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American Water Heater BBCN375T754NV User's Manual

1. 900 ETI 2100 2700 3300 3800 WATER USAGE IN GALLONS PER DAY FIGURE 8 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 UNe LIME and the booklet may be obtained through your dealer or distributor DELIMING SOLVENTS UNeLIME 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 UNeLIME 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 UneLime is not available for use in Canada Hydrochloric base acids are not recommended for use on glass lined tanks
2. CAUTION Observe handling instructions on label of product being used TANK CLEANOUT PROCEDURE 2 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 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 4 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 6 Install cleanout plate Be sure to draw plate up tight by tightening gt screws securely 7 Replace outer jacket cover plate 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 UNeLIME Professional Delimer should be used 6 OUR POSITION VENT INSTALL hy 3 4 X 3 j NIPPLE 3 4 X 4 NIPPLE we j OR DRAIN VALVE 3 NIPPLE T oo ENT A REMOVE FOAMING DELIMING COVER INDICATE
3. O00000 TROUBLE SHOOTING Please check guidelines below For your safety water heater service should be performed only by a qualified service technician Read the GENERAL SAFETY INFORMATION section first INTELLI VENT TROUBLESHOOTING CHART USER CONTROL PROBLEM Inadequate or no earth ground sensed by the Intelli Vent control Power supply to Intelli Vent control has reversed polarity or a high resistance to earth ground Pressure switch circuit remaining closed for more than 5 seconds after heating cycle begins Blower does not start Service Note Disconnect power disconnect one wire from the air pressure switch or the vent temperature limit switch Turn power back on blower should start Pressure switch circuit remains open longer than 5 seconds after the blower is energized Blower may run continuously in this condition Service Note To learn more about performing Air Pressure Switch tests visit our web site www hotwater com to download technical bulletin A 023 06 Air Pressure Switches The Intelli Vent control has detected an open ignitor circuit Service Note The resistance ohms of a hot surface ignitor will increase over time If the resistance at room temperature is near 18 8 ohms consider replacing the ignitor as a preventative measure 18 SOLUTION 1 Ensure the wall outlet is properly grounded Ensure all ground connections wires on the water heater are se
4. 105 C AND A MINIMUM SIZE OF NO 18 AWG FIGURE 4 WIRING DIAGRAM AND SCHEMATIC 8 TABLE 4 GAS SUPPLY LINE SIZES IN INCHES MAXIMUM CAPACITY OF PIPE IN CUBIC FEET PER HOUR IN INPUT IN THOUSANDS BTU HR eet ET ET oe owe sae e e e 10 175 360 80 400 2100 3960 6300 71000 230000 20 120 250 405 950 1460 2750 4260 7700 15800 a Lez 170 320 660 990 1900 3000 5300 10900 50 73 151 285 580 900 1680 2650 4750 9700 138 8800 750 8100 3 950 1500 NORMAL IRON PIPE SIZES INCHES INPUT IN KW ame 1 1150 185 6000 60 80 50 100 125 150 20 OOo OO MNIOIRIOl oO gt f o gt CO N 2 2 mn e X 8 CO oO 3192 9 4 2 1 2 5 1 7 5 10 2372 5 3 9 r 3 7 0 5 4 6 2 5 1 T 5 278 1610 BEFORE PLACING THE HEATER IN OPERATION CHECK FOR GAS LEAKAGE Use soap and water solution or other material acceptable for the purpose in locating the leaks DO NOT USE MATCHES CANDLES FLAME OR OTHER SOURCES OF IGNITION FOR THIS PURPOSE O1 O N O1 NIN O on ke HRYRL RL oT OI NI N oyo OININIJ gt IN SOI HARNESS MAIN MANUAL GAS THERMOSTAT amp GAS VALVE FIGURE 5 GAS PIPING AND SEDIMENT TRAP INSTALLATION DISCONNECT THE HEATER AND ITS MANUAL GAS SHUTOFF VALVE FROM THE GAS SUPPLY PIPING SYSTEM DURING ANY SUPPLY PRESSURE TESTING EXCEEDING 1 2 PSIG 3 45 kPa GAS SUPPLY LINE MUST
5. 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 alteration of it any operation of it in a modified form any use of insulation blankets 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
6. 1 4 inch per foot 2cm per meter Dampers or other obstructions must not be installed in between the heater and the blower Be sure that the vent pipe does not extend beyond the inside wall of the chimney Where a continuous or intermittent back draft is found to exist the cause must be determined and corrected A special vent cap may be required If the back draft cannot be corrected by the normal methods or if a suitable draft cannot be obtained a blower type flue gas exhauster must be employed to assure proper venting and correct combustion MIXING VALVE APPLICATION FOR TWO TEMPERATURE WATER HOT WATER OUTLET FROM HEATER OUTLET INSTALL THERMAL EXPANSION TANK IF CHECK VALVE OR PRESSURE REDUCING VALVE IS USED IN SUPPLY VALVE a MIXING VALVE CHECK VALVE THERMOSTAT WARNING TEMPERATURE SETTING SHOULD NOT EXCEED SAFE VACUUM RELIEF VALVE USE TEMPERATURE AT FIXTURES SEE TEMPERATURE REGULATION ON PAGE 11 TEMPERATURES ARE NECESSARY TO OBTAIN IF HIGHER PREHEAT INSTALL PER LOCAL CODES ADEQUATE BOOSTER OUTPUT ADD AN ANTI SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES CIRCULATING RETURN LINE CONNECTIONS TEMPERED WATER LOOP IF USED CONNECT TO POINT A STORED TEMPERATURE WATER LOOP IF USED CONNECT TO COLD WATER INLET CAUTION IF BUILDING COLD WATER SUPPLY HAS ABACK FLOW PREVENTER CHECK VALVE OR WATER METER WITH CHECK VALVE PROVISIONS FOR THERMAL EXPANSION OF WATER IN THE HOT WATER SYSTE
7. CONTAINERS OR ANY OTHER POTENTIAL FIRE HAZARDOUS ARTICLES MUST NEVER BE PLACED ON OR ADJACENT TO THE HEATER OPEN CONTAINERS OF FLAMMABLE MATERIAL SHOULD NOT BE STORED OR USED IN THE SAME ROOM WITH THE HEATER When installing the heater consideration must be given to proper location Location selected should be as close to the stack or chimney as practicable with adequate air supply and as centralized with the piping system as possible THE HEATER MUST NOT BE LOCATED IN AN AREA WHERE IT WILL BE SUBJECT TO FREEZING THE HEATER SHOULD BE LOCATED IN AN AREA WHERE LEAKAGE FROM THE HEATER OR CONNECTIONS WILL NOT RESULT IN DAMAGE TO THE ADJACENT AREA OR TO LOWER FLOORS OF THE STRUCTURE WHEN SUCH LOCATIONS CANNOT BE AVOIDED A SUITABLE DRAIN PAN SHOULD BE INSTALLED UNDER THE HEATER Such pans should be fabricated with sides at least 2 5cm deep with length and width at least 2 5cm greater than the diameter of the heater and must be piped to an adequate drain The pan must not restrict combustion air flow Drain pans suitable for these heaters are available from from the manufacturer authorized service agencies or distributors CLEARANCES These heaters are approved for installation on combustible flooring in a closet having a ceiling 12 30 5cm above top cover and with clearances to combustible construction of 6 15 2cm from flue or vent connector 0 Ocm at the sides and rear and 5 10 2cm to front to prevent a possible fi
8. THE SLOWER RESPONSE TIME OF CHILDREN AGED OR DISABLED PERSONS INCREASES THE HAZARDS TO THEM NEVER ALLOW SMALL CHILDREN TO USE A HOT WATER TAP OR TO DRAW THEIR OWN BATH WATER NEVER LEAVE A CHILD OR DISABLED PERSON UNATTENDED IN A BATHTUB OR SHOWER THE WATER HEATER SHOULD BE LOCATED IN AN AREA WHERE THE GENERAL PUBLIC DOES NOT HAVE ACCESS IF A SUITABLE AREAIS NOT AVAILABLE ACOVER SHOULD BE INSTALLED OVER THE THERMOSTAT TO PREVENT TAMPERING Suitable covers are available from the manufacturer authorized service agencies or distributors When ordering parts be sure to have the complete water heater Model Number Serial Number and Series Number available This information can be found on the rating label affixed to the water heater It is recommended that lower water temperatures be used to avoid the risk of scalding It is further recommended in all cases that the water temperature setting be set for the lowest temperature that satisfies your hot water needs This will also provide the most energy efficient operation of the water heater The water temperature adjustment was factory set at the lowest temperature Pressing the COOLER button decreases temperature and pressing the HOTTER button increases the temperature TEMPERATURE INDICATORS VERY HOT V8 CDE F wmn 6606000 Time to Produce 2nd amp 3rd Degree Burns on Adult Skin Display VBCDEF O0000 0000680 000800 008000 080000 80000 00000 FIGURE 6 appr
9. WATER INLET DRAIN VALVE TEMPERATURE AND PRESSURE TOP VIEW RELIEF VALVE E L GAS INLET CO INSTALL IN ACCORDANCE WITH LOCAL CODES FIGURE 1 TABLE 1 DIMENSIONS Inches 66 5 8 CM 169 22 TABLE 2 RECOVERY RATINGS INPUTRATE INPUTRATE 75 100 BTU H 58 3 4 30 15 16 27 314 15 1 4 15 3 4 16 1 1 4 1 1 4 1 2 12 1 4 134 23 78 58 70 5 38 6 o 2 40 0 40 6 3 2 NPT NPT 31 1 Recovery in US Gallons hr or Liters hr at Indicated Temperature Rise in Fahrenheit or Celsius Recovery ratings are based on 80 thermal efficiency TABLE 3 GAS AND ELECTRICAL CHARACTERISTICS Manifold Pressure Electrical Characteristics Type of gas Inches W C kPa Voltz Hz All Models Maximum supply pressure 14 0 in W C 3 48 kPa Minimum supply pressure Natural gas 6 in W C 1 49 kPa Minimum pressures must be maintained under both load and no load static and dynamic conditions FOREWORD The design of model BBCN375T754NV complies with the current edition of ANSI Z21 10 3 CSA 4 3 as automatic storage or automatic circulating tank type water heaters Installation diagrams are found in this manual These diagrams will serve to provide the installer with a reference for the materials and method of piping necessary It is highly essential that all water and gas piping be installed as shown on the diagrams In addition to these instructions the equipment shall be installed in accordance wit
10. burner orifice in accordance with the National Fuel Gas Code ANSI Z223 1 NFPA 54 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 Upon completion of derating of the heater adjustment to the gas pressure regulator may be required See CHECKING THE INPUT section in this manual for inlet and manifold pressure requirements Also due to the input rating reduction required at high altitudes the output rating of the appliance is also reduced and should be compensated for in the sizing of the equipment for application CIRCULATING PUMP A circulating pump is used when a system requires a circulating loop or there is a storage tank used in conjunction with the heater Refer to the piping diagrams at rear of manual for electrical hookup information and install in accordance with the current edition of the National Electrical Code ANSI NFPA No 70 In Canada refer to Canadian Electrical Code CSA C22 1 Only all bronze circulating pumps are used with commercial water heaters Although circulators are oiled and operated by the manufacturer s
11. include a daytime telephone number TROUBLESHOOTING Water heaters may exhibit problems that are unrelated to a malfunction of the water heater itself The following information and tables may serve to answer your question about a problem that you are having without having to call a service agent For your safety water heater service should be performed only by a qualified service technician Read the GENERAL SAFETY INFORMATION section first 16 WATER HEATING CYCLE GAS AND ELECTRIC POWER ARE ON OFF ON SWITCH IS ON 1 CALLS FOR HEAT A THERMOSTAT SENSES NEED FOR HEATING WATER B CONTACTS CLOSE IN THERMOSTAT POWER 115 VAC FLOWS TO BLOWER MOTOR BLOWER MOTOR ROTATES BLOWER WHEEL A BLOWER WHEEL SPEED INCREASES B WHEEL SPEED INCREASES AIR PRESSURE SWITCH CONTACTS CLOSE 3 120 VAC FLOWS TO HOT SURFACE IGNITER NOTE THE CONTROL MODULE ON THIS UNIT WILL TRY A MAXIMUM OF THREE TIMES TO LIGHT THE UNIT CYCLE CAN BE RESTARTED AT ANY TIME BY TURNING OFF SWITCH AND THEN TURNING BACK ON IF UNIT HAS GONE THROUGH THREE CYCLES AND DID NOT LIGHT THEN REPAIRMAN SHOULD BE CALLED TO CHECK OPERATION OF HEATER 4 MAIN BURNER IGNITES A GAS FLOWS TO MAIN BURNER PORTS AND IS IGNITED GAS VALVE SENSES BURNER FLAME BURNER HEATS WATER A BURNER HEATS WATER TO THERMOSTAT SETTING B CONTACTS IN THERMOSTAT OPEN C CYCLE IS COMPLETED TROUBLESHOOTING For your safety water heater service should be performed only by a qualifie
12. inside the blower control box and is connected to the blower housing with a tube This tubing should be soft and pliable and show no sign of deterioration RELIEF VALVE At least once a year the temperature and pressure relief valve should be checked to ensure that it is in operating condition During manual operation of this valve avoid any contact with hot water and take preventive steps for water damage Lift the lever at the top of the valve several times until the valve seats properly and operates freely WARNING THE WATER PASSING OUT OF THE VALVE DURING THIS CHECKING OPERATION MAY BE EXTREMELY HOT AVOID CONTACT AND DISCHARGE SAFELY TO PREVENT WATER DAMAGE If the temperature and pressure relief valve on the heater discharges periodically or continuously a problem exists This may be due to unusually high water temperatures or pressures in the system or to a faulty relief valve Contact your dealer or a qualified service technician to find the cause of the problem and to correct it This may also be due to thermal expansion in a closed water supply system Contact the water supplier or local plumbing inspector on how to correct this situation DO NOT PLUG THE TEMPERATURE AND PRESSURE RELIEF VALVE WARNING SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO SHUT OFF TURN OFF THE MANUAL GAS CONTROL VALVE TO THE APPLIANCE HOT WATER ODOR On occasion hot water may develop a strong odor If this occurs drain the heater
13. kPa WATER COLUMN SUPPLY PRESSURE EXPOSURE TO HIGHER GAS SUPPLY PRESSURE MAY CAUSE DAMAGE TO THE CONTROL WHICH COULD RESULT IN FIRE OF EXPLOSION If overpressure has occurred such as through improper testing of gas lines or emergency malfunction of the supply system the control must be checked for safe operation Make sure that the outside vents on the supply regulators and the safety vent valves are protected against blockage These are parts of the gas supply system not the heater Vent blockage may occur during ice storms IT IS IMPORTANT TO GUARD AGAINST GAS VALVE FOULING FROM CONTAMINANTS IN THE GAS WAYS SUCH FOULING MAY CAUSE IMPROPER OPERATION FIRE OR EXPLOSION IF COPPER SUPPLY LINES ARE USED THEY MUST BE INTERNALLY TINNED AND CERTIFIED FOR GAS SERVICE 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 ADIRT LEG SOMETIMES CALLED SEDIMENT TRAP OR DRIP LEG MUST BE INCORPORATED IN THE PIPING SEE FIG 5 THE DIRT LEG MUST BE READILY ACCESSIBLE AND NOT SUBJECT TO FREEZING CONDITIONS INSTALL IN ACCORDANCE WITH RECOMMENDATIONS OF SERVING GAS SUPPLIERS REFER TO THE CURRENT EDITION OF THE NATIONAL FUEL GAS CODE For Canadian installations consult Canadian Installation Code CAN CSA B149 1 To prevent damage care must be taken not to apply too much torque when attaching gas supply pipe to gas valve inlet Apply joint compounds pipe dope sp
14. on the sale of this heater under state or provincial law are limited to one 1 year duration for the heater or any of its parts Some states and provinces 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 American Water Heater Company PO Box 1597 500 Princeton Road Johnson City TN 37605 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 MERCHANTABILITY OF THE HEATER OR THE INSTALLATION OPERATION REPAIR OR REPLACEMENT OF THE HEATER THE WARRANTOR SHALL NOT BE RE SPONSIBLE 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 or provinces do not allow the exclusion or limitation of the inc
15. proper flame characteristics The main burner should display the following characteristics BURNER HEAD ASSEMBLY BURNER TUBE ASSEMBLY ASSEMBLY FIGURE 7 MAIN BURNER AND IGNITER ASSEMBLY Provide complete combustion of gas Cause rapid ignition and carryover of flame across entire burner Give reasonably quiet operation during ignition burning and extinction Cause no excessive lifting of flames from burner ports ON If preceding burner characteristics are not evident check for accumulation of lint or other foreign material that restricts or blocks the air openings to the heater or burner WARNING SOOT BUILD UP INDICATES A PROBLEM THAT REQUIRES CORRECTION BEFORE FURTHER USE CONSULT WITH A QUALIFIED SERVICE TECHNICIAN Should the main burner or burner air openings require cleaning remove the burner and clean with a soft brush Clean main burner orifice with a suitable soft material CHECK FOR GOOD FLOW OF COMBUSTIONAND VENTILATINGAIR TO THE UNIT MAINTAINA CLEAR OPEN AREAAROUND THE HEATER AT ALL TIMES DO NOT STORE COMBUSTIBLES OR FLAMMABLE LIQUIDS NEAR OR AROUND AN APPLIANCE CHECKING GAS INPUT For appliance installation locations with elevation above 2000 ft 610m refer to HIGH ALTITUDE INSTALLATIONS section of this manual for input reduction procedure 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
16. water faucet or if removed the relief valve opening The heater relief valve can be washed in UNeLIME if it is limed Replace relief valve if removed for deliming Restore gas oil or electrical supply to heater Check for water leakage 10 Flo Jug cleanup Allow scale to separate from UNeLIME and settle on bottom of Flo Jug Pour off UNeLIME into plastic container and check for reuse Rinse sediment from Flo Jug CHECKLIST Before contacting your dealer check the water heater to see if the apparent malfunction is caused by some external fault Consulting this checklist may eliminate the need for a repair call and restore hot water service NOT ENOUGH OR NO HOT WATER 1 Look for leaking or open hot water faucets Check for excessive usage Your gas company can check the gas input to the heater to see that it is correct An underfired heater will not produce hot water at its normal recovery rate If the heater was installed when incoming water temperatures were warm colder incoming temperatures will create the effect of less hot water The thermostat water temperature adjusting dial may be set too low If you cannot determine the cause of the problems contact your dealer WATER TEMPERATURE IS TOO HOT 1 The thermostat water temperature adjusting dial may be set too high 2 If lowering control setting does not reduce the water temperature contact your dealer GAS SMELL AT THE HEATER 1 Close the main
17. 0 w c 3 48 kPa natural gas Aservice regulator is necessary if higher gas pressures are encountered Gas pressure specified in Table 5 refer to flow pressure taken at pressure tap of automatic gas valve while heater is operating TABLE 5 Type of Manifold Gas Pressure Riera 75 100 Btu hr 4 0 in W C 22 KW hr 1 12 kPa OPERATION It is recommended that a qualified person perform the initial firing of the heater At this time the user should not hesitate to ask the individual any questions which he may have in regard to the operation and maintenance of the unit TO OPERATE THE HEATER 1 Close the heater drain valve Figure 1 by turning handle clockwise N 2 Open a nearby hot water faucet to permit the air in the system to escape 3 Fully open the cold water inlet pipe valve Figure 1 allowing the heater and piping to be filled 4 Close the hot water faucet as water starts to flow 5 The heater is ready to be operated A WARNING DO NOT ATTEMPT TO OPERATE WATER HEATER WITH COLD WATER INLET VALVE CLOSED NEVER OPERATE THE HEATER WITHOUT FIRST BEING CERTAIN IT IS FILLED WITH WATER AND A TEMPERATURE AND PRESSURE RELIEF VALVE IS INSTALLED IN THE RELIEF VALVE OPENING OF THE HEATER I FOR YOUR SAFETY READ BEFORE OPERATING 1 WARNING 1 you do not follow these instructions exactly a fire or explosion may result causing property damage personal injury or loss of life BEFORE OPERATING ENTIRE SYSTEM M
18. 0 5cm OF THE ENCLOSURE BOTTOM Each opening shall have a free area of at least one square inch per 1000 Btuh 2 225mm72 Kw of the total input of all appliances in the enclosure but not less than 100 square inches 645 square cm If the confined space is within a building of tight construction air for combustion ventilation and draft hood dilution must be obtained from outdoors When directly communicating with the outdoors or communicating with the outdoors through vertical ducts two permanent openings located in the above manner shall be provided Each opening shall have a free area of not less than one square inch per 4000 Btuh 8 900mm72 Kw of the total input of all appliances in the enclosure If horizontal ducts are used each opening shall have a free area of not less than one square inch per 2000 Btuh 4 450mm2 Kw of the total input of all appliances in the enclosure For Canadian installations consult CAN CSA B149 1 VENTING A WARNING THE INSTRUCTIONS IN THIS SECTION ON VENTING MUST BE FOLLOWED TO AVOID CHOKED COMBUSTION OR RECIRCULATION OF FLUE GASES SUCH CONDITIONS CAUSE SOOTING OR RISKS OF FIRE AND ASPHYXIATION This water heater must be protected from freezing downdrafts Remove all soot or other obstructions from the chimney that will retard a free draft Type B venting is recommended with these water heaters This water heater must be vented in compliance with all local codes the current edition of the Nati
19. A YELLOW LUMINOUS BURNER FLAME CAUSING CARBONING OR SOOTING OF THE COMBUSTION CHAMBER BURNERS AND FLUE TUBES AND CREATES A RISK OF ASPHYXIATION Where an exhaust fan is supplied in the same room with a heater sufficient openings for air must be provided in the walls UNDERSIZED OPENINGS WILL CAUSE AIR TO BE DRAWN INTO THE ROOM THROUGH THE CHIMNEY CAUSING POOR COMBUSTION SOOTING MAY RESULT IN SERIOUS DAMAGE TO THE HEATER AND RISK OF FIRE OR EXPLOSION DO NOT OBSTRUCT THE FLOW OF COMBUSTION AND VENTILATING AIR ADEQUATE AIR FOR COMBUSTION AND VENTILATION MUST BE PROVIDED FOR SAFE OPERATION UNCONFINED SPACE In buildings of conventional frame brick or stone construction unconfined spaces may provide adequate air for combustion ventilation and draft hood dilution If the unconfined space is within a building of tight construction buildings using the following construction weather stripping heavy insulation caulking vapor barrier etc air for combustion ventilation and draft hood dilution must be obtained from outdoors The installation instructions for confined spaces in tightly constructed buildings must be followed to ensure adequate air supply CONFINED SPACE When drawing combustion and dilution air from inside a conventionally constructed building to a confined space such a space shall be provided with two permanent openings ONE IN OR WITHIN 12 INCHES 30 5cm OF THE ENCLOSURE TOP AND ONE IN OR WITHIN 12 INCHES 3
20. BE CAPPED WHEN DISCONNECTED FROM THE HEATERFOR TEST PRESSURES OF 1 2 PSIG 3 45 kPa OR LESS THE APPLIANCE NEED NOT BE DISCONNECTED BUT MUST BE ISOLATED FROM THE SUPPLY PRESSURE TEST BY CLOSING THE MANUAL GAS SHUTOFF VALVE PURGING Gas line purging is required with new piping or systems in which air has entered A CAUTION PURGING SHOULD BE PERFORMED BY PERSONS EXPERIENCED IN THIS TYPE GAS SERVICE TO AVOID RISK OF FIRE OR EXPLOSION PURGE DISCHARGE MUST NOT ENTER CONFINED AREAS OR SPACES WHERE IGNITION CAN OCCUR THE AREA MUST BE WELL VENTILATED AND ALL SOURCES OF IGNITION MUST BE INACTIVATED OR REMOVED GAS METER SIZE NATURAL GASES ONLY Be sure the gas meter has sufficient capacity to supply the full rated gas input of the water heater as well as the requirements of all other gas fired equipment supplied by the meter If gas meter is too small ask the gas company to install a larger meter having adequate capacity GAS PRESSURE REGULATOR The gas pressure regulator is built into the gas valve and is equipped to operate on the gas specified on model and rating plate The regulator is factory adjusted to deliver gas to burner at correct water column pressure allowing for a nominal pressure drop through the controls The minimum gas supply pressure for input adjustment must not be less than 6 w c 1 49 kPa for natural gas and 11 w c 2 73 kPa Do not subject the combination gas valve to inlet gas pressures of more than 14
21. GE TO A SAFE LOCATION TO AVOID SCALDING OR WATER DAMAGE THIS LINE MUST NOT BE REDUCED FROM THE SIZE OF THE VALVE OUTLET AND MUST NOT CONTAIN VALVES RESTRICTIONS NOR SHOULD IT BE LOCATED IN FREEZING AREAS DO NOT THREAD OR CAP THE END OF THIS LINE RESTRICTED OR BLOCKED DISCHARGE WILL DEFEAT THE PURPOSE OF THE VALVE AND IS UNSAFE DISCHARGE LINE SHALL BE INSTALLED TO ALLOW COMPLETE DRAINAGE OF BOTH THE VALVE AND LINE See SERVICE INFORMATION section for procedure and precautions The type size and location of the relief valves must be in accordance with local codes The location of the relief valve is shown in Figure 1 The heater has a factory installed high temperature limit switch GAS PIPING 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 4 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 edition of the National Fuel Gas Code For Canadian installations consult Canadian Installation Code CAN CSA B149 1 WARNING The minimum gas supply pressure for input adjustment is 6 0 kPa W C for natural gas 11 0 kPa W C for propane THE HEATER IS NOT INTENDED FOR OPERATION AT HIGHER THAN 14
22. M MUST BE PROVIDED FIGURE 3 THERMOMETERS Not Supplied Thermometers should be obtained and field installed as shown in Figure 3 Thermometers are installed in the system as a means of detecting the temperature of the outlet water supply COMBINATION WATER POTABLE HEATING AND SPACE HEATING 1 All piping components connected to this unit for space heating applications shall be suitable for use with potable water 2 Toxic chemicals such as those used for boiler treatment shall NEVER be introduced into this system 3 This unit may NEVER be connected to any existing heating system or component s previously used with a non potable water heating appliance 4 When the system requires water for space heating at temperatures higher than required for domestic water purposes a tempering valve must be installed Please refer to installation diagram on page 6 of this manual for suggested piping arrangements 5 These water heaters cannot be used in space heating applications only A CAUTION A closed system will exist if a check valve without bypass pressure reducing valve without bypass or a water meter without bypass is installed in the cold water line between the water heater and street main or well Excessive pressure may develop in such closed systems causing premature tank failure or intermittent relief valve operation This is nota warranty failure An expansion tank or a similar device may be required in
23. MODELS BBCN375T754NV Series 100 COMMERCIAL ULTRA LOW NOx GAS WATER HEATER Glass Lined Tank type Water Heater e INSTALLATION OPERATION SERVICE MAINTENANCE e LIMITED WARRANTY At CERTIFIED www ahridirectory org GAS FIRED UL GP LISTED 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 caution Immediately call your gas supplier TEXT PRINTED OR OUTLINED IN RED CONTAINS INFORMATION RELATIVE TO YOUR SAFETY PLEASE READ THOROUGHLY from a neighbor s phone Follow oe ope INSTALLING AND USING THIS APPLIANCE the gas supplier s instructions If you cannot reach your gas supplier call the fire department we IMC CID Installation and service must be WATER HEATERS performed by a qualified installer www americanwaterheater com service agency or the gas supplier American Water Heater Johnson City TN 37605 PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE PRINTED IN U S A 1212 PART NO 325370 000 ROUGH IN DIMENSIONS K HOT WATER OUTLET K COLD
24. S POSITION DELIMING ACTIVITY FLOW JUG CARTON DRAIN POSITION De one FIGURE 9 FLO JUG METHOD OF DELIMING The Flo Jug is the standard 5 gallon container for UNeLIME or it is available as a deliming kit with hose and fittings Contact your dealer or distributor Figure 9 illustrates most of the following steps 8 1 The heater should be prepared for deliming as described in the Why When and How booklet The relief valve may also be delimed at this time 14 With the Flo Jug upright e Take off cap remove cover under opening and install 3 4 x 4 pipe nipple e Drill or punch a 3 16 vent hole in handle A stainless steel screw is included with the Flo Jug kit This screw is to be installed in the vent hole when Flo Jug is not in use e Remove drain valve from heater and insert a 3 4 x 4 nipple e Connect and clamp 1 1 D x 3 hose to Flo Jug and heater nipple Lift the Flo Jug to the POUR POSITION and permit the UNeLIME to flow into the heater as rapidly as possible e Be sure to keep the vent just above the liquid level Place the Flo Jug in the DELIME POSITION e It may be necessary to place the empty jug on its carton to trap the solution in the heater e Allow the UNeLIME to attack the water scale for 5 minutes Lower the Flo Jug to the DRAIN POSITION and allow the UNeLIME to flow out of the heater as rapidly as possible e Observe the vent holes and elevate the jug slightly if there is a possibility of s
25. UST BE FILLED WITH WATER AND AIR PURGED FROM ALL LINES FLAMMABLE A This appliance does not have a pilot It is equipped with If you cannot reach your gas supplier call the fire an ignition device which automatically lights the burner department Do not try to light the burner by hand Use only your hand to push in the control buttons BEFORE OPERATING smell all around the appliance Never use tools If the control buttons will not push area for gas Be sure to smell next to the floor because in don t try to repair them call a qualified service some gas is heavier than air and will settle on the floor technician Force or attempted repair may result in a WHAT TO DO IF YOU SMELL GAS fire or explosion Do not try to light any appliance Do not use this appliance if any part has been under Do not touch any electric switch water Immediately call a qualified service technician do not use any phone in your building to inspect the appliance and to replace any part of the Immediately call your gas supplier from a neighbor s control system and any gas control which has been phone Follow the gas supplier s instructions under water the safety information above on this label If you don t smell gas go to next step Wait five 5 minutes to clear out any gas If you then smell gas STOP Follow B in Turn on all electrical power to the appliance Set thermostat to desired setting by first pressing the COOLER and HOTTER but
26. Water ss 5 Air Requirements stateless Some ee 5 AO I E E AA 6 Thermometers Not Supplied 7 Combination Water Potable Heating and Space Heating 7 Relief Valve 7 GaS RIPIN a eee T Heater VITAE en S 8 MAIC Diag eeen e EEEa 8 PUN EENET a E E E E E P E 9 Gas Pressure Regulation 9 OPERATIONS a a me a 9 GENERAL SAFETY INFORMATION PRECAUTIONS DO NOT USE THIS WATER HEATER IF ANY PART HAS BEEN UNDER WATER Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water IF THE UNIT IS EXPOSED TO THE FOLLOWING DO NOT OPERATE HEATER UNTIL ALL CORRECTIVE STEPS HAVE BEEN MADE BY A QUALIFIED SERVICEMAN 1 EXTERNAL FIRE 2 DAMAGE 3 FIRING WITHOUT WATER 4 SOOTING Heater must be protected from freezing downdrafts during shutdown periods GROUNDING INSTRUCTIONS This water heater must be grounded in accordance with the National Electrical Code and or local codes These must be followed in all cases This water heater must be connected to a grounded metal permanent wiring system or an equipment grounding conductor must be run with the circuit conductors and connected to the equipment grounding terminal or lead on the water heater see Figure 5 Page To Operate The Heater ccccccccccsecceceeceeceeeeesseeeeeseeeeesseaees 9 Lighting HASH UCTIONS sic an
27. air 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 A G A CGA 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 and Canada 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 dirt leg 12 fired with the fuel for which it was factory built
28. all building doors and windows and all doors between the space in which the water heater s connected to the venting system are located and other spaces of the building Turn on all appliances not connected to the venting system Turn on all exhaust fans such as range hoods and bathroom exhausts so they shall operate at maximum speed Close fireplace dampers Follow the lighting instruction Place the water heater being inspected in operation Adjust thermostat so appliance shall operate continuously Test for vent system leakage after 5 minutes of main burner operation 6 After ithas been determined that each appliance connected to the venting system properly vents when tested as outlined above return doors windows exhaust fans fireplace dampers and any other gas burning appliance to their previous conditions of use 7 If improper venting is observed during any of the above tests the venting system must be corrected A WARNING FAILURE TO CORRECT BACK DRAFTS MAY CAUSE AIR CONTAMINATION AND UNSAFE CONDITIONS HIGH TEMPERATURE LIMIT SWITCH ECO The water heater is equipped with a manual reset type high limit Energy Cutoff sensor The high limit switch interrupts the main burner gas flow should the water temperature reach 195 F 90 C The high limit switch must be manually reset by turning the power to the water heater off for 5 seconds then back on and cannot be reset until the water temperature drops below 120 F 49 C I
29. anas 10 Temperature Regulation ccccscseccccsseeccseseecceseeesseseeeseases 11 Checking VSIA 2 one ann he 11 High Temperature Limit Switch 11 SERVICE INFORMATION ccccseceecsseececesesesenseeeseseresees 12 13 Main Burner and lgniter sesusicnicneiecsonsiosdnedastentuncdschadwaiemedxeseedextvnd 12 Checking Gas g 60 sn 12 Vent SV SUG Minera A ANAAO 12 Blower Maintenance ccccccsececeeecseeeeceseeeeesessueessueessaeeeees 13 Relief Valve 13 BIT VV ee OO e a 13 Winter PEOISCHOME Sa amende ee nes 13 Replacement Parts ccccscccssccecseeceeeeeceeeeceesessuseesueeesaeesees 13 PREVENTIVE MAINTENANCE 13 14 Procedure for Periodic Removal Of Lime Deposits 13 Deliming SOINS 13 Tank Cleanout Procedure ccccceeccceeeecceceeeceeseeceeseeeeeeaeeees 14 CE ere ee E E ee eee eer eee nr ee 15 16 SS AM OI Mecsas ie oss ye sg ole toate dean ees 15 AOE ene eee an ee ee ene ae eee ee 15 Service amp Repair ss 16 TROUBLES UNS snie 17 20 NOTES eee gnc esac eeepc ae eton 21 22 LIMITED WARRANTY vce ceecetecasacecnen citasaseteeul eeaasasceneu eeseeaceceensawmees 23 CHEMICAL VAPOR CORROSION WARNING CORROSION OF THE FLUEWAYS AND VENT SYSTEM MAY OCCUR IF AIR FOR COMBUSTION CONTAINS CERTAIN CHEMICAL VAPORS SUCH CORROSION MAY RESULT IN FAILURE AND RISK OF ASPHYXIATION Spray can propellants cleaning solvents refrigerator and air conditioning refrigerants s
30. aringly and only to the male threads of pipe joints Do not apply compounds to the first two threads Use compounds resistant to the action of liquefied petroleum gases HEATER WIRING All electrical work must be installed in the United States in accordance with the current edition of the National Electrical Code ANSI NFPA No 70 in Canada with the current edition of Canadian Electrical Code CSA C22 1 must conform to all local code authority having jurisdiction AN ELECTRICAL GROUND IS REQUIRED TO REDUCE RISK OF ELECTRICAL SHOCK OR POSSIBLE ELECTROCUTION If any of the original wire as supplied with the appliance must be replaced use only type 105 C thermoplastic or equivalent 250 C type F must be used for the flame sensor leads and the spark ignition cable must be high voltage 250 C A CAUTION LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS WIRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS OPERATION VERIFY PROPER OPERATION AFTER SERVICING L2 NEUTRAL TEMPERATURE SENSOR FLAME ROD HOT SURFACE IGNITER INDUCER BLOWER VALVE ELECTRONICS PRESSURE SWITCH VALVE SOLENOIDS GAS VALVE N O INTERNAL SWITCH PRESSURE SWITCHES WARNING DISCONNECT FROM ELECTRICAL SUPPLY BEFORE SERVICING UNIT REPLACE ALL DOORS AND PANELS BEFORE OPERATING HEATER IF ANY OF THE ORIGINAL WIRES SUPPLIED WITH THE APPLIANCE MUST BE REPLACED IT MUST BE REPLACED WITH APPLIANCE WIRE MATERIAL WITH MINIMUM TEMPERATURE RATING OF 221 F
31. completely flush thoroughly and refill If the problem persists chlorination of the heater and replacement of the factory installed magnesium anode with aluminum anode may correct the condition Occasionally water softener companies recommend removal of heater anodes for odor reasons CAUTION Unauthorized removal of heater anode will void the warranty Replace the anode as necessary to maintain corrosion protection For further information contact your dealer WINTER PROTECTION In regions where freezing weather is encountered all water must be drained from unit and piping when out of service water shut off Drain valve must be left open until unit is returned to service REPLACEMENT PARTS Replacement parts may be ordered from the manufacturer authorized service agencies or distributors When ordering parts be sure to have the complete water heater Model Number Serial Number and Series Number available This information can be found on the rating label affixed to the water heater Refer to the parts list included with the water heater from the factory for more information or call the parts department or technical support phone number listed on the back cover of this manual for further assistance 13 PREVENTIVE MAINTENANCE RECOMMENDED PROCEDURE FOR PERIODIC REMOVAL OF LIME DEPOSITS FROM TANK TYPE COMMERCIAL WATER HEATERS POUNDS OF LIME DEPOSITED VS TEMPERATURE AND WATER USAGE 210 180 150 120 90 60 30 0
32. cure Ensure the wall outlet is properly wired Ensure all internal 120 VAC wiring connections and wiring harness have no reversed wires 120 VAC hot wire must connect to the on off switch Ensure the wall outlet is properly grounded Ensure all ground connections wires on the water heater are secure Ensure air pressure switch circuit wiring is correct and the air pressure switch is not jumpered Secure power to water heater check continuity of air pressure switch contacts with wires disconnected If pressure switch contacts show continuity closed circuit replace the pressure switch B If pressure switch contacts are open and all wiring is correct turn the power off for 10 20 seconds then on again to clear the error code if the error code persists replace the Intelli Vent control Ensure the blower is running check for 120 VAC to the blower when the heating cycle begins check the wiring If the control does not energize the blower replace the Intelli Vent control If the blower fails to start when energized replace the blower assembly Ensure the air pressure switch sensing tube is properly connected not kinked or damaged Check continuity of vent temperature limit switch replace switch if contacts remain open under 160 F 71 C Ensure the correct size of vent pipe 2 3 4 was used per installation manual for vent length Ensure maximum number
33. d service technician Read the GENERAL SAFETY INFORMATION section first PROBLEM POSSILBE MALFUNCTION SERVICE TO BE PERFORMED 1 Blower witt not ran A ON OFF control switch turned off air switch contacts have service checked and repaired F Unit has completed three trials to light Reset cycle by turning switch off and then and fail back on If unit does not light in three tri als contact a qualified person for service 3y Thermostat problems moms Ci SOS CONDENSATION A Water on the floor under heater See Condensation Improperly sealed hot or cold supply Turn off heater amp water repair unit connections relief valve drain valve or thermostat threads WATER LEAKS Leakage from other appliances or water Inspect other appliances near water lines heater Condensation of flue products Refer to CONDENSATION Thermal expansion in closed water sys Install thermal expansion tank DO NOT tem PLUG T amp P VALVE LEAKING T amp P VALVE Improperly seated valves Check relief valve for proper operation DO NOT PLUG T amp P VALVE High sulfate or mineral content in water Drain and flush heater thoroughly chlori HOT WATER ODORS OR COLOR Refer to CATHODIC PROTECTION supply or iron or sulfate reducing bacteria nate refil and flush again then chlorinate in water supply water supply TROUBLESHOOTING GUIDELINES WATER HEATER CONTROL Ei LED STATUS 1 v BCODE F
34. e 15 0000 the black resistor wire on ignitor assembly plug is not within tolerance Air pressure switch circuit is opening repeatedly during one heating cycle May be caused by air pressure switch and or the vent temperature limit switch these two switches are wired together in a series circuit SOLUTION Turn off power to the water heater Unplug the ignitor assembly plug from the control Check the resistance of the black resistor wire between pins 3 amp 4 with an ohm meter 2 1 If the reading taken is more than 100 000 50 000 for data code before 0616 70 000 for data code 0617 through 0709 ohms replace the ignitor assembly 2 2 If the reading taken is less than 100 000 50 000 for data code before 0616 70 000 for data code 0617 through 0709 ohms replace Intelli Vent control Ensure air pressure switch hose is not kinked or clogged ensure the blower housing is clear of any condensation Check vent temperature limit switch if it is determined that the vent temperature limit switch is opening its contacts at normal operating temperatures during heating cycle replace the vent temperature limit switch Ensure water heater is not over firing 3 1 Check burner orifice size and ensure the correct orifice is installed replace as necessary 3 2 Check manifold gas pressure and ensure it is within 0 3 W C 75 Pa of listed rating on Intelli Vent control valve Manifold gas pressure i
35. e source of water leakage Close the main shutoff valve in the gas supply pipe at the heater See Figure 5 page 9 Close the valve which feeds water to the cold water inlet at the top of the heater Contact your dealer WATER HEATER MAKES SOUNDS 1 Occasional excessive condensation as explained under LEAKAGE can cause a sizzling sound as the moisture is vaporized by the gas flame This is a normal sound and may be disregarded 2 Sediment and water scale accumulations may cause rumbling noises See MAINTENANCE or contact your dealer for details of flushing the heater 3 If you cannot identify or remedy the condition contact your dealer CONDENSATION Water vapor can condense on the cooler surfaces of the tank forming droplets these drip into the fire or run out on the floor This is common at the time of startup after installation during periods of time when incoming water is very cold or the heater may be undersized for the requirements Droplets from the bottom of the flue may be due to corrosive combustion products or improper vent Check with your dealer for more information ANODE The anode rod is used to protect the tank from corrosion Most hot water tanks are equipped with an anode rod The submerged rod sacrifices itself to protect the tank Instead of corroding the tank water ions attack and eat away the anode rod This does not affect the water s taste or color The rod must be maintained to keep the tank i
36. 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 6 TABLE 6 INPUT CHECK TIME REQUIRED TO CONSUME 1 CU FT OF GAS Type of Gas BTU Per Cu Ft Time Required To Con sume 1 Cu Ft of Gas 1050 50 3 Seconds 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 h 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 Btuh Actual heater input rate Example T 47 2 seconds ft H 1 050 Btu ft natural gas Btuh 3 600 X 1 050 75 100 Btu h 22Kw 50 3 Compare the actual input rate to that given on the heater s rating plate In the example the full input rate should be 75 000 Btu h 22 Kw for natural gas VENT SYSTEM Examine the venting system every 6 months for obstructions and or deterioration of vent piping 12 BLOWER MAINTENANCE For safety and satisfactory operation it is recommended that the blower be checked once a year by a competent service person 1 MOTOR The motor is factory oiled and sealed and requires no further maintenance 2 WHEEL Wheel must be clean of soot ash or any other coating which inhibits either rotation or air flow Remove all foreign material from vent system 3 The pressure switch is
37. h those installation regulations in force in the local area where the installation is to be made These shall be carefully followed in all cases Authorities having jurisdiction should be consulted before installations are made The installation must conform to these instructions and the local code authority having jurisdiction In the absence of local codes the installation must comply with the following In the United States Current edition of the National Fuel Gas Code ANSI Z223 1 NFPA 54 and the National Electrical Code NFPA 70 In Canada Current edition of the Installation Code CAN CSA B149 1 and the Canadian Electrical Code CSA C22 1 These are available from Canadian Standards Association 8501 East Pleasant Valley Road Cleveland OH 44131 or National Fire Protection Association 1 Batterymarch Park Quincy MA 02269 TABLE OF CONTENTS Page ROUGH IN DIMENSIONSS eer onactenc denioawteateetisenawtienertcatenutee 2 FOREWORD Eee co dan pr 2 GENERAL SAFETY INFORMATION 2 4 PSC QUO S a R ee de 3 Grounding Instructions 3 Chemical Vapor Corrosion 3 Extended Non use Periods 3 Insulation Blankets 4 High Altitude Installations 4 TUN eA PUMP od aina a 4 INSTALLATION INSTRUCTIONS cccccecssssseeecesesseeeeseeeeees 4 9 Required A DIN nes 4 Locating The HORS anesan nai NENEA 4 CR ee 5 Hard
38. has reached the maximum number of retries and is currently locked out for one hour Cycle the power to the water heater off and on to reset Service Note The resistance ohms of a hot surface ignitor will increase over time If the resistance at room temperature is near 18 8 ohms consider replacing the ignitor as a preventative measure Self diagnostic tests have found a problem with the gas valve driver circuit internal microprocessor or other internal circuits Flame signal has been sensed out of proper sequence Water temperature in the tank has exceeded 195 F 91 C and has activated the ECO The self diagnostic check detected one or both of the temperature adjust buttons are stuck The self diagnostic test has detected the water temperature sensor thermistor is either open or shorted Self diagnostic test found a problem with black resistor wire on the ignitor assembly plug resistor wire is open or shorted Service Note To perform this test ohm meter used must be capable of reading up to 2 000 000 ohms Unless ohm meter used has an auto range feature resistance should be checked twice First reading will be taken using an ohms scale above 1 700 000 ohms Second reading is taken using ohms scale just above 2 000 or 5 000 ohms 19 SOLUTION Gas supply is turned off pressure too low Ensure supply and manifold gas pressures are within requirements in installation manual Manifold gas pressure i
39. idental 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 or province to province 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 s Name Dealer s Address Phone No City and State Province Zip PostalCode KEEP THIS WARRANTY POSTED ADJACENT TO THE HEATER FOR FUTURE REFERENCE 23 EI CID W ATER HEATERS P O Box 1597 Johnson City TN 37605 Phone 800 456 9805 Fax 800 999 5210 www americanwaterheater com Copyright 2012 American Water Heater Company All rights reserved
40. k water heaters Your water heater meets or exceeds the current edition of ASHRAE IES 90 1 standards with respect to insulation and standby loss requirement making an insulation blanket unnecessary WARNING Should you choose to apply an insulation blanket to this heater you should follow these instructions Failure to follow these instructions can result in fire asphyxiation serious personal injury or death e Do not apply insulation to the top of the water heater as this will interfere with safe operation e Do not cover the outer door thermostat or temperature amp pressure relief valve e Donot allow insulation to come within 2 5cm of the floor to prevent blockage of combustion air flow to the burner e Donotcover the instruction manual Keep it on the side of the water heater or nearby for future reference e Do obtain new warning and instruction labels from the manufacturer for placement on the blanket directly over the existing labels e Do inspect the insulation blanket frequently to make certain it does not sag thereby obstructing combustion air flow HIGH ALTITUDE INSTALLATIONS 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
41. n 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 technician and at a minimum should be checked annually after the warranty period A hydrogen sulfide rotten egg odor may result if water contains high sulfate and or minerals Chlorinating the water supply should minimize the problem See EXTENDED NON USE PERIODS NOTE Anode must remain installed except for inspection to avoid shortening tank life See LIMITED WARRANTY Replace as necessary SERVICE AND REPAIR The water heater requires no special care other than the normal maintenance as noted above If you are having a problem with your water heater before calling for service please refer to the following TROUBLESHOOTING sections If service becomes necessary contact your dealer installer or an authorized service agent Do not attempt to repair the water heater yourself Any work performed by unauthorized personnel may void the warranty Please be sure to provide the following information when writing or e mailing Model Number Serial Number Date of Original Purchase Date Problem Originated Explanation of Problem Also please be sure to
42. of elbows or equivalent feet of vent pipe has not exceeded maximum limits Ensure there are no obstructions in the vent pipe Check air pressure switch performance check pressure with a digital manometer check continuity of contacts see service note in left column If the switch proves defective replace the air pressure switch and or the blower assembly as required lf air pressure switch performance test results prove the air pressure switch is working properly and error code 4 persists replace the Intelli Vent control Check wiring to the hot surface ignitor replace ignitor assembly if wiring is damaged or worn Check ignitor assembly plug and the socket on the Intelli Vent body for good connection Replace ignitor assembly and or control if necessary Check resistance of ignitor at room temperature 77 F 25 C at the plug end Replace ignitor if resistance is not within 11 5 and 18 8 ohms at room temperature lf results from the above tests were good and error code 5 persists replace the Intelli Vent control TROUBLESHOOTING GUIDELINES WATER HEATER CONTROL LED STATUS TROUBLE SHOOTING Please check guidelines below For your safety water heater service should be performed only by a qualified service technician Read the GENERAL SAFETY INFORMATION section first INTELLI VENT TROUBLESHOOTING CHART USER CONTROL PROBLEM Ignition flame failure The water heater
43. ome circulators must be oiled again before operating Please refer to manufacturer s instructions INSTALLATION INSTRUCTIONS REQUIRED ABILITY INSTALLATION OR SERVICE OF THIS WATER HEATER REQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED TRADESMAN IN THE FIELD INVOLVED PLUMBING AIR SUPPLY VENTING ELECTRICAL AND GAS SUPPLY WORK ARE REQUIRED LOCATING THE HEATER A WARNING THERE IS A RISK IN USING FUEL BURNING APPLIANCES SUCH AS GAS WATER HEATERS IN ROOMS GARAGES OR OTHER AREAS WHERE GASOLINE OTHER FLAMMABLE LIQUIDS OR ENGINE DRIVEN EQUIPMENT OR VEHICLES ARE STORED OPERATED OR REPAIRED FLAMMABLE VAPORS ARE HEAVY AND TRAVEL ALONG THE FLOOR AND MAY BE IGNITED BY THE HEATER S PILOT OR MAIN BURNER FLAMES CAUSING FIRE OR EXPLOSION SOME LOCAL CODES PERMIT OPERATION OF GAS APPLIANCES IF INSTALLED 18 INCHES 45 7 CM OR MORE ABOVE THE FLOOR THIS MAY REDUCE THE RISK IF LOCATION IN SUCH AN AREA CANNOT BE AVOIDED DO NOT INSTALL THIS WATER HEATER DIRECTLY ONACARPETED FLOOR AFIRE HAZARD MAY RESULT Instead the water heater must be placed on a metal or wood panel extending beyond the full width and depth by at least 3 inches 7 6 CM in any direction If the heater is installed in a carpeted alcove or closet the entire floor shall be covered by the panel Also see the drain requirements THIS HEATER SHALL BE LOCATED OR PROTECTED SO IT IS NOT SUBJECT TO PHYSICAL DAMAGE BY A MOVING VEHICLE A WARNING FLAMMABLE ITEMS PRESSURIZED
44. onal Fuel Gas Code ANSI Z223 1 NFPA 54 and with the Category Venting Tables In Canada venting shall conform to the requirements of the current edition of the CAN CSA B149 1 00 installation code If any part of the vent system are exposed to ambient temperatures below 35 degrees F 2 degrees C it must be insulated to prevent condensation e Do not connect the heater to a common vent or chimney with solid fuel burning equipment This practice is prohibited by many local building codes as is the practice of venting gas fired equipment to the duct work of ventilation systems e Where a separate vent connection is not available and the vent pipe from the heater must be connected to a common vent with an oil burning furnace the vent pipe should enter the smaller common vent or chimney at a point above the large vent pipe SINGLE TEMPERATURE HOT COLD WATER WATER OUTLET TEMPERED COLD WATER WATER OUTLET TEMPERATURE AND PRESSURE 12 30CM RELIEF VALVE TO 15 40CM HEATER CORRECT METHOD OF VENT PIPE INSTALLATION INCORRECT INSTALLATION WITH NO UPWARD ANGLE PROVIDE MAXIMUM VERTICAL RISE OF VENT PIPE DIRECTLY ABOVE HEATER BLOWER OUTLET FIGURE 2 VENT CONNECTION Vent connections must be made to an adequate stack or chimney Size and install proper size vent pipe Do not reduce pipe size to less than that of the blower outlet Horizontal runs of vent pipe must have a minimum upward slope toward the chimney of
45. ox 180 F 82 C 170 F 77 C 160 F 71 C 150 F 65 C 140 F 60 C 130 F 54 C 120 F 49 C Nearly Instantaneous Nearly Instantaneous About 1 2 Second About 1 1 2 Seconds Less than 5 Seconds More than 30 Seconds More than 5 Minutes approx approx approx approx approx approx 11 SETTING THE WATER HEATER TEMPERATURE AT 120 F 49 C APPROX W MARK ON FACE OF THE TEMPERATURE ADJUSTING DIAL WILL REDUCE THE RISK OF SCALDS Some States or Provinces require settings at specific lower temperatures Figure 6 shows the approximate water temperatures produced at various thermostat settings Short repeated heating cycles caused by small hot water uses can cause temperatures at the point of use to exceed the thermostat setting by up to 20 F 11 C If you experience this type of use you should consider using lower temperature settings to reduce scald hazards Valves for reducing point of use temperature by mixing cold and hot water are available Also available are inexpensive devices that attach to faucets to limit hot water temperatures Contact a licensed plumber or the local plumbing authority To avoid any unintentional changes in water temperature settings the control has a tamper resistant feature for changing the temperature setting To change the temperature setting follow these instructions 1 Wake Up the temperature indicators by holding down both the COOLER and HOTTER temperature adju
46. pillage e Deliming activity is indicated by foaming on the surface of the solution Continue the deliming process e Raise jug to POUR POSITION Allow solution to flow into heater e Place jug in DELIME POSITION for 5 minutes Solution is at work in heater e Lower jug to DRAIN POSITION and allow solution to flow out Observe foaming After one hour or earlier if the deliming activity foaming stops inspect the tank interior e Drain the UNeLIME back into jug DRAIN POSITION and then stand jug in DELIME POSITION e Remove the clamp hose and the pipe nipple from heater drain opening e Observe interior through opening a small flashlight may be used effectively e Ifthe interior still shows water scale the deliming process should be continued e To check UNeLIME for continued use or reuse place some lime scale or white chalk into a glass with a small amount of solution If the material is vigorously dissolved by the solution the UNeLIME can be reused If not the UNeLIME has been weakened and should be replaced When deliming has been completed the heater should be flushed for 3 to 5 minutes with fresh water e Remove the deliming equipment install the drain valve open the cold water inlet line and allow water to flow through heater and out drain valve Don t forget to plug vent and cap opening in Flo Jug When flushing is completed Fill heater being certain to expel air from tank through a nearby hot
47. re hazard condition A minimum of 4 10 2cm shall be allowed for installation of serviceable parts 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 MAINTENANCE section for details of tank cleanout procedure AIR REQUIREMENTS REFER TO CURRENT EDITION OF THE NATIONAL FUEL GAS CODE ANSI 2Z223 1 NFPA 54 FOR CANADA CONSULT CAN CSA B149 1 KEEP APPLIANCE AREA CLEAR AND FREE OF COMBUSTIBLE MATERIALS GASOLINE AND OTHER FLAMMABLES VAPORS AND LIQUIDS DO NOT OBSTRUCT THE FLOW OF THE COMBUSTION OR VENTILATING AIR A WARNING ATTIC AND OR EXHAUST FANS OPERATING ON THE PREMISES WITH A WATER HEATER CAN RESULT IN CARBON MONOXIDE POISONING AND DEATH OPERATION OF THESE FANS CAN PRODUCE ANEGATIVE DRAFT IN THE AREA OF THE WATER HEATER PREVENTING THE PRODUCTS OF COMBUSTION FROM EXHAUSTING THROUGH THE CHIMNEY OR VENT PIPE The venting of the water heater should be inspected by a qualified service technician at the time of installation and periodically thereafter to ensure a down draft condition does not exist A WARNING FOR SAFE OPERATION PROVIDE ADEQUATE AIR FOR COMBUSTION AND VENTILATION AN INSUFFICIENT SUPPLY OF AIR WILL CAUSE RECIRCULATION OF COMBUSTION PRODUCTS RESULTING IN AIR CONTAMINATION THAT MAY BE HAZARDOUS TO LIFE SUCH A CONDITION OFTEN WILL RESULT IN
48. s non adjustable if manifold gas pressure is off by more than 0 3 W C 75 Pa replace the Intelli Vent control Ensure condensate lines are not obstructed Check and clear all condensate lines including the floor condensate drain line 22 Limited Warranty American Water Heater Company 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 wa ter therein during the first THREE years after initial installation the warrantor will supply a complete new American 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 American Water Heater Company 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 rep
49. s non adjustable if pressure is off by more than 0 3 W C 75 Pa replace Intelli Vent control Low supply voltage should be 115 125 VAC Ensure flame sensor is making good contact with burner flame ensure flame is steady see 8 below Ensure the flame sensor is clean use ultra fine steel wool or Scotch Brite pad to clean flame sensor Ensure the hot surface ignitor is positioned to provide consistent ignition Check for any cracks in ignitor assembly ceramic insulators replace ignitor assembly if damaged Check resistance of ignitor at room temperature 77 F 25 C at the plug end Replace ignitor if resistance is not within 11 5 and 18 8 ohms at room temperature Ensure correct size of vent pipe 2 3 4 was used per installation manual for vent length Using larger pipe than required may cause excessive air turbulance in combustion chamber Turn the power off for 10 20 seconds then on again to clear these error codes lf any of these error codes persist or cannot be cleared replace the Intelli Vent control Turn the power off for 10 20 seconds and then on again to clear this error code Replace the Intelli Vent control if this error code persists Turn the power off for 10 20 seconds then on again to clear this error code Replace the Intelli Vent if the error code persists Press and release temperature adjust buttons If above ac
50. shutoff valve in the gas supply pipe near the heater see Figure 5 on page 9 The thermostat includes a gas control top knob which can also be closed 2 Call your gas company WATER LEAKAGE IS SUSPECTED 1 Check to see if the heater drain valve is tightly closed 2 The apparent leakage might be condensation In warm or humid locations condensation can accumulate and run from within the heater or its piping 15 When a water heater is first installed and filled the bottom of the tank might condense water The water accumulation if excessive can drip into the floor shield Also during normal operation there may be occasions when large quantities of water are drawn chilling the tank bottom This too can result in condensation Condensation appearing in the vent pipe water dripping from draft diverter during heater operation is evidence of poor vent action Possible causes are too long a vent pipe or improper chimney operation If the leakage is from the temperature and pressure relief valve or its discharge pipe it may represent a normal condition However see RELIEF VALVE section on page 7 DO NOT PLUG THE TEMPERATURE AND PRESSURE RELIEF VALVE Also the leakage could be due to unusually high water pressures or temperatures in the system or to a faulty relief valve Your dealer or a qualified service technician should be called to determine the cause of the problem and to correct it If you cannot identify or correct th
51. stment buttons at the same time for one second see Figure 6 One or two of the temperature indicators will light up These indicators will only remain on for 30 seconds if no further buttons are pressed After 30 seconds the control will go back to Sleep mode Release both of the temperature adjustment buttons A To decrease the temperature press and release the COOLER button until desired setting is reached To increase the temperature press and release the HOTTER button until the desired setting is reached NOTE Holding down the button will not continue to lower or raise the temperature setting The button must be pressed and released for each temperature change desired SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO SHUT OFF TURN OFF THE MAIN MANUAL GAS SHUTOFF VALVE TO THE APPLIANCE SEE FIGURE 1 G CHECKING VENTING The following steps shall be followed with each appliance connected to the venting system placed in operation while any other appliances connected to the venting system are not in operation 1 Seal any unused openings in the venting system 2 Inspect the venting system for proper size and horizontal pitch as required in the National Fuel Gas Code ANSI Z223 1 NFPA 54 or the CAN CSA B149 1 Installation codes and these instructions Determine that there is no blockage or restriction leakage corrosion and other deficiencies which could cause an unsafe condition So far as is practical close
52. t is important that a serviceman be called to determine the reason for limit operation and thus avoid repeated thermostat resetting WARNING THE ON OFF SWITCH MUST HAVE BEEN IN THE OFF POSITION FOR AT LEAST 5 MINUTES This waiting period is an important safety step Its purpose is to permit gas that may have accumulated in the combustion chamber to clear IF YOU DETECT GAS ODOR AT THE END OF THIS PERIOD DO NOT PROCEED WITH LIGHTING RECOGNIZE THAT GAS ODOR EVEN IF IT SEEMS WEAK MAY INDICATE PRESENCE OF ACCUMULATED GAS SOMEPLACE IN THE AREA WITH RISK OF FIRE OR EXPLOSION SEE THE FRONT PAGE FOR STEPS TO BE TAKEN SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO SHUT OFF TURN OFF THE MANUAL GAS CONTROL VALVE TO THE APPLIANCE SERVICE INFORMATION The installer may be able to observe and correct certain problems which may arise when the unit is put into operation HOWEVER it is recommended that only qualified servicemen using appropriate test equipment be allowed to service the heater FOR YOUR SAFETY AND SATISFACTORY OPERATION IT IS RECOMMENDED THAT THIS HEATER BE CHECKED ONCE A YEAR BY ACOMPETENT SERVICE PERSON USERS OF THIS WATER HEATER SHOULD BE AWARE THAT GAS COMPONENTS WEAR OUT OVER A PERIOD OF TIME THE GAS CARRYING COMPONENTS OF THIS WATER HEATER SHOULD BE INSPECTED FOR PROPER OPERATION PERIODICALLY BY A QUALIFIED SERVICE TECHNICIAN MAIN BURNER AND IGNITER Check main burner figure 7 at least every 6 months for
53. the inlet supply line between the appliance and the meter or valve to compensate for the thermal expansion of the water SYSTEM CONNECTIONS The system installation must conform to these instructions and to the local code authority having jurisdiction Good practice requires that all heavy piping be supported RELIEF VALVE This water heater is equipped with a combination temperature pressure relief valve that complies with the standard for relief valves for hot water supply systems Z21 22 CSA 4 4 FOR SAFE OPERATION OF THE WATER HEATER THE RELIEF VALVE S MUST NOT BE REMOVED OR PLUGGED ASME ratings cover pressure relief capacities ANSI ratings cover release rate with temperature actuation In addition to the appliance relief valve each remote storage tank which may be used in conjunction with this appliance shall also be installed with a properly sized rated and approved combination temperature ANSI and pressure ASME relief valve s This valve shall comply with the standard for relief valves for hot water supply systems Z21 22 CSA 4 4 A WARNING THE PURPOSE OF RELIEF VALVE IS TO AVOID EXCESSIVE PRESSURE OR TEMPERATURE INTO THE STEAM RANGE WHICH MAY CAUSE SCALDING AT FIXTURES TANK EXPLOSION SYSTEM OR HEATER DAMAGE NO VALVE IS TO BE PLACED BETWEEN THE RELIEF VALVE AND TANK Your local code authority may have other specific relief valve requirements A DRAIN LINE MUST BE CONNECTED TO THE RELIEF VALVE TO DIRECT DISCHAR
54. tion does not clear error control will continue to regulate water temperature at last setting However settings will no longer be adjustable the control should be replaced Turn power off for 10 20 seconds then on again to clear this error code Replace the Intelli Vent control if this error code persist Turn off power to the water heater Insure black resistor wire is not cut missing and is installed between pins 3 amp 4 of ignitor assembly plug Replace ignitor assembly if damaged or defective Unplug ignitor assembly plug from control Check resistance of black resistor wire between pins 3 amp 4 with an ohm meter 3 1 If reading taken is less than 2000 5000 for date code 0617 through 0709 or more than 1 7 million ohms replace ignitor assembly 3 2 If reading taken is between 2000 5000 for date code 0617 through 0709 and 1 7 million ohms replace Intelli Vent control Service Note Raised ridges on ignitor assembly plug identify 1 2 and 3 pins The four digit date code can be found on side of the controller WATER HEATER CONTROL TROUBLESHOOTING GUIDELINES TROUBLE SHOOTING Please check guidelines below For your safety water heater service should be performed only by a qualified service technician Read the GENERAL SAFETY INFORMATION section first INTELLI VENT TROUBLESHOOTING CHART USER CONTROL LED STATUS PROBLEM v B CD E F Theself diagnostic test determined resistanc
55. tons together and holding for 1 second Then press the HOTTER button If the appliance will not operate follow the STOP Read the safety information above instructions TO TURN OFF GAS TO APPLIANCE on this label and call your technician or gas supplier Set the thermostat to the lowest setting by first pressing _ WATER TEMPERATURE ADJUSTMENT the COOLER and HOTTER buttons together and holding for 1 second Then press the COOLER v is approximately 120 F 49 C button until the WARM indicator light appears OFF position of scald injury Consult the instruction Turn the ON OFF swich on the blower control to the CAUTION Hotter water increases the risk manual before changing temperatures This appliance is equipped with a device which WARNING TURN OFF ALL ELECTRIC automatically lights the burner POWER BEFORE SERVICING DO NOT TRY TO LIGHT THE BURNER BY HAND fis TO TURN OFF GAS TO APPLIANCE _ A Set thermostat to the lowest setting B Turn off all the electric power to the appliance if service is to be performed 10 TEMPERATURE REGULATION DANGER DANGER THIS WATER HEATER IS EQUIPPED WITH AN ADJUSTABLE THERMOSTAT TO CONTROL WATER TEMPERATURE HOT WATER TEMPERATURES REQUIRED FOR AUTOMATIC DISHWASHING AND LAUNDRY USE CAN CAUSE PAINFUL SCALDING WITH POSSIBLE SERIOUS AND PERMANENT INJURY THE TEMPERATURE AT WHICH INJURY OCCURS VARIES WITH THE PERSON S AGE AND THE TIME OF THE EXPOSURE
56. wimming pool chemicals calcium and sodium chloride water softener salt waxes and process chemicals are typical compounds which are potentially corrosive Do not store products of this sort near the heater Also air which is brought in contact with the heater should not contain any of these chemicals If necessary uncontaminated air should be obtained from remote or outside sources The limited warranty is voided when failure of water heater is due to a corrosive atmosphere Refer to the limited warranty for complete terms and conditions EXTENDED NON USE PERIODS WARNING HYDROGEN GAS CAN BE PRODUCED IN A HOT WATER SYSTEM SERVED BY THIS HEATER THAT HAS NOT BEEN USED FORALONG PERIOD OF TIME GENERALLY TWO WEEKS OR MORE HYDROGEN GAS IS EXTREMELY FLAMMABLE To reduce the risk of injury under these conditions it is recommended that the hot water faucet be opened for several minutes at the kitchen sink before using any electrical appliance connected to the hot water system If hydrogen is present there will probably be an unusual sound such as air escaping through the pipe as the water begins to flow THERE SHOULD BE NO SMOKING OR OPEN FLAME NEAR THE FAUCET AT THE TIME IT IS OPEN INSULATION BLANKETS Insulation blankets available to the general public for external use on gas water heaters are not required for use on your water heater The purpose of an insulation blanket is to reduce the standby heat loss encountered with storage tan

American Water Heater BBCN375T754NV User's Manual

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