Instruction Manual forResidential Direct VentGas Water HeatersNOT FOR USE IN MANUFACTURED (MOBILE) HOMESGAMA certification applies to allresidential gas water heaters withcapacities of 20 to 100 gallonswith input rating of 75,000BTU/Hr. or less.ALL TECHNICAL AND WARRANTY QUESTIONS: SHOULD BE DIRECTED TO THE LOCAL DEALER FROMWHOM THE WATER HEATER WAS PURCHASED. IF YOU ARE UNSUCCESSFUL, PLEASE WRITE TO THECOMPANY LISTED ON THE RATING PLATE THE WATER HEATER.For Your SafetyAN ODORANT IS ADDED TO THE GASUSED BY THIS WATER HEATERWARNING: If the information in theseinstructions are not followed exactly, a fireor explosion may result, causing propertydamage, personal injury, or death.–Do not store or use gasoline or otherflammable vapors and liquids in the vicinityof 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; donot use any phone in your building. Immediately call your gas supplier from aneighbor’s phone. Follow the gas supplier’s instructions. If you can not reach your gas supplier,call the fire department.–Installation and service must be performedby a qualified installer, service agency orthe gas supplier.Save this Manual for Future Reference.WARNINGImproper installation, adjustment, alteration,service or maintenance can cause DEATH,SERIOUS BODILY INJURY, OR PROPERTYDAMAGE. Refer to this manual for assistanceor consult the local gas utility for furtherinformation.WARNINGFlammable vapors may be drawn by air currents from other areas of the structure to thisappliance.WARNINGREAD THE GENERAL SAFETY SECTIONBEGINNING ON INSIDE COVER AND THENTHIS ENTIRE MANUAL BEFORE INSTALLINGOR OPERATING THIS WATER HEATER.183774-00007-02

General SafetyWARNINGWARNINGImproper installation, adjustment, alteration, service or maintenance can cause DEATH, SERIOUS BODILY INJURY OR PROPERTY DAMAGE. Refer to this manual for assistance or consultthe local gas utility and/or plumbing contractor.INSTALLATION IN AREAS WHERE FLAMMABLE LIQUIDS(VAPORS) ARE LIKELY TO BE PRESENT OR STORED(GARAGES, STORAGE, AND UTILITY AREAS, ETC): Flammableliquids (such as gasoline, solvents, propane (LP) or butane,etc.), all of which emit flammable vapors, may be improperlystored or used in such areas. The gas water heater pilot light ormain burner can ignite such vapors. The resulting flashbackand fire can cause death or serious burns to anyone in thearea, 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 pilot flame andmain burner flame are elevated from the floor at least 18 inches. While this may reduce the chances of flammable vaporsfrom a floor spill being ignited, gasoline and other flammablesubstances should never be stored or used in the same room orarea containing a gas water heater or other open flame orspark producing appliance.NOTE: Flammable vapors may be drawn by air currents fromother areas of the structure to the appliance.WARNINGFor protection against excessive pressures and temperatures inthis water heater, install temperature-pressure protectiveequipment required by local codes, but not less than a combination temperature-pressure relief valve certified by nationallyrecognized testing laboratory that maintains periodic inspection of production of listed equipment or materials, as meetingthe requirements for Relief Valves and Automatic Gas ShutoffDevices for Hot Water Supply Systems, the current editionANSI Z21.22. This valve must be marked with a maximum setpressure not to exceed the marked hydrostatic working pressure of the water heater (150 lbs./sq. in.). The relief valve mustbe marked with a discharge capacity not less than the waterheater Btu input rate as shown on the model rating plate.Install the temperature-pressure relief valve directly into thefitting of the water heater. Position the valve downward andprovide tubing so that any discharge will exit only within 6inches above, or at any distance below the structural floor. Becertain that no contact is made with any live electrical part.The discharge opening must not be blocked or reduced in sizeunder any circumstances. Excessive length, over 30 feet, or useof more than four elbows can cause restriction and reduce thedischarge capacity of the valve.No valve or other obstruction is to be placed between therelief valve and the tank. Do not connect tubing directly to discharge drain unless a 6″ air gap is provided. To prevent bodilyinjury, hazard to life, or damage property, the relief valve mustbe allowed to discharge water in quantities should circumstances demand. If the discharge pipe is not connected to adrain or other suitable means, the water flow may cause property damage.The Discharge Pipe:–Must not be smaller in size than the outlet pipe size of thevalve, or have any reducing couplings or other restriction.–Must not be plugged or blocked.–Must be of material listed for hot water distribution.–Must be installed so as to allow complete drainage of both thetemperature-pressure relief valve, and the discharge pipe.–Must terminate at an adequate drain.–Must not have any valve between the relief valve and tank.WARNINGHOTTER WATER CAN SCALD: Water heaters are intended toproduce hot water. Water heated to a temperature which willsatisfy clothes washing, dish washing, and other sanitizingneeds can scald and permanently injure you upon contact.Some people are more likely to be permanently injured by hotwater than others. These include the elderly, children, theinfirm, or physically/mentally handicapped. If anyone using hotwater in your home fits into one of these groups or if there is alocal code or state law requiring a certain temperature waterat the hot water tap, then you must take special precautions. Inaddition to using the lowest possible temperature setting thatsatisfies your hot water needs, a means such as a mixing valve,should be used at the hot water taps used by these people or atthe water heater. Mixing valves are available at plumbing supply or hardware stores. Follow manufacturers instructions forinstallation of the valves. Before changing the factory settingon the thermostat, read the “Temperature Regulation” sectionin this manual.WARNINGBEFORE LIGHTING [PROPANE (L.P.) GAS WATER HEATERS]:Propane (L.P.) gas is heavier than air. Should there be a leak inthe system, the gas will settle near the ground. Basements,crawl spaces, skirted areas under manufactured (mobile)homes (even when ventilated), closets and areas below groundlevel will serve as pockets for the accumulation of this gas.Before attempting to light or relight the water heater’s pilot orturning on a nearby electrical light switch, be absolutely surethere is no accumulated gas in the area. Search for odor of gasby sniffing at ground level in the vicinity of the appliance. Ifodor is detected, follow steps indicated at “For Your Safety” onthe cover page of this manual then leave the premises.WARNINGA fire can start if combustible materials such as clothing, cleaning materials, or flammable liquids are placed against or next tothe water heater.WARNINGWATER HEATERS EQUIPPED FOR ONE TYPE GAS ONLY: Thiswater heater is equipped for one type gas only. Check the ratingplate near the gas control valve for the correct gas. DO NOTUSE THIS WATER HEATER WITH ANY GAS OTHER THAN THEONE SHOWN ON THE MODEL RATING PLATE. Failure to usethe correct gas can cause problems which can result in DEATH,SERIOUS BODILY INJURY, OR PROPERTY DAMAGE. If youhave any questions or doubts consult your gas supplier or localutility.WARNINGThis water heater must not be installed directly on carpeting.Carpeting must be protected by a metal or wood panel beneaththe appliance extending beyond the full width and depth of theappliance by at least 3 inches (76.2mm) in any direction, or if theappliance is installed in an alcove or closet, the entire floor mustbe covered by the panel. Failure to heed this warning may resultin a fire hazard.2

General Safety (cont’d)WARNINGWARNINGA gas water heater cannot operate properly without the correctamount of combustion air and ventilation air. Refer to“Locating The New Water Heater” and “Combustion Air andVentilation” sections. Never obstruct the flow of combustionand ventilation air. If you have any doubts or questions at all,call your gas company. Failure to provide the proper amount ofcombustion air can result in a fire or explosion and can causeDEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE.Chemical vapor corrosion of the flue and vent system mayoccur if air for combustion contains certain chemical vapors.Spray can propellants, cleaning solvents, refrigerator and airconditioner refrigerants, swimming pool chemicals, calciumand sodium chloride, waxes, bleach, and process chemicals aretypical compounds which are potentially corrosive.WARNINGMinimum clearances between the water heater and combustibleand noncombustible construction are: 0 inches from sides, 0inches from back, 4 inches from front of jacket to closet door and3 inches from top of jacket to combustible and noncombustibleceiling. Minimum vent clearance: 0 inches. Note: provide 24inches front clearance for servicing. (See Figure 1) Page 7.WARNINGIf this water heater will be used in beauty shops, barber shops,cleaning establishments, or self-service laundries with drycleaning equipment, it is imperative that the water heater orwater heaters be installed so that combustion and ventilationair be taken from outside these areas. Refer to the “LocatingThe New Water Heater” section of this manual and also thecurrent edition of the National Fuel Gas Code, ANSI Z223.1,also referred to as NFPA 54 for specifics provided concerningair required.WARNINGHYDROGEN GAS: Hydrogen gas can be produced in a hot watersystem that has not been used for a long period of time (generallytwo weeks or more). Hydrogen gas is extremely flammable andexplosive. To prevent the possibility of injury under these conditions, we recommend the hot water faucet be opened for severalminutes at the kitchen sink before any electrical appliances whichare connected to the hot water system are used (such as a dishwasher or washing machine). If hydrogen gas is present, there willprobably be an unusual sound similar to air escaping through thepipe as the hot water faucet is opened. There must be no smokingor open flame near the faucet at the time it is open.WARNINGNo vent damper installation is compatible with this direct ventwater heater design. No vent damper, whether it is operatedthermally or otherwise is to be installed on this direct ventwater heater. Alteration of any part of the factory-furnishedvent assembly could result in improper operation due torestriction of flue gases, spillage of flue gases and may causecarbon monoxide poisoning.WARNINGINSULATING JACKETS: When installing an external water heaterinsulation jacket on a gas water heater:a. DO NOT cover the temperature-pressure relief valve.b. DO NOT put insulation over any part of the top of the gaswater 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 getwithin 8 inches of the floor (air must get to the burner).e. DO NOT cover or remove operating instructions, and safetyrelated warning labels and materials affixed to the waterheater.Failure to heed this will result in the possibility of a fire orexplosion.WARNING1. 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 1 2pound per square inch (3.5kPa).2. The appliance must be isolated from the gas supply pipingsystem by closing its individual manual shutoff valve during anypressure testing of the gas supply piping system at test pressures equal or less than 1 2 pound per square inch (3.5kPa).WARNINGSoot build-up indicates a problem that requires correctionbefore further use. Turn “OFF” gas to water heater and leave“OFF” until repairs are made, because failure to correct thecause of the sooting can result in a fire or explosion causingDEATH SERIOUS BODILY INJURY OR PROPERTY DAMAGE.WARNINGFlood damage to a water heater may not be readily visible orimmediately detectible. However, over a period of time a floodedwater heater will create dangerous conditions which can causeDEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE.Call a qualified service technician or contractor to replace aflooded water heater. Do not attempt to repair the unit! It must bereplaced!WARNINGThe water heater must be properly vented to the outdoors.Never operate the water heater unless it is vented to the outdoors and has adequate air supply to avoid risks of improperoperation, explosion or asphyxiation.CAUTIONWATER HEATERS EVENTUALLY LEAK: Installation of the waterheater must be accomplished in such a manner that if the tank orany connections should leak, the flow of water will not causedamage to the structure. For this reason, it is not advisable toinstall the water heater in an attic or upper floor. When such locations cannot be avoided, a suitable drain pan should be installedunder the water heater. Drain pans are available at your localhardware store. Such a drain pan must be not greater than 11 2inches deep, have a minimum length and width of at least 2 inchesgreater than the water heater dimensions and must be piped to anadequate drain. The pan must not restrict combustion air flow.Under no circumstances is the manufacturer to be held liable forany water damage in connection with this water heater.WARNINGVent termination must not be within 4 feet of any items such asgas meters, gas valves or other gas regulating equipment.WARNINGObstructed or deteriorated vent systems may present a serioushealth risk or asphyxiation.3

Table of ContentsGeneral Safety.2,3Table of Contents .4Introduction .5Preparing for the New Installation .5Typical Installation .6Locating the New Water Heater .7-10Facts to Consider About Location .7Combustion Air and Ventilation .7,8Venting Clearances.7,8Optional Wire Grill .8Flue Extentions .9,10Vertical (Extension Kit) Height .9Horizontal (Extension Kit) .10Installing the New Water Heater .10-27All Installations.10Standard Vent Kit Installation.11-13Optional Vertical Kit Installation.14-16Optional Horizontal Kit Installation.17-19Optional Vertical and Horizontal Kit Installation .20-23Supplementary Vent Cap Installation .24,25Water Piping .26Temperature-Pressure Relief Valve .27Filling the Water Heater.27Gas Piping.28Installation Checklist .29Lighting .30,31Temperature Regulation .32For Your Information .33,34Start Up Conditions .33Condensation .33Smoke/Odor .33Thermal Expansion .33Strange Sounds .33Operational Conditions .33,34Smelly Water.33,34“Air” In Hot Water Faucets .34High Temperature Shut Off System .34Not Enough or No Hot Water .34Water Is Too Hot .34Periodic Maintenance .34-36Venting System Inspection .