Your Heater DH 1050 User manual

Your Heater DH 1050 User manual

Instruction Manual

coMMercIal Gas water heaters

Models Bt-80, Bt-100 series 300, 301

InstallatIon - operatIon - servIce

- MaIntenance - lIMIted warrantY

500 Tennessee Waltz Parkway

Ashland city, TN 37015

Low Lead Content

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

Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

WHAT TO DO IF YOU SMELL GAS:

Do not try to light any appliance.

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

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

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

Installation and service must be performed by a qualified installer, service agency or the gas supplier.

Read and understand this instruction manual and the safety messages herein before installing, operating or servicing this water heater.

Failure to follow these instructions and safety messages could result in death or serious injury.

This manual must remain with the water heater.

• for Your safety

AN ODORANT IS ADDED TO THE GAS USED

BY THIS WATER HEATER.

PlAcE THESE INSTRUcTIONS ADjAcENT TO HEATER AND NOTIfY OWNER TO kEEP fOR fUTURE REfERENcE.

PRINTED 0612

Keep thIs Manual In the pocKet on heater for future reference whenever MaIntenance adjustMent or servIce Is requIred.

1

315627-001

taBle of contents

SAfE INSTAllATION, USE AND SERVIcE......................3

APPROVAlS ......................................................................3

GENERAl SAfETY INfORMATION ..................................4

INTRODUcTION ................................................................5

Abbreviations Used .....................................................5

Qualified Installer or Service Agency ...........................5

Preparing for the New Installation ...............................5

INSTAllATION cONSIDERATIONS ............................. 6-9

Rough In Dimensions ..................................................6

Thermometers .............................................................7

Facts to Consider About Location ...............................7

High Altitude ................................................................8

Clearances ..................................................................8

Insulation Blankets ......................................................9

Hard Water ..................................................................9

Circulation Pumps .......................................................9

INSTAllATION REqUIREMENTS ..................................10

Gas Supply Systems .................................................10

Gas Pressure Requirements .....................................10

Supply Gas Regulator ...............................................10

Mixing Valves ............................................................10

Water Piping .............................................................. 11

Closed Water Systems .............................................. 11

Thermal Expansion ................................................... 11

Temperature - Pressure Relief Valve ......................... 11

Filling the Water Heater .............................................12

Air Requirements .......................................................12

Unconfined Space .....................................................13

Confined Space .........................................................13

Fresh Air Openings for Confined Spaces ..................13

Outdoor Air Through Two Openings ..........................13

Outdoor Air Through One Opening ...........................13

Outdoor Air Through Two Horizontal Ducts ...............14

Outdoor Air Through Two Vertical Ducts ...................14

Air From Other Indoor Spaces ..................................14

Venting ......................................................................14

Supply Gas Regulator ...............................................15

Gas Piping .................................................................16

Sediment Traps .........................................................17

lIGHTING & OPERATING INSTRUcTIONS ..............18,19

TEMPERATURE REGUlATION ......................................20

fOR YOUR INfORMATION .............................................20

Start Up conditions ...................................................20

Operational conditions ..............................................21

PERIODIc MAINTENANcE .............................................22

Venting System Inspection ........................................22

Burner Inspection ......................................................22

Burner Cleaning ........................................................22

Housekeeping ...........................................................23

Anode Rod Inspection ...............................................23

Temperature-Pressure Relief Valve Test ...................23

REcOMMENDED PROcEDURE fOR PERIODIc

REMOVAl Of lIME DEPOSITS fROM TANk

TYPE cOMMERcIAl WATER HEATERS ........................23

Deliming Solvents ......................................................24

Tank Cleanout Procedure ..........................................24

Deliming Using Flo-Jug Method ................................24

Draining and Flushing ...............................................25

Service ......................................................................25

lEAkAGE cHEckPOINTS ..............................................26

TROUBlESHOOTING GUIDElINES ...............................27

WATER PIPING DIAGRAMS .......................................28-33

NOTES .............................................................................34

WARRANTY .....................................................................35

2

safe InstallatIon, use and servIce

The proper installation, use and servicing of this water heater is extremely important to your safety and the safety of others.

Many safety-related messages and instructions have been provided in this manual and on your own water heater to warn you and others of a potential injury hazard. Read and obey all safety messages and instructions throughout this manual. It is very important that the meaning of each safety message is understood by you and others who install, use, or service this water heater.

This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.

DANGER

WARNING

CAUTION

CAUTION

DANGER indicates an imminently hazardous situation which, if not avoided, will result in injury or death.

WARNING indicates a potentially hazardous situation which, if not avoided, could result in injury or death.

CAUTION indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury.

CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not avoided, could result in property damage.

All safety messages will generally tell you about the type of hazard, what can happen if you do not follow the safety message, and how to avoid the risk of injury.

The California Safe Drinking Water and Toxic Enforcement Act requires the Governor of California to publish a list of substances known to the State of California to cause cancer, birth defects, or other reproductive harm, and requires businesses to warn of potential exposure to such substances.

This product contains a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm. This water heater can cause low level exposure to some of the substances listed in the Act.

approvals

Low Lead Content

3

General safetY InforMatIon

4

IntroductIon

Thank You for purchasing this water heater. Properly installed and maintained, it should give you years of trouble free service.

aBBrevIatIons used

Abbreviations Found In This Instruction Manual:

• UL - Underwriters Laboratories Inc.

• ANSI - American National Standards Institute

• NFPA - National Fire Protection Association

• ASME - American Society of Mechanical Engineers

• AHRI - Air-Conditioning, Heating and Refrigeration Institute

• CAN - Canada

• EPACT - Energy Policy Act

• CSA - Canadian Standards Association

This gas-fired water heater is design certified by Underwriters

Laboratories Inc. under American National Standard/CSA Standard for Gas Water Heaters ANSI Z21.10.3 • CSA 4.3 (current edition).

qualIfIed Installer or servIce aGencY

Installation and service of this water heater requires ability equivalent to that of a Qualified Agency (as defined by ANSI below) in the field involved. Installation skills such as plumbing, air supply, venting, gas supply and electrical supply are required in addition to electrical testing skills when performing service.

ANSI Z223.1 2006 Sec. 3.3.83: “Qualified Agency” - “Any individual, firm, corporation or company that either in person or through a representative is engaged in and is responsible for (a) the installation, testing or replacement of gas piping or (b) the connection, installation, testing, repair or servicing of appliances and equipment; that is experienced in such work; that is familiar with all precautions required; and that has complied with all the requirements of the authority having jurisdiction.”

If you are not qualified (as defined by ANSI above) and licensed or certified as required by the authority having jurisdiction to perform a given task do not attempt to perform any of the procedures described in this manual. If you do not understand the instructions given in this manual do not attempt to perform any procedures outlined in this manual.

preparInG for the InstallatIon

1. Read the “General Safety” section, page 4 of this manual first and then the entire manual carefully. If you don’t follow the safety rules, the water heater will not operate properly.

It could cause DEATH, SERIOUS BODILY INJURY AND/OR

PROPERTY DAMAGE.

This manual contains instructions for the installation, operation, and maintenance of the gas-fired water heater. It also contains warnings throughout the manual that you must read and be aware of. All warnings and all instructions are essential to the proper operation of the water heater and your safety. Since we cannot put everything on the first few pages,

READ THE ENTIRE MANUAl BEfORE ATTEMPTING TO

INSTAll OR OPERATE THE WATER HEATER.

2. The installation must conform with these instructions and the local code authority having jurisdiction. In the absence of local codes, the installation must comply with the current editions of the National Fuel Gas Code, ANSI Z223.1/

NFPA 54 or CAN/CSA-B149.1 the Natural Gas and Propane

Installation Code. All documents are available from the

Canadian Standards Association, 8501 East Pleasant Valley

Road, Cleveland, OH 44131. NFPA documents are also available from the National Fire Protection Association, 1

Batterymarch Park, Quincy, MA 02269.

3. If after reading this manual you have any questions or do not understand any portion of the instructions, call the local gas utility or the manufacturer whose name appears on the rating plate.

4. Carefully plan the place where you are going to put the water heater. Correct combustion, vent action, and vent pipe installation are very important in preventing death from possible carbon monoxide poisoning and fires, see Figures

3 and 7.

Examine the location to ensure the water heater complies with the “Locating the New Water Heater” section in this manual.

5. For California installation this water heater must be braced, anchored, or strapped to avoid falling or moving during an earthquake. See instructions for correct installation procedures. Instructions may be obtained from California

Office of the State Architect, 400 P Street, Sacramento, cA 95814.

6. Massachusetts Code requires this water heater to be installed in accordance with Massachusetts 248-CMR 2.00: State

Plumbing Code and 248-CMR 5.00.

5

rouGh In dIMensIons

InstallatIon consIderatIons

fIGure 1.

taBle 1. dIMensIons and recoverY ratInGs

Model

BT-80

Natural & lP

BT-100

Natural & lP

units

Inches cM

Inches cM

a

61 1/8

155.25

68 5/8

174.3

B

58 1/2

148.6

66 1/2

168.9

c dIMensIons

29 11/16

75.4

30 15/16

78.59

d

26 1/2

67.3

27 3/4

70.5

e

15 3/16

38.6

15 3/16

38.6

f

4

10.2

4

10.2

G

14 1/2

39.4

15 3/4

40.0

h

16

40.6

16

40.6

j

1 1/4

3.2

1 1/4

3.2

K

1

NPT

1 1/4

NPT

l

1/2

NPT

1/2

NPT

M

11 15/16

30.3

11 15/16

30.3

recoverY ratInGs

Model

BT-80

BT-100

Input

rating

Btu/hr

75,100

75,100

rating kw

22

22

approx.

Gal. cap.

74

98

approx. liter cap.

280

371

temp. rise

c° 17 22 28 33 39 44 50 56 61 67 72 78

GPH lPH

GPH lPH f° 30 40 50 60 70 80

243 182 146 121 104 91

90

81

100 110 120 130 140

73 66 61 56 52

916 686 550 456 392 343 305 275 249 230 211 196

243 182 146 121 104 91 81 73 66 61 56 52

916 686 550 456 392 343 305 275 249 230 211 196

Recovery ratings based on 80% thermal efficiency.

6

therMoMeters (not supplied)

Thermometers should be obtained and field installed.

Thermometers are installed in the system as a means of detecting the temperature of the outlet water supply.

the structure. For this reason, it is not advisable to install water heater in an attic or upper floor. When such locations cannot be avoided, a suitable metal drain pan should be installed under the water heater.

Metal Drain pans are available at your local hardware store. Such a metal drain pan must have a minimum length and width of at least

2” (51 mm) greater than water heater dimensions and must be piped to an adequate drain. The pan must not restrict combustion air flow.

Water heater life depends upon water quality, water pressure and the environment in which the water heater is installed. Water heaters are sometimes installed in locations where leakage may result in property damage, even with the use of a drain pan piped to a drain. However, unanticipated damage can be reduced or prevented by a leak detector or water shut-off device used in conjunction with a piped drain pan.

These devices are available from some plumbing supply wholesalers and retailers, and detect and react to leakage in various ways:

• Sensors mounted in the drain pan that trigger an alarm or turn off the incoming water to the water heater when leakage is detected.

• Sensors mounted in the drain pan that turn off the water supply to the entire home when water is detected in the drain pan.

• Water supply shut-off devices that activate based on the water pressure differential between the cold water and hot water pipes connected to the water heater.

• Devices that will turn off the gas supply to a gas water heater while at the same time shutting off its water supply .

This Water Heater has been design certified as complying with

ANSI Z21.10.3-CSA 4.3 current edition for water heaters and is considered suitable for:

Water (Potable) Heating and Space Heating: All models are considered suitable for water (potable) heating and space heating.

HOTTER WATER CAN SCALD:

Water heaters are intended to produce hot water. Water heated to a temperature which will satisfy space heating, clothes washing, dish washing, and other sanitizing needs can scald and permanently injure you upon contact. Some people are more likely to be permanently injured by hot water than others. These include the elderly, children, the infirm, or physically/mentally handicapped. If anyone using hot water in your home fits into one of these groups or if there is a local code requiring a certain temperature water at the hot water tap, then you must take special precautions. In addition to using the lowest possible temperature setting that satisfies your hot water needs, a means such as a *Mixing Valve should be used at the hot water taps used by these people or at the water heater. Mixing valves are available at plumbing supply or hardware stores. Consult a qualified installer or service agency. Follow mixing valve manufacturer’s instructions for installation of valves. Before changing the factory setting on the thermostat, read the “Temperature Regulation” section in this manual, see Figures 17 and 18.

facts to consIder aBout the locatIon

Carefully choose an indoor location for the new water heater, because the placement is a very important consideration for the safety of the occupants in the building and for the most economical use of the water heater. This water heater is not for use in manufactured (mobile) homes or outdoor installation.

Whether replacing an old water heater or putting the water heater in a new location, the following critical points must be observed:

1. Select a location indoors as close as practical to the gas vent or chimney to which the water heater vent is going to be connected, and as centralized with the water piping system as possible.

2. Selected location must provide adequate clearances for servicing and proper operation of the water heater.

Installation of water heater must be accomplished in such a manner that if the tank or any connections should leak, flow will not cause damage to

7

INSTAllATIONS IN AREAS WHERE flAMMABlE lIqUIDS

(VAPORS) ARE LIKELY TO BE PRESENT OR STORED (GARAGES,

STORAGE AND UTILITY AREAS, ETC.): Flammable liquids (such as gasoline, solvents, propane [LP or butane, etc.] and other substances such as adhesives, etc.) emit flammable vapors which can be ignited by a gas water heater’s pilot light or main burner. The resulting flashback and fire can cause death or serious burns to anyone in the area, as well as property damage. If installation in such areas is your only option, then installation must be accomplished in a way that the pilot flame and main burner flame are elevated from floor at least 18 inches. While this may reduce chances of flammable vapors, from a floor spill being ignited, gasoline and other flammable substances should never be stored or

used in the same room or area containing a gas water heater or other open flame or spark producing appliance. NOTE: Flammable vapors may be drawn by air currents from other areas of the structure to the appliance.

Also, the water heater must be located and/or protected so it is not subject to physical damage by a moving vehicle.

clearances

Minimum clearances between the water heater and combustible construction are 0 inch at the sides and rear, 4” (102 mm) at the front, and 6” (153 mm) from the vent pipe. Clearance from the top of the jacket is 12” (305 mm) on most models.

fIGure 2.

This water heater must not be installed directly on carpeting. Carpeting must be protected by metal or wood panel beneath the water heater extending beyond the full width and depth of the water heater by at least

3” (76.2 mm) in any direction, or if the water heater is installed in an alcove or closet, the entire floor must be covered by the panel. Failure to heed this warning may result in a fire hazard.

hIGh altItude

A gas water heater cannot operate properly without the correct amount of air for combustion. Do not install in a confined area such as a closet, unless you provide air as shown in the “Locating The

New Water Heater” section. Never obstruct the flow of ventilation air. If you have any doubts or questions at all, call your gas supplier.

Failure to provide the proper amount of combustion air can result in a fire or explosion and cause death, serious bodily injury, or property damage.

Water heaters covered in this manual have been tested and approved for installation at elevations up to 7,700 feet (2,347 m) above sea level. For installation above 7,700 feet (2,347 m), the water heater’s

Btu input should be reduced at the rate of 4 percent for each 1,000 feet (305 m) above sea level which requires replacement of the burner orifice in accordance with the National Fuel Gas Code ANSI Z223.1/

NFPA 54 or the Natural Gas and Propane Installation Code CAN/

CSA B149.1. Contact your local gas supplier for further information.

Failure to replace the standard orifice with the proper high altitude orifice when installed at elevations above 7,700 feet (2,347 m) could result in improper and inefficient operation of the water heater, producing carbon monoxide gas in excess of the safe limits. This could result in serious injury or death. Contact your local gas supplier for any specific changes that may be required in your area.

8

fIGure 3.

If this water heater will be used in beauty shops, barber shops, cleaning establishments, or self-service laundries with dry cleaning equipment, it is imperative that the water heater or water heaters be installed so that combustion and ventilation air be taken from outside these areas.

Propellants of aerosol sprays and volatile compounds, (cleaners, chlorine based chemicals, refrigerants, etc.) in addition to being highly flammable in many cases, will also change to corrosive hydrochloric acid when exposed to the combustion products of the water heater. The results can be hazardous, and also cause product failure.

InsulatIon BlanKets

Breathing Hazard - Carbon Monoxide Gas

Do not obstruct water heater air intake with insulating blanket.

Gas and carbon monoxide detectors are available.

Install water heater in accordance with the instruction manual.

Breathing carbon monoxide can cause brain damage or death. Always read and understand instruction manual.

Insulation blankets are available to the general public for external use on gas water heaters but are not necessary with these products. The purpose of an insulation blanket is to reduce the standby heat loss encountered with storage tank heaters. The water heaters covered by this manual meet or exceed the Energy Policy Act standards with respect to insulation and standby heat loss requirements, making an insulation blanket unnecessary.

Should you choose to apply an insulation blanket to this heater, you should follow these instructions. See the Features and Components section of this manual 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 thermostat or the Temperature-

Pressure Relief Valve.

do not

allow the insulation to come within 2 inches (5 cm) 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 the manufacturer for placement on the blanket directly over the existing labels.

do

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

hard water

Where hard water conditions exist, water softening or the threshold type of water treatment is recommended. This will protect the dishwashers, coffee urns, water heaters, water piping and other equipment. See the Maintenance Section in this manual for sediment and lime scale removal procedures.

cIrculatIon puMps

A circulating pump is used when a system requires a circulating loop or there is a storage tank used in conjunction with the water heater. See Water Piping Diagrams in this manual for installation location of circulating pumps.

See the Circulation Pump Wiring Diagrams below for electrical hookup information. Install in accordance with the current edition of the National Electrical Code, NFPA 70 or the

Canadian Electrical Code, CSA C22.1.

All bronze or stainless steel circulating pumps are recommended for used with commercial water heaters.

Some circulating pumps are manufactured with sealed bearings and do not require further lubrication. Some circulating pumps must be periodically oiled. Refer to the pump manufacturer’s instructions for lubrication requirements.

CIRCULATING PUMP WIRING DIAGRAM

STORAGE TANK OR BUILDING RECIRCULATION

NOTE:

USE SEPARATE 120 VAC POWER

SUPPLY FOR PUMP CIRCUIT. DO NOT

SHARE POWER WITH APPLIANCE AS THIS

MAY CAUSE ELECTRICAL LINE NOISE AND

LEAD TO ERRATIC CONTROL SYSTEM

OPERATION.

L1 HOT

FIELD SUPPLIED TEMPERATURE CONTROL

INSTALLED IN THE STORAGE TANK

OR CIRCULATING LOOP RETURN LINE

120 VAC

POWER

CIRC

PUMP

MOTOR

L2 NEUTRAL

fIGure 4.

CIRCULATING PUMP WIRING DIAGRAM

DISHWASHER LOOP WITH TOGGLE SWITCH

DISHWASHER

TOGGLE

SWITCH

NOTE:

USE SEPARATE 120 VAC POWER

SUPPLY FOR PUMP CIRCUIT. DO NOT

SHARE POWER WITH APPLIANCE AS THIS

MAY CAUSE ELECTRICAL LINE NOISE AND

LEAD TO ERRATIC CONTROL SYSTEM

OPERATION.

L1 HOT

FIELD SUPPLIED TEMPERATURE

CONTROL INSTALLED IN THE

CIRCULATING LOOP RETURN LINE

120 VAC

POWER

CIRC

PUMP

MOTOR

L2 NEUTRAL

fIGure 5.

9

InstallatIon requIreMents

Gas supplY sYsteMs MIxInG valves

Low pressure building gas supply systems are defined as those systems that cannot under any circumstances exceed 14” W.C.

(1/2 PSI Gauge). These systems do not require pressure regulation.

Measurements should be taken to insure that gas pressures are stable and fall within the requirements stated on the water heater rating plate. readings should be taken with all gas burning equipment off (static pressure) and with all gas burning equipment running at maximum rate

(dynamic pressure). The gas supply pressure must be stable within 1.5”

W.C. from static to dynamic pressure to provide good performance.

Pressure drops that exceed 1.5” W.C. may cause rough starting, noisy combustion or nuisance outages. Increases or spikes in static pressure during off cycles may cause failure to ignite or in severe cases damage to appliance gas valves. If your low pressure system does not meet these requirements, the installer is responsible for the corrections.

High Pressure building supply systems use pressures that exceed

14” W.C. (1/2 PSI Gauge). These systems must use field supplied regulators to lower the gas pressure to less than 14” W.C. (1/2 PSI

Gauge). Appliances require gas regulators that are properly sized for the water heater input and deliver the rating plate specified pressures. Gas supply systems where pressure exceeds 5 PSI often require multiple regulators to achieve desired pressures. Systems in excess of 5 PSI building pressure should be designed by gas delivery professionals for best performance. Water heaters connected to gas supply systems that exceed 14” W.C. (1/2 PSI Gauge) at any time must be equipped with a gas supply regulator.

Gas pressure requIreMents supplY Gas reGulator

Water temperature over 125°F (52°C) can cause severe burns instantly resulting in severe injury or death.

Children, the elderly and the physically or mentally disabled are at highest risk for scald injury.

Feel water before bathing or showering.

Temperature limiting devices such as mixing valves must be installed when required by codes and to ensure safe temperatures at fixtures.

Water heated to a temperature which will satisfy clothes washing, dish washing, and other sanitizing needs can scald and cause permanent injury upon contact. Short repeated heating cycles caused by small hot water uses can cause temperatures at the point of use to exceed the water heater’s temperature setting by up to 20°F (11°C).

Some people are more likely to be permanently injured by hot water than others. These include the elderly, children, the infirm and the physically/mentally disabled. Table 2 shows the approximate timeto-burn relationship for normal adult skin. If anyone using hot water provided by the water heater being installed fits into one of these groups or if there is a local code or state law requiring a certain water temperature at the point of use, then special precautions must be taken.

In addition to using the lowest possible temperature setting that satisfies demand of the application a Mixing Valve should be installed at the water heater or at hot water taps to further reduce system water temperature. See Figure 6.

Mixing valves are available at plumbing supply stores. Consult a Qualified Installer or Service Agency. Follow mixing valve manufacturer’s instructions for installation of the valves.

Natural gas models require a minimum gas supply pressure of 4.5”

W.C. (1.12 kPa). Propane gas models require a minimum gas supply pressure of 11” W.C. (2.74 kPa). The minimum supply pressure is measured while gas is flowing (dynamic pressure). The supply pressure (dynamic) should never fall below the specified minimum supply pressure. The supply pressure should be measured with all gas fired appliances connected to the common main firing at full capacity. If the supply pressure drops more than 1.5” W.C. (0.37 kPa) as gas begins to flow to the water heater then the supply gas system including the gas line and/or the gas regulator may be restricted or undersized. See

Supply Gas regulator section and Gas Piping section of this manual.

The gas valve on all models has a maximum gas supply pressure limit of 14” W.C. (3.48 kPa) The maximum supply pressure is measured while gas is not flowing (static pressure).

The maximum allowable gas supply pressure for this water heater is 14.0 inches W.C. (3.48 kPa). Install a positive lock-up gas pressure regulator in the gas supply line if inlet gas pressure can exceed 14.0 inches W.C. (3.48 kPa) at any time. regulators must be sized/used according to manufacturer’s specifications.

If a positive lock-up regulator is required follow these instructions:

1. Positive lock-up gas pressure regulators must be rated at or above

the input Btu/hr rating of the water heater they supply.

2. Positive lock-up gas pressure regulator(s) should be installed no

closer than 3 feet (1 meter) and no farther than 8 feet (2.4 meters)

of equivalent length from the water heater’s inlet gas connection.

3. After installing the positive lock-up gas pressure regulator(s) an initial

nominal supply pressure setting of 7.0” W.C. while the water heater

is operating is recommended and will generally provide good

water heater operation. Some addition adjustment maybe required

later to maintain a steady gas supply pressure.

4. When installing multiple water heaters in the same gas supply

system it is recommended that individual positive lock-up gas

pressure regulators be installed at each unit.

10

taBle 2.

Water

Temperature °F

Time for

1st Degree Burn

(Less Severe Burns)

Time for Permanent Burns

2nd & 3rd Degree

(Most Severe Burns)

110

116

116

122

131

(normal shower temp.)

(pain threshold)

35 minutes

1 minute

5 seconds

45 minutes

5 minutes

25 seconds

140

149

154

2 seconds

1 second instantaneous

5 seconds

2 seconds

1 second

(U.S. Government Memorandum, C.P.S.C., Peter L. Armstrong, Sept. 15,1978)

COLD

WATER

INLET

HOT WATER

OUTLET

TEMPERED WATER

OUTLET

CHECK

VALVE

12” TO 15”

(30-38 cm)

CHECK

VALVE

MIXING

VALVE

TO TANK

INLET

fIGure 6.

water pIpInG water (potaBle) heatInG and space heatInG

This water heater shall not be connected to any heating systems or component(s) used with a non-potable water heating appliance.

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

Toxic chemicals, such as those used for boiler treatment shall not be introduced into this system.

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

These water heaters cannot be used in space heating applications only.

closed water sYsteMs

Water supply systems may, because of code requirements or such conditions as high line pressure, among others, have installed devices such as pressure reducing valves, check valves, and back flow preventers. Devices such as these cause the water system to be a closed system.

therMal expansIon

As water is heated, it expands (thermal expansion). In a closed system the volume of water will grow when it is heated. As the volume of water grows there will be a corresponding increase in water pressure due to thermal expansion. Thermal expansion can cause premature tank failure (leakage). This type of failure is not covered under the limited warranty. Thermal expansion can also cause intermittent Temperature-Pressure Relief Valve operation: water discharged from the valve due to excessive pressure build up. This condition is not covered under the limited warranty. The Temperature-Pressure Relief Valve is not intended for the constant relief of thermal expansion.

A properly sized thermal expansion tank must be installed on all closed systems to control the harmful effects of thermal expansion. Contact a local plumbing service agency to have a thermal expansion tank installed.

fIGure 7.

NOTE: To protect against untimely corrosion of hot and cold water fittings, it is strongly recommended that di-electric unions or couplings be installed on this water heater when connected to copper pipe.

Figure 7 shows the typical attachment of the water piping to the water heater. The water heater is equipped with 1” NPT threaded nipple (75 gallon models) or 1.25” NPT threaded nipple (100 gallon models) water connections.

teMperature-pressure relIef valve

11

Explosion Hazard

Temperature-Pressure Relief Valve must comply with ANSI Z21.22-

CSA 4.4 and ASME code.

Properly sized temperaturepressure relief valve must be installed in opening provided.

Can result in overheating and excessive tank pressure.

Can cause serious injury or death.

This water heater is provided with a properly rated/sized and certified combination Temperature-Pressure Relief Valve (T&P valve) by the manufacturer. The valve is certified by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment of materials as meeting the requirements for Relief Valves for Hot Water Supply Systems,

ANSI Z21.22 • CSA 4.4, and the code requirements of ASME.

If replaced, the new T&P valve must meet the requirements of local codes, but not less than a combination Temperature-Pressure

Relief Valve rated/sized and certified as indicated in the above paragraph. The new valve must be marked with a maximum set pressure not to exceed the marked hydrostatic working pressure of the water heater (150 psi = 1,035 kPa) and a discharge capacity not less than the water heater Btu/hr or kW input rate as shown on the water heater’s model rating label.

NOTE: In addition to the factory installed Temperature-Pressure

Relief Valve on the water heater, each remote storage tank that may be installed and piped to a water heating appliance must also have its own properly sized, rated and approved Temperature-

Pressure Relief Valve installed. Call the toll free technical support phone number listed on the back cover of this manual for technical assistance in sizing a Temperature-Pressure Relief Valve for remote storage tanks.

For safe operation of the water heater, the Temperature-Pressure

Relief Valve must not be removed from its designated opening nor plugged. The Temperature-Pressure Relief Valve must be installed directly into the fitting of the water heater designed for the relief valve.

Install discharge piping so that any discharge will exit the pipe within

6 inches (15.2 cm) above an adequate floor drain, or external to the building. In cold climates it is recommended that it be terminated at an adequate drain inside the building. Be certain that no contact is made with any live electrical part. The discharge opening must not be blocked or reduced in size under any circumstances. Excessive length, over 30 feet (9.14 m), or use of more than four elbows can cause restriction and reduce the discharge capacity of the valve.

No valve or other obstruction is to be placed between the

Temperature-Pressure Relief Valve and the tank. Do not connect discharge piping directly to the drain unless a 6” (15.2 cm) air gap is provided. To prevent bodily injury, hazard to life, or property damage, the relief valve must be allowed to discharge water in adequate quantities should circumstances demand. If the discharge pipe is not connected to a drain or other suitable means, the water flow may cause property damage.

CAUTION

Water Damage Hazard

TemperaturePressure Relief Va lve discharge

pipe must terminate at adequate drain.

t&p valve discharge pipe requirements:

• Shall not be smaller in size than the outlet pipe size of the valve, or have any reducing couplings or other restrictions.

• Shall not be plugged or blocked.

• Shall not be exposed to freezing temperatures.

• Shall be of material listed for hot water distribution.

• Shall be installed so as to allow complete drainage of both the

Temperature-Pressure Relief Valve and the discharge pipe.

• Must terminate a maximum of six inches above a floor drain or external to building. In cold climates, it is recommended that discharge pipe be terminated at an adequate drain inside building.

• Shall not have any valve or other obstruction between the relief valve and the drain.

NOTE: The purpose of a Temperature-Pressure Relief Valve is to prevent excessive temperatures and pressures in the storage tank.

The T&P valve is not intended for the constant relief of thermal expansion. A properly sized thermal expansion tank must be installed on all closed systems to control thermal expansion, see Closed

Water Systems and Thermal Expansion on page 11.

If you do not understand these instructions or have any questions regarding the Temperature-Pressure Relief Valve call the toll free number listed on the back cover of this manual for technical assistance.

fIllInG the water heater

Never use this water heater unless it is completely full of water. To prevent damage to the tank, the tank must be filled with water. Water must flow from the hot water faucet before turning “ON” gas to the water heater.

To fill the water heater with water:

1. Close the water heater drain valve by turning the handle to the right (clockwise). The drain valve is on the lower front of the water heater.

2. Open the cold water supply valve to the water heater.

NOTE: The cold water supply valve must be left open when the water heater is in use.

3. To insure complete filling of the tank, allow air to exit by opening the nearest hot water faucet. Allow water to run until a constant flow is obtained. This will let air out of the water heater and the piping.

4. Check all water piping and connections for leaks. Repair as needed.

aIr requIreMents

Breathing Hazard - Carbon Monoxide Gas

Burn hazard.

Install water heater in accordance with the Instruction Manual and NFPA 54 or

CAN/CSA-B149.1.

To avoid injury, combustion and ventilation air must be taken from outdoors.

Do not place chemical vapor emitting products near water heater.

Hot water discharge.

Keep clear of Temperature-

Pressure Relief Valve discharge outlet.

Breathing carbon monoxide can cause brain damage or death. Always read and understand instruction manual.

For safe operation an adequate supply of fresh uncontaminated air for combustion and ventilation must be provided.

The Temperature-Pressure Relief Valve must be manually operated at least twice a year. Caution should be taken to ensure that (1) no one is in front of or around the outlet of the Temperature-Pressure

Relief Valve discharge line, and (2) the water manually discharged will not cause any bodily injury or property damage because the water may be extremely hot. If after manually operating the valve, it fails to completely reset and continues to release water, immediately close the cold water inlet to the water heater, follow the draining instructions in this manual, and replace the Temperature-

Pressure Relief Valve with a properly rated/sized new one.

An insufficient supply of air can cause recirculation of combustion products resulting in contamination that may be hazardous to life.

Such a condition often will result in a yellow, luminous burner flame, causing sooting of the combustion chamber, burners and flue tubes and creates a risk of asphyxiation.

Do not install the water heater in a confined space unless an adequate supply of air for combustion and ventilation is brought in to that space using the methods described in the Confined Space section that follows.

12

Never obstruct the flow of ventilation air. If you have any doubts or questions at all, call your gas supplier. Failure to provide the proper

amount of combustion air can result in a fire or explosion and cause property damage, serious bodily injury or death.

outdoor aIr throuGh two openInGs unconfIned space

An Unconfined Space is one whose volume is not less than 50 cubic feet per 1,000 Btu/hr (4.8 cubic meters per kW) of the total input rating of all appliances installed in the space. Rooms communicating directly with the space, in which the appliances are installed, through openings not furnished with doors, are considered a part of the unconfined space.

Makeup air requirements for the operation of exhaust fans, kitchen ventilation systems, clothes dryers and fireplaces shall also be considered in determining the adequacy of a space to provide combustion, ventilation and dilution air.

unusuallY tIGht constructIon

In unconfined spaces in buildings, infiltration may be adequate to provide air for combustion, ventilation and dilution of flue gases.

However, in buildings of unusually tight construction (for example, weather stripping, heavily insulated, caulked, vapor barrier, etc.) additional air must be provided using the methods described in the Confined Space section that follows.

confIned space fIGure 8.

A Confined Space is one whose volume is less than 50 cubic feet per

1,000 Btu/hr (4.8 cubic meters per kW) of the total input rating of all appliances installed in the space.

Openings must be installed to provide fresh air for combustion, ventilation and dilution in confined spaces. The required size for the openings is dependent on the method used to provide fresh air to the confined space and the total Btu/hr input rating of all appliances installed in the space.

dIrect vent applIances

Appliances installed in a Direct Vent configuration that derive all air for combustion from the outdoor atmosphere through sealed intake air piping are not factored in the total appliance input Btu/hr calculations used to determine the size of openings providing fresh air into confined spaces.

exhaust fans

Where exhaust fans are installed, additional air shall be provided to replace the exhausted air. When an exhaust fan is installed in the same space with a water heater, sufficient openings to provide fresh air must be provided that accommodate the requirements for all appliances in the room and the exhaust fan. Undersized openings will cause air to be drawn into the room through the water heater’s vent system causing poor combustion. Sooting, serious damage to the water heater and the risk of fire or explosion may result. It can also create a risk of asphyxiation.

The confined space shall be provided with two permanent openings, one commencing within 12 inches (300 mm) of the top and one commencing within 12 inches (300 mm) of the bottom of the enclosure. The openings shall communicate directly with the outdoors. See Figure 8.

Each opening shall have a minimum free area of 1 square inch per

4,000 Btu/hr (550 mm2 per kW) of the aggregate input rating of all appliances installed in the enclosure. Each opening shall not be less than 100 square inches (645 cm2).

outdoor aIr throuGh one openInG louvers and GrIlles

The free areas of the fresh air openings in the instructions that follow do not take in to account the presence of louvers, grilles or screens in the openings.

The required size of openings for combustion, ventilation and dilution air shall be based on the “net free area” of each opening. Where the free area through a design of louver or grille or screen is known, it shall be used in calculating the size of opening required to provide the free area specified. Where the louver and grille design and free area are not known, it shall be assumed that wood louvers will have 25% free area and metal louvers and grilles will have 75% free area. Non motorized louvers and grilles shall be fixed in the open position.

fresh aIr openInGs for confIned spaces fIGure 9.

The following instructions shall be used to calculate the size, number and placement of openings providing fresh air for combustion, ventilation and dilution in confined spaces. The illustrations shown in this section of the manual are a reference for the openings that provide fresh air into confined spaces only. Do not refer to these illustrations for the purpose of vent installation. See Venting Installation on page 18 for complete venting installation instructions.

13

Alternatively a single permanent opening, commencing within 12 inches (300 mm) of the top of the enclosure, shall be provided. See

Figure 9. The water heater shall have clearances of at least 1 inch

(25 mm) from the sides and back and 6 inches (150 mm) from the front of the appliance. The opening shall directly communicate with the outdoors or shall communicate through a vertical or horizontal duct to the outdoors or spaces that freely communicate with the outdoors and shall have a minimum free area of the following:

1. 1 square inch per 3000 Btu/hr (733 mm

2

per kW) of the total input rating of all appliances located in the enclosure, and

2. Not less than the sum of the areas of all vent connectors in the space.

outdoor aIr throuGh two horIzontal ducts

enclosure. The vertical ducts shall communicate directly with the outdoors. See Figure 11.

Each duct opening shall have a minimum free area of 1 square inch per 4,000 Btu/hr (550 mm2 per kW) of the aggregate input rating of all appliances installed in the enclosure.

When ducts are used, they shall be of the same cross sectional area as the free area of the openings to which they connect. The minimum dimension of rectangular air ducts shall be not less than 3 inches.

aIr froM other Indoor spaces fIGure 10.

The confined space shall be provided with two permanent horizontal ducts, one commencing within 12 inches (300 mm) of the top and one commencing within 12 inches (300 mm) of the bottom of the enclosure. The horizontal ducts shall communicate directly with the outdoors. See Figure 10.

Each duct opening shall have a minimum free area of 1 square inch per 2,000 Btu/hr (1100 mm2 per kW) of the aggregate input rating of all appliances installed in the enclosure.

When ducts are used, they shall be of the same cross sectional area as the free area of the openings to which they connect. The minimum dimension of rectangular air ducts shall be not less than 3 inches.

outdoor aIr throuGh two vertIcal ducts

The illustrations shown in this section of the manual are a reference for the openings that provide fresh air into confined spaces only.

do not

refer to these illustrations for the purpose of vent installation. See Venting Installation on page 18 for complete venting installation instructions.

fIGure 12.

The confined space shall be provided with two permanent openings, one commencing within 12 inches (300 mm) of the top and one commencing within 12 inches (300 mm) of the bottom of the enclosure.

See Figure 12.

Each opening shall communicate directly with an additional room(s) of sufficient volume so that the combined volume of all spaces meets the criteria for an Unconfined Space.

Each opening shall have a minimum free area of 1 square inch per

1,000 Btu/hr (2200 mm2 per kW) of the aggregate input rating of all appliances installed in the enclosure. Each opening shall not be less than 100 square inches (645 cm2).

ventInG fIGure 11.

The confined space shall be provided with two permanent vertical ducts, one commencing within 12 inches (300 mm) of the top and one commencing within 12 inches (300 mm) of the bottom of the

14

If the water heater is being installed as a replacement for an existing heater in pre-existing venting, a thorough inspection of existing venting system must be performed prior to any installation work.

VENT DAMPERS - Any vent damper, whether it is operated thermally or otherwise must be removed if its use inhibits proper drafting of the water heater.

Thermally Operated Vent Dampers: this gas-fired water heater has a thermal efficiency at or above 80% which may produce a relatively low flue gas temperature. Such temperatures may not be high enough to properly open thermally operated vent dampers. This would cause spillage of the flue gases and may cause carbon monoxide poisoning.

Vent dampers must bear evidence of certification as complying with the current edition of the American National Standard ANSI Z21.66

CGA 6.14 (covering electrically and mechanically actuated vent dampers). Before installation of any vent damper, consult the local gas utility for further information.

To insure proper venting of this gas-fired water heater, the correct vent pipe diameter must be utilized. Any additions or deletions of other gas appliances on a common vent with this water heater may adversely affect the operation of the water heater. Consult your gas supplier if any such changes are planned.

For proper venting in certain installations, a larger diameter vent pipe may be necessary. Consult your gas supplier to aid you in determining the proper venting for your water heater from the vent tables in the current edition of the National Fuel Gas Code ANSI

Z223.1/NFPA 54 or the Natural Gas and Propane Installation Code cAN\cSA B 149.1.

Periodically check the venting system for signs of obstruction or deterioration and replace if needed.

The combustion and ventilation air flow must not be obstructed.

The water heater with draft hood installed must be connected to a chimney or listed vent pipe system, which terminates to the outdoors.

Never operate the water heater unless it is vented to the outdoors and has adequate air supply to avoid risks of improper operation, explosion or asphyxiation.

• For proper draft hood attachment, the draft hood legs may be angled slightly inward.

• Place the draft hood legs in the receiving holes on the top of the water heater. The legs will snap in the holes to give a tight fit.

Secure draft hood with the supplied brackets.

• Place the vent pipe over the draft hood. With the vent pipe in position, drill a small hole through both the vent pipe and draft hood. Secure them together with a sheet metal screw. See Figure 13.

Obstructed or deteriorated vent systems may present serious health risk or asphyxiation.

The vent pipe from the water heater must be no less than the diameter of the draft hood outlet on the water heater and must slope upward at least 1/4 inch per linear foot (21 mm per meter).

See Figure 14.

All vent gases must be completely vented to the outdoors of the structure (dwelling). Install only the draft hood provided with the new water heater and no other draft hood.

Vent pipes must be secured at each joint with sheet metal screws.

fIGure 14.

There must be a minimum of 6” (153 mm) clearance between single wall vent pipe and any combustible material. Fill and seal any clearance between single wall vent pipe and combustible material with mortar mix, cement, or other noncombustible substance. For other than single wall, follow vent pipe manufacturer’s clearance specifications. To insure a tight fit of the vent pipe in a brick chimney, seal around the vent pipe with mortar mix cement.

Failure to have required clearances between vent piping and combustible material will result in a fire hazard.

Be sure vent pipe is properly connected to prevent escape of dangerous flue gases which could cause deadly asphyxiation.

fIGure 13.

Chemical vapor corrosion of the flue and vent system may occur if air for combustion contains certain chemical vapors. Spray can propellants, cleaning solvents, refrigerator and air conditioner refrigerants, swimming pool chemicals, calcium and sodium chloride, waxes, bleach and process chemicals are typical compounds which are potentially corrosive.

15

Gas pIpInG

1/2

"

15

13

12

11

10

18

17

16

51

35

28

24

21

19

lenGth

In

Meters

15

18

21

24

27

3

6

9

12

31

38

46

53

61

taBle 4.

3/4

"

30

27

25

23

21

37

35

32

105

73

59

50

44

40

noMInal Iron pIpe sIzes (Inches)

Input In Kw

1

"

1 1/4

"

1 1/2

"

2

"

2 1/2

"

220

202

190

182

161

146

135

126

615

428

346

290

264

237

143

135

126

117

105

95

88

82

410

278

225

193

170

155

57

51

47

42

40

70

64

60

199

142

110

94

83

76

410

381

357

337

299

278

249

234

1160

805

644

556

492

445

659

600

571

542

483

439

401

375

1845

1277

1031

878

776

703

3

"

1142

1083

1010

952

864

776

717

688

3221

2255

1830

1552

1391

1259

Contact your local gas service company to ensure that adequate gas service is available and to review applicable installation codes for your area.

Size the main gas line in accordance with Table 3. The figures shown are for straight lengths of pipe at 0.5 in. W.C. pressure drop, which is considered normal for low pressure systems. Note: Fittings such as elbows, tees and line regulators will add to the pipe pressure drop.

Also refer to the current editions of the National Fuel Gas Code (NFPA

54) or Natural Gas and Propane Installation Code (CAN/CSA B149.1).

Make sure gas supplied is same type listed on model rating plate. The inlet gas pressure must not exceed 14 inch water column (2.6 kPa) for natural and propane (L.P.) gas. The minimum inlet gas pressure shown on rating plate is that which will permit firing at rated input.

If the gas control valve is subjected to pressures exceeding 1/2 pound per square inch (3.5 kPa), the damage to the gas control valve could result in a fire or explosion from leaking gas.

If the main gas line shut-off serving all gas appliances is used, also turn “off” the gas at each appliance. Leave all gas appliances shut

“off” until the water heater installation is complete.

A gas line of sufficient size must be run to the water heater. Consult the current edition of National Fuel Gas Code ANSI Z223.1/NFPA 54 or the Natural Gas and Propane Installation Code CAN/CSA B149.1 and your gas supplier concerning pipe size.

There must be:

• A readily accessible manual shut off valve in the gas supply line serving the water heater, and

• A sediment trap ahead of the gas control valve to help prevent dirt and foreign materials from entering the gas control valve.

• A flexible gas connector or a ground joint union between the shut off valve and control valve to permit servicing of the unit.

Be sure to check all the gas piping for leaks before lighting the water heater. Use a soapy water solution, not a match or open flame. Rinse off soapy solution and wipe dry.

The minimum inlet gas pressure shown on the rating plate is that which will permit firing at the rated input.

Use pipe joint compound or teflon tape marked as being resistant to the action of petroleum [Propane (L.P.)] gases.

The water heater and its gas connection must be leak tested before placing the water heater in operation.

The water heater and its individual shut-off valve shall be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 pound per square inch (3.5 kPa). It shall be isolated from the gas supply piping system by closing its individual manual shut-off valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 pound per square inch (3.5 kPa).

Connecting the gas piping to the gas control valve of the water heater can be accomplished by either of the two methods shown in Figures

15 and 16.

4

"

2372

2196

2108

1962

1757

1610

1464

1347

6735

4626

3748

3192

2840

2577

1/2

"

40

37

35

57

53

50

44

175

120

97

82

73

66

61

lenGth

In feet

10

50

60

70

80

90

20

30

40

100

125

150

175

200

3/4

"

84

77

72

118

110

103

93

360

250

200

170

151

138

125

noMInal Iron pIpe sIzes (Inches)

Input In thousands (Btu/hr)

1

"

1 1/4

"

1 1/2

"

2

"

2 1/2

"

690

650

620

550

500

460

430

2100

1460

1180

990

900

810

750

460

430

400

360

325

300

280

1400

950

770

660

580

530

490

220

205

195

175

160

145

135

680

465

375

320

285

260

240

1300

1220

1150

1020

950

850

800

3960

2750

2200

1900

1680

1520

1400

2050

1950

1850

1650

1500

1370

1280

6300

4360

3520

3000

2650

2400

2250

4

"

7500

7200

6700

6000

5500

5000

4600

23000

15800

12800

10900

9700

8800

8100

3

"

3700

3450

3250

2950

2650

2450

2280

11000

7700

6250

5300

4750

4300

3900

16

fIGure 15. Gas pIpInG wIth flexIBle connector.

fIGure 16. Gas pIpInG wIth all

BlacK Iron pIpe to Gas control.

sedIMent traps

A sediment trap shall be installed as close to the inlet of the water heater as practical at the time of water heater installation. The sediment trap shall be either a tee fitting with a capped nipple in the bottom outlet or other device recognized as an effective sediment trap. If a tee fitting is used, it shall be installed in conformance with one of the methods of installation shown in the Figures 15 and 16.

Contaminants in the gas lines may cause improper operation of the gas control valve that may result in fire or explosion. Before attaching the gas line be sure that all gas pipe is clean on the inside. To trap any dirt or foreign material in the gas supply line, a sediment trap must be incorporated in the piping. The sediment trap must be readily accessible. Install in accordance with the

“Gas Piping” section. Refer to the current edition of the National

Fuel Gas Code, ANSI Z223.1/NFPA 54 or the Natural Gas and

Propane Installation Code CAN/CSA B149.1.

17

18

for Your safetY read Before lIGhtInG warnInG:

If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

Before lIGhtInG: entIre sYsteM Must Be fIlled wIth water and aIr purGed at faucets .

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 supplier’s

instructions.

• If you cannot reach your gas supplier, call the

fire department.

C. Use only your hand to push down or turn the gas control knob. Never use tools. If the knob will not push down 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 contact a qualified installer or service agency to replace a flooded water heater. Do not attempt to repair the unit! It must be replaced!

lIGhtInG InstructIons

Gas control top vIew

1. STOP! Read the safety information above on

this label.

2. Set the thermostat to the lowest setting by turning thermostat dial fully clockwise until it stops.

3. Push the gas control knob down slightly and turn clockwise to “OFF” (Figure A).

NOTE: Gas control knob CANNOT be turned from “PILOT”

to “OFF” unless it is pushed down slightly. Do not force.

4. Remove the inner and outer doors located below and behind the gas control unit.

5. 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 do not smell gas, go to the next step.

6. Find Pilot. Follow metal tube from the bottom , right of the gas control to the pilot burner. (Figure D).

7. Turn gas control knob counterclockwise to “PILOT”

(Figure B).

8. Push gas control knob down all the way and hold it down.

Immediately light the pilot with a match. Continue to

fIGure “d”

hold the gas control knob down for about one (1) minute after the pilot is lit. Release the gas control knob and it will pop back up. Pilot should remain lit. If it goes out, repeat

Steps 3 through 8. It may take several minutes 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 to “OFF” (Figure A) and call your

service technician or gas supplier.

9. Replace inner and outer burner doors.

10. At arm’s length away, turn the gas control knob counterclockwise to “ON” (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.

to turn off Gas to applIance

1. Set the thermostat to lowest setting.

2. Push gas control knob down slightly and turn clockwise to “OFF”. Do not force, see Figure A.

19

teMperature reGulatIon

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 (16.7°C). If you experience this type of use you should consider using lower temperature settings to reduce scald hazards.

Any water heater’s intended purpose is to heat water. Hot water is needed for cleansing, cleaning, and sanitizing (bodies, dishes, clothing). Untempered hot water can present a scald hazard.

Depending on the time element, and the people involved (adults, children, elderly, infirm, etc.) scalding may occur at different temperatures.

Never allow small children to use a hot water tap, or to draw their own bath water. Never leave a child or handicapped person unattended in a bathtub or shower.

NOTE: A water temperature range of 120°F-140°F (49°C-60°C) is recommended by most dishwasher manufacturers.

The thermostat of this water heater has been factory set at its lowest position ( PIlOT lIGHTING ). It is adjustable and must be reset to the desired temperature setting to reduce the risk of scald injury.

The mark ( ) indicative of approximately 120°F (49°C) is preferred starting point. Some States have a requirement for a lower setting.

Turn the water temperature dial clockwise ( ) to decrease the temperature, or counterclockwise ( ) to increase the temperature.

Should overheating occur or the gas supply fail to shut off, turn off the manual gas control valve to the water heater.

HOTTER WATER CAN SCALD: Water heaters are intended to produce hot water. Water heated to a temperature which will satisfy space heating, clothes washing, dish washing, and other sanitizing needs can scald and permanently injure you upon contact. Some people are more likely to be permanently injured by hot water than others.

These include the elderly, children, the infirm, or physically/mentally handicapped. If anyone using hot water in your home fits into one of these groups or if there is a local code or state law requiring a certain temperature water at the hot water tap, then you must take special precautions. In addition to using the lowest possible temperature setting that satisfies your hot water needs, a means such as a mixing valve should be used at the hot water taps used by these people or at the water heater. Mixing valves are available at plumbing supply or hardware stores, see Figure 2. Follow manufacturer’s instructions for installation of the valves. Before changing the factory setting on the thermostat, read the “Temperature Regulation” section in this manual, see Figures 17 and 18.

fIGure 17.

Water

Temperature °F

Time for

1st Degree Burn

(Less Severe Burns)

Time for Permanent Burns

2nd & 3rd Degree

(Most Severe Burns)

110

116

116

122

131

(normal shower temp.)

(pain threshold)

35 minutes

1 minute

5 seconds

45 minutes

5 minutes

25 seconds

140

149

154

2 seconds

1 second instantaneous

5 seconds

2 seconds

1 second

(U.S. Government Memorandum, C.P.S.C., Peter L. Armstrong, Sept. 15,1978)

fIGure 18.

for Your InforMatIon

start up condItIons draft hood operatIon

Check draft hood operation by performing a worst case depressurization of the building. With all doors and windows closed, and with all air handling equipment and exhaust fans operating such as furnaces, 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.

appear to be leaking when in fact the water is condensation. This usually happens when: a. A new water heater is filled with cold water for the first time.

b. Burning gas produces water vapor in water heaters, particularly high efficiency models where flue temperatures are lower.

c. Large amounts of hot water are used in a short time and the refill water in the tank is very cold.

Moisture from the products of combustion condense on the cooler tank surfaces and form drops of water which may fall onto the burner or other hot surfaces to produce a “sizzling” or “frying” noise.

condensatIon

Whenever the water heater is filled with cold water, some condensate will form while the burner is on. A water heater may

20

Excessive condensation can cause pilot outage due to water running down the flue tube onto the main burner and putting out the pilot.

checKInG Gas Input

With this heater in operation, determine whether it is receiving the full rated input of gas. This may be done by timing the gas meter and measuring gas pressure with a gauge or manometer. When the heater is operating at full capacity (full gas input) it should consume approximately 1 cubic foot of gas in the time shown in Table 5.

Model

BT-80

BT-100

taBle 5. Input checK tIMe requIred to consuMe 1 cu. ft. of Gas

type of Gas

Natural

Propane

Natural

Propane

Btu per cu. ft.

1050

2500

1050

2500

approx. time required to consume 1 cu. ft. of Gas

50.3 sec. 119. 8 sec.

50.3 sec. 119.8 sec.

Use this formula to “clock” the meter. Be sure that other gas consuming appliances are not operating during this interval.

3,600 X H = Btu/Hr

T

T = Time in seconds needed to burn one cubic foot of gas.

H = Heating value of gas in Btu’s per cubic foot of gas.

Btu/Hr = Actual heater input rate.

Example: (Using BT-80 heater)

T = 50.3 seconds/ft

3

H = 1,050 Btu/ft

3

(natural gas)

Btu/Hr = ?

3,600 X 1,050 = 75,100 Btu/Hr (22.0 kW)

50.3

Compare the actual input rate to that given on the heater’s rating plate. In the example, the BT-80’s full input rate should be 75,100

Btu/Hr for natural gas.

Because of the suddenness and amount of water, condensation water may be diagnosed as a “tank leak”. After the water in the tank warms up (about 1-2 hours), the condition should disappear.

Do not assume the water heater is leaking until there has been enough time for the water in the tank to warm up.

An undersized water heater will cause more condensation. The water heater must be sized properly to meet the family’s demands for hot water including dishwashers, washing machines and shower heads.

Excessive condensation may be noticed during the winter and early spring months when incoming water temperatures are at their lowest.

Good venting is essential for a gas fired water heater to operate properly as well as to carry away products of combustion and water vapor.

sMoKe/odor

It is not uncommon to experience a small amount of smoke and odor during the initial start-up. This is due to burning off of oil from metal parts, and will disappear in a short while.

stranGe sounds

Possible noises due to expansion and contraction of some metal parts during periods of heat-up and cool-down do not necessarily represent harmful or dangerous conditions.

Condensation causes sizzling and popping within the burner area during heating and cooling periods and should be considered normal.

See “Condensation” in this section.

operatIonal condItIons sMellY water

In each water heater there is installed at least one anode rod (see parts section) for corrosion protection of the tank. Certain water conditions will cause a reaction between this rod and the water.

The most common complaint associated with the anode rod is one of a “rotten egg smell” in the hot water. This odor is derived from hydrogen sulfide gas dissolved in the water. The smell is the result of four factors which must all be present for the odor to develop: a. A concentration of sulfate in the supply water.

b. Little or no dissolved oxygen in the water.

c. A sulfate reducing bacteria which has accumulated within the water heater (this harmless bacteria is nontoxic to humans).

d. An excess of active hydrogen in the tank. This is caused by the corrosion protective action of the anode.

Smelly water may be eliminated or reduced in some water heater models by replacing the anode(s) with one of less active material, and then chlorinating the water heater tank and all hot water lines. Contact the local water heater supplier or service agency for further information concerning an Anode Replacement Kit and this chlorination treatment.

If the smelly water persists after the anode replacement and chlorination treatment, we can only suggest that chlorination or aeration of the water supply be considered to eliminate the water problem.

do not remove the anode leaving the tank unprotected. By doing so, all warranty on the water heater tank is voided.

21

“aIr” In hot water faucets

(generally two weeks or more). Hydrogen gas is extremely flammable and explosive. To prevent the possibility of injury under these conditions, we recommend the hot water faucet, located farthest away, be opened for several minutes before any electrical appliances which are connected to the hot water system are used (such as a dishwasher or washing machine). If hydrogen gas is present, there will probably be an unusual sound similar to air escaping through the pipe as the hot water faucet is opened. There must be no smoking or open flame near the faucet at the time it is open.

hIGh water teMperature shut off sYsteM

This water heater is equipped with an automatic gas Shut-off system. This system works when high water temperatures are present. The high temperature Shut-off is built into the gas control valve. It is non-resettable. If the high temperature Shut-off activates, the gas control valve must be replaced. Contact your gas supplier or service agency. Turn “OFF” the entire gas supply to the water heater.

HYDROGEN GAS: Hydrogen gas can be produced in a hot water system that has not been used for a long period of time

ventInG sYsteM InspectIon

perIodIc MaIntenance

Burner InspectIon

Flood damage to a water heater may not be readily visible or immediately detectable. However, over a period of time a flooded water heater will create dangerous conditions which can cause

DEATH, SERIOUS BODIlY INjURY, OR PROPERTY DAMAGE.

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

At least once a year a visual inspection should be made of the main burner and pilot burner, see Figure 19.

You should check for sooting. Soot is not normal and will impair proper combustion.

Soot build-up indicates a problem that requires correction before further use. Turn “OFF” gas to water heater and leave off until repairs are made, because failure to correct the cause of the sooting can result in a fire causing death, serious injury, or property damage.

natural

At least once a year a visual inspection should be made of the venting system. You should look for:

1. Obstructions which could cause improper venting. The

combustion and ventilation air flow must not be obstructed.

2. Damage or deterioration which could cause improper venting

or leakage of combustion products.

3. Rusted flakes around top of water heater.

Be sure the vent piping is properly connected to prevent escape of dangerous flue gases which could cause deadly asphyxiation.

Obstructions and deteriorated vent systems may present serious health risk or asphyxiation.

Chemical vapor corrosion of the flue and vent system may occur if air for combustion contains certain chemical vapors. Spray can propellants, cleaning solvents, refrigerator and air conditioner refrigerants, swimming pool chemicals, calcium and sodium chloride, waxes, bleach and process chemicals are typical compounds which are potentially corrosive.

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

22

propane

fIGure 19.

Burner cleanInG

If inspection of the burner shows that cleaning is required, turn the gas control knob clockwise ( ) to the “OFF” position, depressing slightly.

note: the knob cannot be turned from “pIlot” to “off” unless knob is depressed slightly. do not force.

Loose deposits on or around the burner can be removed by carefully using the hose of a vacuum cleaner inserted through the access door of the water heater. If the burner needs to be removed for additional cleaning, call a service agency to remove and clean the burner and correct the problem that required the burner to be cleaned.

houseKeepInG

Fire and Explosion Hazard

Do not obstruct combustion air openings at the bottom of the water heater.

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

Can cause serious injury or death.

It is recommended that the Temperature-Pressure Relief Valve should be checked to ensure that it is in operating condition every 6 months.

When checking the Temperature-Pressure Relief Valve operation, make sure that (1) no one is in front of or around the outlet of the

Temperature-Pressure Relief Valve discharge line, and (2) that the water discharge will not cause any property damage, as the water may be extremely hot. Use care when operating valve as the valve may be hot.

To check the relief valve, lift the lever at the end of the valve several times, see Figure 20. The valve should seat properly and operate freely.

If after manually operating the valve, it fails to completely reset and continues to release water, immediately close the cold water inlet to the water heater and drain the water heater, see

Draining And Flushing on page 25. Replace the Temperature-

Pressure Relief Valve with a properly rated/sized new one, see

Temperature-Pressure Relief Valve on page 11 for instructions on replacement.

TEMPERATURE-PRESSURE

RELIEF VALVE

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

INSTALLED IN SUITABLE AREA: To insure sufficient ventilation and combustion air supply, proper clearances from the water heater must be maintained. See “Locating the New Water Heater” section.

Combustible materials such as clothing, cleaning materials, or flammable liquids, etc. must not be placed against or adjacent to the water heater which can cause a fire.

anode rod InspectIon

CAUTION

Property Damage Hazard

Av oid water heater damage.

Inspection and replacement of anode rod required.

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 water’s taste or color. The rod must be maintained to keep the tank in operating condition.

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

Artificially softened water is exceedingly corrosive because the process substitutes sodium ions for magnesium and calcium ions.

The use of a water softener may decrease the life of the water heater tank.

The anode rod should be inspected after a maximum of three years and annually thereafter until the condition of the anode rod dictates its replacement.

note:

Artificially softened water requires the anode rod to be inspected annually.

teMperature-pressure relIef valve test

Burn hazard.

Hot water discharge.

Keep clear of Temperature-

Pressure Relief Valve discharge outlet.

DISCHARGE PIPE

fIGure 20.

If the Temperature-Pressure Relief Valve on the water heater weeps or discharges periodically, this may be due to thermal expansion.

note:

Excessive water pressure is the most common cause of

Temperature-Pressure Relief Valve leakage. Excessive water system pressure is most often caused by “thermal expansion” in a “closed system.” See Closed Water Systems and Thermal

Expansion on page 10. The Temperature-Pressure Relief Valve is not intended for the constant relief of thermal expansion.

Temperature-Pressure Relief Valve leakage due to pressure build up in a closed system that does not have a thermal expansion tank installed is not covered under the limited warranty. Thermal expansion tanks must be installed on all closed water systems.

do not pluG the teMperature-pressure relIef valve openInG. thIs can cause propertY daMaGe, serIous InjurY or death.

Explosion Hazard

Temperature-Pressure Relief Valve must comply with ANSI Z21.22-

CSA 4.4 and ASME code.

Properly sized temperaturepressure relief valve must be installed in opening provided.

Can result in overheating and excessive tank pressure.

Can cause serious injury or death.

23

recoMMended procedure for perIodIc reMoval of lIMe deposIts froM tanK tYpe coMMercIal water heaters

The amount of calcium carbonate (lime) released from water is in direct proportion to water temperature and usage, see chart. The higher the water temperature or water usage, the more lime deposits are dropped out of the water. This is the lime scale which forms in pipes, heaters and on cooking utensils.

Lime accumulation not only reduces the life of the equipment but also reduces efficiency of the heater and increases fuel consumption.

The usage of water softening equipment greatly reduces the hardness of the water. However, this equipment does not always remove all of the hardness (lime). For this reason it is recommended that a regular schedule for deliming be maintained.

The time between cleaning will vary from weeks to months depending upon water conditions and usage.

The depth of lime buildup should be measured periodically. Heaters equipped with cleanouts will have about 2” of lime buildup when the level of lime has reached the bottom of the cleanout opening. A schedule for deliming should then be set up,based on the amount of time it would take for a 1” buildup of lime. It is recommended that the water heater initially be inspected after 6 months.

Example 1:

Initial inspection after 6 months shows 1/2” of lime accumulation.

Therefore, the heater should be delimed once a year.

Example 2:

Initial inspection after 6 months shows 2” of lime accumulation.

Therefore, the heater should be delimed every 3 months.

1. Drain heater.

2. Remove outer cover plate from lower side of heater jacket.

3. Remove six (6) hex head screws securing tank cleanout plate and remove plate.

4. Remove lime, scale, or sediment using care not to damage the glass lining.

5. Inspect cleanout plate gasket, if new gasket is required, see replacement parts list for item number.

6. Install cleanout plate. Be sure to draw plate up tight by tightening screws securely.

7. Replace outer jacket cover plate.

fIGure 22.

delIMInG solvents fIGure 21.

UN•LIME is recommended for deliming. UN•LIME is a patented food grade acid which is safe to handle and does not create the harmful fumes which are associated with other products.

UN•LIME may be obtained from your dealer, distributor or water heater manufacturer. Order Part Number 9005416105, 1 gallon, packed 4 gallons per case or Part Number 9005417105, 5 gallon container.

note:

Un•Lime is not available for use in Canada.

Hydrochloric base acids are not recommended for use on glass lined tanks.

Observe handling instructions on label of product being used.

tanK cleanout procedure

The following practices will ensure longer life and enable the unit to operate at its designed efficiency:

1. Once a month the heater should be flushed. Open the drain valve and allow two gallons of water to drain from the heater. Inlet water valve should remain open to maintain pressure in tank.

2. A cleanout opening is provided for periodic cleaning of the tank.

Gas must be shut off and heater drained before opening cleanout.

To clean heater through cleanout opening, proceed as follows:

24

9. In some water areas the sediment might not be removed by this method and may result in the water heater making rumbling or boiling noises. To dissolve and remove these more stubborn mineral deposits, A. O. Smith UN•LIME Professional Delimer should be used.

delIMInG usInG flo-juG Method

UN•LIME in the 5 gallon size is recommended for deliming of the

BT-80 and 100 models. UN•LIME with the necessary hoses and fittings to delime your heater is also available as a kit: Up-N-Down

Transfer Kit. Contact your local A.O. Smith dealer, distributor or, A.O.

Smith Corporation, Telephone: (800) 433-2545, Fax: (800) 433-2515 or Website: www.hotwater.com.

prepare the water heater

To delime the water heater using the Flo-Jug method, first prepare the heater for deliming as described in the “Why? When? and How?” booklet, Form No. 4800. Then install the long plastic male adapter fitting into the drain valve opening of the water heater. Use teflon tape and hand tighten only. Do not overtighten.

prepare the up-n-down transfer KIt

The next step is the preparation on the Up-N-Down Transfer Kit, if you have not already done so:

1. With the 5 gallon Up-N-Down container in the vertical position, unscrew the plastic vent cap in the handle and pierce the plastic membrane over the vent boss under the cap to allow the container to vent.

note:

If your container does not have the vent cap and vent boss, drill a 3/16” (4.76mm) hole in the handle. When you have finished deliming you will be able to plug this drilled vent with the stainless steel screw that is supplied with the kit.

2. Remove the container’s cap and cut plastic membrane located in the 3/4” IPT opening in cap. Take care to not damage the threads.

3. Find the 3/4” male adapter, apply teflon tape to the threaded end and screw it into the 3/4” IPT opening in the cap.

4. Put cap with male adapter back on the container and slide 3/4” hose over end of male adapter and fasten in place using hose clamp provided.

delIMe usInG flo-juG Method

5. Slide the hose clamp over end of hose and slide hose over the male adapter in the water heater drain opening and secure in place using hose clamp.

6. Lift container to the “Pour” Position being careful to keep the vent in the handle above the liquid level and pour the UN•LIME into the heater.

7. Lower container, you may have to place the container on its empty carton to prevent the UN•LIME from flowing back into the container.

8. Let UN•LIME remain in the heater for 5 minutes and then lower the container to the “Drain” Position.

9. Deliming activity is indicated by foaming on the surface of the

UN•LIME. If there is deliming activity, repeat steps 6 thru 8.

Normally, lime removal will be completed within one hour. Severe build-up of lime may take longer than an hour to complete descaling.

Note: To check UN•LIME for continued use, place some scale or white chalk in a glass with a small amount of UN•LIME. If the material is vigorously dissolved by the UN•LIME, it can be reused; if not, the

UN•LIME should be replaced.

If the temperature-pressure relief valve on the appliance weeps or discharges periodically, this may be due to thermal expansion.

You may have a check valve installed in the water line or a water meter with a check valve. Consult your local water supplier or service agency for further information. Do not plug the temperaturepressure relief valve.

draInInG and flushInG

It is recommended that the water heater storage tank be drained and flushed every 6 months to reduce sediment buildup. The water heater should be drained if being shut down during freezing temperatures. See Features And Components in this manual for the location of the water heater components described below.

Burn harzard.

Hot water discharge.

Keep hands clear of drain valve discharge.

to draIn the water heater storaGe tanK:

1. Turn off the electrical supply to the water heater.

2. Turn off the gas supply at the Main Gas Shutoff Valve if the water heater is going to be shut down for an extended period.

3. Ensure the cold water inlet valve is open.

4. Open a nearby hot water faucet and let the water run until the water is no longer hot.

5. Close the cold water inlet valve to the water heater.

25

6. Connect a hose to the water heater drain valve and terminate it to an adequate drain.

7. Open the water heater drain valve and allow all the water to drain from the storage tank.

8. close the water heater drain valve when all water in the storage tank has drained.

9. Close the hot water faucet opened in Step 4.

10. If the water heater is going to be shut down for an extended period, the drain valve should be left open.

to flush the water heater storaGe tanK:

1. Turn off the electrical supply to the water heater.

2. Ensure the cold water inlet valve is open.

3. Open a nearby hot water faucet and let the water run until the water is no longer hot. Then close the hot water faucet.

4. Connect a hose to the drain valve and terminate it to an adequate drain.

5. Ensure the drain hose is secured before and during the entire flushing procedure. Flushing is performed with system water pressure applied to the water heater.

6. Open the water heater drain valve to flush the storage tank.

7. Flush the water heater storage tank to remove sediment and allow the water to flow until it runs clean.

8. Close the water heater drain valve when flushing is completed.

9. Remove the drain hose.

10. Fill the water heater - see Filling The Water Heater in this manual.

11. Turn on the electrical supply to place the water heater back in operation.

12. Turn on the gas supply to the water heater at the Main Gas

Shutoff Valve.

13. Allow the water heater to complete several heating cycles to ensure it is operating properly.

servIce

Before calling for repair service, read the “Start Up Conditions” and

“Operational Conditions” found in the “For Your Information” section of this manual.

If a condition persists or you are uncertain about the operation of the water heater contact a service agency. If you are not thoroughly familiar with gas codes, your water heater, and safety practices, contact your gas supplier or qualified installer to check the water heater.

Use the ”Leakage Checkpoints” guide to check a “Leaking” water heater. Many suspected “Leakers” are not leaking tanks. Often the source of the water can be found and corrected.

Read this manual first. Then before checking the water heater make sure the gas supply has been turned “OFF”, and never turn the gas

“ON” before the tank is completely full of water.

Never use this water heater unless it is completely filled with water.

To prevent damage to the tank, the tank must be filled with water.

Water must flow from the hot water faucet before turning “ON” gas to the water heater.

Read this manual first. Then before checking the water heater make sure the gas supply has been turned “OFF”, and never turn the gas

“ON” before the tank is completely full of water.

Never use this water heater unless it is completely filled with water.

To prevent damage to the tank, the tank must be filled with water.

Water must flow from the hot water faucet before turning “ON” gas to the water heater.

leaKaGe checKpoInts

A. Water at the draft hood is water vapor which has condensed out of the combustion products. This is caused by a problem in the vent. Contact the gas utility.

B. *Condensation may be seen on pipes in humid weather or pipe connections may be leaking.

C. *The anode rod fitting may be leaking.

D. Small amounts of water from temperature-pressure relief valve may be due to thermal expansion or high water pressure in your area.

E. *The temperature-pressure relief valve may be leaking at the tank fitting.

F. Water from a drain valve may be due to the valve being slightly opened.

G. *The drain valve may be leaking at the tank fitting.

H. Combustion products contain water vapor which can condense on the cooler surfaces of the tank. Droplets form and drip onto the burner or run on the floor. This is common at the time of start-up after installation and when incoming water is cold.

I. Water in the water heater bottom or on the floor may be from condensation, loose connections, or the relief valve. DO NOT replace the water heater until a full inspection of all possible water sources is made and necessary corrective steps taken.

Leakage from other appliances, water lines, or ground seepage should also be checked.

* To check where threaded portion enters tank, insert cotton swab between jacket opening and fitting. If cotton is wet, follow

“Draining” instructions in the “Periodic Maintenance” section and then remove fitting. Put pipe dope or teflon tape on the threads and replace. Then follow “Filling the Water Heater” instructions in the “Installing the New Water Heater” section.

26

Problem

WATER lEAkS lEAkING T&P VAlVE

trouBleshootInG GuIdelInes

These guidelines should be utilized by a qualified service agent.

cause

Improperly sealed, hot or cold supply connection, relief valve, drain valve, or thermostat threads.

Leakage from other appliances or water lines.

Condensation of flue products.

Thermal expansion in closed water system.

Solution

Tighten threaded connections.

Improperly seated valve.

SMEllY WATER

PIlOT WIll NOT lIGHT

BURNER WIll NOT

STAY lIT

High sulfate or mineral content in water supply.

Bacteria in water supply.

Gas control knob not positioned correctly.

Main gas supply off.

Thermocouple malfunction.

Match not close to pilot

Thermocouple malfunction.

Defective Gas Control.

PIlOT OUTAGE

Dirty pilot burner.

Thermocouple malfunction.

Defective Gas Control.

Thermocouple tip is not in contact with pilot flame.

Heater not lit or thermostat not on.

Thermostat set too low.

Heater undersized.

Low gas pressure.

NOT ENOUGH

HOT WATER

Incoming water is unusually cold.

Leaking hot water pipes or fixtures.

WATER TOO HOT

High temperature limit switch activated.

Thermostat set too high.

WATER HEATER SOUNDS Condensation dripping on burner.

SIZZLING OR

RUMBlING

Sediment or calcium in bottom of heater tank.

SOOTING Improper combustion.

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 or aerate water supply.

Refer to LIGHTING INSTRUCTIONS.

Turn on main gas shutoff valve.

Replace pilot assembly and/or thermocouple.

Locate pilot, move match closer.

Replace pilot assembly and/or thermocouple.

Replace Gas Control.

Clean pilot assembly.

Replace pilot assembly and/or thermocouple.

Replace Gas Control.

Insert thermocouple correctly.

Refer to LIGHTING INSTRUCTIONS.

Refer to TEMPERATURE REGULATION.

Reduce hot water use.

Contact your gas supplier.

Allow more time for heater to re-heat.

Have plumber check and repair leaks.

Contact a service agency to determine cause.

Refer to TEMPERATURE REGULATION.

Refer to CONDENSATION.

Clean sediment from tank. Refer to DRAINING instructions in Maintenance section of manual.

No adjustment available. Contact a service agency to determine cause.

VENT GAS ODORS

Lack of supply air.

Improperly installed vent piping.

Downdraft.

Poor combustion.

Contact a service agency to determine cause.

27

water pIpInG dIaGraMs

COLD WATER SUPPLY

EXPANSION TANK

28

PIPE T&P TO OPEN DRAIN

FINISHED FLOOR

RETURN FROM FIXTURES

COLD WATER SUPPLY

EXPANSION TANK

ALT. COLD WATER CONNECTION

29

PIPE T&P TO OPEN DRAIN

FINISHED FLOOR

RETURN FROM FIXTURES

COLD WATER SUPPLY

EXPANSION TANK

ALTERNATE LOCATION

30

PIPE T&P TO OPEN DRAIN

FINISHED FLOOR

31

COLD WATER SUPPLY

EXPANSION TANK

32

PIPE T&P TO OPEN DRAIN

PIPE T&P TO OPEN DRAIN

FINISHED FLOOR

PIPE T&P TO OPEN DRAIN

BOOSTER HEATER

COLD WATER SUPPLY

EXPANSION TANK

PIPE T&P TO OPEN DRAIN

33

FINISHED FLOOR

notes

34

Model Bt limited warranty

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

1. THE TANk

If the glass-lined tank in this water heater shall prove upon examination by the warrantor to have leaked due to natural corrosion from potable water therein, during the first THREE years after initial installation, the warrantor will supply a complete new A. O. Smith water heater of equivalent size and current model. Some government agencies are requiring energy efficient standards for water heaters. In the event regulations prohibit sale of a model of equivalent size and construction, A. O. Smith will provide a model which complies with the regulations of your area, in which case the consumer will be charged the difference in price between the like replacement and the energy efficient model required. The warranty on the replacement water heater will be limited to the unexpired term of the original warranty.

2. All OTHER PARTS

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

3. cONDITIONS AND EXcEPTIONS

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

a. This warranty shall apply only when the heater is:

(1) used at temperatures not exceeding the maximum calibrated setting of its thermostat;

(2) used at water pressure not exceeding the working pressure shown on the heater;

(3) filled with potable water, free to circulate at all times and with the tank free of damaging water sediment or scale deposits;

(4) used in a non-corrosive and non-contaminated atmosphere;

(5) used with factory approved anode(s) installed;

(6) in its original installation location;

(7) in the United States, its territories or possessions;

(8) sized in accordance with proper sizing techniques for commercial and/or residential water heaters;

(9) bearing a rating plate which has not been altered, defaced or removed, except as required by the warrantor;

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

(11) operated with properly installed sediment trap;

(12) fired with the fuel for which it was factory built;

(13) fired at the factory rated input;

(14) operated with the inner and outer combustion chamber doors in place.

b. Any accident to the water heater, any misuse, abuse (including freezing or thermal expansion damage) or alteration of, any operation in a modified form, or any attempt to repair tank leaks will void this warranty.

c. This warranty is void if a device acting as a backflow prevention device (check valves etc.) is installed in the cold water supply the heater is connected to, unless an effective method of controlling thermal expansion is also installed at the heater(s) and operational at all times. The relief valve installed on the heater is not an acceptable method.

4. SERVIcE AND REPAIR EXPENSES

Under the limited warranty the warrantor will provide only a replacement water heater or part thereof. The owner is responsible for all other costs.

Such costs may include but are not limited to: a. Labor charges for service removal, repair or reinstallation of the water heater or any component part; b. Shipping, delivery, handling, and administrative charges for forwarding the new heater or replacement part from the nearest distributor and returning the claimed defective heater or part to such distributor.

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

5. lIMITATIONS ON IMPlIED WARRANTIES

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

6. clAIM PROcEDURE

Any claim under the warranty should be initiated with the dealer who sold the heater, or with any other dealer handling the warrantor’s products. If this is not practicable, the owner should contact:

U.S. Customers

A. O. Smith Corporation

500 Tennessee Waltz Parkway

Ashland City, TN 37015

Telephone: (800) 527-1953

Canadian Customers

A. O. Smith Enterprises Ltd.

768 Erie Street

Stratford (Ontario) N5A 6T3

Telephone:(800) 265-8520 a. The warrantor will only honor replacement with identical or similar water heater or parts thereof which are manufactured or distributed by the warrantor.

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

7. DISclAIMERS

NO OTHER EXPRESS WARRANTY HAS BEEN OR WIll BE MADE IN BEHAlf Of THE WARRANTOR WITH RESPEcT TO THE MERcHANT-

ABIlITY Of THE HEATER OR THE INSTAllATION, OPERATION, REPAIR OR REPlAcEMENT Of THE HEATER. THE WARRANTOR SHAll NOT

BE RESPONSIBlE fOR WATER DAMAGE, lOSS Of USE Of THE UNIT, INcONVENIENcE, lOSS OR DAMAGE TO PERSONAl PROPERTY

OR OTHER cONSEqUENTIAl DAMAGE. THE WARRANTOR SHAll NOT BE lIABlE BY VIRTUE Of THIS WARRANTY OR OTHERWISE fOR

DAMAGE TO ANY PERSONS OR PROPERTY, WHETHER DIREcT OR INDIREcT, AND WHETHER ARISING IN cONTRAcT OR IN TORT.

a. Some states do not allow the exclusion or limitation of the incidental or consequential damage, so the above limitations or exclusions may not apply to you.

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

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

Model No. ________________________Serial No. __________________________________________________ Date Installed _____________

Dealer’sName ________________________________________________________________________________________________________

Dealer’s Address ___________________________________________________________________________Phone No. __________________ city and State _____________________________________________________________________________ Zip ________________________ kEEP THIS WARRANTY POSTED ADjAcENT TO THE HEATER fOR fUTURE REfERENcE.

35

500 Tennessee Waltz Pkwy., Ashland city, TN 37015

Technical Support: 800-527-1953 • Parts: 800-433-2545

www.hotwater.com

Copyright © 2012 A. O. Smith Water Heater Company, All rights reserved.

36

Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project