A.O. Smith BTX-80 User Manual

MODEL BTX-80

COMMERCIAL GAS WATER HEATER

Glass-Lined Tank-Type Water Heater

Thank you for buying this energy efficient water heater.
We appreciate your confidence in our products.

You should thoroughly read this manual before installation and/
or operation of this water heater. Please pay particular attention
to the important safety and operating instructions as well as the
WARNING and CAUTIONS.

TABLE OF CONTENTS

P AGE
GET TO KNOW YOUR WA TER HEATER 2-3
GENERAL SAFETY INFORMATION 4-5
INSTALLATION 5-16
OPERA TION 16-18
MAINTENANCE AND

TROUBLESHOOTING 18-21
TROUBLESHOOTING WITH THE LED 22
LIMITED WARRANTY 23

CAUTION

TEXT PRINTED OR OUTLINED IN RED CONT AINS INFORMATION
RELATIVE TO YOUR SAFETY. PLEASE READ THOROUGHLY
BEFORE INSTALLING AND USING THIS APPLIANCE.

A DIVISION OF A.O. SMITH CORPORA TION

McBEE, SOUTH CAROLINA, U.S.A.

www.aosmithwaterheaters.com

KEEP THIS MANUAL IN THE POCKET ON THE HEA TER FOR FUTURE REFERENCE

WHENEVER MAINTENANCE ADJUSTMENT OR SER VICE IS REQUIRED.

PRINTED IN THE U.S.A. 0406 PART NO. 197086-000

1

ROUGH-IN-DIMENSIONS

Rough-In-Dimensions

Model Units A B C D E F G H J K

BTX-80

Top/Side Inlet and Outlet: 3/4" NPT

Inches 70.62 68.20 51.90 20.90 9.15 12.00 22.00 8.00 15.81 26.92

cm 179.37 173.23 131.83 53.09 23.24 30.48 55.88 20.32 40.16 68.38

Gas Inlet: 1/2" NPT

Capacity and Gas and Electrical Characteristics

Model

Approximate Capacity Manifold Pressure Electrical Characteristics

U.S. Gals. Liters Gas Type “WC kPA Volts/Hz Amperes

BTX-80 50 189 Nat. 4.00 0.99 120/60 <5

All models - Maximum Supply Pressure: 14 inches W.C. (3.48kPa)
Minimum Supply Pressure Natural Gas: 5.0 inches W.C. (1.24kPa)
Minimum Pressure must be maintained under both load and no load (static and dynamic) conditions.

Recovery Capacities - U.S. Gallons/Hr. and Liters/Hr. at Temperature Rise Indicated

Model

BTX-80 76,000 22.25

Recovery capacity based on 90% thermal efficiency.

Input Recovery Capacities

Rating

(Btu /h r)

Rating

(kW)

Temp.

Rise

F° 30 40 50 60 70 80 90 100 110 120 130 140
C° 17 22 28 33 39 44 50 56 61 67 72 78

GPH 275 206 165 138 118 104 92 83 75 69 64 59

LPH 1041 780 625 522 447 394 348 314 284 261 242 223

2

TYPICAL INST ALLATION

REPLACEMENT P ARTS AND DELIMING PRODUCTS

Replacement parts and recommended delimer may be ordered
through authorized servicers or distributors. When ordering parts,
provide complete model and serial numbers (see rating plate),
quantity and name of part desired. (See Replacement Parts Insert
for list of part numbers and descriptions.) St andard hardware items
may be purchased locally.

(A) VENT PIPE
(B) ANODE
(C) HOT WATER OUTLET
(D) OUTLET (120 V A C)
(F) GAS SUPPL Y
(G) MAIN MANUAL GAS

SHUT OFF VA LVE
(H) GROUND JOINT UNION
(J) DIRT LEG
(K) OUTER DOOR
(L) UNION
(M) INLET WATER SHUT

OFF VALVE
(N) COLD WATER INLET
(O) INLET DIP TUBE
(P) TEMPERATURE AND

PRESSURE RELIEF VALVE
(Q) RATING PLA TE
(R) INSULATION
(S) VENT TERMINAL
(T) DRAIN VALVE
(U) IGNITER AND MAIN

BURNER

(W) DRAIN PAN
(X) CONTROL
(Y) CONTROL HARNESS*
(AA) MOTOR & BLOWER
(CC) CONDENSATE FITTING

(4 Places as Shown)**
(DD) PLASTIC TOP
(EE) ON/OFF SWITCH
(FF) EXHAUST TEE
(GG) ELBOW
(HH) BUSHING
(II) NIPPLE
(JJ) CONDENSATE TEE
(KK) HOSE BARB
(LL) PLUG
(MM) VENT PIPE ASSEMBLY #1
(NN) VENT PIPE ASSEMBLY #2
(OO) VENT PIPE ASSEMBLY #3
(PP) SIDE RECIRCULATION

LOOP INLET***
(QQ) SIDE RECIRCULATION

LOOP OUTLET*** (not shown)
(RR) VENT A TTENUA TION

ASSEMBLY (V AA) (Optional)

CONDENSA TE ASSEMBLY

* CAUTION HARNESS HAS 120 VAC. IN OPERATION.

** See "PLANNING THE VENT SYSTEM", "CONDENSATE" and "PREPAR A TION

OF BLOWER ASSEMBLY" in the "INSTALLATION" section for more
information.

*** The side recirculation loop connections may not be used as the primary water

inlet and outlet connections. For your convenience, plugs are installed in
these fittings at the factory. Remove these plugs if needed for your specific
installation. Otherwise (as with all connections) check for leaks while filling
the tank with water and after completing the installation.

(U) NA TURAL GAS MAIN BURNER

WITH IGNITER ASSEMBL Y

SIDE VIEW

VACUUM RELIEF

VALVE

*INSTAL L P ER

LOCAL CODES

TEMPERATURE INDICATORS

(X)

TEMPERATURE ADJUSTMENT BUTTONS

FIGURE 1

3

GENERAL SAFETY INFORMA TION

EXTERNAL DAMAGE

Do not operate the water heater until it has been fully checked
out by a qualified technician, if the water heater:

• Has been exposed to fire or damage.

• Displays evidence of sooting.

• Produces steam or unusually hot water.

If the water heater has been subject to flooding it must be
replaced.

LP gas must be used with great caution. It is highly explosive
and heavier than air. It collects first in the low areas making its
odor difficult to detect at nose level. If LP gas is present or even
suspected, do not attempt to find the cause yourself. Go to a
neighbor's house, leaving your doors open to ventilate the house,
then call your gas supplier or service agent. Keep area clear
until a service call has been made.

At times you may not be able to smell an LP gas leak. One cause
is odor fade, which is a loss of the chemical odorant that gives LP
gas its distinctive smell. Another cause can be your physical
condition, such as having a cold or a diminishing sense of smell
with age. For these reasons, the use of a propane gas detector
is recommended.

CHEMICAL V APOR CORROSION

WARNING

CORROSION OF THE FLUEWAYS AND VENT SYSTEM MAY
OCCUR IF AIR FOR COMBUSTION CONTAINS CERTAIN
CHEMICAL VAPORS. SUCH CORROSION MAY RESULT IN
FAILURE AND RISK OF ASPHYXIATION.

Spray can propellants, cleaning solvents, refrigerator and air
conditioning refrigerants, swimming pool chemicals, calcium and
sodium chloride (water softener salt), waxes, and process
chemicals are typical compounds which are potentially corrosive.

Do not store products of this sort near the heater . Also, air which
is brought in contact with the heater should not contain 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).

IMPROPER COMBUSTION

WARNING

ATTIC AND/OR EXHAUST FANS OPERATING ON THE
PREMISES WITH A W A TER HEATER CAN RESUL T IN CARBON
MONOXIDE POISONING AND DEA TH.

OPERATION OF THESE FANS CAN PRODUCE A NEGATIVE
DRAFT IN THE AREA OF THE W ATER HEATER PREVENTING
THE PRODUCTS OF COMBUSTION FROM EXHAUSTING
THROUGH THE VENT PIPE.

The venting of the water heater should be inspected by a
qualified service technician at the time of installation and
periodically thereafter to ensure a down-draft condition
does not exist.

DO NOT OBSTRUCT THE FLOW OF COMBUSTION AND
VENTILATING AIR. ADEQUATE AIR FOR COMBUSTION
AND VENTILATION MUST BE PROVIDED FOR SAFE
OPERATION.

IF YOU EXPERIENCE AN OUT-OF-GAS SITUATION, DO NOT
TRY TO RELIGHT APPLIANCES YOURSELF. Ask your LP
delivery person to relight pilots for you. Only trained LP
professionals should conduct the required safety checks in
accordance with industry standards.

EXTENDED NON-USE PERIODS

WARNING

HYDROGEN GAS CAN BE PRODUCED IN A HOT WATER
SYSTEM SERVED BY THIS HEATER THAT HAS NOT BEEN
USED FOR A LONG PERIOD OF TIME (GENERALLY TWO
WEEKS OR MORE).
FLAMMABLE. To reduce the risk of injury under these conditions,

it is recommended that the hot water faucet be opened for several
minutes at the kitchen sink before using any electrical appliance
connected to the hot water system. If hydrogen is present, there
will probably be an unusual sound such as air escaping through
the pipe as the water begins to flow.

SMOKING OR OPEN FLAME NEAR THE FAUCET A T THE TIME
IT IS OPEN.

HYDROGEN GAS IS EXTREMELY

THERE SHOULD BE NO

INSULA TION BLANKETS

Insulation blankets available to the general public for
external use on gas water heaters are not necessary with
this water heater. The purpose of an insulation blanket is
to reduce the standby heat loss encountered with storage
tank heaters. Your water heater meets and exceeds the
Energy Policy Act standards with respect to insulation and
standby loss requirements, making an insulation blanket
unnecessary.

WARNING

Should you choose to apply an insulation blanket to this
heater, you should follow these instructions (See Figure 1 for
identification of components mentioned below). Failure to
follow these instructions can restrict the air flow required for
proper combustion, potentially resulting in fire, asphyxiation,
serious personal injury or death.

LIQUID PETROLEUM MODELS

WARNING

Water heaters for propane or liquefied petroleum gas (LPG) are
different from natural gas models. A natural gas heater will not
function safely on LP gas and no attempt should be made to
convert a heater from natural gas to LP gas.

• Do not cover the gas valve or temperature & pressure relief
valve.

•

Do not allow insulation to come within 2" of the blower.

• Do not allow insulation to come within 2" of the floor to prevent
blockage of combustion air flow to the burner.

4

• Do not cover the instruction manual. Keep it on the side of the
water heater or nearby for future reference.

heater differ from standard clearances, install water heater
according to clearances stated on heater.

•

Do obtain new warning and instruction labels for placement
on the blanket directly over the existing labels.

•

Do inspect the insulation blanket frequently to make certain it
does not sag, thereby obstructing combustion air flow.

INSTALLATION

REQUIRED ABILITY

INSTALLATION OR SERVICE OF THIS WATER HEATER
REQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED
TRADESMAN IN THE FIELD INVOL VED. PLUMBING , ELECTRICAL
AIR SUPPLY, VENTING AND GAS SUPPL Y ARE REQUIRED.

GENERAL

The heater is designed to operate on natural or propane gases.
HOWEVER, MAKE SURE the gas on which the heater will operate
is the same as that specified on the heater model and rating plate.

The installation must conform to these instructions and the local
code authority having jurisdiction. In the absence of local codes,
the installation must conform to the current edition of National
Fuel Gas Code ANSI Z223.1/NFPA 54 and the National Electrical
Code, NFPA 70. The former is available from the Canadian
Standards Association, 8501 East Pleasant Valley Road,
Cleveland, OH 44131, and both documents are available from
the National Fire Protection Association, 1 Batterymarch Park,
Quincy, MA 02269.

GROUNDING

The water heater, when installed, must be grounded in accordance
with local codes, or in the absence of local codes:

The National Electrical Code, NFPA 70

HIGH AL TITUDE INST ALLA TION

CAUTION

INSTALLA TIONS ABOVE 2000 FT . REQUIRE REPLACEMENT OF
THE BURNER ORIFICE IN ACCORDANCE WITH THE NA TIONAL
FUEL GAS CODE (ANSI Z223.1/NFPA 54). FAILURE TO
REPLACE THE ORIFICE COULD RESULT IN IMPROPER AND
INEFFICIENT OPERATION OF THE APPLIANCE, PRODUCING
CARBON MONOXIDE GAS IN EXCESS OF SAFE LIMITS, WHICH
COULD RESULT IN SERIOUS PERSONAL INJURY OR DEATH.
CONTACT YOUR GAS SUPPLIER FOR ANY SPECIFIC
CHANGES WHICH MAY BE REQUIRED IN YOUR AREA.

SOME MODELS ARE SPECIFICALLY BUILT FOR HIGH
AL TITUDE SERVICE.

A minimum clearance of 4" must be allowed for access to
replaceable parts such as the thermostats, drain valve and relief
valve. A top clearance of 24" should be allowed for blower
assembly service.

Adequate clearance for servicing this appliance should be
considered before installation, such as changing the anodes,
etc. Minimum clearances for proper operation are given above.

WARNING

In cold climates provide protection against freeze-up.
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.

to install the water heater in an attic or upper floor. When such
locations cannot be avoided, a suitable 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 minimum length
and width of at least 2 inches (51 mm) greater that the water heater
dimensions and must be piped to an adequate drain. The pan must
not restrict combustion air flow.

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, 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 leakage 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.

DO NOT INSTALL THIS WATER HEATER DIRECTLY ON A
CARPETED FLOOR. A FIRE HAZARD MAY RESULT.

the water heater must be placed on a metal or wood panel
extending beyond the full width and depth by at least 3 inches
(76.2 mm) in any direction. If the heater is installed in a carpeted
alcove or closet, the entire floor shall be covered by the panel.

For this reason, it is not advisable

WARNING

Instead

PLEASE CHECK THE RATING PLATE BEFORE MAKING
CHANGES.

LOCA TION OF HEATER

When installing the heater , consideration must be given to proper
location. Location selected should be as close to the wall as
practicable with adequate air supply and as centralized with the
water piping system as possible.

The heater is designed for installation on combustible flooring in
a closet having minimum clearances from combustible material
of: 0" clearance from sides and rear, 5.5" from the front and 12"
from the top. (Standard clearance.) If clearances stated on the

AIR REQUIREMENTS

In calculating the free area of a vent opening, the blocking effect
of screens, louvers and grills should be considered. Screens
shall not be of a mesh smaller than 1/4 inch square. If the free
area is not known, the current edition of National Fuel Gas Code
ANSI Z223.1 recommends using figures of 20-25 percent free
area for wood louvers or 60-75 percent for metal grills or louvers.

UNCONFINED SP ACE

In buildings of conventional frame, brick or stone construction,
unconfined spaces may provide adequate air for combustion
and ventilation air for the power venter.

5

If the unconfined space is within a building of tight construction
(building using the following construction: weather stripping, heavy
insulation, caulking, vapor barrier, etc.), air for combustion and
ventilation must be obtained from outdoors. The installation
instructions for confined spaces must be followed.

CONFINED SP ACE

When drawing combustion air from inside a conventionally
constructed building to a confined space, such a space shall be
provided with two permanent openings. ONE WITHIN 12 INCHES
OF THE ENCLOSURE TOP AND ONE WITHIN 12 INCHES OF
THE ENCLOSURE BOTTOM. Each opening shall have a free
area of one square inch per 1000 Btu/hr of the total input of all
appliances in the enclosure, but not less than 100 square inches.

If the confined space is within a building of tight construction, air for
combustion and ventilation must be obtained from outdoors. When
directly communicating with the outdoors or communicating through
vertical ducts, two permanent openings, located in the above
manner, shall be provided. Each opening shall have a free area of
not less than one square inch per 4000 Btu/hr of the total input of
all appliances in the enclosure. If horizontal ducts are used, each
opening shall have a free area of not less than one square inch per
2000 Btu/hr of the total input of all appliances in the enclosure.

3. This unit may NEVER be connected to any existing heating
system or component(s) previously used with a non-potable
water heating appliance.

4. When the system requires water for space heating at
temperatures higher than required for domestic water
purposes, a tempering valve must be installed. Please refer
to Fig. 2 for suggested piping arrangement.

FIGURE 2

CLOSED WATER SYSTEM

WATER CONNECTIONS

Refer to figure 1 for typical installation. A suitable pipe thread
sealant must be used to prevent leakage. Please note that the
side connection plugs are not factory installed. Plugs are supplied
in a kit with the water heater.

WATER (POT ABLE) HEATING AND SPACE HEA TING

1. All piping components connected to this unit for space heating
applications shall be suitable for use with potable water.

2. Toxic chemicals, such as those used for boiler treatment, shall
NEVER be introduced into this system.

A closed system will exist if a back-flow preventer (check valve),
pressure reducing valve, or other similar device is installed in the
cold water line between the water heater and the street main (or
well). Excessive pressure may develop due to the thermal
expansion of heated water causing premature tank failure or
intermittent relief valve operation. This type of failure is not covered
by the limited warranty. An expansion tank may be necessary in
the cold water supply to alleviate this situation, see Fig. 1. Contact
the local plumbing authority.

If the temperature and pressure relief valve on the appliance
discharges periodically, this may be due to thermal expansion in
a closed water supply system. Contact the water supplier or local
plumbing inspector on how to correct situation. DO NOT PLUG
THE TEMPERATURE AND PRESSURE RELIEF VALVE.

GAS CONNECTIONS

The minimum gas supply pressure for input adjustment is 5.0"
W.C. for natural gas.

THE HEATER IS NOT INTENDED FOR OPERA TION AT HIGHER
THAN 14" WA TER COLUMN SUPPL Y PRESSURE. EXPOSURE
TO HIGHER GAS SUPPL Y PRESSURE MAY CAUSE DAMAGE
TO THE CONTROL WHICH COULD RESULT IN FIRE OR
EXPLOSION.

improper testing of gas lines or emergency malfunction of the
supply system, the control must be checked for safe operation.
Make sure that the outside vents on the supply regulators and
the safety vent valves are protected against blockage. These are
parts of the gas supply system not the heater . V ent blockage may
occur during ice storms.

IT IS IMPORTANT TO GUARD AGAINST CONTROL FOULING
FROM CONT AMINANTS IN THE GAS WAYS. SUCH FOULING
MA Y CAUSE IMPROPER OPERATION, FIRE OR EXPLOSION.

All gas piping must comply with local codes and ordinances or
with the National Fuel Gas Code (ANSI Z223.1 / NFPA-54)
whichever applies.

6

If overpressure has occurred such as through

VENT HOOD(S) MAY BE

WARNING

EXTREMELY HOT

DURING OPERA TION.

FIGURE 3

REFER TO FIG. 1 FOR CONNECTION DETAILS. BEFORE
ATTACHING THE GAS LINE BE SURE THAT ALL GAS PIPE IS
CLEAN ON THE INSIDE.

TO TRAP ANY DIRT OR FOREIGN MATERIAL IN THE GAS
SUPPLY LINE, A DIRT LEG (SOMETIMES CALLED DRIP LEG)
MUST BE INCORPORA TED IN THE PIPING, FIGURE 1. The dirt

leg must be readily accessible. Install in accordance with
recommendations of serving gas supplier. Refer to the current
edition of ANSI Z223.1.

To prevent damage, care must be taken not to apply too much
torque when attaching gas supply pipe to thermostat gas inlet.
The thermostat inlet has a pad for use with a backup wrench.

Apply joint compounds (pipe dope) sparingly and only to the male
threads of pipe joints. Do not apply compound to the first two
threads. Use compounds resistant to the action of liquefied
petroleum gases. Do not use teflon tape on thermostat fittings.

CONNECTION OF GAS PIPE

1. When connecting gas pipe to unit, apply wrench to flange
only. Note: Do not use wrench on gas valve or gas valve
bracket.

2. PERFORM THE GAS LEAK TEST AN Y TIME WORK IS DONE
ON A GAS SYSTEM TO AVOID THE POSSIBILITY OF FIRE
OR EXPLOSION WITH PROPERTY DAMAGE, PERSONAL
INJURY, OR LOSS OF LIFE.

The Gas Leak Test is performed as follows: Paint pipe
connections upstream of gas control with a rich soap and
water solution to test for leaks before operating main
burner. Bubbles indicate gas leak. To stop leak, tighten
pipe connections. After piping connections are checked,
turn on main burner. (See Lighting and Operating
Instructions in this manual or on water heater.) With main
burner in operation, paint pipe joints (including flanges),
and control inlet and outlet with rich soap and water
solution. Bubbles indicate gas leak. To stop leak, tighten

flange screws, joints and pipe connections. Replace part
if leak can't be stopped.

DISCONNECT THE APPLIANCE AND ITS INDIVIDUAL SHUT OFF
VAL VE FROM THE GAS SUPPL Y PIPING SYSTEM DURING ANY
SUPPLY PRESSURE TESTING EXCEEDING 1/2 PSI (3.5 kPa).
GAS SUPPLY LINE MUST BE CAPPED WHEN DISCONNECTED
FROM THE HEATER. FOR TEST PRESSURES AT 1/2 PSI (3.5
kPa) OR LESS, THE APPLIANCE NEED NOT BE
DISCONNECTED, BUT MUST BE ISOLA TED FROM THE SUPPL Y
PRESSURE TEST BY CLOSING THE MAIN MANUAL GAS VAL VE.

BEFORE PLACING THE HEATER IN OPERATION, CHECK
FOR GAS LEAKAGE. USE SOAP AND WATER SOLUTION
OR OTHER MATERIAL ACCEPTABLE FOR THIS PURPOSE.
DO NOT USE MATCHES CANDLES, FLAME OR OTHER
SOURCES OF IGNITION TO LOCATE GAS LEAKS.

RELIEF V ALVE

A NEW TEMPERATURE AND PRESSURE RELIEF VALVE
COMPLYING WITH THE ST ANDARD FOR RELIEF V AL VES AND
AUTOMATIC GAS SHUT OFF DEVICES FOR HOT WATER
SUPPLY SYSTEMS, ANSI Z21.22 (CURRENT EDITION) MUST
BE INSTALLED IN THE HEATER IN THE MARKED OPENING
PROVIDED. THE VALVE MUST BE OF A SIZE (INPUT RATING)
THAT WILL BE ADEQUATE FOR YOUR SIZE HEATER.

Check the metal tag on the relief valve and compare it to the heater’s
rating plate. The pressure rating of relief valve must not exceed the
working pressure shown on the rating plate of the heater. In addition
the hourly Btu rated temperature steam discharge capacity of the
relief valve shall not be less than the input rating of the heater. NO

VALVE IS TO BE PLACED BETWEEN THE RELIEF VA LVE AND
TANK. DO NOT PLUG THE RELIEF VAL VE.

7

The drain line connected to this valve must not contain a reducing
coupling or other restriction and must terminate near a suitable
drain to prevent water damage during valve operation. The
discharge line shall be installed in a manner to allow complete
drainage of both the valve and line.

DO NOT THREAD, PLUG

OR CAP THE END OF THE DRAIN LINE.

combustible materials must be provided in accordance with
information in this manual under LOCATION OF HEATER and
INSTALLATION OF VENT SYSTEM, and with the National Fuel
Gas Code and local codes.

PLANNING THE VENT SYSTEM

VENT PIPE ASSEMBLY

There are three parts of the vent pipe assembly that connect the
water heater exhaust (located on the lower back side of the water
heater) to the inlet of the blower assembly (mounted on top of the
water heater) as shown in Figure 1. These parts will need to be
assembled according to the instructions in the VENT PIPE
PREPARATION section of this manual. These PVC parts should
be assembled with ASTM D-2564 grade cement.

Assemble Vent Pipe Assemblies #1, #2 and #3 (See Figure 1)
prior to cementing. The preferred orientation of Vent Pipe
Assembly #1 (Condensate U-Assembly) is shown in Figure 4.
However this assembly may be rotated to a different orientation
as needed for the specific installation requirements. Note the
rotational orientation of each p art by marking a line several inches
long across the joints. The long tube of Vent Pipe Assembly #2
should be approximately vertical. If it is found that either of the
two pieces of pipe in Vent Pipe Assembly #2 are too long for
proper fit-up, then remove as little material as possible to improve
the fit-up. Keep in mind that the pipes will insert slightly further
into the elbows when cement is applied as it acts as a lubricating
agent. The vertical distance from the bottom of the Condensate
U-Assembly to the floor that supports the water heater should be
approximately 0.25" (See Figure 4). Disassemble the parts and
cement back together using the alignment marks. After the cement
dries, attach the assembly to the blower and the water heater
exhaust using the supplied rubber boots and hose clamps.

A condensate trap is incorporated in the bottom of this vent pipe
assembly. See the CONDENSATE section of this manual for
further details.

VENTING

Plan the route of the vent system from the discharge of the blower
to the planned location of the vent terminal.

1. Layout the total vent system to use a minimum of vent pipe
and elbows.

2. This water heater is capable of venting the flue gases the
equivalent of twenty-five (25) feet of 2 inch pipe, sixty-five (65)
feet of 3 inch pipe, or one-hundred twenty-eight (128) feet of 4
inch pipe as listed in Table 1.

TABLE 1

Number of 2" Maximum 3" Maximum 4" Maximum

90° Elbows Pipe (Feet) Pipe (Feet) Pipe (Feet)

1 20 60 120
215 55112
3 10 50 104
4-- 4596
5-- 4088
6-- 3580

The minimum vent lengths for each of the pipe sizes is one
90° on top of the unit plus 2' of straight pipe and the appropriate
termination.

NOTE: The equivalent feet of pipe listed above are exclusive
of the termination. That is, the termination, with an installed
screen, is assumed to be in the system and the remainder of
the system must not exceed the lengths discussed above.

3. The blower discharge adapter is made to accept only straight
sections of 2" pipe. To start, a minimum of 2 inches of 2" pipe
must be attached to the blower discharge (See figure 5).

WARNING

NEVER OPERATE THE HEATER UNLESS IT IS VENTED TO
THE OUTDOORS AND HAS ADEQUA TE AIR SUPPLY TO AVOID
RISKS OF IMPROPER OPERATION, FIRE, EXPLOSION OR
ASPHYXIATION.

VENT PIPE TERMINATION

The first step is to determine where the vent pipe will terminate.
See Figures 3, 8 and 9. The vent may terminate through a sidewall
as shown in Figure 8 or through the roof as shown in Figure 9.

IMPORT ANT

The vent system must terminate so that proper clearances are
maintained as cited in local codes or the current edition of the
National Fuel Gas Code, ANSI Z223.1, 12.9.1 through 12.9.4.

Instructions on proper installation through a sidewall are provided
in Figure 3.

Plan the vent system layout so that proper clearances are
maintained from plumbing and wiring.

Vent pipes serving power vented appliances are classified by
building codes as "vent connectors". Required clearances from

If using 2" inch vent pipe:

A minimum of 2 inches must be att ached to the blower before
the first elbow. After the first elbow add the additional venting
required for the installation. The total system cannot exceed
the lengths discussed above, where each elbow is equal to 5
feet of straight pipe.

If using 3" or 4" inch vent pipe:

Two inches of pipe must be attached to the blower discharge
before adding a reducer to acquire the desired pipe diameter.
An appropriately sized 45 degree elbow (supplied locally – a
schedule 40 DWV) vent terminal must be obtained with an
equivalent screen (supplied in vent kit). The total system cannot
exceed the equivalent pipe lengths discussed above where
each elbow is equal to 5 feet of straight pipe (3" vent pipe) or
8 feet of straight pipe (4" vent pipe).

NOTE: This unit can be vented using only PVC (Class 160,
ASTM D-2241; Schedule 40, ASTM D-1785; or Cellular
Core Schedule 40 DWV , ASTM F-891), Schedule 40 CPVC/
ASTM F-441), or ABS/ASTM D-2661) pipe. The fittings,
other than the

TERMINATION should be equivalent to PVC­DWV fittings meeting ASTM D-2665 (Use CPVC fittings,
ASTM F-438 for CPVC pipe and ABS fittings, ASTM D­2661/3311 for ABS pipe. If CPVC or ABS pipe and fittings
are used, then the proper cement must be used for all

8

joints, including joining the pipe to the Termination (PVC
Material). If local codes do not allow the use of the PVC
termination when a material other than PVC is used for
venting, then an equivalent fitting of that material may be
substituted if the screen in the PVC terminal is removed
and inserted into the new fitting.

PVC Materials should use ASTM D-2564 Grade Cement; CPVC
Materials should use ASTM F-493 Grade Cement and ABS
Materials should use ASTM D-2235 Grade Cement.

If the water heater is being installed as a replacement for
an existing power vented heater in pre-existing venting, a
thorough inspection of the existing venting system must
be performed prior to any installation work. Verify that the
correct material as detailed above has been used, and that
the minimum or maximum vent lengths and terminal
location as detailed in this manual have been met. Carefully
inspect the entire venting system for any signs of cracks
or fractures, particularly at the joints between elbows and
other fittings and the straight runs of vent pipe. Check the
system for signs of sagging or other stresses in the joints
as a result of misalignment of any components in the
system. If any of these conditions are found, they must be
corrected in accordance with the venting instructions in
this manual before completing the installation and putting
the water heater into service.

NOTE: A. For water heaters in locations with high
ambient temperatures (above 100°F) it is recommended
that CPVC or ABS pipe and fittings be used. B. A 22.5
degree elbow (2" vent pipe) or a 45 degree elbow (3" and
4" vent pipe) with an installed screen VENT TERMINAL
must be used in all cases.

an incorporated reservoir may be used to pump the water to an
appropriate drain. To avoid condensate spillage, select a pump
with an overflow switch.

CAUTION MUST BE USED TO ENSURE THA T THE DRAIN IS
FREE AND CLEAR OF DEBRIS AND WILL NOT ALLOW
BACKFLOW THROUGH THE CONDENSATE HOSE.
CONSIDERATION MUST BE GIVEN TO AVOID FREEZING OF
THE CONDENSATE LINES WHICH COULD RESULT IN
EXCESSIVE BUILD UP OF CONDENSA TE INSIDE THE W A TER
HEATER. Waterproof heat tape may be required to prevent
freezing of the condensate lines. Please ensure that the outlet of
the condensate drain does not create a slippery condition which
could lead to personal injury.

The condensate trap may be primed by filling the CONDENSA TE
U-ASSEMBLY with tap water using the supplied hose while the
water heater is not operating. The system is fully primed when
the hose is lowered below the hose clamp on the side of the
water heater and water begins to flow out of the hose. In most
installations the water heater will self-prime the condensate trap
during the first full heat-up cycle. IF A SOUND OF AIR BUBBLING
THROUGH WATER (GURGLING) IS HEARD WHILE THE
BLOWER IS OPERA TING AFTER THE FIRST HEA T -UP CYCLE,
THEN TURN THE UNIT OFF AND CONTACT YOUR PLUMBER
OR SERVICE REPRESENT ATIVE.

IF THESE INSTRUCTIONS ARE NOT FOLLOWED, THE
CONDENSATE BUILD-UP WILL BLOCK THE EXHAUST
OUTLET, WHICH WILL CAUSE IMPROPER OPERATION.

4. There will be some installations where condensate will be
formed in the horizontal runs of the vent system. This
condensate will run into the condensate boot attached to
the blower and out the fitting. The water heater is shipped
with condensate hose that attaches to the fitting on the
condensate boot. No other Tee or fitting is required. See
Figures 5, 8 and 9.

CONDENSATE

WARNING

THIS WATER HEATER IS A CONDENSING UNIT AND
REQUIRES A DRAIN TO BE LOCATED IN CLOSE
PROXIMITY TO ALLOW THE CONDENSATE TO DRAIN
SAFELY. THE CONDENSATE DRAINS FROM THE UNIT AT
THE EXHAUST TEE LOCATED AT THE BOTTOM OF THE
UNIT (SEE FIGURE 4) AND FROM TWO PLACES ON THE
BLOWER ASSEMBLY (SEE FIGURE 5). Condensate from this
water heater is mildly acidic. Please note that some local
codes require that condensate is treated by using a pH
neutralizing filter prior to disposal.

NOTE: IT IS IMPORTANT THAT THE CONDENSATE HOSE
ON THE BOTTOM OF THE UNIT IS NOT INSTALLED
ELEVATED ABOVE THE CLAMP THA T IS SECURED TO THE
SIDE OF THE JACKET, SEE FIGURE 4. THIS MUST BE TRUE
FOR THE ENTIRE LENGTH OF THE HOSE FROM THE CLAMP
TO THE EXIT INTO AN APPROPRIATE DRAIN. If these
instructions are not followed or if the condensate hose is blocked,
water will spill from the condensate trap. As with every water heater
installation, a drain pan should be used to prevent water damage
to the surrounding area. If necessary, a condensate pump with

CONDENSA TE SYSTEM - FIGURE 4

Condensate is likely to form in the venting system attached to
this water heater. The vent pipe should be sloped downward away
from the blower assembly (not less than 1/8" (3.2 mm) nor greater
than 1/2" (12.7 mm) per foot maximum). If the vent piping is vented
level or sloped upwards away from the blower assembly, then
adequate means for draining and disposing of the condensate
needs to be made by the installer. In either case, a 3/8" drain
hose should be connected to the built-in drain port. Prior to
operating the water heater, make sure the removable cap is
installed on the second drain port (See Figure 5).

PREP ARA TION OF BLOWER ASSEMBLY

1. Check to make sure that the wire harness is attached to the
gas valve and blower control box.

2. Make sure no material is still attached to the outside or inside
of blower assembly.

9

CONDENSATE ALSO DRAINS FROM TWO LOCATIONS ON
THE BLOWER ASSEMBLY AS SHOWN IN FIGURE 5. A
CONDENSATE HOSE MUST BE SECURED TO FORM A "TRAP"
AS SHOWN IN FIGURE 5 FOR THESE CONDENSATE DRAIN
CONNECTIONS. THESE TWO HOSES MAY BE CONNECTED
TOGETHER. THE HOSE(S) SHOULD BE ROUTED TO A
SUITABLE DRAIN.

from the blower assembly is included in a supplied kit.

3. Make sure that plastic tubing is still attached to the pressure
switch and fan housing. Also make sure that wiring connector
from motor to control box is securely attached.

4. Do not plug in power cord until vent system is completely
installed. The Power Vent operates on 110-120 V ac. therefore
a grounded outlet must be within reach of the 6 foot flexible
power cord supplied with the vent (see fig.1). The power cord
supplied may be used on a unit only where local codes permit.
If local codes do not permit use of flexible power supply cord:

A. Make sure the unit is unplugged from the wall outlet.

Remove the plastic top cap. Remove screws and open
panel on the front of the control box on the blower.

B. Cut the flexible power cord, leaving enough to be able to make

connections. Remove the strain relief fitting from the box.

C. Install a suitable conduit fitting inside the enclosure.

D. S plice field wiring into existing wiring using code authorized

method (wire nuts, etc).

E. Be certain that neutral and line connections are not

reversed when making these connections.

F . Ground heater properly . This water heater must be grounded

in accordance with the National Electrical Code NFPA 70
and/or local codes. These must be followed in all cases.

A fitting that may be used to join the two hoses

WARNING

FIGURE 5

INST ALLA TION OF VENT SYSTEM

Before beginning installation of piping system thoroughly read
the section of this manual VENT PIPE PREPARATION.

If you are installing your system so that it vents through roof,
please refer to section titled INST ALLA TION OF VERTICAL VENT
SYSTEM.

VENT TERMINAL INSTALLA TION, SIDEW ALL

1. Install the vent terminal by using the cover plate as a template
to mark the hole for the vent pipe to pass through the wall.
BEWARE OF CONCEALED WIRING AND PIPING INSIDE
THE WALL.

2. If the Vent T erminal is being installed on the out side of a finished
wall, it may be easier to mark both the inside and outside wall.
Align the holes by drilling a hole through the center of the
template from the inside through to the outside. The template
can now be positioned on the outside wall using the drilled
hole as a centering point for the template.

3. A) MASONRY SIDE WALLS
Chisel an opening approximately one half inch larger than the
marked circle.

B) WOODEN SIDE WALLS
Drill a pilot hole approximately one quarter inch outside of the
marked circle. This pilot hole is used as a starting point for a
saws-all or sabre saw blade. Cut around the marked circle
staying approximately one quarter inch outside of the line. (This
will allow the vent to easily slide through the opening. The
resulting gap will be covered up by the Vent Terminal cover
plate.) Repeat this step on inside wall if necessary.

SEQUENCE OF INSTALLATIONS, FIGURE 6
Cut a length of PVC pipe about 3.5 inches longer than the wall

thickness at the opening. Glue the vent terminal to this section of
pipe. Slide the wall plate over the pipe to stop against the vent
terminal. Place a bead of caulking (not supplied) around the gap
between the pipe and cover plate. Apply enough to fill some of
the gap between the pipe and wall. Place some of the caulking
on the back of the plate to hold it against the wall after installation.
If the vent pipe is installed up to the wall, with a coupling on the
end against the wall opening, the pipe with the vent terminal can
be prepared for gluing before inserting through the wall. Slide the
pipe through the wall and insert into the coupling on the other
side of the wall, making sure that the vent terminal ends up pointed
in the correct position, see Figure 6.

The water heater must be connected to a grounded metal,
permanent wiring system; or an equipment grounding
conductor must be run with the circuit conductors and
connected to the equipment grounding terminal or lead on
the water heater, see Figure 7.

G. Close the panel on the control box. Make sure that the

access panel is secured shut.

5. The blower discharge boot is made to accept only straight sections
of 2" pipe. T o start off with an elbow , a short section of the furnished
pipe, a minimum of 2 inches, must be cut and glued into the end
of the elbow that will mount on the discharge boot.

VENT TERMINA TION - FIGURE 6

10

CAUTION

LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER
AND DANGEROUS OPERA TION. VERIFY PROPER OPERATION AFTER SER VICING.

POWER VENT WIRING SCHEMA TIC - FIGURE 7

11

INST ALLATION OF VENT SYSTEM, SIDEWALL

With the route of the venting system and selection of materials
completed, as discussed in the section of this manual titled
PLANNING THE VENT SYSTEM, the through the wall vent
terminal in place and the first section of piping, up to first elbow,
installed at the blower it is time to complete the installation of the
venting system for the sidewall installation.

Provide support for all pipe protruding through the roof. All piping
should be properly secured. The vent system piping should be
supported every 5 feet of vertical run and every 3 feet of horizontal
run. All piping and fittings must be joined by the proper procedures
as described under: VENT PIPE PREPARATION.

FIGURE 8

Before completing the installation of the venting system be sure
to read the sections of this manual discussing the proper method
of cutting and cementing PVC pipe and fittings: VENT PIPE
PREPARATION.

It is recommended that the completion of the venting system start
at the blower assembly and run to the coupling on the inside wall
of the vent terminal, Figure 6.

The vent system piping should be supported every 5 feet of vertical
run and every 3 feet of horizontal run. All piping and fittings must
be joined by the proper procedures as described under: VENT
PIPE PREP ARATION.

INSTALLA TION OF VERTICAL VENT SYSTEM

A proper flashing or "BOOT" should be used to seal the pipe where
it exits the roof. The total vent system should not exceed the
equivalent feet of pipe as listed in Table 1.

FIGURE 9

IMPORTANT

The vent system must terminate so that proper clearances
are maintained as cited in local codes or the current edition
of the National Fuel Gas Code, ANSI Z223.1 and as listed
below:

1. Vent Termination must extend a minimum of 18 inches
above roof or 18 inches above the anticipated snow level
to prevent blockage of the vent termination, as shown in
Figures 8 and 9.

2. The venting system shall terminate at least four (4) feet from
or one (1) foot above any gable, dormer or other roof structure
with building interior access; i.e., vent, window, etc.

3. The venting system shall terminate three (3) feet above
any forced air inlet located within ten feet.

12

VENT A TTENUA TION ASSEMBLY

INST ALLATION INSTRUCTIONS

The Vent Attenuation Assembly (VAA) is designed to provide a
reduction in noise that may be transmitted through the vent pipe.
This installation of this VAA is optional. Review directions
thoroughly prior to installing the new VAA. Please contact the
manufacturer of the water heater as shown in the instruction
manual with any questions or for additional product support.

VENT ATTENUATION ASSEMBLY KIT PARTS LIST

The kit consists of the following items. If a part is missing, use the
contact information in the instruction manual to acquire missing
component(s).

• Vent Attenuation Assembly

• flexible tubing

• hose barb

• hex plug (installed on VAA)

• instruction sheet

VENT A TTENUA TION ASSEMBLY INSTALLATION

FIGURE 10: Typical Vertical Installation

Horizontal VAA Installations

1. The VAA is designed to accept two inch PVC pipe into the
adapters on both ends. The V AA can be inst alled to the piping
from either side (there is no specific inlet or outlet). For optimum
performance, install the V AA as close as possible to the blower
assembly.

The V AA is designed for both vertical and horizont al inst allations.
The vertical installation does not require the additional hose barb
and flexible tubing. However, the horizontal inst allation will require
the hose barb and flexible tubing to release condensate buildup
from the VAA. See instructions and diagrams that follow for a
more detailed description.

Vertical VAA Installations (Recommended)

1. The VAA is designed to accept two inch PVC pipe into the
adapters on both ends. The V AA can be inst alled to the piping
from either side (there is no specific inlet or outlet). For optimum
performance, install VAA as close as possible to the blower
assembly.

2. Use standard PVC cement (not included with kit) and glue the
two inch PVC pipe coming from the blower into the VAA.

3. Perform the same sequence on the PVC pipe coming from
the exhaust side (vent terminal side) of the VAA.

4. Make sure the VAA and vent pipe is supported securely to a
permanent fixture (stud or wall). Use standard support straps
(not supplied with kit) that may be found at a local hardware
store. Failure to properly support the V AA and the surrounding
vent pipe could create a hazardous situation. DO NOT puncture
any surface of the VAA.

5. Confirm that the hex plug is securely installed in the 1/2" fitting
found on the center of the VAA pipe. It is imperative that the
plug is secure and air tight to prevent any combustion gases
escaping into the room. If the plug is not securely tightened,
remove and reinstall using Teflon tape on the threads. Once
installed along with the rest of the vent configuration, make
sure to operate the unit through at least one heat up cycle to
ensure there is no leakage around the plug or any joints of the
VAA or vent pipe system.

2. Use standard PVC cement (not included with kit) and glue
the two inch PVC pipe coming from the blower into the

MAKE SURE THE 1/2" FITTING IS ON THE BOTTOM

VAA.

SIDE OF THE VAA. This will be used to run the condensate

hose to a suitable drain. See typical vent installation in
Figure 11.

3. Perform the same sequence on the PVC pipe coming from
the exhaust side (vent terminal side) of the VAA.

4. Make sure the VAA and vent pipe is supported securely to a
permanent fixture (stud or wall). Use standard support straps
(not supplied with kit) that may be found at a local hardware
store. Failure to properly support the V AA and the surrounding
vent pipe could create a hazardous situation. DO NOT puncture
any surface of the VAA.

5. Remove hex plug from the center pipe of the VAA. Locate
the hose barb and install into the 1/2" fitting on the center of
the VAA. Using Teflon tape on the threads, install hose barb
into 1/2" fitting securely . It is imperative that the hose barb is
secure and tight to prevent any combustion gases escaping
into the room.

6. Locate flexible tubing. Slide one end of tube over the hose
barb located on the center pipe of the V AA. The ridges on the
hose barb should prevent the tube from sliding off, however,
to ensure there are no leaks and possible dislocation from
hose barb, use a wire tie or hose clamp (not supplied with kit)
and secure.

7. Take the other end of the flexible tubing and form an 8 inch
diameter circle approximately 3 feet down from the hose barb
located in the VAA. To ensure that the circle (loop) maintains
its shape, use two wire ties (not supplied with kit) to secure it.

13

8. T ake the end of the tube at the bottom of the floor and route it
to a suitable drain. This will provide an area where the
condensate can drain without affecting the area around the
appliance.

9. Once installed along with the rest of the vent configuration,
make sure to operate the unit through at least one heat up
cycle to ensure there is no leakage around the hose barb
or any joints of the VAA or vent pipe system.

FIGURE 11: Typical Horizontal Installation

Installation for VAA with 3 & 4 inch Pipe for Vertical Vent

Some applications may require the use of 3 or 4 inch vent pipe
for longer vent lengths. Please refer to the Figure 12 as you
review these instructions. Refer back to the vertical VAA
installation steps but with the following changes to the vent
construction.

3 inch vent (Vertical VAA Installations)

The VAA is designed to accommodate only 2 inch vent pipe.
The installer must use 2 inch vent pipe between the blower
assembly and the inlet into the VAA. On the outlet side of the
VAA, a short run of 2 inch vent pipe is required. Each of the
short pieces of 2 inch pipe entering and exiting the VAA must
not exceed 6 inches in length. From this point on, a 2 inch to 3
inch adapter may be used. From the 2 inch to 3 inch adapter,
the installer may use up to 65 equivalent feet of pipe. See Figure
12 for typical installation.

4 inch vent (Vertical VAA Installations)

The VAA is designed to accommodate only 2 inch vent pipe.
The installer must use 2 inch vent pipe between the blower
assembly and the inlet into the VAA. On the outlet side of the
VAA, a short run of 2 inch vent pipe is required. Each of the
short pieces of 2 inch pipe entering and exiting the VAA must
not exceed 6 inches in length. From this point on, a 2 inch to 4
inch adapter may be used. From the 2 inch to 4 inch adapter,
the installer may use up to 128 equivalent feet of pipe. See Figure
12 for typical installation.

FIGURE 12: Typical Installation for Vertical Vent with 3 or 4 inch Pipe

Installation of VAA with 3 & 4 inch Pipe for Horizontal Vent

Some applications may require the use of 3 or 4 inch vent pipe
for longer vent lengths. Please refer to the Figure 13 as you review
these instructions. Refer back to the horizontal VAA installation
steps but with the following changes to the vent construction.

3 inch vent (Horizontal VAA Installations)

The V AA is designed to accommodate only 2 inch vent pipe. The
installer must use 2 inch vent pipe between the blower assembly
and the inlet into the VAA. On the outlet side of the VAA, a short
run of 2 inch vent pipe is required. From this point on, a 2 inch to
3 inch adapter may be used. From the 2 inch to 3 inch adapter,
the installer may use up to 52 equivalent feet of pipe. This is 8
equivalent feet less than the original 60 equivalent feet specified
with one elbow due to the 2 inch elbow instead of a 3 inch elbow
required for the vent from the blower to the inlet of the VAA. See
Figure 13 for typical installation.

4 inch vent (Horizontal VAA Installations)

The V AA is designed to accommodate only 2 inch vent pipe. The
installer must use 2 inch vent pipe between the blower assembly
and the inlet into the VAA. On the outlet side of the VAA, a short
run of 2 inch vent pipe is required. From this point on, a 2 inch to
4 inch adapter may be used. From the 2 inch to 4 inch adapter,
the installer may use up to 102 equivalent feet of pipe. This is 18
equivalent feet less than the original 120 equivalent feet specified
with one elbow due to the 2 inch elbow instead of a 4 inch elbow
required for the vent from the blower to the inlet of the VAA. See
Figure 13 for typical installation.

CAUTION
Remember to operate the unit for at least one heat cycle to
ensure there are no air leaks in the vent joints of the V AA and
the vent pipe system. Air leaks will allow flue gas by-product s
to disseminate into the room creating an unsafe environment
and could cause illness, asphyxiation and/or even death.

CAUTION
Remember to operate the unit for at least one heat cycle to
ensure there are no air leaks in the vent joints of the VAA
and the vent pipe system. Air leaks will allow flue gas by­products to disseminate into the room creating an unsafe
environment and could cause illness, asphyxiation and/or
even death.

FIGURE 13: Typical Inst allation for Horizontal Vent with 3 or 4 inch Pipe

14

VENT PIPE PREP ARA TION

1. INITIAL PREPARA TION
A. Make sure the solvent cement you are planning to use is

designed for the specific application you are attempting.

B. Know the physical and chemical characteristics and limitations

of the PVC and CPVC piping materials that you are about to use.
C. Know the reputation of your manufacturer and their products.
D. Know your own qualifications or those of your contractor. The

solvent welding technique of joining PVC and CPVC pipe is a

specialized skill just as any other pipe fitting technique.
E. Closely supervise the installation and inspect the finished job

before start-up.
F. Contact the manufacturer, supplier, or competent consulting

agency if you have any questions about the application or

installation of PVC and CPVC pipe.
G . Take the time and ef fort to do a professional job. Shortcuts will

only cause you problems and delays in start-up. By far, the

majority of failures in PVC and CPVC systems are the result

of shortcuts and/or improper joining techniques.

2. SELECTION OF MATERIALS

• Cutting Device - Saw or Pipe Cutter

• Deburring Tool, Knife, File, or Beveling Machine (2" and above)

• Brush - Pure Bristle

• Rag - Cotton (Not Synthetic)

• Primer and Cleaner

• Solvent Cement - PVC for PVC Components and CPVC for

CPVC Components

• Containers - Metal or Glass to hold Primer and Cement. Select

the type of PVC or CPVC materials to be used on the basis of

their application with respect to chemical resistance, pressure

rating, temperature characteristics, etc.

• Insertion Tool - Helpful for larger diameter pipe and fittings

(6" and above).

on pipe sizes 2" and below. For larger diameter pipe, a brush or
roller must be used.

3.MAKING THE JOINT

A. Cutting

Pipe must be squarely cut to allow for the proper interfacing of
the pipe end and the fitting socket bottom. This can be
accomplished with a miter box saw or wheel type cutter. Wheel
type cutters are not generally recommended for larger diameters
since they tend to flare the corner of the pipe end. If this type of
cutter is used, the flare on the end must be completely removed.

STEP A

NOTE:Power saws should be specifically designed to cut

plastic pipe.

B. Deburring

Use a knife, plastic pipe deburring tool, or file to remove
burrs from the end of small diameter pipe. Be sure to remove
all burrs from around the inside as well as the outside of the
pipe. A slight chamfer (bevel) of about 10°-15° should be
added to the end to permit easier insertion of the pipe into
the end of the fitting. Failure to chamfer the edge of the
pipe may remove cement from the fitting socket, causing
the joint to leak.

PRIMER

It is recommended that T etrahydrofuran (THF) be used to prep are
the surfaces of pipe and fittings for solvent welding. Do not use
water, rags, gasoline or any other substitutes for cleaning PVC or
CPVC Surfaces. A chemical cleaner such as MEK may be used.

CEMENT

The cement should be a bodied cement of approximately 500 to
1600 centipoise viscosity containing 10-20% (by weight) virgin
PVC material solvated with tetrahydrofuran (THF). Small quantities
of dimethyl formamide (DMF) may be included to act as a retarding
agent to extend curing time. Select the proper cement; Schedule
40 cement should be used for Schedule 40 pipe. Never use all­purpose cements, commercial glues and adhesives or ABS
cement to join PVC or CPVC pipe and fittings.

SAFETY PRECAUTION: PRIMERS AND CEMENTS ARE
EXTREMELY FLAMMABLE, AND MUST NOT BE STORED OR
USED NEAR HEAT OR OPEN FLAME. ALSO, USE ONLY IN A
WELL-VENTILA TED AREA.

APPLICATORS

Select a suitable pure bristle type paint brush. Use a proper width
brush or roller to apply the primer and cement . S peedy application
of cement is important due to its fast drying characteristics.
IMPORT ANT NOTE: A dauber type applicator should only be used

STEP B

C. Test dry fit of the joint

T apered fitting socket s are designed so that an interference fit
should occur when the pipe is inserted about 1/3 to 2/3 of the
way into the socket. Occasionally, when pipe fitting dimensions
are at the tolerance extremes, it will be possible to fully insert
dry pipe to the bottom of the fitting socket. When this happens,
a sufficient quantity of cement must be applied to the joint to
fill the gap between the pipe and fitting. The gap must be filled
to obtain a strong, leak-free joint.

D. Inspection, cleaning, priming

Visually inspect the inside of the pipe and fitting sockets and
remove all dirt, grease or moisture with a clean dry rag. If wiping
fails to clean the surfaces, a chemical cleaner must be used.
Check for possible damage such as splits or cracks and replace
if necessary.

15

Depth-of-entry mark

Marking the depth of entry is a way to check if the pipe has reached
the bottom of the fitting socket in step F . Measure the fitting depth
and mark this distance on the pipe O.D. You may want to add
several inches to the distance and make a second mark as the
primer and cement will most likely destroy your first one.

Apply primer to the surface of the pipe and fitting socket with a
natural bristle brush. This process softens and prepares the
PVC or CPVC for the solvent cementing step. Move quickly
and without hesitation to the cementing procedure while the
surfaces are still wet with primer.

E. Application of solvent cement

• Apply the solvent cement evenly and quickly around the
outside of the pipe at a width a little greater than the depth
of the fitting socket.

• Apply a light coat of cement evenly around the inside of the
fitting socket. Avoid puddling.

• Apply a second coat of cement to the pipe end.

G. Cleanup and joint movement

Remove all excess cement from around the pipe and fitting
with a dry cotton rag. This must be done while the cement is
still soft.

The joint should not be disturbed immediately after the
cementing procedure, and sufficient time should be allowed
for proper curing of the joint. Exact drying time is difficult to
predict because it depends on variables such as temperature,
humidity and cement integrity. For more specific information,
you should contact your solvent cement manufacturer.

STEP G

STEP E

NOTE: Cans of cement and primer should be closed at all times

when not in use to prevent evaporation of chemicals and hardening
of cement. They are also very flammable and should be kept
away from heat or flame.

F. Joint assembly

Working quickly , insert the pipe into the fitting socket bottom and
give the pipe or fitting a 1/4" turn to evenly distribute the cement.
Do not continue to rotate the pipe after it has hit the bottom of the
fitting socket. A good joint will have sufficient cement to make a
bead all the way around the outside of the fitting hub. The fitting
will have a tendency to slide back while the cement is still wet so
hold the joint together for about 15 seconds.

OPERATION

WARNING

DO NOT A TTEMPT TO OPERA TE W A TER HEA TER WITH COLD
WATER INLET VALVE CLOSED.

NEVER OPERATE THE HEATER WITHOUT FIRST BEING
CERTAIN IT IS FILLED WITH WATER AND A TEMPERATURE
AND PRESSURE RELIEF VAL VE IS INST ALLED IN THE RELIEF
VALVE OPENING OF THE HEATER.

TO OPERATE THE HEA TER

1. Close the heater drain valve by turning handle clockwise
.

2. Open a nearby hot water faucet to permit the air in the system

to escape.

3. Fully open the cold water inlet pipe valve allowing the heater

and piping to be filled.

4. Close the hot water faucet as water starts to flow.

5. The heater is ready to be operated.

STEP F

CAUTION

THE "ON/OFF" SWITCH ON TOP OF THE UNIT SHOULD NOT
BE TURNED TO THE "OFF" POSITION UNLESS THE UNIT IS
BEING SERVICED.

16

FOR YOUR SAFETY READ BEFORE LIGHTING

WARNING: If you do not follow these instructions exactly, a fire or

explosion may result causing property damage, personal injury or loss
of life.

BEFORE OPERATING: ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED FROM ALL LINES.

A. This appliance does not have a pilot. It is equipped

with an ignition device which automatically lights the
burner. Do

B. BEFORE OPERATING smell all around the

appliance area for gas. Be sure to smell next to the
floor because some gas is heavier than air and will
settle on the floor.

WHAT TO DO IF YOU SMELL GAS:

• Do not try to light any appliance.

• Do not touch any electric 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.

NOT try to light the burner by hand.

• If you cannot reach your gas supplier, call the fire
department.

C. Use only your hand to push in the gas control

buttons. Never use tools. If the control buttons will
not push in, don’t try to repair them, call a qualified
service technician. Force or attempted repair may
result in a fire or explosion.

D. Do not use this appliance if any part has been

under water. Immediately contact a qualified
installer or service agency to replace a flooded
water heater. Do not attempt to repair the unit. It
must be replaced!

OPERA TING INSTRUCTIONS

5. This appliance is equipped with a device which
automatically lights the burner.
DO NOT TRY TO LIGHT THE BURNER BY HAND.

1. STOP! Read the safety information above
on this label.

2. Set the ON/OFF switch on the control box to the

"ON" position.

3. Set the thermostat to the lowest setting by first

pressing the COOLER
together and holding for 1 second. Then press the
COOLER
appears.

4. Set the ON/OFF switch on the control box to the

"OFF" position.

button until the warm indicator light

and HOTTER buttons

TO TURN OFF GAS TO APPLIANCE

6. Wait five (5) minutes to clear out any gas.
If you then smell gas, STOP! Follow "B"
in the safety information above on this label. If you
don't smell gas, go to the next step.

7. Turn on all electrical power to the appliance.

8. Set the ON/OFF switch on the control box to the
"ON" position.

9. Set the thermostat to the desired setting by first
pressing the COOLER
together and holding for 1 second. Then press the
HOTTER button.

10. WATER TEMPERATURE ADJUSTMENT
approximately 120°F.

CAUTION: Hotter water increases the risk
of scald injury. Consult the instruction
manual before changing temperature.

1 1. If the appliance will not operate, follow the instructions

"TO TURN OFF GAS T O THE APPLIANCE" and call
your technician or gas supplier.

WARNING: TURN OFF ALL ELECTRIC
POWER BEFORE SERVICING.

and HOTTER buttons

is

1. Set the thermostat to the lowest setting by first
pressing the COOLER and HOTTER
buttons together and holding for 1 second. Then
press the COOLER button until the warm
indicator light appears.

2. Set the ON/OFF switch on the control box to the
"OFF" position.

3. Turn off all electrical power to the appliance if service
is to be performed.

17

TEMPERA TURE REGULATION

CAUTION

THIS WA TER HEATER IS EQUIPPED WITH AN ADJUST ABLE
THERMOSTAT T O CONTROL WATER TEMPERATURE. HOT
WATER TEMPERATURES REQUIRED FOR AUTOMATIC
DISHWASHER AND LAUNDRY USE CAN CAUSE PAINFUL
SCALDING WITH POSSIBLE SERIOUS AND PERMANENT
INJURY. THE TEMPERATURE AT WHICH INJURY OCCURS
VARIES WITH THE PERSON'S AGE AND THE TIME OF
EXPOSURE. THE SLOWER RESPONSE TIME OF
CHILDREN, AGED OR DISABLED PERSONS INCREASES
THE HAZARDS TO THEM. NEVER ALLOW SMALL
CHILDREN TO USE A HOT W A TER T AP OR TO DRAW THEIR
OWN BATH W A TER. NEVER LEAVE A CHILD OR DISABLED
PERSON UNATTENDED IN A BATHTUB OR SHOWER.

1. "Wake Up" the temperature indicators by holding down both
the "COOLER" and "HOTTER" temperature adjustment
buttons at the same time for one second (see Figure 14).
One or two of the temperature indicators will light up.
These indicators will only remain on for 30 seconds if no
further buttons are pressed. After 30 seconds the control
will go back to "Sleep" mode.

2. Release both of the temperature adjustment buttons.

A. To decrease the temperature press and release the

"COOLER" button until desired setting is reached.

B. To increase the temperature press and release the

"HOTTER" button until the desired setting is reached.

NOTE: Holding down the button will not continue to lower or
raise the temperature setting. The button must be pressed
and released for each temperature change desired.

SHOULD OVERHEA TING OCCUR OR THE GAS SUPPLY FAIL
TO SHUT OFF, TURN OFF THE MAIN MANUAL GAS SHUTOFF
V ALVE TO THE APPLIANCE. SEE FIGURE 1 (G).

TEMPERATURE INDICA T ORS

THE WATER HEATER SHOULD BE LOCATED IN AN AREA
WHERE THE GENERAL PUBLIC DOES NOT HAVE ACCESS.

It is recommended that lower water temperatures be used to
avoid the risk of scalding. It is further recommended, in all
cases, that the water temperature be set for the lowest
temperature which satisfies your hot water needs. This will
also provide the most energy efficient operation of the water
heater. The water temperature adjustment was factory set at
the lowest temperature. Pressing the "COOLER"
decreases temperature and pressing the "HOTTER"

button

button

increases the temperature.

SETTING THE WATER HEATER TEMPERATURE AT 120°F
(APPROX. "
CONTROL) WILL REDUCE THE RISK OF SCALDS.

" MARK ON TEMPERATURE SETTING OF

Some

states require settings at specific lower temperatures.
Figure 14 shows the approximate water temperatures

produced at various thermostat settings. Short repeated
heating cycles caused by small hot water uses can cause
temperatures at the point of use to exceed the thermostat
setting by up to 20°F. If you experience this type of use you
should consider using lower temperature settings to reduce
scald hazards.

Valves for reducing the

point-of-use temperature by mixing
cold and hot water are available. See figure 2. Also available
are inexpensive devices that attach to faucets to limit hot water
temperatures.

Contact a licensed plumber or the local

plumbing authority.

TEMPERATURE ADJUSTMENT BUTTONS

Time to Produce

Temperature Setting Burns on Adult Skin

F = approx. 180°F (82°C) Nearly Instantaneous
E = approx. 170°F (77°C) Nearly Instantaneous
D = approx. 160°F (71°C) About 1/2 Second
C = approx. 150°F (65°C) About 1 1/2 Seconds
B = approx. 140°F (60°C) Less than 5 Seconds

B = approx. 130°F (54°C) More than 30 Seconds
= approx. 120°F (49°C) More than 5 Minutes

Display

B C D E F

2nd & 3rd Degree

FIGURE 14

MAINTENANCE

To avoid any unintentional changes in water temperature
settings, the control has a tamper resistant feature for
changing the temperature setting. To change the temperature
setting follow these instructions:

CAUTION

DISCONNECT FROM ELECTRICAL SUPPLY BEFORE
SERVICING UNIT. FOR YOUR SAFETY, WATER HEATER

18

SERVICE SHOULD BE PERFORMED ONLY BY A QUALIFIED
SERVICE TECHNICIAN. READ THE GENERAL SAFETY
INFORMA TION SECTION FIRST.

USERS OF THIS APPLIANCE SHOULD BE AWARE THAT GAS
COMPONENTS WEAR OUT OVER A PERIOD OF TIME. THE
GAS CARRYING COMPONENTS OF THIS APPLIANCE SHOULD
BE INSPECTED FOR PROPER OPERATION PERIODICALLY
BY A QUALIFIED SERVICE TECHNICIAN.

MAIN BURNER

Check main burner every 12 months for proper flame
characteristics. This is done by removing the outer door on heater,
Fig. 1. The main burner should provide complete combustion of
gas; ignite rapidly; give reasonably quiet operation; cause no
excessive flame lifting from burner ports. Make sure that the flow
of combustion and ventilation air is not blocked.

If proper flame characteristics are not evident, check for
accumulation of lint or other foreign material that restricts or blocks
the air openings in the heater or burner. Also check AIR
REQUIREMENTS.

WARNING

SOOT BUILD-UP INDICATES A PROBLEM THAT REQUIRES
CORRECTION BEFORE FURTHER USE. Consult with a qualified
service technician.

Should the main burner or burner air openings require cleaning,
turn the control switch to “OFF” position and allow the burner to
cool. Remove the burner and clean with a soft brush. Clean
main burner orifice with a suitable soft material.

T & P V ALVE

At least once a year, the temperature and pressure relief valve
must be checked to ensure that it is in operating condition. Lift
the lever at the top of the valve several times until the valve seats
properly and operates freely.

W ARNING

THE WATER PASSING OUT OF THE VALVE DURING THIS
CHECKING OPERATION MAY BE EXTREMELY HOT. AVOID
CONTACT AND DISCHARGE SAFELY TO PREVENT WATER
DAMAGE.

DRAINING

Periodically open the drain valve and allow the water to run until
it flows clean. This will help prevent sediment build-up in the
tank.

It is normal for lime and scale deposits to form within the tank and
on the heat exchanger surfaces. Such deposits will not be
removed by periodic draining. It is necessary to chemically delime
the affected parts in water areas where such deposits are
encountered. Contact your dealer or plumber for deliming
information.

If the heater is to be shut off and exposed to freezing temperatures,
it must be drained. Water , if left in the t ank and allowed to freeze,
will damage the heater.

• Turn off the gas and cold water inlet valve to the heater.

• Open a nearby hot water faucet and the heater drain valve.

HIGH TEMPERATURE LIMIT SWITCH

(Auto Reset Type Energy Cut-Off)
TO RESET AUT OMA TIC GAS SHUTOFF
This water heater is equipped with an automatic reset type high

limit (Energy Cutoff) sensor. The high limit switch interrupts the
main burner gas flow should the water temperature reach 205°F
(96°C). The high limit will automatically reset when the water
temperature drops below 140°F (60°C). After cooling the tank
temperature, turn off the water heater for at least 10 seconds by
using the switch on top of the unit. Turn on the water heater . If this
fails to correct the problem, contact your plumber or service
representative.

POWER VENTER MAINTENANCE

The unit must be inspected quarterly. Points of inspection are:

1. MOTOR - Motor must rotate freely. This is a sealed motor

and no oiling is required.

2. WHEEL - Wheel must be clean of soot, ash or any other

coating which inhibits either rotation or air flow. Remove all
foreign material from vent system before operating.

3. The pressure switch part inside the power venter must be

open and free from deposits of soot, carbon, etc.

For safety and satisfactory operation it is recommended that the
heater be checked once a year by a competent service person.

• BE CAREFUL TO GRASP THE DRAIN VALVE HANDLE SO
THAT THE HAND IS NOT EXPOSED TO HOT WATER. IF
DESIRED, A HOSE MAY BE CONNECTED TO THE DRAIN
V ALVE TO CARRY THE W ATER AWAY.

WARNING: The water CAN BE HOT.

The drain valve must be left open during the shutdown period.

• To restart heater, refer to the instructions under OPERATION.

CONDENSA TE INSIDE T ANK ASSEMBLY

Water vapor can condense on the cooler surfaces of the tank
forming droplets, these drip into the fire or run out on the floor.
This is common at the time of startup after installation, during
periods of time when incoming water is very cold, or the heater
may be undersized for the requirements.

Droplets from the bottom of the flue may be due to corrosive
combustion products or improper vent. Check with your dealer
for more information.

CA THODIC PROTECTION-ANODE

The anode rod is used to protect the tank from corrosion. Most
hot water tanks are equipped with an anode rod. The submerged
rod sacrifices itself to protect the tank. Instead of corroding the
tank, water ions attack and eat away the anode rod. This does
not affect the water’s taste or color. The rod must be maintained
to keep the tank in operating condition.

19

Anode deterioration depends on water conductivity, not
necessarily water condition. A corroded or pitted anode rod
indicates high water conductivity and should be checked and/or
replaced more often than an anode rod that appears to be intact.
Replacement of a depleted anode rod can extend the life of your
water heater. Inspection should be conducted by a qualified
technician, and at a minimum should be checked annually after
the warranty period.

Please be sure to provide the following information when
contacting us:

• Model Number

• Serial Number

• Date of Original Purchase

• Date Problem Originated

• Explanation of Problem

A hydrogen sulfide (rotten egg) odor may result if water
contains high sulfate and/or minerals. Chlorinating the
water supply should minimize the problem. (See
EXTENDED NON-USE PERIODS).

NOTE: Anode must remain installed (except for inspection)
to avoid shortening tank life. See LIMITED WARRANTY.
Replace as necessary.

SERVICE AND REPAIR

The water heater requires no special care other than the normal
maintenance as noted above. If you are having a problem
with your water heater, before calling for service please refer
to the following TROUBLESHOOTING sections. If service
becomes necessary, contact your dealer, installer or an
authorized service agent. Do not attempt to repair the water
heater yourself. Any work performed by unauthorized
personnel may void the warranty.

If you are having a problem with your water heater and
are not pleased with the service you received:

• First, please contact your dealer or the authorized
service agent in your area and explain to them why you
are not satisfied. This will usually correct the problem.

• If after working with your dealer or service agent the
problem has not been resolved to your satisfaction,
please let us know by either writing to us at:

A.O. Smith Water Products Company
Service Department
500 Tennessee Waltz Parkway
Ashland City, TN 37015-1299

or, going to our website at: www.hotwater.com
Please click on: "Contact us",
then click on: "Service"
and leave us a message
or call us at [phone].

Also, please be sure to include a daytime telephone number.

TROUBLE SHOOTING

Water heater may exhibit problems that are unrelated to a
malfunction of the water heater itself. The following information
and tables may serve to answer your question about a problem
that you are having without having to call a service agent.

For your safety, water heater service should be performed only by
a qualified service technician. Read the GENERAL SAFETY
INFORMA TION section first.

WATER HEA TING IGNITION SEQUENCE

(Make sure gas and electric power are connected properly)

1) The ignition control module is powered and monitors the system,
waiting for a call for heat from the thermostat.

2) The thermostat calls for heat by reading a resistance value within
a given range directly proportional to water temperature.

3) The Control Module:

a) Check the pressure switches for an open circuit.
b) Energizes the blower.
c) Checks the pressure switches for a closed circuit to prove

draft.

d) Sends line voltage to the hot surface igniter with a 20-second

warm up period.

e) Opens the gas valve and checks the sensing rod for flame.

4) The burner heats the water to the desired thermostat setting.

a) The resistance in the thermostat rises to the value selected

by the temperature control knob.

b) The control module closes the gas valve and 5 seconds

later, removes power from the blower.

5) Cycle is completed.

20

WARNING: DO NOT BY-P ASS ANY CONTROLS TO MAKE HEATER OPERATE. OPERATE ONLY AS WIRED FROM FACTORY.

TROUBLESHOOTING

For your safety, water heater service should be performed only by a qualified service technician.

Read the GENERAL SAFETY INFORMATION section first.

21

TROUBLE SHOOTING

Water heater may exhibit problems that are unrelated to a malfunction of the water heater itself. The following information and t ables
may serve to answer your question about a problem that you are having without having to call a service agent.

WARNING: DO NOT BY -PASS ANY CONTROLS TO MAKE HEA TER OPERATE. OPERA TE ONLY AS WIRED FROM F ACT ORY.

TROUBLE SHOOTING GUIDE

Please check guidelines below. For your safety, water heater service should be performed only by a qualified service technician.
Read the GENERAL SAFETY INFORMATION section first.

LED ST ATUS

B C D E F

B C D E F

B C D E F

B C D E F

B C D E F

B C D E F

PROBLEM SOLUTION

An open earth ground circuit to the 1. Check that the earth ground connection is
ignition system. properly connected.

2. Check that the ground conductor on the
water heater is properly connected.

Wiring error or a high resistance to 1. Check for proper connection of line
earth ground. neutral and hot wires.

2. Check that the water heater is securely
connected to earth ground.

Pressure switch remained closed longer 1. Pressure switch wiring is incorrect.
than 5 seconds after the call for 2. Replace pressure switch.
heat began.

Pressure switch remained open longer 1. Pressure switch wiring is incorrect.
than 5 seconds after the combustion 2. Pressure switch tubing not connected
blower was energized. correctly.

3. Air intake or exhaust obstructed.

Error in the hot surface ignitor circuit. 1. Check that all wiring is correct and secure.

2. Replace hot surface ignitor.

System in lockout. 1. Gas supply is off or too low to operate.

2. Hot surface ignitor not positioned
correctly.

3. Low voltage to the water heater.

4. Electric polarity to unit is incorrect - test
and correct.

B C D E F

WATER HEATER CONTROL

B C D E F

B C D E F

B C D E F

B C D E F

B C D E F

B C D E F

Problem in the gas valve driver circuit. 1. Turn power to the water heater off for

10 seconds and then back on.

2. Replace gas control valve.

Problem with the internal circuit. 1. Turn power to the water heater off for

10 seconds and then back on.

2. Replace gas control valve.

Problem with the internal circuit. 1. Turn power to the water heater off for

10 seconds and then back on.

2. Replace gas control valve.

Flame signal sensed out of 1. Replace gas control valve.
proper sequence.

1. Turn the power to the water heater off. Flow

ECO activated. water through the water heater until the

temperature drops below 140°F. Turn the
power to the water heater back on.

2. Replace gas control valve.

One of the temperature adjust 1. Press and release each of the buttons once.
buttons stuck closed. 2. Replace gas control valve.

Water temperature sensor is 1. Check that all wiring is correct and secure.
either open or short circuited. 2. Replace gas control valve.

22

Limited Warranty

A. O. Smith Corporation, the warrantor, extends the following LIMITED WARRANTY to the owner of this water heater.

1. THE T ANK
If the glass-lined tank in this water heater shall prove upon examination by the warrantor to have leaked due to natural corrosion from potable water
therein, during the first THREE years after initial installation, the warrantor will supply a complete new A. O. Smith water heater of equivalent size and
current model. Some government agencies are requiring energy efficient standards for water heaters. In the event regulations prohibit sale of a

model of equivalent size and construction, A. O. Smith will provide a model which complies with the regulations of your area, in which case the
consumer will be charged the difference in price between the like replacement and the energy efficient model required. The warranty on the
replacement water heater will be limited to the unexpired term of the original warranty.

2. ALL OTHER P ARTS
If within ONE year after initial installation of this water heater, any part or portion shall prove upon examination by the warrantor to be defective in
material or workmanship, the warrantor will repair or replace such part or portion at its option.

3. CONDITIONS AND EXCEPTIONS
This warranty shall apply only when the water heater is installed in accordance with local plumbing and building codes, ordinances and regulations,
the printed instructions provided with it and good industry practices. In addition, a temperature and pressure relief valve, certified by and officially
sanctioned and recognized independent testing agency and approved by the American Society of Mechanical Engineers, must have been installed.
a. This warranty shall apply only when the heater is:

(1) used at temperatures not exceeding the maximum calibrated setting of its thermostat;
(2) used at water pressure not exceeding the working pressure shown on the heater;
(3) filled with potable water, free to circulate at all times and with the tank free of damaging water sediment or scale deposits;

(4) used in a non-corrosive and non-contaminated atmosphere;
(5) used with factory approved anode(s) installed;
(6) in its original installation location;
(7) in the United States, its territories or possessions;
(8) sized in accordance with proper sizing techniques for commercial and/or residential water heaters;
(9) bearing a rating plate which has not been altered, defaced or removed, except as required by the warrantor;

(10) used in an open system or in a closed system with properly sized and installed thermal expansion tank;

(11) operated with properly installed dirt leg;
(12) fired with the fuel for which it was factory built;
(13) fired at the factory rated input;
(14) operated with the inner and outer combustion chamber doors in place.

b. Any accident to the water heater, any misuse, abuse (including freezing or thermal expansion damage) or alteration of, any operation in a

modified form, or any attempt to repair tank leaks will void this warranty.

c. This warranty is void if a device acting as a backflow prevention device (check valves etc.) is installed in the cold water supply the heater is

connected to, unless an effective method of controlling thermal expansion is also installed at the heater(s) and operational at all times. The relief
valve installed on the heater is not an acceptable method.

4. SERVICE AND REPAIR EXPENSES
Under the limited warranty the warrantor will provide only a replacement water heater or part thereof. The owner is responsible for all other costs.
Such costs may include but are not limited to:
a. Labor charges for service removal, repair or reinstallation of the water heater or any component part;
b. Shipping, delivery, handling, and administrative charges for forwarding the new heater or replacement part from the nearest distributor and

returning the claimed defective heater or part to such distributor.

c. All cost necessary or incidental for any material and/or permits required for installation of the replacement heater or part.

5. LIMITATIONS ON IMPLIED WARRANTIES
Implied warranties, including the warranty of merchantability imposed on the sale of this heater under state law are limited to one (1) year duration for
the heater or any of its parts. Some st ates do not allow limitation on how long an implied warranty lasts, so the above limit ation may not apply to you.

6. CLAIM PROCEDURE
Any claim under the warranty should be initiated with the dealer who sold the heater, or with any other dealer handling the warrantor’s products. If this

is not practicable, the owner should contact:

a. The warrantor will only honor replacement with identical or similar water heater or parts thereof which are manufactured or distributed by the

warrantor.

b. Dealer replacements are made subject to in-warranty validation by warrantor.

7. DISCLAIMERS
NO OTHER EXPRESS WARRANTY HAS BEEN OR WILL BE MADE IN BEHALF OF THE WARRANTOR WITH RESPECT TO THE MERCHANT­ABILITY OF THE HEATER OR THE INSTALLATION, OPERATION, REPAIR OR REPLACEMENT OF THE HEATER. THE WARRANTOR SHALL

NOT BE RESPONSIBLE FOR WATER DAMAGE, LOSS OF USE OF THE UNIT, INCONVENIENCE, LOSS OR DAMAGE TO PERSONAL PROP­ERTY OR OTHER CONSEQUENTIAL DAMAGE. THE WARRANTOR SHALL NOT BE LIABLE BY VIRTUE OF THIS WARRANTY OR OTHER­WISE FOR DAMAGE TO ANY PERSONS OR PROPERTY, WHETHER DIRECT OR INDIRECT, AND WHETHER ARISING IN CONTRACT OR IN
TORT.
a. Some states do not allow the exclusion or limitation of the incidental or consequential damage, so the above limitations or exclusions may not

apply to you.

b. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

Fill in the following for your own reference. Keep it. Registration is not a condition of warranty. The model and serial number are found on the heater’s
rating plate.

Model No. ____________________Serial No. _____________________________________________Date Installed__________________________
Dealer’s Name____________________________________________________________________________________________________________
Dealer’s Address ________________________________________________________________________ Phone No.________________________
City and State __________________________________________________________________________ Zip _____________________________

U.S. Customers
A. O. Smith Water Products Company
500 Tennessee Waltz Parkway
Ashland City, TN 37015
Telephone: [phone]

KEEP THIS WARRANTY POSTED ADJACENT TO THE HEATER FOR FUTURE REFERENCE.

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