Full Text Searchable PDF User Manual
1
GAS
Thank you for buying this energy efficient water heater from
A.O. Smith Water Products Company. 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 WARNINGS and CAUTIONS.
CAUTION
TEXT PRINTED OR OUTLINED IN RED CONTAINS
INFORMATION RELATIVE TO YOUR SAFETY.
PLEASE READ
THOROUGHLY BEFORE
INSTALLING AND USING THIS APPLIANCE.
PART NO. 183390-000
SUPERSEDES PART NO. 183285-000
PRINTED IN U.S.A. 2460 1299
KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE
WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.
RESIDENTIAL
GAS WATER HEATERS
OWNER'S MANUAL
A DIVISION OF A.O. SMITH CORPORATION
www.hotwater.com
GET TO KNOW YOUR WATER HEATER
2
GENERAL SAFETY INFORMATION
3
INSTALLATION
4 -6
OPERATION
6 -8
MAINTENANCE AND
TROUBLESHOOTING
8 -10
WARRANTY
11
TABLE OF CONTENTS
PAGE
2
GAS MODELS
GET TO KNOW YOUR WATER HEATER
FIGURE 1
REPLACEMENT PARTS AND DELIMING PRODUCTS
Replacement parts and recommended delimer may be ordered
through authorized servicers or distributors. Refer to the Yellow
Pages for where to call or contact A.O. Smith Water Products
Company, 5621 W. 115th Street, Alsip, Illinois 60803, 1-800-433-
2545. When ordering parts, provide complete model and serial
numbers (see rating plate), quantity and name of part desired (as
listed in Figure 1). Standards hardware items may be purchased
locally.
(A)
VENT PIPE
(B)
DRAFT HOOD
(C) ANODE
(D) HOT WATER
OUTLET
(E)
OUTLET
(F)
INSULATION
(G) GAS SUPPLY
(H) MANUAL GAS SHUT
OFF VALVE
(J)
GROUND JOINT UNION
(K)
DIRT LEG
(L)
HINGED INNER DOOR
(M) OUTER DOOR
(N) UNION
(O) INLET WATER SHUT OFF
VALVE
(P)
COLD WATER INLET
(Q) INLET DIP TUBE
(R) TEMPERATURE AND
PRESSURE RELIEF VALVE
(S)
RATING PLATE
(T)
FLUE BAFFLE
(U) THERMOSTAT
(V)
DRAIN VALVE
(W) PILOT AND MAIN BURNER
(X)
FLUE
(Y)
DRAIN PAN
(Z)
THERMOSTAT SHIELD
(OPTIONAL)
DIRTLEG AS
REQUIRED
BY LOCAL CODE
INSTALL THERMAL EXPANSION
TANK IF CHECK VALVE OR
PRESSURE REDUCING VALVE
IS USED IN SUPPLY
(W)
PILOT &
MAIN BURNER
3
pected, 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.
IF YOU EXPERIENCE AN OUT-OF-GAS SITUATION, DO NOT TRY
TO RELIGHT APPLIANCES YOURSELF. Ask your LP delivery per-
son to relight pilots for you. Only trained LP professional should
conduct the required safety checks in accordance with industry stan-
dards.
EXTENDED NON-USE PERIODS
WARNING
HYDROGEN GAS CAN BE PRODUCED IN A HOT WATER SYS-
TEM SERVED BY THIS HEATER THAT HAS NOT BEEN USED
FOR A LONG PERIOD OF TIME (GENERALLY TWO WEEKS OR
MORE). HYDROGEN GAS IS EXTREMELY FLAMMABLE.
To re-
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 flooded it must be replaced.
CHEMICAL VAPOR CORROSION
WARNING
CORROSION OF THE FLUEWAYS AND VENT SYSTEM MAY
OCCUR IF AIR FOR COMBUSTION CONTAINS CERTAIN CHEMI-
CAL 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. (Reference
is made to the limited warranty for complete terms and conditions).
IMPROPER COMBUSTION
WARNING
ATTIC AND/OR EXHAUST FANS OPERATING ON THE PREMISES
WITH A WATER HEATER CAN RESULT IN CARBON MONOXIDE
POISONING AND DEATH.
OPERATION OF THESE FANS CAN PRODUCE A NEGATIVE
DRAFT IN THE AREA OF THE WATER HEATER PREVENTING
THE PRODUCTS OF COMBUSTION FROM EXHAUSTING
THROUGH THE CHIMNEY OR VENT PIPE.
The venting of the water heater should be inspected by a qualified
service technician at the time of installation and periodically thereaf-
ter to ensure a down-draft condition does not exist.
DO NOT OBSTRUCT THE FLOW OF COMBUSTION AND VENTI-
LATING AIR. ADEQUATE AIR FOR COMBUSTION AND VENTI-
LATION MUST BE PROVIDED FOR SAFE OPERATION.
LIQUID PETROLEUM MODELS
Water heaters for propane or liquefied petroleum gas (LPG) are dif-
ferent from natural gas models. A natural gas heater will not func-
tion safely on LP gas and no attempt should be made to convert a
heater from natural gas to LP gas.
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 sus-
duce 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.
THERE SHOULD BE NO SMOKING OR
OPEN FLAME NEAR THE FAUCET AT THE TIME IT IS OPEN.
INSULATION BLANKETS
Insulation blankets available to the general public for external use
on gas water heaters are not necessary with A. O. Smith products.
The purpose of an insulation blanket is to reduce the standby heat
loss encountered with storage tank heaters. Your A. O. Smith water
heater meets or exceeds the National Appliance Energy Conserva-
tion Act standards with respect to insulation and standby loss re-
quirements, 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.
•
Do not apply insulation to the top of the water heater, as this
will interfere with safe operation of the draft hood.
•
Do not cover the outer door, thermostat or temperature &
pressure
relief valve.
•
Do not allow insulation to come within 2" of the floor to prevent
blockage of combustion air flow to the burner.
•
Do not cover the instruction manual. Keep it on the side of the
water heater or nearby for future reference.
•
Do obtain new warning and instruction labels from A.O. Smith
for placement on the blanket directly over the existing labels.
•
Do inspect the insulation blanket frequently to make certain it
does notsag, thereby obstructing combustion air flow.
GENERAL SAFETY
INFORMATION
4
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, venti-
lation, and draft hood dilution must be obtained from outdoors. The
installation instructions for confined spaces must be followed.
CONFINED SPACE
When drawing combustion and dilution air from inside a conven-
tionally constructed building to a confined space, such a space shall
be provided with two permanent openings. ONE IN OR WITHIN 12
INCHES OF THE ENCLOSURE TOP AND ONE IN OR WITHIN 12
INCHES OF THE ENCLOSURE BOTTOM. Each opening shall have
a free area of at least one square inch per 1000 Btuh 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, ventilation and draft hood dilution 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 Btuh 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 Btuh of the total input of all appliances in the
enclosure.
CAUTION
In cold climates provide protection against freeze-up. THE HEATER
SHOULD BE LOCATED IN AN AREA WHERE LEAKAGE OF THE
TANK OR CONNECTIONS WILL NOT RESULT IN DAMAGE TO
THE AREA ADJACENT TO THE HEATER OR TO LOWER FLOORS
OF THE STRUCTURE.
When such locations cannot be avoided,
INSTALLATION
REQUIRED ABILITY
INSTALLATION OR SERVICE OF THIS WATER HEATER RE-
QUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED
TRADESMAN IN THE FIELD INVOLVED. PLUMBING, AIR SUP-
PLY, VENTING AND GAS SUPPLY ARE REQUIRED.
GENERAL
The installation must conform to these instructions and the local
code authority having jurisdiction. In the absence of local codes,
the installation must comply with the latest editions of the National
Fuel Gas Code, ANSI Z223.1/NFPA 54. The code is available from
the Canadian Standards Association, 8501 East Pleasant Valley
Road, Cleveland, OH 44131.
LOCATION OF HEATER
The heater is design certified by the American Gas Association for
installation on combustible flooring in a closet having minimum clear-
ances from combustible material of: 0" clearance from sides and
rear, 4" from the front and 12" from the top. (Standard clearance.) If
clearances stated on the heater differ from standard clearances,
install water heater according to clearances stated on heater.
A minimum clearance of 4" must be allowed for access to replace-
able parts such as the thermostats, drain valve and relief valve.
Adequate clearance for servicing this appliance should be consid-
ered before installation, such as changing the anodes, etc. Mini-
mum clearances for proper operation are given above.
When installing the heater, consideration must be given to proper
location. Location selected should be as close to the stack or chim-
ney as practicable with adequate air supply and as centralized with
the water piping system as possible.
WARNING
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 your local dealer, wholesaler,
public utilities or California's Office of the State Architect, 400 P
Street, Sacramento, CA 95814.
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 latest edition of National Fuel Gas Code ANSI Z223.1
recommends using figures of 20-25 percent free area for wood lou-
vers or 60-75 percent for metal grills or louvers.
UNCONFINED SPACE
In buildings of conventional frame, brick or stone construction, un-
confined spaces may provide adequate air for combustion, ventila-
tion, and draft hood dilution.
Installation:
Do not install water heater
where flammable products will
be stored or used unless the
main burner and pilot flames are
at least 18" above the floor. This
will reduce, but not eliminate, the
risk of vapors being ignited by
the main burner or pilot flame.
5
a suitable drain pan should be installed under the heater, see fig.
1 (Y). The pan must not restrict combustion air flow. Such pans
should have a minimum length and width of at least 2 inches
greater than the diameter of the heater and should be piped to an
adequate drain. Drain pans suitable for these heaters are avail-
able from your dealer or A. O. Smith Water Products Company,
5621 W. 115th Street, Alsip, Illinois 60803.
WARNING
DO NOT INSTALL THIS WATER HEATER DIRECTLY ON A CAR-
PETED FLOOR. A FIRE HAZARD MAY RESULT.
Instead the wa-
ter heater must be placed on a metal or wood panel extending be-
yond the full width and depth by at least 3 inches (76.2mm) in any
direction. If the heater is installed in a carpeted alcove or closet,
the entire floor shall be covered by the panel. Also, see the drain
requirements.
WATER CONNECTIONS
Refer to figure 1 for typical installation. A suitable pipe thread seal-
ant must be used to prevent leakage. For WATER HEATING (PO-
TABLE) and SPACE HEATING, figure 2.
WATER (POTABLE) HEATING AND
SPACE HEATING
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.
3.
This unit may NEVER be connected to any existing heating
system or component(s) previously used with a non-potable
water heating appliance
.
FIGURE 2
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.
CLOSED WATER 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 expan-
sion 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 dis-
charges 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 4.5" W.C.
for natural gas (11.0" W.C. for propane).
THE HEATER IS NOT INTENDED FOR OPERATION AT HIGHER
THAN 14.0"-NATURAL, 14.0"-PROPANE WATER COLUMN (1/2
POUND PER SQUARE INCH [3.5 kPa]) SUPPLY PRESSURE. EX-
POSURE TO HIGHER GAS SUPPLY PRESSURE MAY CAUSE
DAMAGE TO THE CONTROL WHICH COULD RESULT IN FIRE
OR EXPLOSION.
If overpressure has occurred such as through
improper testing of gas lines or emergency malfunction of the sup-
ply 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. Vent blockage may occur during
ice storms.
IT IS IMPORTANT TO GUARD AGAINST CONTROL FOULING
FROM CONTAMINANTS IN THE GAS WAYS. SUCH FOULING
MAY CAUSE IMPROPER OPERATION, FIRE OR EXPLOSION.
All piping must comply with local codes and ordinances or with the
National Fuel Gas Code (ANSI Z2223.1/NFPA-54) whichever ap-
plies. Copper and brass tubing and fittings (except tin lined copper
tubing) shall not be used.
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 SUP-
PLY LINE, A DIRT LEG (SOMETIMES CALLED DRIP LEG) MUST
BE INCORPORATED IN THE PIPING, FIG. 1.
The dirt leg must be
readily accessible. Install in accordance with recommendations of
serving gas supplier. Refer to the latest 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 ther-
mostat 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.
DISCONNECT THE APPLIANCE AND ITS INDIVIDUAL SHUT OFF
VALVE FROM THE GAS SUPPLY 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 ISOLATED FROM THE SUPPLY PRESSURE TEST
BY CLOSING THE MAIN MANUAL GAS VALVE.
6
PIPE INSULATION - INSTALLATION
(SELECTED MODELS)
1. Remove pipe insulation from carton.
2. Fit pipe insulation over the incoming cold water
line and the hot water line. Make sure that the insulation is
against top cover of heater.
FIGURE 3
OPERATION
NEVER OPERATE THE HEATER WITHOUT FIRST BEING CER-
TAIN IT IS FILLED WITH WATER AND A TEMPERATURE AND
PRESSURE RELIEF VALVE IS INSTALLED IN THE RELIEF VALVE
OPENING OF THE HEATER. DO NOT ATTEMPT TO OPERATE
HEATER WITH COLD WATER INLET VALVE CLOSED.
FILLING
1. Close the heater drain valve by turning handle clockwise ,Fig.1
(V) .
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 , Fig.1(O).
4. Close the hot water faucet as water starts to flow.
5. The heater is ready to be operated.
HIGH ALTITUDE INSTALLATION
WARNING
IINSTALLATIONS ABOVE 4000 FT. REQUIRE REPLACEMENT OF
THE BURNER ORIFICE IN ACCORDANCE WITH THE 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 INJURY OR DEATH. CONTACT YOUR GAS
SUPPLIER FOR ANY SPECIFIC CHANGES WHICH MAY BE
REQUIRED IN YOUR AREA.
A.O. SMITH DOES BUILD SOME MODELS SPECIFICALLY FOR
HIGH ALTITUDE SERVICE.
PLEASE CHECK THE RATING PLATE BEFORE MAKING
CHANGES.
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 IGNI-
TION TO LOCATE GAS LEAKS.
DRAFT HOOD
THE DRAFT HOOD INCLUDED WITH THE HEATER MUST BE
INSTALLED PROPERLY FOR SAFE OPERATION.
Locate draft hood as seen in figure 1. Remove the two draft hood
screws from top of heater located just outside of the flue tube open-
ing. Position draft hood over the flue tube. Align the two holes in
the draft hood legs with the screw holes in the top of heater. Insert
the tabbed draft hood legs into the corresponding tab holes. Screw
the draft hood down using the included draft hood screws.
When installing vent piping, secure the vent pipe to the draft hood
using at least three sheet metal screws in the draft hood outlet.
VENTING
THE HEATER WITH DRAFT HOOD INSTALLED AS SHOWN IN
FIG. 1 MUST BE CONNECTED TO A CHIMNEY OR GAS VENT.
The vent pipe from the heater to the chimney must not be smaller
than the outlet of the draft hood on the heater and should slope
upward to the chimney at least 1/4 inch per foot. Do not extend vent
pipe beyond the inside wall of the chimney.
For proper venting in certain installations, a field installed increased
size vent connector and pipe size may be needed. Consult vent
tables in the latest edition of the National Fuel Gas Code ANSI Z
223.1
WARNING
NEVER OPERATE THE HEATER UNLESS IT IS VENTED TO THE
OUTDOORS AND HAS ADEQUATE AIR SUPPLY TO AVOID RISKS
OF IMPROPER OPERATION, FIRE, EXPLOSION OR ASPHYXIA-
TION.
RELIEF VALVE (R)-FIG. 1
A NEW TEMPERATURE AND PRESSURE RELIEF VALVE COM-
PLYING WITH THE STANDARD FOR RELIEF VALVES AND AU-
TOMATIC GAS SHUT OFF DEVICES FOR HOT WATER SUPPLY
SYSTEMS, ANSI Z21.22 (LATEST EDITION) MUST BE INSTALLED
IN THE HEATER IN THE MARKED OPENING PROVIDED. THE
VALVE MUST BE OF A SIZE (INPUT RATING) THAT WILL BE AD-
EQUATE 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 the 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 capac-
ity of the relief valve shall not be less than the input rating of the
heater.
NO VALVE IS TO BE PLACED BETWEEN THE RELIEF
VALVE AND TANK. DO NOT PLUG THE RELIEF VALVE.
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 dis-
charge line shall be installed in a manner to allow complete drain-
age of both the valve and line.
DO NOT THREAD, PLUG OR CAP
THE END OF THE DRAIN LINE.
7
FOR YOUR SAFETY READ BEFORE LIGHTING
LIGHTING INSTRUCTIONS
WARNING:
If you do not follow these instructions exactly, a fire or explosion
may result causing property damage, personal injury or loss of
life.
• If you cannot reach your gas supplier, call the
fire department.
C. Use only your hand to push in or turn the gas
control knob. Never use tools. If the knob will
not push in or turn by hand, don’t try to repair
it, call a qualified service technician. Force or
attempted repair may result in a fire or
explosion.
D. Do not use this appliance if any part has been
under water. Immediately call a qualified
service technician to inspect the appliance and
to replace any part of the control system and
any gas control which has been under water.
A. This appliance has a pilot which must be lighted
by hand. When lighting the pilot, follow these
instructions exactly.
B. BEFORE LIGHTING smell all around the
appliance area for gas. Be sure to smell next to
the floor because some gas is heavier than air
and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electric switch;
do not use any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas suppliers
instructions.
TOP KNOB
BEFORE OPERATING: ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED FROM ALL LINES.
1.
STOP! Read safety information above
on this label.
2. Set the thermostat to lowest setting. Turn
thermostat dial fully clockwise
until it stops.
3. Push in gas control knob slightly and turn
clockwise
to “OFF”. SEE FIGURE ‘A’.
NOTE: Knob cannot be turned from “PILOT” to
“OFF” unless knob is pushed in slightly. Do not
force.
4. 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 next step.
5. Remove the inner and outer burner doors
located below and behind the gas control unit.
6. Find Pilot–Follow metal tube from gas control.
The pilot is between the burner tube and the
thermocouple, behind the burner access doors.
SEE FIGURE ‘D’.
7. Turn knob on gas control counter clockwise
to “PILOT”. SEE FIGURE ‘B’.
8. Push in control knob all the way and hold in.
Immediately light the pilot with a match.
Continue to hold the control knob in for about
(1) minute after the pilot is lit. Release knob
and it will pop back up. Pilot should remain lit.
If it goes out, repeat steps 3 through 8. It may
take several seconds for air to clear the lines
before the pilot will light.
• If knob does not pop up when released, stop
and immediately call your service technician
or gas supplier.
• If the pilot will not stay lit after several tries,
turn the gas control knob clockwise
to
“OFF” and call your service technician or gas
supplier. SEE FIGURE ‘A’.
9. Replace inner and outer burner doors.
10. At arm’s length away, turn gas control knob
counter clockwise
to “ON”. SEE FIGURE
‘C’.
11. Set thermostat to desired setting. (SEE
FIGURE)
CAUTION: Hotter water increases
the risk of scald injury. Consult the
instruction manual before changing
temperature.
FIGURE ‘D’
TO TURN OFF GAS TO APPLIANCE
1. Set the thermostat to lowest setting.
2. Push in gas control knob slightly and turn
clockwise
to “OFF”. SEE FIGURE ‘A’.
Do not force.
8
DRAFT HOOD OPERATION
Check draft hood operation by performing a worst case depressur-
ization of the building. With all doors and windows closed, and with
all air handling equipment and exhaust fans operating, such as fur-
naces, clothes dryers, range hoods and bathroom fans, a match
flame should still be drawn into the draft hood of the water heater
with its burner firing. If the flame is not drawn toward the draft hood,
shut off water heater and make necessary air supply changes to
correct.
TEMPERATURE REGULATION
DANGER
THIS WATER HEATER IS EQUIPPED WITH AN ADJUSTABLE
THERMOSTAT TO CONTROL WATER TEMPERATURE. HOT
WATER TEMPERATURES REQUIRED FOR AUTOMATIC DISH-
WASHER AND LAUNDRY USE CAN CAUSE PAINFUL SCALD-
ING 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 OF CHILDREN, AGED OR DISABLED PERSONS IN-
CREASES THE HAZARDS TO THEM. NEVER ALLOW SMALL
CHILDREN TO USE A HOT WATER TAP, OR TO DRAW THEIR
OWN BATH WATER. NEVER LEAVE CHILD OR DISABLED PER-
SON UNATTENDED IN A BATHTUB OR SHOWER.
THE WATER HEATER SHOULD BE LOCATED IN AN AREA
WHERE THE GENERAL PUBLIC DOES NOT HAVE ACCESS. IF A
SUITABLE AREA IS NOT AVAILABLE, A COVER SHOULD BE
INSTALLED OVER THE THERMOSTAT TO PREVENT
TAMPERING.
Suitable covers are available through A.O. Smith
Water Products Company, 5621 w. 115th Street, Alsip, IL 60803.
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 dial, Figure 1, be set for the lowest temperature
which satisfies your hot water needs. This also will provide the
most energy efficient operation of the water heater. The water tem-
perature adjusting dial was factory set at the lowest temperature;
all the way clockwise to the mechanical stop. Turning the dial coun-
terclockwise
increases temperature, and clockwise
reduces temperature.
SETTING THE WATER HEATER TEMPERATURE AT 120°F
(APPROX.
MARK ON FACE OF THERMOSTAT) WILL REDUCE
THE RISK OF SCALDS.
Some states require settings at specific
lower temperatures.
Figure 4 shows the approximate water temperatures produced at
various thermostat dial 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 30°F. If you
experience this type of use you should consider using lower tem-
perature settings to reduce scald hazards.
Time to Produce 2nd & 3rd
Temperature Setting
Degree Burns on Adult Skin
VERY HOT = approx. 160°F
About 1/2 second
C = approx. 150°F
about 1-1/2 seconds
B = approx. 140°F
Less than 5 seconds
A = approx. 130°F
About 30 seconds
= approx. 120°F
More than 5 minutes
LOW =approx. 80°F
- - - - - - - - - - - - - - - -
FIGURE 4
Valves for reducing the point-of-use temperatures by mixing cold
and hot water are available (See fig.2) . Also available are inexpen-
sive devices that attach to faucets to limit hot water temperatures.
Contact a licensed plumber or the local plumbing authority.
SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL
TO SHUT OFF, TURN OFF THE MAIN MANUAL GAS SHUTOFF
VALVE TO THE APPLIANCE. SEE FIGURE 1 (H).
MAINTENANCE
FOR YOUR SAFETY, WATER HEATER SERVICE SHOULD BE
PERFORMED ONLY BY A QUALIFIED SERVICE TECHNICIAN.
READ THE GENERAL SAFETY INFORMATION 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.
PILOT AND MAIN BURNER
Check pilot and main burner every 12 months for proper flame
characteristics. This is done by removing door(s) 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 accumula-
tion of lint or other foreign material that restricts or blocks the air
openings in the heater or burner. Also check AIR REQUIRE-
MENTS.
9
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 gas control knob 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.
HIGH TEMPERATURE LIMIT SWITCH
(Single-Use Type Energy Cut Off)
The thermostat has a built-in limit switch which will extinguish the
pilot light in case of excessive water temperatures. The pilot cannot
be relit until the entire thermostat (labeled as single-use type) is
replaced. It is important that a serviceman be called to determine
the reason for limit operation and thus avoid repeated thermostat
replacement. Lower the temperature adjustment dial setting on new
control.
VENTING SYSTEM
HAVE VENTING SYSTEM CHECKED EVERY TWELVE MONTHS
FOR OBSTRUCTIONS AND/OR DETERIORATION IN VENT PIP-
ING.
T & P VALVE
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.
WARNING
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
If the heater is to be shut off and exposed to freezing temperatures,
it must be drained. Water, if left in the tank 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
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 VALVE TO CARRY
THE WATER AWAY.
DANGER: The water CAN BE HOT.
• The drain valve must be left open during the shutdown period.
• To restart heater, refer to the FILLING instructions under
OPERATION.
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. 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.
CONDENSATION
Water vapor can condense on the cooler surfaces of the tank form-
ing 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 under-
sized for the requirements.
If water drops fall from the draft hood, it is water vapor condensed
from combustion products due to a problem in the vent. It may also
be the result of leaking rain water.
Droplets from the bottom of the flue may be due to corrosive com-
bustion products or improper vent. Check with your dealer for more
information.
CATHODIC PROTECTION-ANODE
The anode rod with the tank is designed to be slowly consumed
cathodically, minimizing corrosion in the glass lined tank. 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.
ANODE ROD MAINTENANCE
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. Failure to inspect and/or replace the
anode rod will result in voiding the warranty.
Anode deterioration depends on water conductivity, not necessarily
water condition. It may be necessary to have the anode rod in-
spected a few times during the first year to see what effect the water
has had. A corroded or pitted anode rod, in the first year, indicates
high water conductivity and should be checked and or replaced more
often than an anode rod that appears to be fairly clean. Inspection
should be conducted by a qualified technician.
10
PROBLEM
CAUSE
SOLUTION
Improperly sealed, hot or cold supply connections,
relief valve, drain valve or thermostat threads.
Leakage from other appliances or water lines.
Condensation of flue products.
Thermal expansion in closed water system.
Improperly seated valve.
High sulfate or mineral content in water supply.
Bacteria in water supply.
Dirty pilot burner.
Thermocouple tip is not in contact with pilot flame.
Thermocouple malfunction.
Thermocouple malfunction.
Gas knob dial not positioned correctly.
Pilot orifice clogged.
Pinched or clogged pilot tube.
Main gas supply off.
Heater not lit or thermostat not on.
Thermostat set too low.
Heater undersized.
Low gas pressure.
Incoming water is unusually cold.
Leaking hot water pipes or fixtures.
High temperature limit switch activated.
Thermostat set too high.
Condensation dripping on burner.
Sediment at bottom of heater tank.
Improper combustion
Tighten threaded connections.
Inspect other appliances near water heater.
Refer to CONDENSATION.
Install thermal expansion tank (DO NOT plug T & P valve).
Check relief valve for proper operation (DO NOT plug T & P valve).
Drain and flush heater thoroughly, then refill.
Chlorinate water supply.
Clean pilot assembly.
Insert thermocouple correctly.
Replace thermocouple.
Check thermostat.
Refer to LIGHTING INSTRUCTIONS.
Clean or replace pilot orifice.
Replace pilot tube.
Turn on main gas shutoff valve.
Refer to LIGHTING INSTRUCTIONS.
Refer to TEMPERATURE REGULATION
Reduce hot water use.
Contact dealer.
Allow more time for heater to re-heat.
Have plumber check and repair leaks.
Contact dealer to determine cause. See HIGH TEMPERATURE LIMIT SWITCH note below.
Refer to HIGH TEMPERATURE REGULATION
Refer to CONDENSATION above.
Clean sediment from tank. Refer to DRAINING instructions in Maintenance section of manual.
Refer to AIR REQUIREMENTS on page 4.
WATER LEAKS
LEAKING T & P
HOT WATER ODORS
(Refer to CATHODIC PROTECTION,)
PILOT OUTAGE
PILOT WILL NOT LIGHT
NOT ENOUGH OR NO HOT WATER
WATER TOO HOT
WATER HEATER SOUNDS:
SIZZLING·RUMBLING
SOOTING
TROUBLESHOOTING
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.
11
LIMITED RESIDENTIAL GAS WARRANTY
THIS WARRANTY IS APPLICABLE TO THE ORIGINAL OWNER ONLY.
If the glass lined tank in this water heater shall prove upon examination by
A. O. Smith Corporation (the warrantor) to have leaked during the warranty
period in normal residential use, due to natural corrosion from potable water
therein, the warrantor will furnish the ORIGINAL OWNER a replacement
A. O. Smith water heater of equivalent size and current model, or a
replacement part for any thermostat or thermocouple which fails in normal
use, in accordance with the warranty terms and conditions specified below.
THE A. O. SMITH REPLACEMENT MODEL OR PART WILL BE
WARRANTED FOR ONLY THE UNEXPIRED PORTION OF THE
ORIGINAL WARRANTY. The warranty period will be determined by the
original installation date of the water heater. PROOF-OF-PURCHASE AND
PROOF-OF-INSTALLATION ARE NECESSARY TO VALIDATE THIS
WARRANTY. This warranty is not transferable and applies to models listed
in Table 1 which are produced after March 1, 2000.
WARRANTY PERIODS
MODEL
TANK
1
PARTS
2
FCG / FCGL / FCGT
6 YEARS
6 YEARS
FGR / FSG / FSGH / FSGL / FSGT
6 YEARS
2 YEARS
PGC / PGCG / PGCL / PGCT
10 YEARS
10 YEARS
PGX / PGXH / PGXL / PGXT
10 YEARS
2 YEAR
When the water heater has been used for other than single family residential
application; 1. The tank warranty shall be reduced to 1 year for 6 year
models and to 3 years for 10 year models. 2. The parts warranty shall be
reduced to 1 year for all models. Returned parts which meet any of the
following conditions are not covered by this warranty: 1) improper installation
or removal, 2) damaged by other than normal wear, 3) replaced for cosmetic
purposes, or 4) returned with defaced date codes.
CONDITIONS AND EXCEPTIONS
This warranty shall apply only when the water heater is installed and
operated in accordance with 1) all local fire codes and plumbing codes,
ordinances and regulations, 2) the printed instructions provided with it, 3)
good industry practices, and 4) proper safety practices such as but not
limited to a properly sized drain pan if installed in an area where leakage
from connections of the tank would result in damage to the area adjacent
to the heater. In addition, a new temperature and pressure relief valve,
certified by the American Gas Association must have been properly installed
and piped to the nearest drain.
This warranty shall apply only when the heater is:
•
owned by the original purchaser;
•
used at temperatures not exceeding the maximum calibrated setting of
its thermostat;
•
used at water pressure not exceeding the working pressure shown on
the heater;
•
filled with potable water, free to circulate at all times and with the tank
free of damaging water sediment or scale deposits;
•
used in a non-corrosive and non-contaminated atmosphere;
•
used with factory approved anode(s) installed;
•
in its original installation location;
•
in the United States, its territories or possessions, and Canada;
•
sized in accordance with proper sizing techniques for residential water
heaters;
•
bearing a rating plate which has not been altered, defaced or removed
except as required by the warrantor;
•
not used in a closed system without a properly sized and installed
thermal expansion tank;
•
operated with properly installed dirt leg;
•
fired with the fuel for which it was factory built;
•
fired at the factory rated input;
•
operated with the inner and outer combustion chamber doors in place.
Any accident to the water heater or any part thereof (including freezing,
fire, floods, or lightning), any misuse, abuse or alteration of it, any operation
of it in a modified form, or any attempt to repair tank leaks or parts, will void
this warranty.
SERVICE AND LABOR RESPONSIBILITY
UNDER THIS 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, or reinstallation of the water heater
or part thereof.
b. Shipping and delivery charges for forwarding the new water heater or
replacement part from the nearest distributor and returning the claimed
defective heater or part to such distributor except in the state of California
where such charges are the manufacturer’s responsibility.
c. All cost necessary or incidental for handling and administrative charges,
and for any materials and/or permits required for installation of the
replacement heater or part.
LIMITATION ON IMPLIED WARRANTIES
Implied warranties, including any warranty of merchantability imposed on
the sale of this heater under state law are limited to one year duration for
the heater or any of its parts. Some states do not allow limitations on how
long an implied warranty lasts, so the above limitations may not apply to
you.
CLAIM PROCEDURE
Any claim under this 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 practical, the owner should contact: A. O. Smith Corporation,
5621 West 115th Street, Alsip, Illinois, 60803 (800) 323-2636. Canadian
customers should contact A. O. Smith Enterprises, Ltd., P.O. Box 310-
768 Erie Street, Stratford, Ontario N5A 6T3, (519) 271-5800.
The warrantor will only honor replacement with identical or similar water
heater or parts thereof which are manufactured or distributed by the
warrantor.
Dealer replacements are made subject to in-warranty validation by
warrantor.
PROOF-OF-PURCHASE AND PROOF-OF-INSTALLATION DATE ARE
REQUIRED TO SUPPORT WARRANTY CLAIM FROM ORIGINAL
OWNER. THIS FORM DOES NOT CONSTITUTE PROOF-OF-
PURCHASE OR PROOF-OF-INSTALLATION.
DISCLAIMERS
NO EXPRESSED WARRANTY HAS BEEN OR WILL BE MADE IN BEHALF
OF THE WARRANTOR WITH RESPECT TO THE HEATER OR THE
INSTALLATION, OPERATION, REPAIR OR REPLACEMENT OF THE
HEATER OR PARTS. 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.
Some states do not allow the limitation or exclusion of incidental or
consequential damages, so the above limitation or exclusion may not apply
to you.
This warranty gives you specific legal rights, and you may also have other
rights which vary from state to state.
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 __________________________________________