Rheem HG, GG User Manual

Part No. AP12171-4 (3/01) Pub. No. 49-50008-4 03-01 JR

Manufactured under trademark license by:

Rheem Manufacturing Company

P.O. Box 244020, Montgomery, AL 36124-4020

FOR YOUR SAFETY!

— Do not store or use gasoline or other flammable

vapors or liquids or other combustible materials
in the vicinity of this or any other appliance. To
do so may result in an explosion or fire.

— WHAT TO DO IF YOU SMELL GAS

● Do not try to light any appliance.

● Do not touch any electrical switch; do not

use any phone in your building.

● Immediately call your gas supplier from a

neighbor’s phone. Follow the gas supplier’s
instructions.

● If you cannot reach your gas supplier, call

the fire department.

● Do not return to your home until authorized

by the gas supplier or fire department.

— Improper installation, adjustment, alteration,

service or maintenance can cause injury,
property damage or death. Refer to this
manual. Installation and service must be
performed by a qualified installer, service
agency or the gas supplier.

WARNING: If the information in these instructions is not followed exactly,
a fire or explosion may result causing property damage, personal injury or death.

Model: HG Series, GG Series, GP Series, PG Series, SG Series,

SG Series with SmartWater™ Ignition System

The purpose of this manual is twofold: one, for the installing contractor, to provide requirements and
recommendations for the proper installation and adjustment of the water heater; and two,
for the owner–operator, to explain the features, operation, safety precautions, maintenance and
trouble shooting of the water heater. This manual includes a par ts list.

It is imperative that all persons who are expected to install, operate or adjust this water heater read
the instructions carefully so that they may understand how to do so.

Any questions regarding the operation, maintenance, service or warranty of this water heater should
be directed to the entity from whom it was purchased. If additional information is required, refer to
the section on How to Obtain Service Assistance.

Do not destroy this manual. Please read carefully and keep in a safe place for future reference.

Recognize this symbol as an indication of Important Safety Information!
Proposition 65: This appliance contains fiberglass insulation. Respirable particles of

fiberglass are known to the State of California to cause cancer. Exhaust gas from this
appliance contains chemicals, including carbon monoxide, known to the State of California to
cause birth defects or other reproductive harm.

Residential 30, 40 and 50 Gallon

Use & Care Manual

With Installation Instructions for the Contractor

Printed in USA

Water Heaters

Gas Residential

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Safety Information

Safety Precautions. . . . . . 3–6

LP Gas Models . . . . . . . . . . . 4

Installation Instructions

Location . . . . . . . . . . . . . . . . . 7

Water Connections . . . . . . . . 9

Gas Supply. . . . . . . . . . . . . . . 11

Potable Space Heating . . . . 13

Operating Instructions

Lighting Instructions. . . 14, 15

Water Temperature. . . . . . . . 16

Adjustments . . . . . . . . . . . . . 17

Care and Cleaning

Draining. . . . . . . . . . . . . . . . . 18

Burner Inspection . . . . . . . . 19

Extended Shut-Down . . . . . 19

Troubleshooting Tips

Before You Call

For Service . . . . . . . . . . . 20, 21

Customer Service

Parts List . . . . . . . . . . . . . . . 22

P roduct Registration. . 23, 24

Inside you will find many helpful hints on how to use and maintain
your water heater properly. Just a little preventive care on your
part can save you a great deal of time and money over the life of
your water heater.

You’ll find many answers to common problems in the Before You
Call For Service section. If you review our chart of Troubleshooting
Tips first, you may not need to call for service at all.

READ THIS MANUAL

FOR YOUR RECORDS

Write the model and serial numbers here:

#

#

You can find them on a label on the appliance.

Staple sales slip or cancelled check here.

Proof of the original purchase date is needed to obtain service
under the warranty.

IMPORTANT!

Fill out and return the Consumer Product Registration Card that is
in the back of this manual.

If you do need service, you can relax knowing help is only a phone
call away. For service call 800-431-1549.

IF YOU NEED SERVICE

Customer Service Troubleshooting Tips Care and Cleaning Operating Instructions Installation Instructions Safety Instructions

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Safety Instructions Installation Instructions Operating Instructions Care and Cleaning Troubleshooting Tips Customer Service

Be sure to read and understand the entire Use and Care Manual before attempting to install or operate
this water heater. It may save you time and cost. Pay particular attention to the Safety Instructions.
Failure to follow these warnings could result in serious bodily injury or death. Should you have problems
understanding the instructions in this manual, or have any questions, STOP, and get help from a qualified
service technician, or the local electric utility.

IMPORTANT SAFETY INFORMATION.
READ ALL INSTRUCTIONS BEFORE USING.

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Failure to install the draf t hood and properly vent the water heater to the outdoors as
outlined in the Venting Section of the Installation Instructions in this manual can result in
unsafe operation of the water heater. To avoid the risk of fire, explosion, or asphyxiation
from carbon monoxide, never operate this water heater unless it is properly vented and has
an adequate air supply for proper operation. Be sure to inspect the vent system for proper
installation at initial start-up; and at least annually thereafter. Refer to the Care and
Cleaning section of this manual for more information regarding vent system inspection.

DANGER!

INSTALL THE DRAFT HOOD AND PROPERLY VENT THE
WATER HEATER…

Gasoline, as well as other flammable materials and liquids (adhesives, solvents, etc.), and
the vapors they produce are extremely dangerous. DO NOT handle, use or store gasoline or
other flammable or combustible materials anywhere near or in the vicinity of a water heater.
Be sure to read and follow the warning label pictured below and other labels on the water
heater, as well as the warnings printed in this manual. Failure to do so can result in
property damage, bodily injury or death.

WARNING!

!

DANGER

FLAMMABLES

Vapors from flammable
liquids will explode and
catch fire causing death or
severe burns

Do not use or store flammable
products such as gasoline,
solvents or adhesives in the
same room or area near the
water heater.

Keep flammable products:

1. far away from heater,

2. in approved containers,

3. tightly closed and

4. out of children’s reach.

Flammable Vapors

Water heater has a main
burner and pilot flame.
The pilot flame:

1. is on all the time and

2. will ignite flammable
Va pors:

1. cannot be seen,

2. are heavier than air,

3. go a long way on the

4. can be carried from
flame by air currents.

vapors.

floor and
other rooms to the pilot

Installation:
Do not install water heater
where flammable products will
be stored or used unless the
main burner and pilot flames

Read and follow water heater warnings and instructions. If owners
manual is missing, contact the retailer or manufacturer.

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.

Customer Service Troubleshooting Tips Care and Cleaning Operating Instructions Installation Instructions Safety Instructions

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IMPORTANT SAFETY INFORMATION.
READ ALL INSTRUCTIONS BEFORE USING.

Both LP and natural gas have an odorant added to aid in detecting a gas leak. Some
people may not physically be able to smell or recognize this odorant. If you are unsure or
unfamiliar with the smell of LP or natural gas, ask the gas supplier. Other conditions, such
as “odorant fade”, which causes the odorant to diminish in intensity, can also hide or
camouflage a gas leak.

DANGER!

LIQUEFIED PETROLEUM MODELS

● Water heaters utilizing LP gas are

different from natural gas models. A
natural gas water heater will not function
safely on LP gas and vice versa.

● No attempt should ever be made to

convert the water heater from natural gas
to LP gas. To avoid possible equipment
damage, personal injury or fire, do not
connect the water heater to a fuel type
not in accordance with the unit data
plate. Propane for propane units. Natural
gas for natural gas units. These units are
not certified for any other fuel type.

● LP appliances should not be installed

below grade (for example, in a basement)
if such installation is prohibited by
federal, state and/or local laws, rules,
regulations or customs.

● Propane or LP gas must be used with

great caution. It is heavier than air and
will collect first in lower areas making it
hard to detect at nose level.

● Make sure to look and smell for LP gas

leaks before attempting to light the
appliance. Use a soapy solution to check
all gas fittings and connections. Bubbling
at a connection indicates a leak that
must be corrected. When smelling to
detect an LP leak, be sure to sniff near
the floor too.

● Gas detectors are recommended in LP

applications and their installation should
be in accordance with the manufacturer’s
recommendations and/or local laws, rules,
regulations or customs.

● It is recommended that more than one

method be used to detect leaks in LP gas
applications.

If LP gas is present or suspected:

● Do not attempt to find the cause

yourself.

● Do not try to light any appliance.

● Do not touch any electrical switch.

● Do not use any phone in your building.

● Leave the house immediately and make

sure your family and pets leave also.

● Leave the doors open for ventilation and

contact the gas supplier, a qualified
service agency or the fire department.

● Keep the area clear until the service call

has been made, the leak is corrected and
a qualified agency has determined the
area to be safe.

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Safety Instructions Installation Instructions Operating Instructions Care and Cleaning Troubleshooting Tips Customer Service

Time/Temperature Relationship in Scalds

Temperature Time To Produce a Serious Burn

120°F. More than 5 minutes
125°F. 11⁄2 to 2 minutes
130°F. About 30 seconds
135°F. About 10 seconds
140°F. Less than 5 seconds
145°F. Less than 3 seconds
150°F. About 11⁄2 seconds
155°F. About 1 second

Table courtesy of Shriners Burn Institute

The chart shown above may be used as a guide
in determining the proper water temperature for
your home.

NOTE: Households with small children, disabled,
or elderly persons may require a 120°F. or lower
thermostat setting to prevent contact with “HOT”
water.

Maximum water temperatures occur just after
burner has shut off. To find hot water temperature
being delivered, turn on a hot water faucet and
place a thermometer in the hot water stream and
read the thermometer.

The temperature of the water in the heater can be
regulated by setting the temperature dial on the
front of the thermostat. To comply with safety

regulations the
thermostat was set at
its lowest setting before
water heater was shipped
from the factory.

The illustration at the left
details the approximate
water temperature
for each mark on the
Thermostat Temperature
Dial.

DANGER: There is a Hot Water SCALD Potential if
the thermostat is set too high.

WARNING!

WATER TEMPERATURE ADJUSTMENT

Safety and energy conser vation are factors to be considered when selecting the water
temperature setting of water heater’s thermostat. Water temperatures above 125°F. can
cause severe burns or death from scalding. Be sure to read and follow the warnings outlined
on the label pictured below. This label is also located on the water heater.

Mixing valves for reducing point of use water
temperature by mixing hot and cold water in branch
water lines are available. Contact a licensed plumber or
the local plumbing authority for further information.

“Danger Range” “Safety Range”

130°F.

Temperatures are

approximate

120°F.

140°F.

150°F.

160°F.

110°F.

100°F.

90°F.

80°F.
70°F.

60°F.

!

DANGER

HOT

BURN

Water temperature over 125 °F can
cause severe burns instantly or
death from scalds.

Children, disabled and elderly are
at highest risk of being scalded.

See instruction manual before
setting temperature at water
heater.

Feel water before bathing or
showering.

Temperature limiting valves are
available, see manual.

U N I T R O L

WARNING

READ ALL INSTRUCTIONS
BEFORE LIGHTING

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Customer Service Troubleshooting Tips Care and Cleaning Operating Instructions Installation Instructions Safety Instructions

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Have the installer show you the location of the gas shut-off valve and how to shut it off if
necessary. Turn off the manual shut-off valve if the water heater has been subjected to
overheating, fire, flood, physical damage or if the gas supply fails to shut off.

● Read this manual entirely before

installing or operating the water heater.

● Use this appliance only for its intended

purpose as described in this Use and
Care Manual.

● Be sure your appliance is properly

installed by a qualified technician in
accordance with the provided installation
instructions.

● Do not attempt to repair or replace any

part of your water heater unless it is
specifically recommended in this manual.
All other servicing should be referred to a
qualified technician.

SAFETY PRECAUTIONS

IMPORTANT SAFETY INFORMATION.
READ ALL INSTRUCTIONS BEFORE USING.

WARNING!

For your safety, the information in this manual must be followed to minimize the risk of fire
or explosion, electric shock, or to prevent property damage, personal injury, or loss of life.

FOR INSTALLATIONS IN THE STATE OF CALIFORNIA

California Law requires that residential water heaters must be braced, anchored or
strapped to resist falling or horizontal displacement due to earthquake motions. For
residential water heaters up to 52 gallon capacity, a brochure with generic earthquake
bracing instructions can be obtained from: Office of the State Architect, 400 P Street,
Sacramento, CA 95814 or you may call 916-324-5315 or ask a water heater dealer.

However, applicable local codes shall govern installation. For residential water heaters
of a capacity greater than 52 gallons, consult the local building jurisdiction for acceptable
bracing procedures.

READ AND FOLLOW THIS SAFETY INFORMATION
CAREFULLY.

SAVE THESE INSTRUCTIONS

Installing the water heater.

This water heater must be installed in accordance with these instructions, local codes, utility company
requirements, and/or in the absence of local codes, use the latest edition of the American National
Standard/National Fuel Gas Code. A copy can be purchased from either the American Gas Association,
1515 Wilson Blvd., Arlington, VA 22209 as booklet Z223.1 or National Fire Prevention Association,
Batterymarch Park, Quincy, MA 02269 as booklet NFPA No. 54.

Location

The water heater should not be located
in an area where leakage of the tank or
connections will result in damage to the
area adjacent to it or to lower floors of
the structure.

When such areas cannot be avoided it is
recommended that a suitable catch pan,
adequately drained, must be installed
under the water heater.

The pan must not restrict combustion
air flow to the bottom of the water heater.

Catch pan kits are available from the store
where the water heater was purchased,
or any water heater distributor.

A gas fired water heater should not be
installed in a space where liquids which
give off flammable vapors are to be used
or stored. Such liquids include gasoline,
LP gas (butane and propane), paint or
adhesives and their thinners, solvents
or removers.

Because of natural air movement in a
room or other enclosed space,
flammable vapors can be carried some
distance from where their liquids are
being used or stored. The open flame of
the water heater’s pilot light or main
burner can ignite these vapors causing
an explosion or fire which may result in
severe burns, death or proper ty damage.

For these reasons installation of a gas fired
water heater in a garage is not desirable.

Raising the gas fired water heater will
reduce, but not eliminate, the possibility
of lighting the vapor of any flammable
liquids which may be improperly stored
or accidentally spilled.

Stand kits to raise the water heater 18″
above the floor are available from the store
where the water heater was purchased,
or any water heater distributor. These
kits must comply with local codes.

The water heater must be located so it is
not subject to physical damage, for example,
by moving vehicles, area flooding, etc.

● The water heater should be installed

as close as practical to the gas vent
or chimney.

● Long hot water lines should be insulated

to conserve water and energy.

● The water heater and water lines

should be protected from exposure
to freezing temperatures.

● Do not install the water heater in

bathrooms, bedrooms, any occupied
rooms normally kept closed, or in
outdoor unprotected areas.

● Minimum clearance from combustible

construction is 1″ sides and rear; 3″
from front of control; 12″ from the
top. If the clearances stated on the
Instruction/Warning Label, located on
the front of the heater differ, install
the water heater according to the
clearances stated on the label.

● The water heater may be installed on

combustible floors, but not directly on
carpeting. If the water heater must be
installed on carpeting, place a metal
or wood panel beneath the water
heater, extending beyond its full width
and depth at least 3″ in all directions.

● If the water heater is installed in an

alcove or closet, the entire floor must
be covered by a wood or metal panel. A
minimum of 24″ clearance from the
front and top should be available for
adequate inspection and servicing.

WARNING: Combustible construction
refers to adjacent walls and ceilings
and should not be confused with
combustible or flammable products
and materials. Combustible and/or
flammable products and materials
should never be stored in the vicinity
of this or any gas appliance.

The auxiliary catch pan
installation MUST conform
to local codes.

Max.

2″

Diameter of

water heater

plus 2″ min.

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Safety Instructions Installation Instructions Operating Instructions Care and Cleaning Troubleshooting Tips Customer Service

WARNING: If a location
in a garage is the only
alternative, the gas water
heater should be installed
so that the open flame of
the pilot and main burner

are no less than 18″ above

the garage floor, unless
specifically exempted from
this by local code, rule,
regulation or custom.

8

Installing the water heater.

Proper operation of the water heater requires air for combustion and ventilation. Provisions for
combustion and ventilation air must comply with referenced codes and standards.

Customer Service Troubleshooting Tips Care and Cleaning Operating Instructions Installation Instructions Safety Instructions

Combustion and Ventilation Air

NOTE: If the water heater is installed in
an unconfined space within a building of
conventional frame, masonry or metal
construction, infiltration air is normally
adequate for proper combustion and
ventilation. If the water heater is
installed in a confined space,
provisions for combustion and
ventilation air must be made.

A confined space is one having a volume
of less than 50 cubic feet per 1000
BTUH of the aggregate input of all
appliances within that space.

The air must be supplied through two
permanent openings of equal area. One
is to be located within 12″ above the
floor and the other is to be located
within 12″ below the ceiling.

The minimum net free area of each opening
must not be less than one square inch
per 1000 BTUH of the total input rating
of all the appliances in the enclosure
(but not less than 100 square inches), if
each opening communicates with other
unconfined areas inside the building.

Buildings of unusually tight construction
shall have the combustion and ventilation
air supplied from outdoors, or a freely
ventilated attic or crawl space.

If air is supplied from outdoors, directly
or through vertical ducts, there must be
two openings located as specified above
and each must have a minimum net free
area of not less than one square inch
per 4000 BTUH of the total input rating
of all the appliances in the enclosure.

If horizontal ducts are used to
communicate with the outdoors, each
opening must have a minimum net free
area of not less than one square inch
per 2000 BTUH of the total input rating
of all the appliances in the enclosure. If
ducts are used, the minimum
dimensions of rectangular air ducts
shall not be less than 3″.

NOTE: If the duct openings are to be
covered with a protective screen or
grill, the net free area of the covering
material must be used in determining
the size of the openings. Protective
screening for the openings must not

be smaller than 1/4″ mesh to prevent

clogging by lint or other debris.

Corrosive Atmospheres

The air in beauty shops, dry cleaning
establishments, photo processing labs,
and storage areas for liquid and
powdered bleaches or swimming pool
chemicals often contain such
halogenated hydrocarbons.

An air supply containing halogenated
hydrocarbons may be safe to breathe,
but when it passes through a gas flame
corrosive elements are released that
will shorten the life of any gas burning
appliance.

Propellants from common spray cans or
gas leaks from refrigeration equipment
are highly corrosive after passing
through a flame.

The water heater warranty is voided when
failure of the heater is due to operation
in a corrosive atmosphere.

NOTE: The water heater
should not be installed
near an air supply
containing halogenated
hydrocarbons.

Inspect Shipment

Inspect the water heater for possible damage. Check the markings on the rating
plate of the water heater to be certain the type of gas supplied corresponds to the
water heater requirements.

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Safety Instructions Installation Instructions Operating Instructions Care and Cleaning Troubleshooting Tips Customer Service

Thermal Expansion

Determine if a check valve exists in the inlet water line. It may have been installed

in the cold water line as a separate back flow preventer, or it may be part of a pressure
reducing valve, water meter or water softener. A check valve located in the cold water inlet line
can cause what is referred to as a “closed water system”. A cold water inlet line with no
check valve or back flow prevention device is referred to as an “open” water system.

As water is heated, it expands in volume and creates an increase in the pressure within the
water system. This action is referred to as “thermal expansion”. In an “open” water system,
expanding water which exceeds the capacity of the water heater flows back into the city main
where the pressure is easily dissipated.

A “closed water system”, however, prevents the expanding water from flowing back into the
main supply line, and the result of “thermal expansion” can create a rapid and dangerous
pressure increase in the water heater and system piping. This rapid pressure increase can
quickly reach the safety setting of the relief valve, causing it to operate during each heating
cycle. Thermal expansion, and the resulting rapid, and repeated expansion and contraction of
components in the water heater and piping system can cause premature failure of the relief
valve, and possibly the heater itself. Replacing the relief valve will not correct the problem!

The suggested method of controlling thermal expansion is to install an expansion tank in the
cold water line between the water heater and the check valve (see illustration below). The
expansion tank is designed with an air cushion built in that compresses as the system
pressure increases, thereby relieving the over pressure condition and eliminating the repeated
operation of the relief valve. Other methods of controlling thermal expansion are also available.
Contact your installing contractor, water supplier or plumbing inspector for additional
information regarding this subject.

Typical Installation

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HOT

Heat trap
6″ minimum

Heat trap

6″ minimum

Union

Hot water outlet

to fixtures

Temperature and

pressure relief valve

Relief valve
discharge line to
suitable open drain.

To gas supply

Sediment trap

Cap

Jacket door

Auxiliary catch pan

Ground joint union

Drain
valve

To cold water
supply

6″ air gap

Shut-off

valve

Draft hood

Pitch up 1/4″
per foot

Union

Thermostatic gas valve

Anode

Vent connector

to chimney

Manual gas shut-off

5 feet

from the

ground

minimum

Water Supply Connections

Refer to the illustration below for suggested typical installation. The installation of unions or
flexible copper connectors is recommended on the hot and cold water connections so that the
water heater may be easily disconnected for servicing if necessary. The HOTand COLD water
connections are clearly marked and are 3/4″NPT on all models. Install a shut-off valve in the
cold water line near the water heater.

IMPORTANT: Do not apply
heat to the HOT or COLD
water connections. If sweat
connections are used,
sweat tubing to adapter
before fitting adapter to the
cold water connections on
heater. Any heat applied to
the cold water supply
fittings will permanently
damage the dip tube.

WARNING: The water heater should not be installed in a space where liquids which give off flammable vapors
are to be used or stored.

Shut-off valve

Thermal expansion
tank (if required)

Customer Service Troubleshooting Tips Care and Cleaning Operating Instructions Installation Instructions Safety Instructions

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Installing the water heater.

A new combination temperature and pressure relief valve, complying with the Standard for Relief Valves and
Automatic Gas Shut-Off Devices for Hot Water Supply Systems, ANSI Z21.22, is supplied and must remain
in the opening provided and marked for the purpose on the water heater. No valve of any type should be
installed between the relief valve and the tank. Local codes shall govern the installation of relief valves.

Relief Valve

The pressure rating of the relief valve
must not exceed 150 PSI, the maximum
working pressure of the water heater as
marked on the rating plate.

The BTUH rating of the relief valve must
equal or exceed the BTUH input of the
water heater as marked on its rating plate.

Position the outlet of the relief valve
above a suitable open drain to eliminate
potential water damage. Piping used
should be of a type approved for hot
water distribution.

The discharge line must be no smaller
than the outlet of the valve and must
pitch downward from the valve to allow
complete drainage (by gravity) of the
relief valve and discharge line.

The end of the discharge line should not
be threaded or concealed and should be
protected from freezing. No valve of any
type, restriction or reducer coupling
should be installed in the discharge line.

To Fill the Water Heater

Make certain that drain valve is closed,
then open the shut-off valve in the cold
water supply line.

Open each hot water faucet slowly to
allow the air to vent from the water
heater and piping.

A steady flow of water from the hot water
faucet(s) indicates a full water heater.

WARNING: The tank
must be full of water before
heater is turned on. The
water heater warranty does
not cover damage or failure
resulting from operation
with an empty or partially
empty tank.

Condensation

Condensation can form on the tank when
it is first filled with water. Condensation
might also occur with a heavy water
draw and very cold inlet water
temperatures.

Drops of water falling on the burner can
produce a sizzling or pinging sound, and
the water may also be seen beneath the
water heater.

This condition is not unusual, and will
disappear after the water becomes
heated. If, however, the condensation
continues, examine the piping and
fittings for possible leaks.

Safety Instructions Installation Instructions Operating Instructions Care and Cleaning Troubleshooting Tips Customer Service

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WARNING: Do not attempt to convert this water heater for use with a different type of gas other than the type

shown on the rating plate. Such conversion could result in hazardous operating conditions.

Leak Testing

The water heater and its gas
connections must be leak tested at
normal operating pressures before
it is placed in operation.

Turn on the manual gas shut-off
valve near the water heater.

Use a soapy water solution to test
for leaks at all connections and
fittings. Bubbles indicate a gas leak
that must be corrected.

The factory connections to the
thermostat should also be leak tested
after the water heater is placed in
operation.

High Altitude…

Ratings of gas appliances are based
on sea level operation and need not be
changed for installations at elevations
up to 2,000 feet.

For installations above 2,000 feet, the
input must be reduced per the National
Fuel Gas Code for each 1,000 feet above
sea level. Contact the local gas supplier
for more information.

Pressure Testing the Gas Supply System

The water heater and its manual gas
shut-off valve must be disconnected
from the gas supply piping system
during any high pressure testing of
that system at pressures in excess
of 1/2 psi (14″ w.c.).

The water heater must be isolated from
the gas piping system by closing the
manual gas shut-off valve during any
pressure testing of the gas supply piping.

Gas Supply

The branch gas supply line to the water
heater should be clean 1/2″ black steel
pipe or other approved gas piping
material.

A ground joint union or ANSI design
certified semi-rigid or flexible gas
appliance connector should be installed
in the gas line close to the water heater.
A manual gas shut-off valve should be at
least 5 ft. above the floor and readily
accessible.

Compound used on the threaded joints
of the gas piping must be of the type
resistant to the action of LP gas. Use
compound sparingly on male threads only.

A sediment trap should be installed at
the bottom of the gas line.

Do not use excessive force (over 31.5 ft
lbs.) in tightening the pipe joint at the
thermostat inlet, particularly if teflon
pipe compound is used, as the valve
body may be damaged.

The inlet gas pressure to the water
heater must not exceed 14″ w.c. for
natural or LP gas. For purposes of input
adjustment, the minimum inlet gas
pressure (with main burner on) is shown
on the water heater rating plate. If high
or low gas pressures are present, contact
your gas supplier for correction.

WARNING: Never use an
open flame to test for gas
leaks, as bodily injury,
property damage or death
could result.

Customer Service Troubleshooting Tips Care and Cleaning Operating Instructions Installation Instructions Safety Instructions

12

Installing the water heater.

The water heater must be installed with the factory supplied draft hood in place.

Venting

Vent connectors must be attached to
the draft hood outlet to connect the
water heater to the gas vent or chimney.
The vent connectors must be the same
size (diameter) as the draft hood or
larger, never smaller.

For proper venting in certain
installations a larger vent connector size
may be needed. Consult the Vent Tables
in Appendix G of the latest version of
the National Fuel Gas Code (ANSI
booklet Z223.1 or NFPA booklet 54.)

Horizontal vent connectors must be
pitched upward to the chimney at least
1/4″ per foot of length. Single wall vent
connectors must be at least 6″ from
adjacent unprotected combustible
surface. Vent joints must be securely
fastened by sheet metal screws or other
approved method.

For increased energy efficiency, some
water heaters have been supplied with
two (2) twenty four inch sections of pipe
insulation. Please install the insulation,
according to the illustration on the left,
that best meets your requirements.

The manufacturer’s warranty does not
cover any damage or defect caused by
installation, attachment or use of
any type of energy saving or other
unapproved devices (other than those
authorized by the manufacturer) into,
onto or in conjunction with the water
heater. The use of unauthorized energy
saving devices may shorten the life of
the water heater and may endanger life
and property.

The manufacturer disclaims any
responsibility for such loss or injury
resulting from the use of such
unauthorized devices.

CAUTION: Application of any
external insulation to this water heater
will require careful attention to the
following:

● Do not cover the operating or warning

labels attached to the water heater or
attempt to relocate them on the
exterior of insulation blanket.

● Do not apply insulation to the top

of the water heater. This will inter fere
with the safe operation of the draft
hood.

● Do not cover the burner access panel,

thermostat/gas valve or pressure and
temperature relief valve.

● Do not apply insulation to the bottom

of the water heater or the 2″ space
between the bottom pan of the water
heater and the floor. This area must
be unobstructed so as not to restrict
combustion air flow to the burner.

● Inspect the insulation blanket

frequently making certain it has not
sagged and is restricting the
combustion air to the bottom of the
water heater. This could result in an
unsafe operating condition.

DANGER: Failure to
install the draft hood and
properly vent the water
heater to the outdoors as
outlined in the Venting
section of this manual will
result in unsafe operation of
the water heater causing
bodily injury, explosion, fire
or death. To avoid the risk
of fire, explosion, or
asphyxiation from carbon
monoxide, NEVER operate
the water heater unless it
is properly vented and has
adequate air supply for
proper operation as
outlined in the Venting
section of this manual.

WARNING: If local codes
require external application
of insulation blanket kits
the manufacturer’s
instructions included with
the kit must be carefully
followed.

Typical vertical piping
arrangement

Typical horizontal piping
arrangement

HOT

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COLD

E

HOT

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V

A

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COLD

E

Safety Instructions Installation Instructions Operating Instructions Care and Cleaning Troubleshooting Tips Customer Service

Supplemental instructions for gas water heaters
installed in potable/space heating applications.

Local codes or plumbing authority requirements may var y from the instructions or diagrams provided in
this manual and take precedent over these instructions.

Tee fitting for vertical hot
water supply lines.

Combination Potable and Space Heating Application

Tee fitting must be installed as shown.
This insures that any air in the water
lines will be purged through the domestic
water faucets and showers.

WARNING: When this system
requires water for space heating at
elevated temperatures (above 125°F.), a
mixing or tempering valve must be
installed in the hot water supply line to
the house in order to reduce the scald
hazard potential.

WARNING: Any piping or components
used in the installation of this water
heater in a combination potable and
space heating application must be
suitable for use with drinking water.

WARNING: If this water heater is
installed in an application intended to
supply domestic hot water needs and
hot water for space heating purposes,
do not connect the heater to an existing
heating unit or components of a heating
system that have previously been used
with a non drinking water system. Toxic
chemicals such as those used for boiler
treatment may be present and will
contaminate the drinking water supply
causing possible health risks. Never
introduce toxic chemicals, such as
those used for boiler treatment, into
this system.

Tee fitting for horizontal hot
water supply lines.

Hot water
supply to
house

From HOT

outlet on

water heater

From HOT

outlet on

water heater

Hot water
supply to
heating
unit

Hot water
supply to
house

Hot water supply
to heating unit

Typical Piping Diagram for Combination Potable/Space Heating Installation

Spring loaded check valve in

heating unit hot water supply line

and cold water return line (not

supplied with water heater)

NOTE: This valve is incorporated in

some heating units. Refer to the

installation instructions supplied

with specific heating unit to

determine if it is required.

See diagrams above for proper

pipe application for vertical

or horizontal supply lines

Gas line to water heater

Cold water return line
from heating unit

Hot water
supply line into
heating unit

Heating unit

Isolation valve in
cold water return
line from heating
unit (not supplied
with water heater)

Mixing or tempering
valve (refer to
warning above)

Gas water heater

Temperature and

pressure relief valve

discharge line

Drain valve
(not supplied
with water
heater)

6″ air gap

Isolation valve in hot water

supply line to heating unit

(not supplied with water heater)

Incoming cold water supply

Domestic hot water supply

13

Air vent

HOT

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COLD

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Lighting the water heater.

Before operating this water heater, be sure to read and follow the instructions on the label pictured below
and all other labels on the water heater, as well as the warnings printed in this manual. Failure to do so
can result in unsafe operation of the water heater resulting in property damage, bodily injury, or death.
Should you have any problems reading or following the instructions in this manual, STOP, and get help
from a qualified person.

Customer Service Troubleshooting Tips Care and Cleaning Operating Instructions Installation Instructions Safety Instructions

14

FOR YOUR SAFETY READ BEFORE OPERATING

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

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

A. This appliance has a pilot which must be lighted by hand.

When lighting the pilot, follow these instructions exactly.

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

B. BEFORE PUTTING THIS APPLIANCE INTO SERVICE—

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 the appliance.

• Do not touch any electrical switch; do not use any
phone in your building.

• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.

C. Use only your hand to turn the gas control knob. Never

use tools. If the knob will not turn by hand, don't try to
repair it, call a qualified service technician. Force or
attempted repair may result in 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 valve that has been under
water.

OPERATING INSTRUCTIONS

1. STOP! READ THE SAFETY INFORMATION ABOVE
ON THIS LABEL.

2. TURN GAS COCK KNOB CLOCKWISE TO
“OFF” POSITION.

GAS COCK

RED BUTTON

3. TURN TEMPERATURE DIAL
COUNTERCLOCKWISE TO LOWEST SETTING.

4. WAIT FIVE (5) MINUTES TO CLEAR OUTANY GAS.
IF YOU SMELL GAS, STOP! FOLLOW “B” IN THE
SAFETY INFORMATION ABOVE ON THIS LABEL.

IF YOU DON’T SMELL GAS, GO TO THE NEXT STEP.

5. REMOVE BOTH THE INNER DOOR AND OUTER DOOR
FROM THE WATER HEATER.

6. FOLLOW THE METALTUBES FROM GAS CONTROL
THRU DOOR OPENINGS.
THE PILOT IS
LOCATED ON THE
HORIZONTAL LEG OF THE
LARGER TUBE (OR BURNER).

UNITROL

THERMOCOUPLE

KNOB

INDEX

TEMPERATURE DIAL

PILOT
BURNER

7. TURN THE GAS COCK KNOB COUNTER CLOCKWISE
TO “PILOT” POSITION.

8. PUSH DOWN ON THE “RED BUTTON” UNTIL IT COMES
TO REST ON THE TOP OF CONTROL. IT MUST CLEAR
THE NOTCH PROVIDED IN THE “GAS COCK KNOB”. HOLD
“RED BUTTON” DOWN AND LIGHT THE PILOT WITH A
MATCH. CONTINUE TO HOLD THE “RED BUTTON” IN FOR
ABOUT ONE (1) MINUTE AFTER THE PILOT IS LIT .
RELEASE BUTTON AND IT WILL POP BACK UP.
PILOT SHOULD REMAIN LIT. IF IT GOES OUT, REPEAT
STEPS 2 THROUGH 8.

IF THE BUTTON DOES NOT POP BACK 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 COCK KNOB” TO “OFF”
AND CALL YOUR SERVICE TECHNICIAN OR GAS
SUPPLIER.

9. REPLACE INNER AND OUTER DOORS.

10. TURN “GAS COCK KNOB” COUNTER CLOCKWISE TO
“ON”.

11. TURN THE TEMPERATURE DIALTO THE DESIRED
SETTING.

1. TURN TEMPERATURE DIAL COUNTER CLOCKWISE TO LOWEST SETTING.

2. TURN GAS COCK KNOB CLOCKWISE TO “OFF” POSITION.

TO TURN OFF GAS TO APPLIANCE

Safety Instructions Installation Instructions Operating Instructions Care and Cleaning Troubleshooting Tips Customer Service

15

Lighting the water heater. (With SmartWater™ Ignition System)

Before operating this water heater, be sure to read and follow the instructions on the label pictured below
and all other labels on the water heater, as well as the warnings printed in this manual. Failure to do so
can result in unsafe operation of the water heater resulting in property damage, bodily injury, or death.
Should you have any problems reading or following the instructions in this manual, STOP, and get help
from a qualified person.

A. This appliance is equipped with a piezoelectric igniter

which lights the pilot. When lighting the pilot, follow these
instructions exactly.

B. BEFORE PUTTING THIS APPLIANCE INTO SERVICE—

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 the appliance.

• Do not touch any electrical switch; do not use any
phone in your building.

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

C. Use only your hand to turn the gas control knob. Never

use tools. If the knob will not turn by hand, don’t try to
repair it, call a qualified service technician. Force or
attempt to 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.

FOR YOUR SAFETY READ BEFORE OPERATING

OPERATING INSTRUCTIONS

TO TURN OFF GAS TO APPLIANCE

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

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

1. STOP! READ THE SAFETY INFORMATION ABOVE
ON THIS LABEL.

2. TURN THE GAS COCK KNOB CLOCKWISE TO
“OFF” POSITION.

3. TURN THE TEMPERATURE DIAL
COUNTERCLOCKWISE TO LOWEST SETTING.

4. WAIT FIVE (5) MINUTES TO CLEAR OUT ANY GAS.
IF YOU SMELL GAS, STOP! FOLLOW “B” IN THE
SAFETY INFORMATION ABOVE ON THIS LABEL.
IF YOU DON’T SMELL GAS, GO TO THE NEXT STEP.

5. REMOVE BOTH THE INNER DOOR AND OUTER DOOR
FROM THE WATER HEATER.

7. TURN THE GAS COCK KNOB COUNTERCLOCKWISE
TO “PILOT” POSITION.

8. PUSH DOWN THE “RED BUTTON” UNTIL IT COMES TO
REST ON THE TOP OF CONTROL. IT MUST CLEAR
THE NOTCH PROVIDED IN THE “GAS COCK KNOB”.
HOLD “RED BUTTON” DOWN AND IMMEDIATELY
DEPRESS THE IGNITER UNTIL YOU HEAR A LOUD
CLICK. REPEAT IMMEDIATELY IF PILOT DOES NOT
LIGHT ON THE FIRST TRY. IF PILOT DOES NOT
LIGHT BY THE FOURTH ATTEMPT, REPEAT STEPS 2
THROUGH 8. AFTER THE PILOT IS LIT, CONTINUE TO
HOLD THE “RED BUTTON” IN FOR ABOUT ONE (1)
MINUTE. RELEASE BUTTON AND IT WILL POP BACK UP.
PILOT SHOULD REMAIN LIT. IF IT GOES OUT, REPEAT
STEPS 2 THROUGH 8.

• IF THE BUTTON DOES NOT POP BACK 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 COCK KNOB” TO “OFF” AND
CALL YOUR SERVICE TECHNICIAN OR GAS SUPPLIER.

10. TURN “GAS COCK KNOB” COUNTERCLOCKWISE
TO “ON”.

INDEX

TEMPERATURE DIAL

GAS COCK KNOB

1. TURN TEMPERATURE DIAL COUNTERCLOCKWISE TO LOWEST SETTING.

2. TURN GAS COCK KNOB CLOCKWISE TO “OFF” POSITION.

9. REPLACE INNER AND OUTER DOORS.

6. FOLLOW THE METAL TUBES
FROM GAS CONTROL THROUGH
DOOR OPENINGS. THE PILOT IS
LOCATED ON THE HORIZONTAL
LEG OF THE LARGER TUBE
(OR BURNER).

• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.

RED BUTTON

PIEZOELECTRIC
IGNITER

PILOT
BURNER

THERMOCOUPLE

PIEZO­ELECTRIC
IGNITER

UNITROL

11. TURN THE TEMPERATURE DIAL TO THE DESIRED
SETTING.

Customer Service Troubleshooting Tips Care and Cleaning Operating Instructions Installation Instructions Safety Instructions

16

Time/Temperature Relationship in Scalds

Temperature Time To Produce a Serious Burn

120°F. More than 5 minutes
125°F. 11⁄2 to 2 minutes
130°F. About 30 seconds
135°F. About 10 seconds
140°F. Less than 5 seconds
145°F. Less than 3 seconds
150°F. About 11⁄2 seconds
155°F. About 1 second

Table courtesy of Shriners Burn Institute

DANGER: There is a hot
water scald potential
if the thermostat is set
too high. Households with
small children, disabled, or
elderly persons may require
a 120°F. or lower thermostat
setting to prevent contact
with HOT water.

Water Temperature Setting

The temperature of the water in the
water heater can be regulated by setting
the temperature dial on the front of the
thermostat.

Safety and energy conser vation are
factors to be considered when selecting
the water temperature setting of the
water heater’s thermostat(s). The lower
the temperature setting, the greater the
savings in energy and operating costs.

To comply with safety regulations the
thermostat was factory set at 120°F. or
less where local codes require. This is the
recommended starting point.

Water temperatures above 125°F.
can cause severe burns or death from
scalding. Be sure to read and follow the
warnings outlined in this manual and on
the label on the water heater. This label
is located on the water heater near the
thermostat access panel.

Mixing valves for reducing point of use
water temperature by mixing hot and
cold water in branch water lines are
available. Contact a licensed plumber or
the local plumbing authority for further
information.

The chart below may be used as a guide
in determining the proper water
temperature for your home.

Safety Precautions

Do turn off manual gas shut-off valve if water

heater has been subjected to over heating, fire,
flood, physical damage or if the gas supply fails
to shut off.

Do Not turn on water heater unless it is filled
with water.

Do Not turn on water heater if cold water supply
shut-off valve is closed.

Do Not allow combustible materials such as
newspaper, rags or mops to accumulate near
water heater.

Do Not store or use gasoline or other flammable
vapors and liquids, such as adhesives or paint
thinner, in vicinity of this or any other appliance.
If such flammables must be used, open doors
and windows for ventilation, and all gas burning
appliances in the vicinity should be shut off
including their pilot lights, to avoid vapors lighting.

NOTE: Flammable vapors may be drawn by air currents
from surrounding areas to the water heater.

If there is any difficulty in understanding or
following the Operating Instructions or the
Care and Cleaning section, it is recommended that
a qualified person or serviceman per form the work.

Operating the water heater.

CAUTION: Hydrogen gas can be produced in a hot water system served by this water heater that has not been
used for a long period of time (generally two weeks or more). HYDROGEN GAS IS EXTREMELY FLAMMABLE!! To
dissipate such gas and to reduce risk of injury, 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 be an unusual sound such as air escaping through the pipe as the water begins to flow. Do
not smoke or use an open flame near the faucet at the time it is open.

Safety Instructions Installation Instructions Operating Instructions Care and Cleaning Troubleshooting Tips Customer Service

17

Operating the water heater.

If adjustment is necessary…

Maximum water temperatures occur just
after the burner has shut off. To
determine the hot water temperature
turn on a hot water faucet and place a
thermometer in the hot water stream.

The wide reference mark near WARM
on the rim of the temperature dial,
represents an approximate water
temperature of 120°F.

The long wide reference mark, to the lef t,
represents an approximate water
temperature of 130°F.

Each reference mark above or below
these points indicates an approximate
change of 10°F.

To adjust the temperature, turn the
temperature dial to the desired setting.

The thermostat is constructed with a
built in safety shut-off device designed
to shut off the gas supply to the burner
if the pilot flame is extinguished for any
reason.

The thermostat is also equipped with a
single use gas shut off device that will
shut off the gas supply to the burner if
the water heater exceeds normal
operating temperatures. Refer to the
BEFORE YOU CALL FOR SERVICE section
of this manual, or contact your dealer.

WARNING: Should overheating occur
or the gas supply fail to shut off, turn
off the manual gas control valve to the
appliance.

If the water heater has been subjected
to fire, flood or physical damage, turn
off the manual gas control (shut-off)
valve, and do not operate the water
heater again until it has been checked
by qualified personnel.

NOTE: Replace any part of the gas control
system which has been under water.

“Danger Range” “Safety Range”

Temperature dial

(temperatures are approximate)

130°F.

Gas cock knob

120°F.

140°F.

150°F.

160°F.

110°F.

100°F.

90°F.

80°F.

70°F.

60°F.

Red Button

U N I T R O L

WARNING

READ ALL INSTRUCTIONS
BEFORE LIGHTING

W

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Customer Service Troubleshooting Tips Care and Cleaning Operating Instructions Installation Instructions Safety Instructions

18

Care and cleaning of the water heater.

Draining the Water Heater

CAUTION: Shut off gas to the water
heater at the thermostat gas cock or
manual shut-off valve before draining
water.

DANGER: Before manually operating
the relief valve, make certain no one will
be exposed to the hot water released by
the valve. The water drained from the
tank may be hot enough to present a
scald hazard and should be directed to
a suitable drain to prevent injury or
damage.

In order to drain the water heater, turn
off the cold water supply. Open a hot
water faucet or lift the handle on the
relief valve to admit air to the tank.

Attach a garden hose to the drain
valve on the water heater and direct
the stream of water to a drain. Open
the valve.

Routine Preventative Maintenance

Properly maintained, your water heater
will provide years of dependable trouble­free service.

It is suggested that a routine preventive
maintenance program be established
and followed by the user.

It is further recommended that a
periodic inspection of the thermostat,
burner, relief valve, internal flue-way and
venting system should be made by
service personnel qualified in gas
appliance repair.

At least once a year, lift and release the
lever handle on the temperature pressure
relief valve, located near the top of the
water heater, to make cer tain the valve
operates freely. Allow several gallons to
flush through the discharge line to an
open drain.

NOTE: If the temperature and pressure
relief valve on the hot water heater
discharges periodically, this may be due
to thermal expansion in a closed water
system. Contact the water supplier or
your plumbing contractor on how to correct
this. Do not plug the relief valve outlet.

A water heater’s tank can act as a
setting basin for solids suspended in
the water. It is therefore not uncommon
for hard water deposits to accumulate
in the bottom of the tank. It is
suggested that a few quarts of water be
drained from the water heater’s tank
every month to clean the tank of these
deposits.

Rapid closing of faucets or solenoid
valves in automatic water using
appliances can cause a banging noise
heard in a water pipe. Strategically
located risers in the water pipe system
or water hammer arresting devices can
be used to minimize the problem.

The anode rod should be removed from
the water heater’s tank annually for
inspection and replaced when more than
6″ of core wire is exposed at either end
of the rod.

Make sure the cold water supply is
turned off before removing anode rod.

Housekeeping

Vacuum around the base of the water
heater for dust, dirt and lint on a
regular basis.

To insure sufficient ventilation and
combustion air supply, proper clearances
must be maintained.

DANGER: Combustible materials,
such as clothing, cleaning materials,
or flammable liquids, etc., must
not be placed against or next to
the water heater.

DANGER: Before
manually operating the
relief valve, make certain
no one will be exposed to
the danger of coming in
contact with the hot water
released by the valve. The
water may be hot enough
to create a scald hazard.
The water should be
released into a suitable
drain to prevent injury or
property damage.

Safety Instructions Installation Instructions Operating Instructions Care and Cleaning Troubleshooting Tips Customer Service

19

Venting System Inspection

The water heater’s internal flue must be
inspected annually to be certain it is
clean by removing the draft hood and
flue baffle.

When reinstalling the flue baffle make
certain it is hung securely by its hanger
at the top of the flue way.

Remove any scale that may have fallen
on the burner or floor shield and
reinstall the draft hood.

Inspect the gas venting system and the
chimney.

Make certain the vent connector from
the draft hood to the chimney is
properly positioned and securely
attached.

If after inspection of the vent system
you found sooting or deterioration
call the local gas utility to correct the
problem and clean or replace the flue and
venting before resuming operation
of the water heater.

Burner Inspection

Visually inspect the burners annually.
Inspect the main burner while firing

and pilot burner flame with the main
burner off.

If any unusual burner operation is noted,
the water heater should be shut off until
qualified service assistance can be
obtained.

For cleaning, remove the burner from the
water heater. A vacuum cleaner can be
used on the burner and floor shield
inside the water heater. The burner can
also be cleaned by scrubbing with mild
detergent.

CAUTION: For your safety, cleaning
of the main burner should be performed
only by qualified service personnel.

Proper burner and pilot flame
pattern.

Vacation and Extended Shut-Down

If the water heater is to remain idle for an
extended period of time, the power and
water to the appliance should be turned
off to conserve energy and prevent a
build-up of dangerous hydrogen gas.

The water heater and piping should be
drained if they might be subjected to
freezing temperatures.

After a long shut-down period, the water
heater’s operation and controls should
be checked by qualified service personnel.
Make certain the water heater is
completely filled again before placing it
in operation.

NOTE: Refer to the
Hydrogen Gas Caution in
the Operating Instructions.

Anode Rod

This water heater is equipped with an
anode rod designed to prolong the life of
the glass lined tank. The anode rode is
slowly consumed cathodically, thereby
eliminating or minimizing corrosion of
the glass lined tank.

Water sometimes contains a high
sulfate and/or mineral content and
together with cathodic protection
process can produce a hydrogen sulfide,
or rotten egg odor in the heated water.
Chlorination of the water supply should
minimize the problem.

NOTE: Do not remove
the anode rod from the
water heater’s tank,
except for inspection
and/or replacement, as
permanent removal will
shorten the life of the glass
lined tank and affect the
water heater warranty.

Customer Service Troubleshooting Tips Care and Cleaning Operating Instructions Installation Instructions Safety Instructions

20

Problem Possible Causes What To Do

Condensation This usually happens when ● This is normal. After the water in the tank warms

a new water heater is up the condensation will disappear. If, however, the
filled for the first time. condition persists, examine the piping and fittings

for possible leaks.

Moisture from the products ● This is normal and will disappear in time. Excessive
of combustion condensing condensation can cause pilot outage.
on the tank surface.

An undersized water ● Use a water heater size that meets the requirements
heater will cause of your needs.
condensation.

Yellow flame Scale on top of the burner. ● Shut off the water heater and remove scale.

or sooting

Combustion air inlets or ● Remove lint or debris and inspect air inlet opening
flue-way restricted. for restriction.

Not enough combustion or ● Proper operation of the water heater requires air for
ventilation air supplied to combustion and ventilation. See the Combustion and
the water heater location. Ventilation Air information in the Locating the water

heater section of this manual.

Unable to light Temperature dial not ● See the Lighting the water heater section of this
the pilot correctly positioned. manual.

Pilot orifice clogged. ● The pilot should be cleaned or replaced by a qualified

service technician.

Pilot tube pinched or ● The pilot should be cleaned, repaired or replaced by a
clogged. qualified service technician.

Air in gas line. ● Contact a qualified service technician to purge the air

from the gas line.

Pilot does not stay Loose thermocouple. ● The connection at the thermostat should be tightened
lit when the RED by a qualified service technician.

button is released

Thermocouple breakdown. ● The thermocouple should be replaced by a qualified

service technician.

Safety magnet breakdown. ● The thermostat should be replaced by a qualified

service technician.

Thermostat’s single ● The thermostat should be replaced by a qualified
use gas shut-off device service technician.
has opened.

CAUTION: For your safety DO NOT attempt repair of gas piping, thermostat, burners, vent connectors or other

safety devices. Refer repairs to qualified service personnel.

Before You Call For Service…

Troubleshooting Tips
Save time and money! Review the charts on
the following pages first and you may not
need to call for service.

Safety Instructions Installation Instructions Operating Instructions Care and Cleaning Troubleshooting Tips Customer Service

21

Problem Possible Causes What To Do

Rumbling noise Scale and sediment ● Clean tank.

in tank.

Relief valve Pressure build up ● This is an unacceptable condition and must be
producing popping caused by thermal corrected. Contact the water supplier or plumbing
noise or draining expansion to a contractor on how to correct this. Do not plug the

closed system. relief valve outlet.

Rattling noise Internal heat trap ● This is normal for heat trap fittings when in operation
during periods of fittings in operation. and does not indicate a need for service.

water usage

Not enough or Water usage may have ● Wait for the water heater to recover after an abnormal
no hot water exceeded the capacity demand.

of the water heater.
Low gas pressure. ● Check gas supply pressure and manifold pressure.
The pilot may be out. ● Check the pilot. If necessary, relight using the

instructions in the Lighting the water heater section
of this manual.

The thermostat may ● See the Temperature regulation of the water heater
be set too low. section of this manual.

Leaking or open hot ● Make sure all faucets are closed.
water faucets.

Cold water inlet ● This is normal. The colder inlet water takes longer
temperature may be to heat.
colder during the
winter months.

Water is too hot The thermostat ● See the Temperature regulation of the water heater

is set too high. section of this manual.

CAUTION: For your safety DO NOT attempt repair of gas piping, thermostat, burners, vent connectors or other

safety devices. Refer repairs to qualified service personnel.

Customer Service Troubleshooting Tips Care and Cleaning Operating Instructions Installation Instructions Safety Instructions

22

Replacement Parts.

For 30, 40 and 50 gallon models using natural or LP gas.

Instructions For Placing a Parts Order

To place orders using a Visa/MasterCard
call 800-431-1549.

All parts orders should include:

The model and serial number of the
water heater from the rating plate.

Specify type of gas (natural or LP)
as marked on the rating plate.

Part description (as noted below)
and number of parts desired.

CAUTION: For your safety DO
NOT attempt repair of gas piping,
thermostat, burners, vent connectors
or other safety devices. Refer repairs
to qualified service personnel.

Draft hood

Temperature and
pressure relief valve

Drain valve shroud

Burner supply tube

Inner door

Flue baffle

hanger

Anode rod

Dip tube

Dip tube
gasket

Pilot
supply
tube

Thermocouple

Drain valve

Thermostat

Burner

Pilot

burner

Burner orifice

Jacket door

For models equipped with

IGNITION SYSTEM

SmartWater

™

Thermostat

Striker Assembly

Mounting Bracket

Pilot Tube

Thermocouple

Pilot Burner Assembly
(Includes Igniter and Cable ass’y)

23

Rheem Manufacturing Company

Warranty Registration Department
P.O. Box 34070
Louisville, KY 40232-4070

Please place in envelope and mail to:

✁

Cut here

✁

Cut here

24

✁

Cut here

Consumer Product Ownership Registration

Follow these three steps to protect your
new appliance investment:

If you require service, call 800-431-1549.

123

Model Number Serial Number

Consumer Product Ownership Registration

Model NumberWater Heater Serial Number

Important

Mail
Today!

First

Name

Mr. ■■ Ms. ■■ Mrs. ■■ Miss ■■

Street

Address

City

State

Date Placed

In Use

Month

Day

Year

Zip

Code

Apt. #

Last

Name

Phone

Number

__

Complete and mail
this Consumer
Product Ownership
Registration today.

After mailing the
registration below,
store this document
in a safe place. It
contains information
you will need should
you require service.

Read your Owner's
Manual carefully.
It will help you
operate your new
appliance properly.