s manual - AO Smith Water Heaters
Contents
1. 3 Kw to 50 000 blu Minimum 3 f 91 em S Kn pui and 2 or appliances greater 50 000 btuh 15 Kw to 3 window or door ihat may be opened Minimum 3 ft 91 cm within a height of 15 t 4 6 m above ECIEU inotervgutatorascombiy above grade or expected snow fall Minimum 3 ft 91 cm clearance to service regulator vent outlet ein Gos emmy KR Minimum 12in 305 cm under veranda porch dack or balcony Minimum seo footnote 1 7H 213 em public sidewalk Minimum Bove if with ova f within 01 Qm ar paved Sena ct Toonas a 2 notizontally to a notarios air Supply inet go at Minimum Minimum 9 in 23 cm for appliances with 10 000 btuh 3 Kw Jai 305 cm 1o 50 060 pian 15 on spate and i GOS en for appliances greater from sides above or below a permanently closed window or door than 50 000 btuh 15 Kw to a non mechanical air supply inlet Into building or combustion air inlet to another applianco V VENT TERMINAL GO AIRSUPPLYINLET Xi AREA WHERE TERMINAL IS NOT PERMITTED 1 Permitted only if veranda porch deck or balcony is fully opened on a minimum af two sides beneath the floor 2 A vent shall not terminate above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings FIGURE 4 6 A WARNING VENT TERMINATION MUST NOT BE WITHIN 4 FEET 122 cm OFANYITEMS SUCHAS GAS METERS GAS VALVES OR OTHER GAS REGULATING EQ2. any part of the control system and any gas control which has been under water OPERATING INSTRUCTIONS D Y imo o 5 o 1 STOP Read the safety information above on this label 2 Set the ON OFF switch on the control box to the ON position 3 Set the thermostat to the lowest setting by first pressing the COOLER and HOTTER buttons together and holding for 1 second Then press the COOLER button amp until the WARM indicator light appears 4 Set the ON OFF switch on the control box to the OFF position 5 This appliance is equipped with a device which automatically lights the burner DONOT TRY TO LIGHT THE BURNERBY HAND 6 Waitfive 5 minutes to clear outany gas If you then smell gas STOP Follow B in the safety information above on this label If you don t smell gas go to the next step 7 Tum on all electrical power to the appliance 8 Setthe ON OFF switch on the control box to the ON position 9 Set the thermostat to desired setting by first pressing the COOLER and HOTTER buttons together and holding for 1 second Then press the HOTTER button 10 WATER TEMPERATURE ADJUSTMENT Y is approximately 120 F 49 C A T CAUTION Hotter water increases the risk of scald injury Consult the instruction manual before changing temperature If the appliance will not operate follow the instructions TO TURN OFF GAS TO APPLIANCE and call your tech
3. FIGURE 15 2 The total vertical and horizon ntal vent runs cannot exceed the maximum length with the number of 90 elbows as specified in the table below If more elbows are required the venting distance must be reduced 5 feet 1 52 m for every 90 elbows FIGURE 12 The vent piping can be installed as follows 1 Horizontal runs require a minimum 1 8 3 2mm rise per 5 1 52 m 3 DIA VENTS NUMBER OF 90 DEG MAX LENGTH FT ELBOWS 45 1372 m 1 40 12 2 m 2 35 10 7 m 3 3 ELBOW EXAMPLE m MIN RISE 1 8 3 2 mm PER FIVE FEET 1 52 m NOTE Two 45 elbows are equi 90 elbow equals 5 feet 1 52 m of equivalent vent length ivalent to one 90 elbow One FIGURE 13 1 ELBOW 45 1372 m MAX EXAMPLE A 45 7 cm UIN gt EE HE 93 7 cm MIN B cm miN MIN RISE 1 8 3 2 mm PERS 1 52 m FIGURE 16 3 Minimum vent length for all models is 18 inches 45 7 cm 1818007 NE ime jl i MIN RISE 4 8 52 mr PER 5 1 52 m 17 8 em NEELBON LM FIGURE 17 Cementing PVC ABS or CPVC Pipe and Fittings Read and observe all safety information printed on printer cleaner and cement container A DANGER Primer cleaner and cements are extremely flammable They are harmful or fatal if swallowed The vapo
4. SAFETY INFORMATION section first PROBLEM An open earth ground circuit to the ignition system SOLUTION 1 Check that the earth ground connection is properly connected 2 Check that the ground conductor on the water heater is properly connected Wiring error or a high resistance to earth ground Check for proper connection of line neutral and hot wires Check that the water heater is securely connected to earth ground Pressure switch remained closed longer than 5 seconds after the call for heat began Pressure switch wiring is incorrect Replace pressure switch Pressure switch remained open longer than 5 seconds after the combustion blower was energized Pressure switch wiring is incorrect Pressure switch tubing not connected correctly Air intake or exhaust obstructed Error in the hot surface igniter circuit Check that all wiring is correct and secure Replace hot surface igniter System in lockout Gas supply is off or too low to operate Hot surface igniter not positioned correctly Low voltage to the water heater Electric polarity to unit is incorrect test and correct h E Q 5 4 B lt q w m 4 w a E Problem in the gas valve driver circuit Turn powerto the water heater off for 10 seconds and the back on Replace gas control valve Problem with the internal circuit Turn powerto the water heater off for 10
5. are not satisfied This will usually correct the problem If after working with your dealer or service agent the problem has not been resolved to your satisfaction please let us know by either writing to us at A O Smith Water Products Company Service Department 106 Adkisson St Ashland City TN 37015 or going to our website at www aosmithwaterheaters com Please click on Mail then click on Service and leave us a message 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 include a daytime telephone number TROUBLE SHOOTING HELP THERMOSTAT AND GAS SUPPLY CHECK z Is gas being supplied to the thermostat Ves Yes Is thermostat calling for heat Run hot water from heater and set adjustment button higher Check using a manometer at thermostat pressure tap Call gas company to increase gas pressure GO TO TROUBLE SHOOTING SECTION PAGE 17 Yes Is there a minimum gas pressure 4 1kPa W C for natural gas or 10 2 5 kPa W C for propane L P gas A WARNING DO NOT BY PASS ANY CONTROLS TO MAKE HEATER OPERATE OPERATE ONLY AS WIRED FROM FACTORY 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
6. not interfere with the level of the T amp P valve Secure all insulation using tape FIGURE 27 FOR YOUR SAFETY READ BEFORE OPERATING A This appliance does not have a pilot A of life WARNING If you do not follow these instructions exactly a fire or explosion may result causing property damage personal injury or loss QD BEFORE OPERATING ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED FROMALL LINES It is equipped with an ignition device which automatically lights the burner Do NOT try to light the pilot by hand B BEFORE OPERATING smell all around the appliance area for gas Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor If you cannot reach your gas supplier call the fire department C Useonly your hand to push in the gas control buttons Never use tools If the control buttons will not push in don t try to repair them call a qualified service technician Force or attempted repair may result in WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electric switch do not use any phone in your building Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions a fire or explosion D Do not use this appliance if any part has been under water Immediately call a qualified service technician to inspect the appliance and to replace
7. of at least 2 inches 51mm greater than the diameter of the heater and should be piped to an adequate drain Drain pans suitable for these heaters are available from your dealer or A O Smith Water Products Company 5621 W 115th Street Alsip Illinois 60803 A WARNING DO NOT INSTALL THIS WATER HEATER DIRECTLY ON A CARPETED 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 76 2mm 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 DRAINING WATER CONNECTIONS Refer to Figure 1 for typical installation A suitable pipe thread sealant must be used to prevent leakage 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 Figure 2 for suggested piping arrangement SHUT OFF NON SCALD VALVE TEMPERING VA
8. or thermocouple which fails in normal use in accordance with the warranty terms and conditions specified below THE A O SMITH REPLACEMENT MODEL OR PART WILL BE WARRANTED FOR ONLY THE UNEXPIRED PORTION OF THE ORIGINAL WARRANTY The warranty period will be determined by the original installation date of the water heater PROOF OF PURCHASE AND PROOF OF INSTALLATION ARE NECESSARY TO VALIDATE THIS WARRANTY This warranty is not transferable and applies to models listed in Table 1 TABLE1 WARRANTY PERIOD MODELS TANK PARTS GPDH GPDT GPDX 6YEARS 6 YEARS When the water heater has been used for other than single family residential application 1 The tank warranty shall be reduced to 3 years for 10 year models and 1 year for 6 year models 2 The parts warranty shall be reduced to one year for all models Returned parts which meet any of the following conditions are not covered by this warranty 1 Improper installation or removal 2 damaged by other than normal wear 3 replaced for cosmetic purposes or 4 returned with defaced date codes CONDITIONS AND EXCEPTIONS This warranty shall apply only when the water heater is installed and operated in accordance with 1 all local fire codes and plumbing codes ordinances and regulations 2 the printed instructions provided with it 3 good industry practices and 4 proper safety practices such as but not limited to a properly sized drain pan if installed in an area where leakage f
9. re coat pipes 7 Push pipe completely into socket of fitting turning as it goes until it bottoms 8 Hold pipe and fitting together for 30 seconds Then carefully clean off excess with a cloth Allow connections a sufficient time to cure before disturbing 9 Remember that vent pipes must be adequately and securely supported APPROXIMATE SETTING TIME FOR 2 1 2 to 4 PIPE JOINTS MOVEMENT COMPLETE OF JOINT SET 90 32C TO 150F 66 C 3 4 hr 8 hrs 50F 10C TO90F ZO 1hr 15 hrs IF 42C TO 50 F qoc 1 1 3 hr 18 hrs VENT PIPE SEPARATION The inlet and outlet vent pipes must be separated by a minimum distance of 6 1 2 16 5 cm up to 24 61cm maximum 6 1 2 16 5 cm MIN 24 61 cm MAX FIGURE 18 CUTTING OPENINGS THROUGH AN OUTSIDE WALL AND COLLAR INSTALLATION After reading the manual and you have determined the location of the opening in the wall using the drawing below cut one 3 1 2 89 cm diameter hole for the inlet vent piping and one 3 1 2 89 cm diameter hole for the outlet vent piping through an exterior wall NOTE When determining locations of the openings in the outside wall allow for the 1 8 3 2 mm rise per 5 1 52 m that has taken place in the horizontal run Gor rue D MR RISE 8 2mm Bol PER FNE FEET 1 52 40 OAL etaL A om S0 GAL 1093 Lf 5 78 GAL 2849 L 63 tm FI
10. seconds and then back on Replace gas control valve Problem with the internal circuit Turn powerto the water heater off for 10 seconds and then back on Replace gas control valve Flame signal sensed out of proper sequence Replace gas control valve ECO activated Replace gas control valve One of the temperature adjust buttons stuck closed Press and release each of the buttons once Replace gas control valve Water temperature sensor is either open or short circuited Check that all wiring is correct and secure Replace gas control valve PROBLEM NOTENOUGH HOT WATER TROUBLE SHOOTING Continued 1 Blower will not run SOLUTION A ON OFF control switch turned off Turn switch to the ON position B Blower unplugged Plug blower back into 115 Vac outlet C No power at outlet Repair service to outlet D Thermostat defective Replace thermostat E Control harness defective Replace control harness F High limit control circuit open Replace ECO G Blower motor defective Replace Blower Assembly Thermostat problems A Thermostat set too low Set temperature control higher B Thermostat or ECO defective Replace thermostat_or ECO as required Others A Heater undersized Reduce hot water use B Low gas pressure Contact dealer C Incoming water
11. valve and 5 seconds later removes power from the blower a b Cycle is completed Pre purge 5 seconds HSI Warm up 20 seconds Ignition Activation Period 4 seconds Flame Recognition Period 1 second Ignition Trial 4 seconds Interpurge 5 seconds Post purae 5 seconds Retries 2 Reset from Lockout 1 hr Flame Sensing Nominal HSI Off Run Mode 4 0u DC HIGH ALTITUDE INSTALLATION A WARNING INSTALLATIONS ABOVE 2000 610 m FEET REQUIRE REPLACEMENT OF THE BURNER ORIFICE INACCORDANCE WITH THE NATIONAL FUEL GAS CODE ANSIZ223 1 NFPA 54 FAILURE TO REPLACE THE ORIFICE WILL RESULT IN IMPROPER AND INEFFICIENT OPERATION OFTHE APPLIANCE PRODUCING CARBON MONOXIDE GAS IN EXCESS OF SAFE LIMITS WHICH COULD RESULT IN EXCESS OF SAFE LIMITS WHICH COULD RESULT IN SERIOUS PERSONAL INJURY OR DEATH A O Smith builds models specifically for high altitude service Please check the rating plate before making changes VENTING MANUAL RESET SWITCH There is a venting manual reset switch located on the venting hood If the switch is activated it will not reset itself Before resetting this reset switch check for flue blockage and propriety of the venting systems To reset press the red button BLOWER MOTOR VENTING MANUAL RESET SWITCH VENTING HOOD FIGURE 29 FIGURE 30 AS wawrenance A WARNING DISCONNECT FROM ELECTRICAL SUPPLY BEFORE SERVICING UNIT FOR YO
12. A VENTS NUMBER OF 90 DEG MAX LENGTH FT ELBOWS 45 1372 m 1 40 12 2 m 2 35 10 7 m 3 NOTE Two 45 elbows are equivalent to one 90 elbow One 90 elbow equals 5 1 52 m of equivalent vent length 90 sTRI SCREEN 45050 VENT CAP Vent cap must SENT CAR BEPosmowep EACH VEN wawa sre BOWNWARD CLEARANCE SELF SEALING ROOF FLASHING MIN EVERY 3 172 107 em POSITION FIRESTOR S MAINTAIN LISTED CLEARANCE COMBUSTION AIR EXHAUST VERTICAL VENT p TAKE VERTICAL WATER HEATER n TOTAL VERTICAL AND HORIZONTAL RUNS SEE CHART ABOVE ITEM 8 FIGURE 23 WIRING A DANGER DO NOT USE AN EXTENSION CORD IF THERE IS NOTA SUITABLE RECEPTACLE AND OR LOCAL CODES PROHIBIT USE OFAPOWER CORD FIELD WIRING MUST BE PROVIDED THE APPLIANCE WHEN INSTALLED MUST BE ELECTRICALLY GROUNDED IN ACCORDANCE WITH LOCAL CODES OR IN THE ABSENCE OF LOCAL CODES WITH THE NATIONAL ELECTRICAL CODE ANSI NFPA 70 If local codes do not permit use of a flexible power supply cord OPTIONAL Field Installed Wiring Remove screws to remove wiring junction cover A standard 1 2 conduit opening has been made in the water heater junction box for the conduit connection Use wire nuts and connect the power supply wiring to the wires inside the water heater s junction box Be certain that neutral and line connections are not reversed when making these connections Replace f
13. AL VAPORS WHICH WILL BREAK DOWN INTO ACIDS AT HIGH TEMPERATURE SUCH CORROSION MAY RESULT IN FAILURE AND RISK OF ASPHYXIATION Spray can propellants cleaning solvents refrigerator and air conditioning refrigerants swimming 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 A WARNING HYDROGEN GAS CAN BE PRODUCED IN A HOT WATER SYSTEM SERVED BY THIS HEATER THAT HAS NOT BEEN USED FOR A LONG PERIOD OF TIME GENERALLY TWO WEEKS OR MORE HYDROGEN GAS IS EXTREMELY FLAMMABLE To reduce the risk of injury under these conditions itis 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 Insulatio
14. ANUAL GAS SHUTOFF VALVE TO THE APPLIANCE SEE FIGURE 1 G TEMPERATURE INDICATORS TEMPERATURE ADJUSTMENT BUTTONS Time to Produce 2nd amp 3rd Degree Temperature Setting urns on Adult Ski C Flashing approx 160 F 71 C OOOOO About 1 2 seconds C Approx 150 66 C OOOO O About 1 v2 seconds B Approx 140 F 60 C OOOO O Less than 5 seconds A Approx 130 F 54C OOO OO About 30 seconds W Approx 120 F 49 C OO O OO More than 5 minutes WARM Approx 80F 27 C OOOOO FIGURE 28 WATER HEATING IGNITION SEQUENCE Make sure gas and electric power are connected properly The ignition control module is powered and monitors the system waiting for a call for heat from the thermostat The thermostat calls for heat by reading a resistance value within a given range directly proportional to water temperature The control Module a Checks the pressure switch for an open circuit b Energizes the blower c Checks the pressure switch for a closed circuit to prove draft Sends line voltage to the hot surface igniter with a 20 second warm up period Opens the gas valve and checks the sensing rod for flame d e The burner heats the water to the desired thermostat setting The resistance in the thermostat rises to the value selected by the temperature setting The control module closes the gas
15. AY BE CONNECTED TO THE DRAIN VALVE TO CARRY THE WATER AWAY A DANGER The water CAN BE HOT The drain valve must be left open during the shutdown period To restart heater refer to the FILLING instructions under OPERATION Periodically open the drain valve and allow the water to run until it flows clean This will help prevent sediment build up in the tank It is normal for lime and scale deposits to form within the tank Such deposits will not be removed by periodic draining It is necessary to chemically delime the affected parts in water areas where such deposits are encountered 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 CATHODIC PROTECTION ANODE The anode rod is used to protect the tank from corrosion Most hot water tanks are equipped with an anode rod The sub merged 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 in operating condition Anode deter
16. E VENTING INSTRUCTIONS IN THIS MANUAL BEFORE COMPLETING THE INSTALLATIONAND PUTTING THE WATERHEATER INTO SERVICE A WARNING THESE MODELS ARE CERTIFIED FOR VERTICAL VENTING AND SIDE WALL VENTING THE UNIT CONSISTS OF AN INTAKE VENT TERMINAL AND AN EXHAUST VENT TERMINAL WHICH MUST BE USED TO TERMINATE THE VENTING ARRANGEMENT IF THE VENT TERMINALS SUPPLIED WITH THIS UNIT ARE NOT USED TO TERMINATE THE VENTING ARRANGEMENT THE RISK OF IMPROPER OPERATION FIRE EXPLOSION OR ASPHYXIATION WILL INCREASE The Power Direct Vent outlet terminal of over 50 000 BtuH input models shall terminate at least 12 30 5 cm below A 12 30 5 cm horizontally from or 12 30 5 cm above any door WARNING window or gravity air inlet into the building see Figure 4 WHEN DETERMINING THE INSTALLATION LOCATION FOR A POWER DIRECT VENT WATER HEATER SNOW 18 45 7 cm minimum from other natural draft gravity ACCUMULATION AND DRIFTING SHOULD BE CONSIDERED direct vent power vent or power direct vent appliance inlet IN AREAS WHERE APPLICABLE and or outlet vent s when directly above or 135 to either Venting Through an Outside Wall Clearances sie of centenine sea Fire s 0 clearance for 3 PVC ABS or CPVC Schedule 40 piping 24 61 cm minimum from any appliance inlet and or outlet from combustible surfaces vents when directly below or 45 to either side of center line see Figure 5 COMBUSTION AIR AND EXHAUST 18 45 7 cm mini
17. GAS WATER HEATER OWNER S MANUAL Thank you for buying this energy efficient water heater from A O Smith Water Products Company We appreciate your confidence in our products You should thoroughly read this manual before installation and or operation of this water heater Please pay particular attention to the important safety and operating instructions as well as the WARNINGS and CAUTIONS WARNING If the information in these instructions is not followed exactly a fire or explosion may result causing property damage personal injury or eath Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electrical switch do not use any phone in your building Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department Installation and service must be performed by a qualified installer service agency or the gas supplier GPDH GPDT GPDX GAS MODELS with Hot Surface Ignition GET TO KNOW YOUR WATER HEATER GENERAL SAFETY INFORMATION INSTALLATION LIGHTING AND OPERATING LABEL OPERATION MAINTENANCE AND TROUBLESHOOTING WARRANTY A CAUTION TEXT PRINTED OR OUTLINED IN RED CONTAINS INFORMATION RELATIVE TO
18. GH AN OUTSIDE WALL A ALL 75 GAL 283 9L 65 000 amp 70 000 BTU HR MODELS amp 50 GAL 1893L 60 000 amp 65 000 BTU HR MODELS SEE FIGURE 10 In the carton is supplied 1 Two 3 inlet and outlet PVC Schedule 40 45 vent caps 2 A3 ABS Schedule 40 90 street elbow used to connect the outlet vent pipe to the water heater when the outlet vent pipe is to be turned horizontally directly off the blower 3 A 5 1 52 m section of 3 ABS Schedule 40 outlet vent pipe more may be required and must be supplied locally ONE 3 SCHEDULE 40 37 ABS SCHEDULE 40 TO ae INLET 90 STREET OUTLET 5 1 52m SCHEDULE i ELBOW SUPPLIED 40 ABS OUTLET pipe SLBONY SUPPLIED SUPPLIED S REQUIRED 37 PVC SCHEDULE 40 90 STREET INLET ELBOW REQUIRED 40 PVC INLET PIPE N REQUIRED OWE 3 SCHEDULE 40 gari Leow aunt L FIGURE 10 HI BTU MODELS The water heater requires its own separate venting system Y Only 3 ABS Schedule 40 piping amp fittings are acceptable materials on the first 5 of outlet vent system This applies to only 50 gal 1893 L Hi BTU input models and all 75 gal 283 9 L models e 3 PVC ABS or CPVC Schedule 40 piping amp fittings are acceptable materials for the inlet vent system and for the outlet vent system after the first 5 1 52 m It cannot be connected to existing vent piping or chimney a When venting through an outside wall the vents
19. GURE 19 The 3 PVC ABS or CPVC Schedule 40 vent pipe can be run from the water heater through the wall or from the wall to the water heater whichever is most convenient The vent pipe must extend a minimum of 1 1 2 38 mm through the exterior wall Extending the vent cap as far as possible from the surface of the exterior wall will help minimize discoloration of the wall Note that the inside flue mounting adaptors must be slipped over the vent piping before locating the pipe through the wall Before securing the inside and outside collars to the wall use a silicone sealer between pipe and opening to insure a water and air tight seal INSTALLATION SHOWING USE OF PVC ABS OR CPVC PIPE FOR INLET AND OUTLET VENT PIPE SILICONE j EALER pa si SUPPLIED 4 402 38 mm MIN EXTENSION THROUGH EXTERIOR WALL VENT CAP MUST BE POSITIONED j E DOWNWARD screw SCREW screw A screw SCREEN AT FLUE MOUNTING ADAPTOR OUTLET FLUE MOUNTING SILICONE SEALER ADAPTOR SUPPLIED FIGURE 20 CONNECTING VENT TO BLOWER 1 If making an immediate horizontal run of vent off the blower one 3 PVC inlet and one 3 PVC ABS for 50 Gal 189 3 L and 75 Gal 283 9 L Models outlet Schedule 40 street elbows are required Place the elbow in the required direction on the blower and using three sheet metal screws attach the elbow Dae T FIGURE 21 Ifthere is to be a
20. LVE 4 i SUGGESTED PIPING m p ARRANGEMENT FOR LA ipi COLD WATER INLET TOP CONNECTIONS TEMPERED POTABLE NON TEMPERED WATER WATER SUPPLY NON TEMPERED WATER RETURN FIGURE 2 CLOSED WATER SYSTEM A closed system will exist if a back flow preventer check valve pressure reducing valve or other similar device is installed in the cold water line between the water heater and the street main or well Excessive pressure may develop due to the thermal expansion of heated water causing premature tank failure or intermittent relief valve operation This type of failure is not covered by the limited warranty An expansion tank may be necessary in the cold water supply to alleviate this situation see Figure 1 Contact the local plumbing authority If the temperature and pressure relief valve on the appliance discharges periodically this may be due to thermal expansion in a closed water supply system Contact the water supplier or local plumbing inspector on how to correct the situation Do not plug the temperature and pressure relief valve GAS CONNECTIONS The minimum gas supply pressure for input adjustment is 50 WC 1 25 kPa for natural gas 11 0 W C 2 74 kPa for propane THE HEATER IS NOT INTENDED FOR OPERATIONAT HIGHER THAN 10 5 2 6 kPa FOR NATURAL amp 13 0 3 24 kPa FOR PROPANE WATER COLUMN SUPPLY PRESSURE EXPOSURE TO HIGHER GAS SUPPLY PRESSURE MAY CAUSE DAMAGE TO THE CONTROL WHICH COULD RE
21. RS VARIES WITH THE PERSON S AGE AND THE TIME OF THE EXPOSURE 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 AREA IS NOT AVAILABLE A COVER SHOULD BE INSTALLED OVER THE THERMOSTAT TO PREVENT TAMPERING 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 be set for the lowest temperature which satisfies your hot water needs This will also provide the most energy efficient operation of the water heater The water temperature setting was factory set at the lowest temperature Pressing the COOLER button decreases temperature and pressing the HOTTER button increases the temperature SETTING THE WATER HEATER TEMPERATUREAT 120 49 C APPROX v MARK ON TEMPERATURE SETTING OF GAS VALVE WILL REDUCE THE RISK OF SCALDS Some states require settings at specific lower temperatures Figure 28 shows the approximate water temperatures produced at various thermostat dial 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 30 F 1 C I
22. SULT IN FIRE OR 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 CONTROL FOULING FROM CONTAMINANTS IN THE GAS WAYS SUCH FOULING MAY CAUSE IMPROPER OPERATION FIRE OR EXPLOSION All piping must comply with local codes and ordinances or with the National Fuel Gas Code ANSI 2223 1 NFPA 54 whichever applies Copper and brass tubing and fittings except tin lined copper tubing shall not be used REFER TO FIGURE 1 FOR CONNECTION DETAILS BEFORE ATTACHING THE GAS LINE BE SURE THAT ALL GAS PIPE IS CLEAN ON THE INSIDE TO TRAPANY DIRT OR FOREIGN MATERIAL INTHE GAS SUPPLY LINE A DIRT LEG SOMETIMES CALLED DRIP LEG MUST BE INCORPORATED IN THE PIPING SEE FIGURE 1 The dirt leg must be readily accessible Install in accordance with recommendations of serving gas supplier Refer to the current edition of ANSI 2223 1 To prevent damage care must be taken not to apply too much torque when attaching gas supply pipe to gas valve inlet The valve inlet has a hexagon shape for use with a backup wrench Apply joint compounds pipe dope sparingly and only to the male threads
23. TER SYSTEM CHECK VALVE NARKED WITH DIRECTION OF FLOW ARROW DIRECTION OF FLOW X r ueenarunE ADJUSTMENT BUTTONS HOT OUTLET RECIRCULATING Loop TYPICAL NATURAL GAS PILOT CONSE por amp MAIN BURNER INSTALLED SURFACE WITHIN 360 RADIUS 4 DISCHARGE PIPE DO NOT CAP OR PLUG PROVIDE A 6 152mm AIR GAP BETWEEN THE END OF THE DISCHAGE PIPE AND DRAIN HEAT TRAP OFFLOW ce HOT SURFACE IGNITION ASSEMBLY COLD RETURN RECIRCULATING LOOP CONNECTION MUST BE INSTALLED ONLY IN THE UPRIGHT POSITION CERTAIN MODELS ARE EQUIPPED WITH SIDE PLUMBING CONNECTIONS FOR SPACE HEATING HOT AND COLD FITTING ASSEMBLIES PART NO 900126 2 P CAUTION 115VAC IN CONTROL HARNESS AND INSIDE JACKET GAS MODEL GPDH GPDT GPDX WITH HOT SURFACE IGNITION FIGURE 1 Ase GENERAL SAFETY INFORMATION EXTERNAL DAMAGE Do not operate the water heater until it has been fully checked out by a qualified technician if the water heater Has been exposed to fire or damage Displays evidence of sooting Produces steam or unusually hot water If the water heater has been flooded it must be replaced CHEMICAL VAPOR CORROSION A WARNING CORROSION OF THE FLUEWAYS AND VENT SYSTEM MAY OCCUR IF AIR FOR COMBUSTION CONTAINS CERTAIN CHEMIC
24. UIPMENT WIRE FENCE When the water heater outlet terminal is low enough to be touched accidentally or is accessible to small children a wire mesh chain link fence as show in Figure 7 may be used Care should be taken to maintain adequate ventilation around the outlet terminal If a chain link fence is installed it must not be used as a storage area for items that may block proper ventilation m m ie sei FIGURE 7 Venting Through Roof Clearances 0 clearance for 3 PVC ABS or CPVC Schedule 40 piping from combustible and noncombustible surfaces The vent exhaust outlet and air inlet terminals shall terminate at least 18 inches 45 7 cm above the roof surface see Figure 8 The venting system must be installed in a manner which allows inspection of the installation of the venting pipes and joints as well as periodic inspection after installation as required by ANSI Standards 45 VENT CAP WISCREEN 90 STREET ELBOW X FIGURE8 AIR FOR VENTILATION FOR APPLIANCES LOCATED IN CONFINED SPACES Air for ventilation should be provided if installed in a confined space Refer to the National Fuel Gas Code ANSI Z223 1 e 12 107 cm A li u STRAPPING FIGURE9 Horizontal runs must be securely supported at 3 1 2 foot 8 9 cm intervals and vertical runs supported at 5 foot 1 5 cm intervals VENTING THROU
25. UR SAFETY WATER HEATER SERVICE SHOULD BE PERFORMED ONLY BY AQUALIFIED SERVICE TECHNICIAN READ THE GENERAL SAFETY INFORMATION SECTION FIRST USERS OF THIS APPLIANCE SHOULD BE AWARE THAT GAS COMPONENTS WEAR OUT OVER A PERIOD OF TIME THE GAS CARRYING COMPONENTS OF THIS APPLIANCE SHOULD BE INSPECTED FOR PROPER OPERATION PERIODICALLY BY AQUALIFIED SERVICE TECHNICIAN MAIN BURNER Check main burner every 12 months for proper flame characteristics This is done by removing door s on heater see Figure 1 The main burner should provide complete combustion of gas ignite rapidly give reasonably quiet operation cause no excessive flame lifting from burner ports Make sure that the flow of combustion and ventilation air is not blocked If proper flame characteristics are not evident check for accumulation of lint or other foreign material that restricts or blocks the air openings in the heater or burner Also check AIR REQUIREMENTS A 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 turn the blower switch to OFF position and allow the burner to cool Remove the burner and clean with a soft brush Clean main burner orifice with a suitable soft material HIGH TEMPERATURE LIMIT SWITCH Single Use Type Energy Cut Off The thermostat has a built in limit switch which will actuate in case of e
26. YOUR SAFETY PLEASE READ THOROUGHLY BEFORE INSTALLING AND USING THIS APPLIANCE ADIVISION OF A O SMITH CORPORATION www aosmithwaterheaters com KEEP THIS MANUALIN THE POCKET ON HEATER FOR FUTURE REFERENCE WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED PRINTED IN U S A 0805 PART NO 184707 001 GET TO KNOW YOUR WATER HEATER A VENTPIPE EXHAUST L UNION REPLACEMENT PARTS AND DELIMING PRODUCTS B ANODE M INLETWATERSHUT C HOTWATEROUTLET OFF VALVE Replacement parts and recommended delimer may be OUTLET 115V AC N COLDWATERINLET ordered through authorized servicers or distributors Refer o FLUEBAFFLE O INLETDIPTUBE the Yellow Pages for where to call or contact the A O Smith F GASSUPPLY P TEMPERATUREAND Water Products Company 125 Southeast Parkway Franklin G MAIN MANUAL GAS PRESSURE RELIEF VALVE TN 37068 1 800 433 2545 When ordering parts provide SHUTOFF VALVE Q RATING PLATE complete model and serial numbers see rating plate quantity H GROUNDJOINT UNION R INSULATION and name or part desired as listed in Figure 1 Standard J DIRTLEG AE SE hardware items may be purchased locally K OUTERDOOR U HSIASSEMBLY V RUE W DRAIN PAN s MACUNM RELIEF X GAS VALVE Y CONTROL HARNESS S LOCAL CODES Z INTAKEAIRPIPE AA VENT TERMINAL INTAKE BB INNER DOOR CC BURNER ASSEMBLY TEMPERATURE INDICATORS INSTALL THERMAL EXPANSION TANK OR DEVICE IF WATER HEATER IS INSTALLED IN A CLOSED WA
27. e former is available from the Canadian Standards Association 8501 East Pleasant Valley Road Cleveland OH 44131 and both documents are available from the National Fire Protection Association 1 Batterymarch Park Quincy MA 02269 The appliance when installed must be electrically grounded in accordance with local codes or in the absence of local codes with the current edition of the National Electrical Code ANSI NFPA 70 LOCATION OF HEATER The heater is design certified by the Canadian Standards Association for installation with the following minimum clearances between the water heater and combustible and non combustible construction are 0 inches from side 0 inches from back 6 inches 152 mm from front of jacket to closet door and 12 inches 30 5 cm from top of jacket to combustible and non combustible material Minimum vent clearance 0 inches Provide 24 inches 61 cm front clearance for servicing and adequate clearance between the jacket top and ceiling for servicing the flue area Also see clearance for venting on pages 6 amp 7 A WARNING FAILURE TO HAVE REQUIRED CLEARANCES BETWEEN WATER HEATER AND COMBUSTIBLE MATERIAL WILL RESULT IN A FIRE HAZARD Adequate clearance for servicing this appliance should be considered before installation such as changing the anodes etc A DANGER FLAMMABLE Flammable Vapors dh vapors from flammable liquids may explode and catch fire causing death orsevere burns Wat
28. efer to CONDENSATION section LEAKING T amp P Thermal expansion in closed water system Install thermal expansion tank DO NOT plug T amp P valve Improperly seated valve Check relief valve for proper operation DO NOT plug T amp P valve Referto CATHODIC High sulfate or mineral content in water supply Drain and flush heater thoroughly then refill PROTECTION WATER TOO HOT Bacteria in water supply Thermostat set too high Chiorinate water supply Refer to TEMPERATURE REGULATION WATER HEATER SOUNDS SIZZLING RUMBLING Condensation dripping on burner Refer to CONDENSATION above Sediment at bottom of heater tank Clean sediment from tank Refer to DRAINING instruction in Maintenance section of manual SOOTING Improper combustion Refer to COMBUSTION AIR AND EXHAUST on page 6 HEATER LIGHTS BUT GOES OUT IN 4 5 SECONDS Outlet polarity is reversed 18 Test polarity and correct LIMITED RESIDENTIAL GAS WARRANTY THIS WARRANTY IS APPLICABLE TO THE ORIGINAL OWNER ONLY If the glass lined tank in this water heater shall prove upon examination by A O Smith Corporation the warrantor to have leaked during the warranty period in normal residential use due to natural corrosion from potable water therein the warrantor will furnish the ORIGINAL OWNER a replacement A O Smith water heater of equivalent size and current model or a replacement thermostat
29. er heater has a main burner and hot surface igniter The hot surface igniter 1 can come on at any time and 2 will ignite flammable vapors Do not use or store flammable products such as gasoline solvents or adhesives in the same room or area near the 4 water heater 2 3 Vapors cannot be seen are heavier than air go along way on the floor and 4 can be carried from other rooms to the pilot flame by air currents Keep flammable products faraway from heater in approved containers tightly closed and outof children s reach Installation Do not install water heater where flammable products will be stored or used unless the main burner and pilot flames are atleast 18 above the floor This will reduce but not eliminate the risk of vapors being ignited by the main burner or pilot flame When installing the heater consideration must be given to proper location Location selected should be as close to the wall as practicable and as centralized with the water piping system as possible A CAUTION In cold climates provide protection against freeze up THE HEATER SHOULD BE LOCATED IN AN AREA WHERE LEAKAGE OF THE TANK OR CONNECTIONS WILL NOT RESULT IN DAMAGE TO THE AREA ADJACENT TO THE HEATER OR TO LOWER FLOORS OF THE STRUCTURE When such locations cannot be avoided a suitable drain pan should be installed under the heater see Figure 1 The pan should have a minimum length and width
30. f you experience this type of use you should consider using lower temperature settings to reduce scald hazards Valves for reducing the point of use temperature by mixing cold and hot water are available see Figure 2 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 COOLER and HOTTER temperature adjustment buttons at the same time for one second see Figure 28 One or two of the temperature indicators will ight 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 the desired setting is reached B 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 M
31. ioration 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 rod must remain installed except for inspection to avoid shortening tank life See LIMITED WARRANTY Replace as necessary SERVICE AND REPAIR The A O Smith 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 If you are having a problem with your A O Smith water heater and are not pleased with the service you received First please contact your dealer or the A O Smith authorized service agent in your area and explain to them why you
32. is unusually cold Allow more time for heater to reheat D Leaking hot water pipes or fixtures Have plumber check and repair leaks VENT PIPE TOO HOT ABOVE 170F A Defective air flow restrictor Take unit out of service immediately call an A O Smith service representative B Not enough dilution air to mix with flue gases in inlet tee Proper dilution air must be provided for combustion and dilution of flue temp Refer to INSTALLATION section C Dilution air too hot for mixing with flue gases Supply air is too hot Check for heat sources around intake terminal and blockage of dilution air leg D Wrong burner orifice Install correct orifice YELLOW FLAME A Dirt in burner ports Turn off heater and gas clean burner head B Combustion air path restricted Check intake venting arrangements for obstructions C Not enough dilution air for proper combustion Check Intake venting arrangement for obstructions CONDENSATION A Water on the floor under heater See CONDENSATION section B Water dripping from pan Provide drip TEE to catch condensation see Figure 1 WATER LEAKS Improperly sealed hot or cold supply connections relief valve drain valve or thermostat threads Tighten threaded connections Leakage from other appliances or water lines Inspect other appliances near water heater Condensation of flue products R
33. mum in all directions from any obstruction such as a wall that may interfere VERSES elem E 12 30 5 cm minimum from the ground and corners 9 23 cm ceiling overhang see Figure 3 x e 3 O Q 3 23 cm MIN FROM ANY OVERHANG y amp orruuE 24 Bion NATURAL DRAFT GRAVITY DIRECT VENT POWER VENT OR POWER DIRECT VENT APPLIANCE INLET ANDIOR OUTLET VENT S 12 30 5 n MN FIGURE 5 The location selection must provide clearances for servicing and proper operation of the water see Figure 6 UR MUST MAINTAIN ADEQUATE SERVICE AND MAINTENANCE FIGURE 3 ACCESSIBILITY The Power Direct Vent outlet terminal shall terminate at AVAILABLE FOR VENT least 36 91 cm above any forced air inlet located within boc PIPE INSTALLATION 10 feet 305 cm see Figure 4 FIGURE 6 The Power Direct Vent outlet terminal of 50 000 BtuH input The venting system must be installed in a manner which models or less shall terminate at least 9 23 cm below allows inspection of the instalation of the venting pipes 23 cm horizontally from or 9 23 cm above any door and joints as well as periodic inspection after installation window or gravity air inlet into the building see Figure 4 as required by the National Fuel Gas Code ANSI 2223 1 Mininum 9 in 23 em for appliances with sone eee 10 000 buh
34. must terminate horizontally to the outdoors B ALL50 GAL 189 3 L 38 000 AND 40 000 BTU HR MODELS amp 40 GAL 151 4L 36000 amp 40000 BTU HR MODELS SEE FIGURE 11 In the carton is supplied 1 Two 3 inlet and outlet PVC Schedule 40 45 vent caps All other piping must be supplied by the supplier ONE 3 SCHEDULE 40 PVC 46 INLET ELBOW REQUIRED TWO 3 PVC SCHEDULE 40 90 STREET ELBOW REQUIRED SCHEDULE 0 PVC INLET AND NS OUTLET E UTET PIPE ONE 3 SCHEDULE 40 Fic 45 OUTLET ELBOW REQUIRED il FIGURE 11 STANDARD MODELS If making an immediate horizontal run of vent off the blower two 3 PVC or ABS Schedule 40 street elbows are required 1 The water heater requires its own separate venting system 2 8 PVC ABS or CPVC Schedule 40 piping and fittings are acceptable materials for the vent system 8 It cannot be connected to existing vent piping or chimney 4 When venting through an outside wall the vents must terminate horizontally to the outdoors VENTING SYSTEM EXAMPLE INSTALLATION FOR ALL MODELS The vent piping cannot under any circumstances be run downhill 3 ELBOW EXAMPLE MIN RISE 118 3 2 mm PERS 1 52 m FIGURE 14 ELBOW il EXAMPLE T MIN RISE 418 3 2 mm PERS 1 52 m CAULK JOINT o MIN RISE 1 8 3 2 mm PERS 1 52 m
35. n blankets available to the general public for external use on gas water heaters are not necessary with A O Smith products The purpose of an insulation blanket is to reduce the standby heat loss encountered with storage tank water heaters Your A O Smith water heater meets or exceeds the National Appliance Energy Conservation Act standards with respect to insulation and standby loss requirements making an insulation blanket unnecessary A wann Should you choose to apply an insulation blanket to this heater you should follow these instructions see Figure 1 for identification of components mentioned below Failure to follow these instructions can restrict the air flow required for proper combustion potentially resulting in fire asphyxiation serious personal injury or death Do not cover the outer door thermostat or temperature amp pressure relief valve Do not cover the instruction manual Keep it on the side of the water heater or nearby for future reference Do obtain new warning and instruction labels from A O Smith for placement on the blanket directly over the existing labels LIQUID PETROLEUM MODELS A WARNING Water heaters for propane or liquefied petroleum gas LPG are different from natural gas models A natural gas heater will not function safely on LP gas and no attempt should be made to convert a heater from natural gas to LP gas LP gas must be used with great caution It is highly explosive and hea
36. nician or gas supplier WARNING TURN OFF ALL ELE POWER BEFORE SERVICING TO TURN OFF GAS TO APPLIANCE 1 Set thermostat to the lowest setting by first pressing the COOLER amp and HOTTER buttons together and holding for 1 second Then press the COOLER button a until the WARM 3 indicator light appears 2 OFF position is to be performed 12 Set the ON OFF switch on the control box to the Tum off all electric power to the appliance if service Ay OPERATION 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 DO NOT ATTEMPT TO OPERATE HEATER WITH COLD WATER INLET VALVE CLOSED FILLING Close the heater drain valve by turning handle clockwise Figure 1 Open nearby hot water faucet to permit the air in the system to escape Fully open the cold water inlet pipe valve allowing the heater and piping to be filled see Figure 1 Close the hot water faucet as water starts to flow The heater is ready to be operated TEMPERATURE REGULATION LES 4 DANGER A DANGER THIS WATER HEATER IS EQUIPPED WITH AN ADJUSTABLE THERMOSTAT TO CONTROL WATER TEMPERATURE HOT WATER TEMPERATURES REQUIRED FOR AUTOMATIC DISHWASHER AND LAUNDRY USE CAN CAUSE PAINFUL SCALDING WITH POSSIBLE SERIOUS AND PERMANENT INJURY THE TEMPERATURE AT WHICH INJURY OCCU
37. of pipe joints Do not apply compound to the first two threads Use compounds resistant to the action of liquefied petroleum gases Do not use teflon tape on gas valve DISCONNECT THE APPLIANCE AND ITS INDIVIDUAL SHUT OFF VALVE FROM THE GAS SUPPLY PIPING SYSTEM DURING ANY SUPPLY PRESSURE TESTING EXCEEDING 1 2 PSI 3 5 kPa GAS SUPPLY LINE MUST BE CAPPED WHEN DISCONNECTED FROM THE HEATER FOR TEST PRESSURES AT 1 2 PSI 3 5 kPa OR LESS THE APPLIANCE NEED NOT BE DISCONNECTED BUT MUST BE ISOLATED FROM THE SUPPLY PRESSURE TEST BY CLOSING THE MAIN MANUAL GAS VALVE BEFORE PLACING THE HEATER IN OPERATION CHECK FOR GAS LEAKAGE USE SOAP AND WATER SOLUTION OR OTHER MATERIALACCEPTABLE FOR THIS PURPOSE DO NOT USE MATCHES CANDLES FLAME OR OTHER SOURCES OF IGNITION TO LOCATE GAS LEAKS RELIEF VALVE P See FIGURE 1 A NEW TEMPERATURE AND PRESSURE RELIEF VALVE COMPLYING WITH THE STANDARD FOR RELIEF VALVES AND AUTOMATIC GAS SHUT OFF DEVICES FOR HOT WATER SUPPLY SYSTEMS ANSI Z21 22 CURRENT EDITION MUST BE INSTALLED IN THE HEATER IN THE MARKED OPENING PROVIDED THE VALVE MUST BE OF A SIZE INPUT RATING THAT WILL BE ADEQUATE FOR YOUR SIZE HEATER Check the metal tag on the relief valve and compare it to the heater s rating plate The pressure rating of the relief valve must not exceed the working pressure shown on the rating plate of the heater In addition the hourly Btu rated temperature steam discharge capacity of the relief valve shall no
38. rom connections of the tank would result in damage to the area adjacent to the heater In addition a new temperature and pressure relief valve certified by the American Gas Association must have been properly installed and piped to the nearest drain This warranty shall apply only when the heater is owned by the original purchaser used at temperatures not exceeding the maximum calibrated setting of its thermostat not subjected to excessive water pressure fluctuations and not subject to an operating pressure greater than 150 P S L filled with potable water free to circulate at all times and with the tank free of damaging water sediment or scale deposits used in a non corrosive and non contaminated atmosphere used with factory approved anode s installed in its original installation location in the United States its territories or possessions and Canada sized in accordance with proper sizing techniques for residential water heaters bearing a rating plate which has not been altered defaced or removed except as required by the warrantor not used in a closed system without a properly sized and installed thermal expansion tank fired at the factory rated input using the fuel stated on the face of the rating plate operated with the inner and outer combustion chamber doors in place maintained in accordance with the instructions printed in the manual included with the heater Any accident to the water heater or any part
39. ront plate and secure with screws A 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 105 C AND A MINIMUM SIZE OF NO 18 AWG BLOWER GaLcirewat TERMINALS WIRE NUTS CONDUIT FIGURE 24 SCHEMATIC DIAGRAMS m Eco lg switch u L2 oni oworr m SWITCH THERMOSTAT SWITCH BLOWER VACUUM SWITCH EXHAUST BLOCKAGE p GAS VALVE BLOWER E motor m WATER HEATER CONTROL an IGNITER 5 a_l FLAME SENSOR ROD NORMAL OPERATION SEQUENCE INDICATED BY BOXED NUMERALS FIGURE 25 i Y Y ware nur NEUTRAL WHITE ver LowisLack et See Nee pee UIS OVIUM alNor OSN3S SWYT4 FIGURE 26 T amp P VALVE AND PIPE INSULATION ON SELECTED MODELS Remove insulation for T amp P valve and pipe connections from carton Fit pipe insulation over the incoming cold water line and the hot water line Make sure that the insulation is against the top cover of the heater INSULATED INLET INSULATED i OUTLET Fit T amp P valve insulation over valve Make sure that the insulation does
40. rs are harmful They may irritate eyes and skin and can be absorbed through the skin A precautions Always store primers cleaner and cements in cool dry well ventilated places Do not store these near heat sparks or flames Keep container closed Use them in well ventilated areas Wear impervious clothing while handling Do not smoke eat or drink while handling Wash thoroughly after handling and before eating Wear eye protection when handling If swallowed drink water do not induce vomiting and call a physician or poison control center immediately If inhaled get fresh air and seek medical attention if ill feelings persist In case of eye and skin contact immediately flush with plenty of water for 15 minutes and seek medical attention if irritation persists KEEP OUT OF REACH OF CHILDREN All primers cleaners and cements must meet all local codes and applicable standard of the American Society For Testing Materials Standards Before using primers cleaners and cements stir or shake making sure contents are liquid Do not use if found to be lumpy or jelly like 1 Cut pipe ends squarely removing all burrs and dirt Dry fit pipe and fittings to be connected for proper fit Clean pipe and fitting with a primer cleaner Apply a thin coat of cement to fitting avoiding puddling inside Apply a liberal coat of cement to pipe leaving no voids o7 wD QUICKLY assemble parts while cement is fluid If you wait too long
41. t be less than the input rating of the heater NO VALVE IS TO BE PLACED BETWEEN THE RELIEF VALVE AND TANK DO NOT PLUG THE RELIEF VALVE The drain line connected to this valve must not contain a reducing coupling or other restriction and must terminate near a suitable drain to prevent water damage during valve operation The discharge line shall be installed in a manner to allow complete drainage of both the valve and line DO NOT THREAD PLUG OR CAP THE END OF THE DRAIN LINE VENTING A WARNING NEVER OPERATE THE HEATER UNLESS THE INTAKE AND EXHAUSTARE VENTED TO THE OUTDOORS AND HASADEQUATE AIR SUPPLY TO AVOID RISKS OF IMPROPER OPERATION FIRE EXPLOSION ORASPHYXIATION IF THE WATER HEATER IS BEING INSTALLED AS A REPLACEMENT FOR AN EXISTING POWER VENTED HEATER IN PRE EXISTING VENTING A THOROUGH INSPECTION OF THE EXISTING VENTING SYSTEM MUST BE PERFORMED PRIOR TO ANY INSTALLATION WORK VERIFY THAT THE CORRECT MATERIALAS DETAILED ABOVE HAS BEEN USED AND THAT THE MINIMUM OR MAXIMUM VENT LENGTHS AND TERMINALLOCATIONAS DETAILED IN THIS MANUAL HAVE BEEN MET CAREFULLY INSPECT THE ENTIRE VENTING SYSTEM FOR ANY SIGNS OF CRACKS OR FRACTURES PARTICULARLY AT THE JOINTS BETWEEN ELBOWS AND OTHER FITTINGS AND THE STRAIGHT RUNS OF VENT PIPE CHECK THE SYSTEM FOR SIGNS OF SAGGING OR OTHER STRESSES IN THE JOINTSAS ARESULT OFMISALIGNMENT OF ANY COMPONENTS IN THE SYSTEM IFANY OF THESE CONDITIONS ARE FOUND THEY MUST BE CORRECTED IN ACCORDANCE WITH TH
42. thereof including freezing fire floods or lightning any misuse abuse or alteration of it any operation of it in a modified form or any attempt to repair tank leaks or parts will void this warranty SERVICE AND LABOR RESPONSIBILITY UNDER THIS 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 19 Labor charges for service removal or reinstallation of the water heater or part thereof Shipping and delivery charges for forwarding the new water heater or replacement part from the nearest distributor and returning the claimed defective heater or part to such distributor except in the state of California where such charges are the manufacturer s responsibilty All cost necessary or incidental for handling and administrative charges and for any materials and or permits required for installation of the replacement heater or part LIMITATION ON IMPLIED WARRANTIES Implied warranties including any warranty of merchantability imposed on the sale of this heater under state law are limited to one year duration for the heater or any of its parts Some states do not allow limitations on how long an implied warranty lasts so the above limitations may not apply to you CLAIM PROCEDURE Any claim under this warranty should be initiated with the dealer who sold the heater or with any other dealer handling the
43. vertical run from the blower the 3 PVC inlet and the 3 PVC ABS for 50 Gal 189 3 L and 75 Gal 283 9 L Models outlet Schedule 40 pipe must be attached to the blower and venting hood using six sheet metal screws CAULK JOINTS FIGURE 22 VENTING THROUGH A ROOF Two 3 inlet and outlet PVC Schedule 40 45 vent caps are supplied A 5 1 52 m section of 3 ABS Schedule 40 outlet vent pipe 50 Gal 189 3 L Hi BTU input amp all 75 Gal 283 9 L Models only is supplied on certain models only More may be required and must be supplied locally 1 2 The water heater requires its own separate venting system Only 3 ABS Schedule 40 piping and fittings are acceptable materials on the first 5 1 52 m of the outlet vent system for some 50 Gal 189 3 L and 75 Gal 283 9 L models 3 PVC ABS or CPVC Schedule 40 piping and fittings are acceptable materials for the inlet vent system and for the outlet vent system after the first 5 1 52 m for 50 Gal 189 3 L Hi BTU input and 75 Gal 283 9 L Models only It cannot be connected to existing vent piping or chimney It must terminate vertically to the outdoors The total vertical and horizontal runs cannot exceed the maximum length with a maximum number of 90 elbows as specified in the table below If more elbows are required the venting distance must be reduced 5 1 52 m for every 90 elbow oos 3 DI
44. vier than air It collects first in the low areas making its odor difficult to detect at nose level If LP gas is present or even suspected do not attempt to find the cause yourself Go to a neighbor s house leaving your doors open to ventilate the house then call your gas supplier or service agent Keep area clear until a service call has been made At times you may not be able to smell an LP gas leak One cause is odor fade which is a loss of the chemical odorant that gives LP gas its distinctive smell Another cause can be your physical condition such as having a cold or a diminishing sense of smell with age For these reasons the use of a propane gas detector is recommended IF YOU EXPERIENCE AN OUT OF GAS SITUATION DO NOT TRY TO RELIGHT APPLIANCES YOURSELF Ask your LP delivery person to relight pilots for you Only trained LP professionals should conduct the required safety checks in accordance with industry standards Ay INSTALLATION 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 AND GAS SUPPLY ARE REQUIRED GENERAL 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 current editions of the National Fuel Gas Code ANSI Z223 1 NFPA 54 and the National Electrical Code NFPA 70 Th
45. warrantor s products If this is not practical the owner should contact A O Smith Water Products Company 125 Southeast Parkway Franklin TN 37068 800 323 2636 Canadian customers should contact A O Smith Enterprises Ltd P O Box 310 768 Erie Street Stratford Ontario N5A 673 519 271 5800 The warrantor will only honor replacement with identical or similar water heater or parts thereof which are manufactured or distributed by the warrantor Dealer replacements are made subject to in warranty validation by warrantor PROOF OF PURCHASE AND PROOF OF INSTALLATION DATES ARE REQUIRED TO SUPPORT WARRANTY FOR CLAIM FROM ORIGINAL OWNER THIS FORM DOES NOT CONSTITUTE PROOF OF PURCHASE OR PROOF OF INSTALLATION DISCLAIMERS NO 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 OR PARTS THE WARRANTOR SHALL NOT BE RESPONSIBLE FOR WATER DAMAGE LOSS OF USE OF THE UNIT INCONVENIENCE LOSS OR DAMAGE TO PERSONAL PROPERTY OR OTHER CONSEQUENTIAL DAMAGE THE WARRANTOR SHALL NOT BE LIABLE BY VIRTUE OF THIS WARRANTY OR OTHERWISE FOR DAMAGE TOANY PERSONS OR PROPERTY WHETHER DIRECT OR INDIRECT AND WHETHER ARISING IN CONTRACT OR IN TORT Some states do not allow the limitation or exclusion of incidental or consequential damages so the above limitation or exclusion may not apply to you This warranty gives
46. xcessive water temperatures The heater cannot be relit until the gas control valve is replaced It is important that a serviceman be called to determine the reason for limit operation and thus avoid repeated thermostat replacement Lower the temperature adjustment setting on new control VENTING SYSTEM HAVE VENTING SYSTEM CHECKED EVERY SIX MONTHS FOR OBSTRUCTIONS AND OR DETERIORATION IN VENT PIPING POWER VENTER MAINTENANCE The POWER venter must be inspected yearly 1 MOTOR Motor must rotate freely For safety and satisfactory operation it is recommended that the heater be checked once a year by a competent service person T amp PVALVE At least once a year the temperature and pressure relief valve must be checked to ensure that it is in operating condition Lift the lever at the top of the valve several times until the valve seats properly and operates freely A DANGER THE WATER PASSING OUT OF THE VALVE DURING THIS CHECKING OPERATION MAY BE EXTREMELY HOT AVOID CONTACT AND DISCHARGE SAFELY TO PREVENT WATER DAMAGE DRAINING If the heater is to be shut off and exposed to freezing temperatures it must be drained Water if left in the tank and allowed to freeze will damage the heater Turn off the gas and cold water inlet valve to the heater Open a nearby hot water faucet and the heater drain valve BE CAREFUL TO GRASP THE DRAIN VALVE HANDLE SO THAT THE HAND IS NOT EXPOSED TO HOT WATER IF DESIRED A HOSE M
47. you specific legal rights and you may also have other rights which vary from state to state Should governmental regulations or industry standards prohibit the Manufacturer from furnishing a comparable model replacement under this warranty the Owner will be furnished with the closest comparable water heater meeting the then current governmental regulations and industry standards A supplementary fee may be assessed to cover the additional cost associated with the changes made to meet applicable regulations and standards IMPORTANT INFORMATION Model Number Serial Number Installation Information Date Installed Company s Name Street or P O Box City State and Zip Code Phone Number Plumber s Name ProductPreservers 125 SOUTHEAST PARKWAY FRANKLIN TN 37068 Phone 1 800 433 2545 Fax 1 800 433 2515 www aosmithwaterheaters com email parts hotwater com
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