A.O. Smith Residential Power Vent Gas Water Heaters with Hot Surface Ignition User Manual

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Instruction Manual for Residential Power Vent Gas Water Heaters

with Hot Surface Ignition

NOT FOR USE IN MANUFACTURED (MOBILE) HOMES

GAMA certification applies to all residential gas water heaters with capacities of 20 to 100 gallons with input rating of 75,000 BTU/Hr. or less.

ALL TECHNICAL AND WARRANTY QUESTIONS: SHOULD BE DIRECTED TO THE LOCAL DEALER FROM WHOM THE WATER HEATER WAS PURCHASED. IF YOU ARE UNSUCCESSFUL, PLEASE WRITE TO THE COMPANY LISTED ON THE RATING PLATE ON THE WATER HEATER.

For Your Safety AN ODORANT IS ADDED TO THE GAS

USED BY THIS WATER HEATER

 

 

 

 

 

 

WARNING

 

 

 

 

 

WARNING: If the information in these

 

 

 

 

 

 

 

 

 

 

Improper installation, adjustment, alteration,

 

instructions are not followed exactly, a fire

 

 

service or maintenance can cause DEATH, SERI-

 

or explosion may result, causing property

 

 

OUS BODILY INJURY, OR PROPERTY DAM-

 

damage, personal injury or death.

 

 

AGE. Refer to this manual for assistance or con-

 

 

 

 

sult the local gas utility for further information.

 

–Donot store or use gasoline or other

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

flammable vapors and liquids in the vicinity

 

 

 

 

 

 

 

of this or any other appliance.

 

 

 

 

 

 

 

–WHATTO DO IF YOU SMELL GAS

 

 

 

WARNING

 

 

 

 

 

 

 

 

• Do not try to light any appliance.

 

Flammable vapors may be drawn by air cur-

 

• Do not touch any electrical switch; do not

 

rents from other areas of the structure to this

 

use any phone in your building.

 

appliance.

 

• Immediately call your gas supplier from a

 

 

 

 

 

 

 

 

 

 

 

 

 

 

neighbor’s phone. Follow the gas supplier’s

 

 

 

 

 

 

 

instructions.

 

 

 

 

 

 

 

• If you cannot reach your gas supplier, call

 

 

 

 

 

 

 

 

 

WARNING

 

 

 

the fire department.

 

 

 

 

 

 

 

 

READ THE GENERAL SAFETY SECTION BEGIN-

 

–Installationand service must be performed

 

NING ON INSIDE COVER AND THEN THIS

 

by a qualified installer, service agency or the

 

ENTIRE MANUAL BEFORE INSTALLING OR

 

gas supplier.

 

OPERATING THIS WATER HEATER.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Save this Manual for Future Reference.

184326-001

 

 

 

11-03

General Safety

WARNING

Improper installation, adjustment, alteration, service or maintenance can cause death, serious bodily injury, or property damage. Refer to this manual or consult your local gas utility for further assistance.

WARNING

At the time of manufacture this water heater was provided with a combination temperature-pressurerelief valve certified by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment or materials, as meeting the requirements for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems, and the current edition of ANSI Z21.22 • CSA 4.4 and the code requirements of ASME. If replaced, the valve must meet the requirements of local codes, but not less than a combination temperature and pressure relief valve certified as meeting the requirements for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22 • CSA 4.4 by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment or materials.

The valve must be marked with a maximum set pressure not to exceed the marked hydrostatic working pressure of the water heater (150 lbs. p.s.i.) and a discharge capacity not less than the water heater input rate as shown on the model rating plate. (Electric heaters - watts divided by 1000 x 3412 equal BTU/Hr. rate.)

Your local jurisdictional authority, while mandating the use of a temperature-pressurerelief valve complying with ANSI Z21.22 • CSA 4.4 and ASME, may require a valve model different from the one furnished with the water heater.

Compliance with such local requirements must be satisfied by the installer or end user of the water heater with a locally prescribed temperature-pressurerelief valve installed in the designated opening in the water heater in place of the factory furnished valve.

For safe operation of the water heater, the relief valve must not be removed from it’s designated opening or plugged.

The temperature-pressurerelief valve must be installed directly into the fitting of the water heater designated for the relief valve. Position the valve downward and provide tubing so that any discharge will exit only within 6 inches above, or at any distance below the structural floor. 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, 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 relief valve and the tank. Do not connect tubing directly to discharge drain unless a 6air gap is provided. To prevent bodily injury, hazard to life, or property damage, the relief valve must be allowed to discharge water in 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.

The Discharge Pipe:

—Mustnot be smaller in size than the outlet pipe size of the valve, or have any reducing couplings or other restrictions.

—Mustnot be plugged or blocked.

—Mustbe of material listed for hot water distribution.—Mustbe installed so as to allow complete drainage of both

the temperature-pressurerelief valve, and the discharge pipe.—Mustterminate at an adequate drain.

—Mustnot have any valve between the relief valve and tank.

WARNING

WATER HEATERS EQUIPPED FOR ONE TYPE GAS ONLY: This water heater is equipped for one type gas only. Check the model rating plate near the gas control valve for the correct gas. DO NOT USE THIS WATER HEATER WITH ANY GAS OTHER THAN THE ONE SHOWN ON THE MODEL RATING PLATE. Failure to use the correct gas can cause problems which can result in DEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE. If you have any questions or doubts consult your gas supplier or local utility.

WARNING

A fire can start if combustible materials such as clothing, cleaning materials, or flammable liquids are placed against or next to the water heater.

WARNING

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.), all of which emit flammable vapors, may be improperly stored or used in such areas. The gas water heater ignitor or main burner can ignite such vapors. 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 the installation must be accomplished in a way that the ignitor and main burner flame are elevated from the floor at least 18 inches. While this may reduce the 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.

WARNING

HOTTER WATER CAN SCALD: Water heaters are intended to produce hot water. Water heated to a temperature which will satisfy 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, some type of tempering device, 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. Follow manufacturers instructions for installation of the valves. Before changing the factory setting on the thermostat, read the “Temperature Regulation” section in this manual.

WARNING

BEFORE OPERATING [PROPANE (L.P.) GAS WATER HEATERS]: Propane (L.P.) gas is heavier than air. Should there be a leak in the system, the gas will settle near the ground. Basements, crawl spaces, skirted areas under manufactured (mobile) homes (even when ventilated), closets and areas below ground level will serve as pockets for the accumulation of this gas. Before attempting to operate the water heater or turning on a nearby electrical light switch, be absolutely sure there is no accumulated gas in the area. Search for odor of gas by sniffing at ground level in the vicinity of the appliance. If odor is detected, follow steps indicated at “For Your Safety” on the cover page of this manual then leave the premises.

2

General Safety (cont’d)

WARNING

This water heater must not be installed directly on carpeting. Carpeting must be protected by a metal or wood panel beneath the appliance extending beyond the full width and depth of the appliance by at least 3 inches (76.2mm) in any direction, or if the appliance 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.

WARNING

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 company. Failure to provide the proper amount of combustion air can result in a fire or explosion and can cause DEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE.

WARNING

If this water heater will be used in beauty shops, barber shops, cleaning establishments, or self-servicelaundries 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. Refer to the “Locating The New Water Heater” section of this manual and also the current edition of the National Fuel Gas Code, ANSI Z223.1, also referred to as NFPA 54 for specifics provided concerning air required.

WARNING

The power vent water heater requires its own (separate) venting system. It cannot be connected to an existing vent pipe or chimney. It must be terminated to the outdoors. Failure to properly install the venting system can result in asphyxiation, a fire or explosion and can cause DEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE.

WARNING

No vent damper installation is compatible with this power vented water heater design. No vent damper, whether it is operated thermally or otherwise is to be installed on this power vented water heater. Alteration of any part of the factory-furnishedvent assembly could result in improper operation due to restriction of flue gases, spillage of flue gases and may cause carbon monoxide poisoning.

WARNING

1.The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of the gas system at test pressures in excess of 12 pound per square inch (3.5kPa).

2.The appliance must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal or less than 12 pound per square inch (3.5kPa).

WARNING

Soot build-upindicates 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 or explosion causing DEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE.

WARNING

The water heater with vent pipe installed must be properly vented 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.

WARNING

Vent termination must not be within 4 feet of any items such as gas meters, gas valves or other gas regulating equipment.

WARNING

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

WARNING

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.

WARNING

Minimum clearances between the water heater and combustible and non-combustibleconstruction are: 0 inches from sides, 0 inches from back, 5 inches from front of jacket to closet door and 14 inches from top of jacket to combustible andnon-combustiblematerial. Minimum vent clearance: 0 inches. Provide 24 inches front clearance for servicing and adequate clearance between the jacket top & ceiling for servicing the flue area.

WARNING

HYDROGEN GAS: Hydrogen gas can be produced in a hot water system that has not been used for a long period of time (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 be opened for several minutes at the kitchen sink 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.

WARNING

INSULATING JACKETS: When installing an external water heater insulation jacket on a gas water heater:

a.DO NOT cover the temperature-pressurerelief valve.

b.DO NOT put insulation over any part of the top of the gas water heater.

c.DO NOT put insulation over the gas control valve or gas control valve/burner cover, or any access areas to the burner.

d.DO NOT let insulation around the gas water heater to get within 8 inches of the floor (air must get to the burner).

e.DO NOT remove operating instructions, and safety related warning labels and materials affixed to the water heater. DO obtain new warning and instruction labels from the manufacturer for placement on the jacket directly over the existing labels.

Failure to heed this will result in the possibility of a fire or explosion.

WARNING

Flood damage to a water heater may not be readily visible or immediately detectible. However, over a period of time a flooded water heater will create dangerous conditions which can cause DEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE. Call a qualified service technician or contractor to replace a flooded water heater. Do not attempt to repair the unit! It must be replaced!

CAUTION

WATER HEATERS EVENTUALLY LEAK: Installation of the water heater must be accomplished in such a manner that if the tank or any connections should leak, the flow of water will not cause damage to the structure. For this reason, it is not advisable to install the water heater in an attic or upper floor. When such locations cannot be avoided, a suitable drain pan should be installed under the water heater. Drain pans are available at your local hardware store. Such a drain pan must be not greater than 112 inches deep, have a minimum length and width of at least 2 inches greater than the water heater dimensions and must be piped to an adequate drain. The pan must not restrict combustion air flow.

3

Table of Contents

 

General Safety................................................................................................................................

2,3

Table of Contents .........................................................................................................................

4

Introduction .........................................................................................................................................

5

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

5

Typical Installation.....................................................................................................................

6

Locating the New Water Heater ....................................................................

7-10

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

7

Combustion Air and Ventilation .........................................................................................................................

8,9

Venting Clearances...........................................................................................................................................

8,9

Combustion Air and Ventilation for Appliances Located in Unconfined Spaces.....................................................

9

Combustion Air and Ventilation for Appliances Located in Confined Spaces .......................................................

10

Installing the New Water Heater................................................................

11-24

Water Piping .......................................................................................................................................................

11

Temperature-PressureRelief Valve ......................................................................................................................

12

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

13

Wiring ............................................................................................................................................................

13,14

Field Installed Wiring ..................................................................................................................................

13,14

Wiring Diagram.................................................................................................................................................

14

Venting ..........................................................................................................................................................

15-22

Gas Piping......................................................................................................................................................

22,23

Installation Checklist ...........................................................................................................................................

24

Operating..........................................................................................................................................

25-27

Temperature Regulation..................................................................................................

28

For Your Information ......................................................................................................

29,30

Start Up Conditions .............................................................................................................................................

29

Condensation ....................................................................................................................................................

29

Smoke/Odor ......................................................................................................................................................

29

Thermal Expansion ............................................................................................................................................

29

Strange Sounds ..................................................................................................................................................

29

Operational Conditions ..................................................................................................................................

29,30

Smelly Water................................................................................................................................................

29,30

“Air” In Hot Water Faucet’s ...............................................................................................................................

30

High Temperature Limit Switch .........................................................................................................................

30

Venting Manual Reset Switch ............................................................................................................................

30

Not Enough or No Hot Water ............................................................................................................................

30

Water Is Too Hot ...............................................................................................................................................

30

Periodic Maintenance....................................................................................................

31-33

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

31

Burner Inspection ................................................................................................................................................

31

Burner Cleaning ..................................................................................................................................................

31

L.P. Gas Control Valve & Burner Assembly Replacement Information .................................................................

32

Housekeeping .....................................................................................................................................................

32

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

32

Temperature-PressureRelief Valve Operation......................................................................................................

32

Draining ..............................................................................................................................................................

33

Drain Valve Washer Replacement .......................................................................................................................

33

Service ................................................................................................................................................................

33

Leakage Checkpoints............................................................................................................

34

Troubleshooting.......................................................................................................................

35-37

Repair Parts ....................................................................................................................................

38,39

4

Introduction

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

Abbreviations Found In This Instruction Manual

CSA - Canadian Standards Association

ANSI - American National Standards Institute

NFPA - National Fire Protection Association

WARNING

This gas-firedwater heater is design certified by CSA INTERNATIONAL under American National Standard/CSA Standard for Gas Water Heaters ANSI Z21.10.1 • CSA 4.1 (current edition). The installation must conform with this manual, Local Codes and with the current edition of the National Fuel Gas Code, ANSI Z223.1 / NFPA 54.

This publication is available from your local government or public library, gas company, or by writing NFPA, Batterymarch Park, Quincy, MA 02269.

Preparing for the New Installation

1.Read the “General Safety” section, pages 2 and 3 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-firedwater heater. It also contains warnings through out 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 the instructions in this manual; gas company rules; and Local Codes, or in the absence of Local Codes, with the current edition of the National Fuel Gas code, ANSI Z223.1, also referred to as NFPA 54. This publication is available from your local government or public library or gas company or by writing NFPA, 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.

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 your local dealer, wholesaler, public utilities or 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-CMR2.00: State Plumbing Code and248-CMR5.00.

7.Complies with SCAQMD rule #1121 and districts having equivalent NOx requirements.

5

Typical Installation

VACUUM RELIEF REQUIRED BY SOME CODES VENT TO (REFER TO LOCAL CODES)

OUTDOORS

HOT WATER

OUTLET

COLD WATER INLET

Some models are equipped with circulating loop fittings.

 

 

 

*HOT (OUTLET) RECIRCULATING

 

 

 

 

LOOP CONNECTION CAN BE

 

 

 

 

INSTALLED WITHIN 360° RADIUS

 

TEMPERATURE-

 

 

 

 

 

 

 

 

PRESSURE RELIEF

 

 

 

 

 

 

 

 

 

VALVE

 

DIRECTION

 

 

 

 

OF FLOW

 

 

 

CHECK VALVE

 

 

 

MARKED WITH

 

 

 

DIRECTION OF

 

 

 

 

 

 

FLOW ARROW

 

 

 

 

 

 

 

 

 

DISCHARGE PIPE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Do not cap or plug)

 

 

 

 

 

 

 

 

 

 

RECIRCULAT-

 

 

 

 

 

 

 

PROVIDE A 6AIR GAP

 

 

 

 

 

 

 

 

 

MUST

 

 

 

GAS

BETWEEN THE END OF

 

 

TEMPERED

MIXING VALVE

 

IN THE

THE DISCHARGE PIPE

 

SUPPLY

 

WATER OUTLET

 

 

 

 

AND DRAIN

POSITION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DIRECTION

 

 

 

 

 

 

 

 

 

 

 

OF FLOW

 

 

 

 

 

 

 

 

 

 

 

HEAT TRAP

 

 

 

 

 

 

 

 

 

 

 

7' power cord (Factory supplied)

*Certain models do not have these connection assemblies shipped with the water heater. They (Part #9001262) are available through the manufacturer. See “Repair Parts” section for ordering information.

This appliance has been design certified as complying with American National Standard/CSA Standard for water heaters and is considered suitable for:

Water (Potable) Heating: All models are “considered suitable for water (potable) heating.”

Water (Potable) Heating and Space Heating: Certain models are “considered suitable for water (potable) heating and space heating.” Refer to the model and rating plate of the water heater.

WARNING

When the system requires water at temperatures higher than required for other uses, the hot water system may require a means such as a mixing valve to be installed to temper the water at certain points of use. Some people are more likely to be permanently injured by hot water than others; these include the elderly, children, the infirm, or the physically/mentally handicapped. Before immersing yourself or anyone else in hot water, be sure to check the water temperature. WARNING: HOTTER WATER INCREASES THE RISK OF SCALD INJURY. (Also see “Temperature Regulation” section) Mixing valves are available at plumbing supply or hardware stores. Follow manufacturers instructions for installation of these valves.

WARNING

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

If this water heater is also used for space heating applications, all piping and components connected to the water heater shall be suitable for use with potable water.

WARNING

Toxic chemicals such as used for treatment of boilers or non-potablewater heating appliances shall never be introduced into a potable water space heating system.

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

6

Locating the New Water Heater

Facts to Consider About the Location

You should 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 appliance. 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.The location selected should be indoors as close as practical to the vent termination point, and as centralized with the water piping system as possible. The water heater, as all water heaters, will eventually leak. Do not install without adequate drainage provisions where water flow will cause damage.

2.40,000 BTU/HR INPUT – If vented through an outside wall or through the roof, using 3″ vent piping the total vent run (vertical and horizontal) cannot exceed 115 feet

with one 90˚ elbow (50 feet with one 90° elbow if optional 2″ vent piping is used). If more elbows are required the venting distance must be reduced 5 feet for every 90˚ elbow. See page 18 for vent charts.

ALL OTHER INPUTS HIGHER THAN 40,000 BTU/HR –

If vented through an outside wall or through the roof, using 3″ vent piping the total vent run (vertical and hor-

izontal) cannot exceed 70 feet with one 90˚ elbow (110 feet with one 90° elbow if optional 4″ vent piping is used). If more elbows are required the venting distance must be reduced 5 feet for every 90˚ elbow. See page 18 for vent chart.

3.Vent piping cannot slope downward and horizontal runs require 18″ per five foot rise. All horizontal runs require adequate support at 312 foot intervals and vertical runs supported at 5 foot intervals.

4.The water heater requires its own (separate) venting system. Itcannot be connected to an existing vent pipe or chimney. It must terminate to the outdoors. Whenever possible terminate the vent on the leeward side of the building if vented through an outside wall.Note:

Condensation may be created, at times, as the combustion gases exit the vent cap and discoloration of surfaces in proximity to the vent cap may occur.

WARNING

The power vent water heater requires its own (separate) venting system. It cannot be connected to an existing vent pipe or chimney. It must be terminated to the outdoors. Failure to properly install the venting system can result in asphyxiation, a fire or explosion and can cause DEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE.

5.The water heater comes equipped with a 7 foot power cord which can be used to connect to a 110/120 volt power source if (1) local codes allow, and (2) there is a three prong receptacle available.

WARNING

Do not use an extension cord. If there is not a suitable receptacle and/or local codes prohibit use of a power cord, field wiring must be provided.

CAUTION

WATER HEATERS EVENTUALLY LEAK: Installation of the water heater must be accomplished in such a manner that if the tank or any connections should leak, the flow of water will not cause damage to the structure. For this reason, it is not advisable to install the water heater in an attic or upper floor. When such locations cannot be avoided, a suitable drain pan should be installed under the water heater. Drain pans are available at your local hardware store. Such a drain pan must be not greater than 112 inches deep, have a minimum length and width of at least 2 inches greater than the water heater dimensions and must be piped to an adequate drain. The pan must not restrict combustion air flow.

6.The location selection must provide adequate clearances for servicing and proper operation of the water heater.

WARNING

INSTALLATION 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.) or other substances (such as adhesives, etc.), all of which emit flammable vapors, may be improperly stored or used in such areas. The gas water heater ignitor or main burner can ignite such vapors. 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 the installation must be accomplished in a way that the ignitor and main burner flame are elevated from the floor at least 18 inches. While this may reduce the 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.

Also, the water heater must be located and/or protected so it is not subject to physical damage by a moving vehicle. NOTE: Flammable vapors may be drawn by air currents from other areas of the structure to the appliance.

7

Locating the New Water Heater (cont’d)

Facts to Consider About the Location (cont’d)

WARNING

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.

WARNING

This water heater must not be installed directly on carpeting. Carpeting must be protected by a metal or wood panel beneath the appliance extending beyond the full width and depth of the appliance by at least 3 inches (76.2mm) in any direction, or if the appliance 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.

WARNING

Minimum clearances between the water heater and combustible and non-combustibleconstruction are: 0 inches from sides, 0 inches from back, 5 inches from front of jacket to closet door and 14 inches from top of jacket to combustible andnon-combustiblematerial. Minimum vent clearance: 0 inches. Provide 24 inches front clearance for servicing and adequate clearance between the jacket top & ceiling for servicing the flue area. (See Figure 1).

12" MAX.

 

6" MIN.

0"

 

 

0"

 

 

100 Sq In

 

MIN.

WATER

 

MIN.

 

 

Minimum

 

WATER

 

 

 

 

 

 

HEATER

HEATER

 

 

 

 

VENTILATION

 

 

 

 

5"

 

 

AIR

 

 

 

 

 

 

 

0" MIN.

 

 

MIN.

 

 

OPENINGS

 

 

 

 

 

 

DOOR

 

 

 

 

 

 

TOP VIEW

0" MIN.

 

 

 

 

TOP VIEW OF

 

 

 

100 Sq In

 

OF CLOSET

TOP VIEW

 

 

 

Minimum

 

ALCOVE

 

 

 

 

WITHOUT DOOR

OF CLOSET

 

6" MIN.

DOOR

12" MAX.

 

 

 

WITH DOOR

 

 

 

FRONT VIEW

 

 

RECTANGULAR AIR

 

3" MIN.

Figure 1

 

OF DOOR

 

 

DUCT

 

 

 

 

 

 

 

 

 

 

 

 

 

AIR DUCT

 

 

 

 

 

 

 

 

 

WARNING

A gas water heater cannot operate properly without the correct amount of air for combustion. Do not install in a confined area such 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 company. Failure to provide the proper amount of combustion air can result in a fire or explosion and can cause DEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE.

WARNING

If this water heater will be used in beauty shops, barber shops, cleaning establishments, or self-servicelaundries 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. Refer to the “Locating The New Water Heater” section of this manual and also the current edition of the National Fuel Gas Code, ANSI Z223.1, also referred to as NFPA 54 for specifics provided concerning air required.

Combustion Air and Ventilation

When determining the installation location for a power vent water heater, snow accumulation and drifting should be considered in areas where applicable.

Venting Through an Outside Wall – Clearances

0″ clearance for 3″ (or optional 2″ and 4″) PVC, ABS, or CPVC Schedule 40 piping from combustible surfaces.

18″ minimum in all directions from any obstruction that may interfere.

12″ minimum from the ground, 9″ ceiling overhangs. Figure 2.

The Power Vent outlet terminal shall terminate at least 36″ above any forced air inlet into the building located within 10 feet. Figure 3a.

The Power Vent outlet terminal shall terminate at least 4 feet below, 4 feet horizontally from or 1 foot above any door, window or gravity air inlet into the building. Figure 3a.

18″ minimum from other natural draft (gravity) direct vent, power vent or power direct vent appliance inlet and/or outlet vent(s) when directly above or 135° to either side of center line. Figure 3c.

24″ minimum from any appliance inlet and/or outlet vents when directly below or 45° to either side of center line. Figure 3c.

The location selection must provide clearances for servicing and proper operation of the water heater. Figure 4.

Vent termination must not be within 4 feet of any items such as gas meters, gas valves or other gas regulating equipment.

The venting system must be installed in a manner which allows inspection of the installation of the venting pipes and joints as well as periodic inspection after installation as required by ANSI Standards.

WARNING

Vent termination must not be within 4 feet of any items such as gas meters, gas valves or other gas regulating equipment.

WARNING

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

8

Locating the New Water Heater (cont’d)

9″ min. from any overhang

C

Lof Flue

12″ min.

Figure 2

48″ min.

48″ min.

POWER VENT TERMINAL 12″ min.

Figure 3a

 

 

VENT

 

 

 

 

 

IF “B” DIMENSION

 

TERMINAL

 

 

 

 

 

POWER

B

 

IS LESS THAN 10’

 

 

 

 

.

 

 

 

min

36″ min.

 

12

 

 

 

 

 

 

FORCED AIR

 

 

INLET INTO

 

GRADE

 

BLDG.

 

 

 

 

VENT TERMINAL

18″ MIN.

18″ MIN.

Figure 3b

18″ TO WALL OR OTHER OBSTRUCTIONS THAT MAY INTERFERE WITH VENTING.

VENT TERMINAL

CORNER OF BUILDING

POWER VENT TERMINAL

18″

NATURAL DRAFT (GRAVITY),

DIRECT VENT, POWER VENT

OR POWER DIRECT VENT 24″ APPLIANCE INLET AND/OR

OUTLET VENT(S)

45°

Figure 3c

Must maintain adequate service and maintenance accessibility.

Range of degrees

Figure 4 available for vent pipe installation.

Venting Through Roof – Clearances

0″ clearance for 3″ (or optional 2″ and 4″) PVC, ABS, or CPVC Schedule 40 piping from combustible surfaces.

The Power Vent outlet terminal shall terminate at least 18 inches above the roof surface. Figure 5.

The location selection must provide clearances for servicing and proper operation of the water heater. Figure 4.

The venting system must be installed in a manner which allows inspection of the installation of the venting pipes and joints as well as periodic inspection after installation as required by ANSI Standards.

45° VENT CAP

 

90° STREET ELL

W/SCREEN

 

 

 

 

 

 

 

18″

Figure 5

Combustion Air and Ventilation for Appliances Located in Unconfined Spaces

Unconfined Space is a space whose volume is not less than 50 cubic feet per 1,000 Btu per hour of the aggregate input rating of all appliances installed in that 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.

In unconfined spaces in buildings, infiltration may be adequate to provide air for combustion, ventilation and dilution of flue gases. However, in buildings of tight construction (for example, weather stripping, heavily insulated, caulked, vapor barrier, etc.), additional air may need to be provided using the methods described in Combustion Air and Ventilation for Appliances Located in Confined Spaces.

9

Locating the New Water Heater (cont’d)

Combustion Air and Ventilation for Appliances Located in Confined Spaces

Confined Space is a space whose volume is less than 50 cubic feet per 1,000 Btu per hour of the aggregate input rating of all appliances installed in that space.

a.ALL AIR FROM INSIDE BUILDINGS: (See Page 8 Figure 1, and Figure 6 below)

The confined space shall be provided with two permanent openings communicating directly with an additional room(s) of sufficient volume so that the combined volume of all spaces meets the criteria for an unconfined space. The total input of all gas utilization equipment installed in the combined space shall be considered in making this determination. Each opening shall have a minimum free area of one square inch per 1,000 BTU per hour of the total input rating of all gas utilization equipment in the confined space, but not less than 100 square inches. One opening shall commence within 12 inches of the top and one commencing within 12 inches of the bottom of the enclosure.

VENT THROUGH

ROOF

VENT TO

OUTDOORS

OPENINGS

 

 

WATER

 

 

 

 

HEATER

 

 

 

 

 

Figure 6

b. ALL AIR FROM OUTDOORS: (see Figures 7-9)

The confined space shall be provided with two permanent openings, one commencing within 12 inches of the top and one commencing within 12 inches from the bottom of the enclosure. The openings shall communicate directly, or by ducts, with the outdoors or spaces (crawl or attic) that freely communicate with the outdoors.

VENTILATION LOUVERS

 

VENT THROUGH

(each end of attic)

 

 

 

 

ROOF

 

 

 

VENT TO

 

 

 

OUTDOORS

 

 

 

 

INLET AIR

WATER

 

 

HEATER

 

 

DUCT

 

 

 

 

Figure 7

VENTILATION LOUVERS

1.When directly communicating with the outdoors, each opening shall have a minimum free area of 1 square inch per 4,000 BTU per hour of total input rating of all equipment in the enclosure. (See Figure 6.)

2.When communicating with the outdoors through vertical ducts, each opening shall have a minimum free area of 1 square inch per 4,000 BTU per hour of total input rating of all equipment in the enclosure. (See Figure 8.)

VENTILATION LOUVERS

 

 

 

 

 

 

 

THROUGH ROOF

 

 

 

 

 

 

 

 

AIR OUTLET

 

 

 

VENT TO

 

 

 

 

 

 

 

OUTDOORS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WATER

 

 

 

 

 

 

 

 

INLET AIR DUCT

 

 

 

HEATER

 

 

 

 

 

 

(ends 1″ above floor)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 8

3.When communicating with the outdoors through horizontal ducts, each opening shall have a minimum free area of 1 square inch per 2,000 BTU per hour of total input rating of all equipment in the enclosure. (See Figure 9.)

VENT THROUGH

ROOF

VENT TO

OUTDOORS

OUTLET AIR DUCT

INLET AIR DUCT

Figure 9

4.When ducts are used, they shall be of the same cross-sec-tional area as the free area of the openings to which they connect. The minimum short side dimension of rectangular air ducts shall not be less than 3 inches. (See Figure 9.)

5.Louvers and Grilles: In calculating free area, consideration shall be given to the blocking effect of louvers, grilles or screens protecting openings. Screens used shall not be smaller than 14 inch mesh. If the free area through a design of louver or grille is known, it should be used in calculating the size opening required to provide the free area specified. If the design and free area is not known, it may be assumed that wood louvers will be20-25percent free area and metal louvers and grilles will have60-75percent free area. Louvers and grilles shall be fixed in the open position or interlocked with the equipment so that they are opened automatically during equipment operation.

6.Special Conditions Created by Mechanical Exhausting or Fireplaces: Operation of exhaust fans, ventilation systems, clothes dryers or fireplaces may create conditions requiring special attention to avoid unsatisfactory operation of installed gas utilization equipment.

10