Pins
Door
Lock
Screws
Top Casing
(Front)
FIGURE 6
1.
2.
3.
4.
1.
2.
3.
4.

www.americanwaterheater.com 15
Screws Screws
Top
Casing (Front)
FIGURE 7
Screws
FIGURE 8
FIGURE 9
After the heater has been positioned and the earthquake
straps have been installed, re-assemble the shroud in the
reverse order.

16 www.americanwaterheater.com
COMBUSTION AIR AND VENTILATION
A gas water heater cannot operate properly without the
correct amount of air for combustion. Do not install in a
confined area such as a closet, unless you provide air as
shown in the “Facts to Consider About Location” section.
Never obstruct the flow of ventilation air. If you have any
doubtsor questionsat all, call your gassupplier. Failureto
provide the proper amount of combustion air can result in
a fire or explosion and cause death, serious bodily injury,
or property damage.
FIGURE 10
If this water heater will be used in beauty shops, barber
shops, cleaning establishments, or self-service laundries
withdry cleaningequipment, it isimperative thatthe water
heater(s) be installed so that all air for combustion and
ventilation is taken from outdoors.
Note: Vent length should be long enough that the outside
air will not freeze the water heater.
Propellants of aerosol sprays and volatile compounds,
(cleaners, chlorine based chemicals, refrigerants, etc.) in
additionto being highlyflammablein manycases,will also
reactto formcorrosive hydrochloric acid when exposed to
the combustion products of the water heater. The results
can be hazardous, and also cause product failure.
APPLIANCES IN UNCONFINED SPACES
UNCONFINED SPACE is spacewhose volume isnot less
than50cubic feet per1,000Btu per hour(4.8cubic meters
per kW) of the aggregate input rating of all appliances
installedinthat space. Roomscommunicatingdirectly with
the space in which the appliances are installed, through
openings not furnished with doors, are considered a part
of the unconfined space.
In unconfined spaces in buildings, infiltration may be
adequate to provide air for combustion, ventilation and
dilution of flue gases. However, in buildings of tight
construction (for example, weather stripping, heavily
insulated, caulked, vapor barrier, etc.), additional air may
need to be provided using the methods described in
“Appliances in Confined Space” that follows.”
APPLIANCES IN CONFINED SPACES
CONFINED SPACE is aspace whosevolume isless than
50 cubic feet per 1,000 Btu per hour (4.8cm per kW) of
the aggregate input rating of all appliances installed in
that space.
When drawing combustion air from inside a building to a
confinedspace,such aspace should beprovided with two
permanentopenings. ONE WITHIN12 in. (30cm)OFTHE
ENCLOSURE TOP AND ONE WITHIN 12 in. (30cm) OF
THEENCLOSURE BOTTOM.Eachopening should have
a free area of 1 square inch per 1000 Btu/hr (22 cm2/kW)
of the total input of all appliances in the enclosure, but not
less than 100 square in. (645 cm2).
Iftheconfinedspaceis withinabuilding,air for combustion
and ventilation must be obtained from outdoors. When
directlycommunicatingwiththeoutdoorsorcommunicating
through vertical ducts, two permanent openings, located
in the above manner, should be provided. Each opening
should have a free area of not less than 1 square inch per
4000 Btu/hr (5.5 cm2/kW) of total input of all appliances in
the enclosure. If horizontal ducts are used, each opening
should have a free area of not less than 1 square inch per
2000Btu/hr (11 cm2/kW)of thetotal inputof allappliances
in the enclosure.
A. ALLAIR FROM INSIDE BUILDINGS: (See Figures 10
& 11)
Theconfinedspaceshouldbeprovidedwithtwopermanent
openings communicating directly with an additional
room(s) of sufficient volume so that the combined volume
of all spaces meets the criteria for an unconfined space.
The total input of all gas utilization equipment installed in
the combined space should be considered in making this
determination.Each opening shouldhave aminimum free
area of 1 square inch per 1,000 Btu per hour (22 cm2/kW)
of the total input rating of all gas utilization equipment in
the confined space, but not less than 100 square in. (645
cm2).One opening should commence within12 in.(30cm)
ofthe topand onecommencing within12 in. (30cm) of the
bottom of the enclosures.

www.americanwaterheater.com 17
FIGURE 11
B. ALLAIR FROM OUTDOORS: (See Figures 12, 13and
14)
Theconfinedspaceshouldbeprovidedwithtwopermanent
openings,one commencingwithin 12in. (30cm) of the top
andone commencing within12 in. (30cm)from thebottom
of the enclosure. The openings should communicate
directly, or by ducts, with the outdoors or spaces (crawl or
attic) that freely communicate with the outdoors.
1. When directly communicating with the outdoors, each
opening should have a minimum free area of 1 square
inch per 4,000 Btu per hour (5.5 cm2/kW) of total input
rating of all equipment in the enclosure (see Figure
12).
FIGURE 12
2. Whencommunicatingwith the outdoors throughvertical
ducts, each opening should have a minimum free area
of 1 square inch per 4,000 Btu per hour (5.5 cm2/kW)
of total input rating of all equipment in the enclosure
(see Figure 13).
3. When communicating with the outdoors through
horizontalducts,each openingshouldhave a minimum
free area of 1 square inch per 2,000 Btu per hour (11
cm2/kW)) of total input rating of all equipment in the
enclosure (see Figure 14).
FIGURE 13
4. When ducts are used, they should be of the same
cross-sectionalarea as thefree area ofthe openings to
whichtheyconnect.Theminimumshortside dimension
of rectangular air ducts should not be less than 3 in.
(7.6cm) (see Figure 14).
FIGURE 14
5. Alternativelya singlepermanent openingmay beused
whencommunicating directly withthe outdoors,or with
spacesthat freely communicate with theoutdoors.The
opening should have a minimum free area of 1 square
inchper 3,000BTU perhour (8.3 cm2/kW) of total input
rating of all equipment in enclosure (see Figure 15).
FIGURE 15

18 www.americanwaterheater.com
6. Louvers and Grilles: In calculating free area,
consideration should be given to the blocking effect of
louvers,grillesorscreens protecting openings. Screens
usedshould not besmaller than1/4 in. (0.64cm)mesh.
If the free area through a design of louver or grille is
known,itshould be usedincalculating the sizeopening
requiredto provide thefreearea specified.Ifthe design
and free area is not known, it may be assumed that
woodlouvers will be 20-25 percentfree areaand metal
louvers and grilles will have 60-75 percent free area.
Louversand grilles should be fixedin theopen position
or interlocked with the equipment so that they are
opened automatically during equipment operation.
7. SpecialConditions Createdby Mechanical Exhausting
or Fireplaces: operation of exhaust fans, ventilation
systems, clothes dryers or fireplaces may create
conditions requiring special attention to avoid
unsatisfactory operation of installed gas utilization
equipment.
CHEMICAL VAPOR CORROSION
CORROSIONOFTHE FLUEWAYSAND VENTSYSTEM
MAY OCCUR IF AIR FOR COMBUSTION CONTAINS
CERTAINCHEMICALVAPORS.SUCHCORROSIONMAY
RESULT IN FAILURE AND RISK OF ASPHYXIATION.
Spray can propellants, cleaning solvents, refrigerator and
air conditioning refrigerants, swimming pool chemicals,
calciumand sodium chloride (water softenersalt), waxes,
and process chemicals are typical compounds which are
potentially corrosive.
Do not store products of this sort near the heater.Also, air
whichisbroughtincontactwiththeheatershouldnotcontain
any of these chemicals. If necessary, uncontaminated air
should be obtained from remote or outside sources. The
limited warranty is voided when failure of water heater is
due to a corrosive atmosphere. (See limited warranty for
complete terms and conditions).
WATER PIPING
HOTTER WATER CAN SCALD:
Water heaters are intended to produce hot water. Water
heated to a temperature which will satisfy space heating,
clotheswashing,dishwashing,cleaningandothersanitizing
needscanscald andpermanentlyinjure you uponcontact.
Somepeople aremore likelyto bepermanently injuredby
hot water than others. These include the elderly, children,
thephysicallyordevelopmentally disabled. If anyoneusing
hot water fits into one of these groups or if there is a local
code or state law requiring a certain temperature water at
thehot watertap, thenyou musttake specialprecautions.
Inadditionto using the lowestpossibletemperature setting
that satisfies your hot water needs, a means such as a
*mixing valve, should be used at the hot water taps used
by these people or at the water heater (see Figure 3).
Valves for reducing point of use temperature by mixing
cold and hot water are also available:
Consult a Qualified Installer or Service Agency. Follow
manufacturer’s instructions for installation of the valves.
Beforechangingthefactory setting on thethermostat,read
the “Temperature Regulation” section in this manual.
This water heater should not be connected to any heating
systems or component(s) used with a non-potable water
heating appliance.
All piping components connected to this unit should be
suitable for use with potable water.
Toxic chemicals, such as those used for boiler treatment
should not be introduced into this system.
When the system requires water for space heating at
temperatures higher than required for domestic water
purposes, a mixing valve must be installed. Please refer
to Figure 3 for suggested piping arrangement.
CLOSED WATER SYSTEMS
Water supplysystemsmay,becauseof code requirements
or such conditions as high line pressure, among others,
have installed devices such as pressure reducing valves,
check valves, and back flow preventers. Devices such as
these cause the water system to be a closed system.
THERMAL EXPANSION
As water is heated, it expands (thermal expansion). In a
closed system, the volume of water will increase. As the
volume of water increases, 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

www.americanwaterheater.com 19
limited warranty. Thermal expansion can also cause
intermittent temperature-pressure relief valve operation:
waterdischargedfromthe valve due toexcessivepressure
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 harmful
effects of thermal expansion. Contact a plumbing service
agency or your retail supplier regarding the installation of
a thermal expansion tank.
NOTE: If using copper tubing, solder tubing to an
adapter before attaching the adapter to the water
heater connections. Do not solder the water lines
directly to the water heater connections. It will harm
the dip tube and damage the tank.
MIXING
VALVE
(OPTIONAL)
TEMPERED
POTABLE WATER
SHUT-OFF
VALVE
PIPE INSULATION
(RECOMMENDED)
COLD WATER
INLET
Rear View
FIGURE 16
NOTE: To protect against untimely corrosion of hot
and cold water fittings, it is strongly recommended
that di-electric unions or couplings be installed on
this water heater when connected to copper pipe (see
Figure 3 also).
Figures3 and16 showthe typicalattachment ofthe water
piping to the water heater. The water heater is equipped
with 3/4” NPT water connections.
HARD WATER
We highly recommend installing water filtering system or
a water softener before the water heater system. If you
are installing a water filtering system use a 5 micron filter
to reduce particles that can potentially cause nuisance
shutdown problems and prolong the maintenance of the
water heater’s inlet filter. A water softener can affect the
life of the anode installed in this water heater. Refer to
“Anode Rod Inspection” section in this manual.
Cleanthe filteron thewater inletas frequentlyas required
by the quality of your local water. Refer to “Cleaning The
Inlet Water Filter” section of this manual. One additional
filter is supplied with your water heater.
TEMPERATURE-PRESSURE RELIEF VALVE
Thisheaterisprovidedwithaproperlycertifiedcombination
temperature - pressure relief valve by the manufacturer.
The valve is certified by a nationally recognized testing
laboratorythat maintains periodicinspection ofproduction
oflistedequipmentofmaterialsasmeetingtherequirements
for Relief Valves for Hot Water Supply Systems, ANSI
Z21.22 • CSA 4.4, and the code requirements of ASME.
If replaced, the valve must meet the requirements of local
codes, but not less than a combination temperature and
pressure relief valve certified as indicated in the above
paragraph.
The valve must be marked with a maximum set pressure
not to exceed the marked hydrostatic working pressure of
the water heater (150 psi = 1,035 kPa) and a discharge
capacity not less than the water heater Btu/hr input rate
as shown on the water heater’s rating plate.
For safe operation of the water heater, the relief valve
must not be removed from its designated opening nor
plugged.

20 www.americanwaterheater.com
The temperature-pressure relief valve must be installed
directly into the fitting of the water heater designed for the
relief valve. Must terminate a maximum of 6 in. (15cm)
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. Be
certainthat no contactis madewith any liveelectrical part.
The discharge opening must not be blocked or reduced
in size under any circumstances. Excessive length, over
30 ft. (9.14m), or use of more than four elbows can cause
restriction and reduce the discharge capacity of the valve
(see Figures 3 & 19).
No valve or other obstruction is to be placed between the
relief valve and the tank. Do not connect tubing directly to
discharge drain unless a 6 in. (15cm) air gap is provided.
Toprevent bodily injury, hazard tolife,or property damage,
the relief valve must be allowed to discharge water in
quantitiesshould circumstancesdemand. If thedischarge
pipe is not connected to a drain or other suitable means,
the water flow may cause property damage.
The Discharge Pipe:
• Shall not be smaller in size than the outlet pipe size
of the valve, or have any reducing couplings or other
restrictions.
• Shall not be plugged or blocked.
• Shall be of material listed for hot water distribution.
• Shall be installed so as to allow complete drainage of
both the temperature-pressure relief valve, and the
discharge pipe.
• Shallterminateamaximumof 6 in.(15cm)aboveafloor
drain or external to the building. In cold climates, it is
recommended that the discharge line be terminated at
an adequate drain inside the building.
• Shall not have any valve between the relief valve and
tank.
The temperature-pressure relief valve must be manually
operated at least once a year, (see Figure 17). Caution
should be taken to ensure that (1) no one is in front of or
around the outlet of the temperature-pressure relief valve
discharge line, and (2) the water manually discharged will
not cause any bodily injury or property damage because
the water may be extremely hot.
FIGURE 17
If after manually operating the valve, it fails to completely
reset and continues to release water, immediately close
the cold water inlet to the water heater, follow the draining
instructions, and replace the temperature-pressure relief
valve with a new one.
T&P Valve and Pipe Insulation (if supplied)
Remove insulation for T&P valve and pipe connections
from carton.
FIGURE 18
Fit pipe insulation over the incoming cold water line and
the hot water line. Make sure that the insulation is against
the top cover of the heater. Fit T&P valve insulation over
valve.Make sure thatthe insulationdoesnot interferewith
the lever of the T&P valve.
Secure all insulation using tape.