A.O. Smith DEL Owner's Manual
Contents
1. F 49 C FIGURE 3 TEMPERATURE ADJUSTMENT The water temperature is controlled by surface mounted thermostats with hi limit There is one mounted firmly against the tank directly above each element The thermostats of A 8 circuit are adjustable from approximately 120 F 49 C lowest setting to 180 F 82 C highest setting The thermostat of C 2 circuit is adjustable from approximately 110 F 43 C to 170 F 77 C with a factory set point 120 F 49 C The over temperature device hi limit attached to each thermostat has a manual reset L2 L4 30A 120 250 VAC 25A 277 VAC 42 58 480 VAC 30A 12 250 VAC 25A 277 VAC 12 58 480 VAC ADJUSTABLE UPPER ADJUSTABLE THERMOSTAT BEHIND LOWER SINGLE JUNCTION BOX DOOR THERMOSTAT FIGURE 4 NOTE It is not necessary to adjust the upper thermostat for a dual element unit However if it is adjusted above the factory set point 140 F 60 C it is recommended that it not be set higher than the lower thermostat setting To change the temperature setting A DANGER 1 Turn off the heater electrical supply Do not attempt to adjust thermostat with power on 2 Open the junction box door for upper thermostat of dual element water heater only and or remove the lower thermostat access panel Do not remove the plastic personel protectors covering the thermostats The thermostat is factory pre set at 140 F 60 C for dual element units or at 1202. F 49 C for single element units 3 Using a flat tip screwdriver rotate the adjusting knob to the desired temperature setting 4 Replace the covers and access panels and turn on heater electrical supply Valves for reducing point of use temperature by mixing cold and hot water are available See Figure 5 Also available are inexpensive devices that attach to faucets to limit hot water temperatures Contact a licensed plumber or the local plumbing authority A non adjustable high temperature limit control operates before steam temperatures are reached The high limit is in the same area as the upper thermostat and must be reset manually when it operates BECAUSE THE HIGH LIMIT OPERATES ONLY WHEN ABNORMALLY HIGH WATER TEMPERATURES ARE PRESENT IT IS IMPORTANT THAT A QUALIFIED SERVICE AGENT BE CONTACTED TO DETERMINE THE REASON FOR OPERATION BEFORE RESETTING SHUT OFF NON SCALD VALVE TEMPERING VALVE SUGGESTED PIPING ARRANGEMENT FOR TOP CONNECTIONS COLD WATER INLET TEMPERED POTABLE NON TEMPERED WATER WATER SUPPLY NON TEMPERED WATER RETURN FIGURE5 DRAINING If the heater is to be shut down and exposed to freezing temperatures it must be drained Water if left in the tank and allowed to freeze will expand and damage the heater 1 Turn off the electrical switch and cold water inlet valve If desired a hose may be connected to the drain valve to carry the water away
3. Ambient Temperature of 30 C 86 F These ampacities relate only to conductors described in Table 310 13 in Code For ambient temperatures over 30 C 86 F see Correction Factors Note 13 in Code See Table 310 13 in Code 60 C 75 C 140 F 167 TYPES RH RHW RUH 14 2 THW THWN XHHW Portion of Table 310 18 follows Allowable Ampacities of Insulated Aluminum and Copper Clad Aluminum Conductors Not more than three conductors in Raceway or Cable or Direct Burial Based on Ambient Temperature of 30 C 86 F These ampacities relate only to conductors described in Table 310 13 in Code For ambient temperatures over 30 C 86 F see Correction Factors Note 13 in Code Temperature Rating of Conductor See Table 310 13 in Code 60 C F 75 C 140 F 167 TYPES RH RHW RUH 12 2 THW THWN XHHW WIRING DIAGRAMS C 2 CIRCUIT FOR SINGLE ELEMENT HEATERS 1 PHASE POWER IN OFF PEAK 13 SIMULTANEOUS 1115 COMMONLEG FOR SIMULTANEOUS OPERATION EQUIPPED WITH HIGH 0 dS PASE 0 LIMIT CONTROL e WITH OFF PEAK CLOCK SWITCH JUNCTION THREE PHASE NON SIMULTANEOUS YELLOW HIGH LIMIT SINGLE PHASE SIMULTANEOUS ELEMENT DOUBLE THROW THERMOSTAT FACTORY WIRED FIELD WIRING T WHI
4. WORKING VOLTS AC PHASE UPPER LOWER CIRCUIT USGALS PRESSURE SINGLE ELEMENT RATING PLATE ELECTRIC STORAGE TANK WATER HEATER USTED MODEL NUMBER SERIAL NUMBER ITEM ID PART NUMBER WATTS WATTS TOTALWATTS CAPACITY MAX WORKING VOLTS AC PHASE UPPER LOWER CONNECTED USGALS PRESSURE CITY OF NEW YORK DEPT TOTAL WATTS CONNECTED ny OF BUILDING MEA INTERLOCK SIMULTANEOUS CITY OF NEW YORK DEPT OF BUILDING MEA CIRCUIT DO NOT OPERATE THE HEATER WITHOUT INSTALLING AN APPROVED TEMPERATURE AND PRESSURE RELIEF VALVE IN THE OPENING PROVIDED IN THE TANK GROUND THE HEATER TO GUARD AGAINST ELECTRIC SHOCK FROM THE HEATER OR WATER SYSTEM NEVER OPERATE THE HEATER WITHOUT FILLING WITH WATER PER THE FILLING INSTRUCTIONS FAILURE TO DO SO WILL DAMAGE INTERNAL PARTS FILLING 1 Close the water heater drain valve by turning hand wheel to right clockwise 2 Open a nearby hot water faucet to permit the air in the system to escape 3 Fully open the cold water inlet valve allowing the heater and piping to be filled 4 Close the hot water faucet as water starts to flow 5 Turn on the electrical switch to the water heater WARNING DO NOT ATTEMPT TO OPERATE HEATER WITH COLD WATER INLET VALVE CLOSED TEMPERATURE REGULATION DANGER A DANGER THE WATER HEATER IS EQUIPPED WITH AN ADJUSTABLE THERMOSTAT TO CONTROL WATER TEMPERATURE HOT WATER AT TEMPERATURES DESIRED FOR AUTOMATIC D
5. heater electrical switch is turned to the ON position In some areas additional special meter controlled by a timer is used to govern the periods electricity is available If the heater operates on a timed electrical circuit recovery will be limited to certain hours 2 Check for loose or blown fuses in the water heater circuit 3 If the water has been excessively hot and is now cold the high temperature limit control may have operated To restore service contact your dealer or utility company Refer to TEMPERATURE REGULATION section The storage capacity of the heater may have been exceeded by large demands of hot water If the heater was installed when incoming water temperatures were warm colder incoming temperatures will create the effect of less hot water Look for leaking or open hot water faucets WATER IS TOO HOT Referto TEMPERATURE REGULATION section WATER HEATER MAKES SOUNDS See MAINTENANCE WATER LEAKAGE IS SUSPECTED Check to see if the heater drain valve is tightly closed The apparent leakage may be condensation which forms on cool surfaces of the heater and piping If the outlet of the relief valve is leaking it may represent Excessive water pressure Excessive water temperature Faulty relief valve Excessive water pressure is the most common cause of relief valve leakage It is often caused by a closed system A check valve in the inlet system will not permit the
6. states do not allow the exclusion or limitation of the incidental or consequential damage so the above limitation or exclusion may not apply to you b This warranty gives you specific legal rights and you may also have other rights which vary from state to state Fill in the following for your own reference Keep it Registration is not a condition of warranty The model and serial number are found on the heater s rating plate Model No Serial No Date Installed Dealer s Name Dealer s Address Phone No City and State Zip 11 ProductPreservers ZA DLL WATER PRODUCTS COMPANY 5621 W 115TH STREET ALSIP IL 60803 Phone 800 433 2545 Fax 800 433 2515 www hotwater com e mail parts hotwater com 12
7. 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 Failure to inspect and or replace the anode rod will result in voiding the warranty Anode deterioration depends on water conductivity not necessarily water condition It may be necessary to have the anode rod inspected a few times during the first year to see what effect the water has had A corroded or pitted anode rod in the first year indicates high water conductivity and should be checked and or replaced more often than an anode rod that appears to be fairly clean Inspection should be conducted by a qualified technician REPLACEMENT PARTS Replacement parts may be ordered through dealers authorized servicers or distributors Refer to Yellow Pages for where to call or contact the Product Service Division 5621 W 115th Street Alsip IL 60803 1 800 433 2545 When ordering parts specify complete model number serial number see rating plate quantity and name of part desired Standard hardware items should be purchased locally TROUBLESHOOTING 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 Be certain that the water
8. 2 Open a nearby hot water faucet and the heater drain valve Be careful to grasp the drain valve handle in such a way that the hand will not be exposed to hot water 3 The drain valve must be left open during the shutdown period To restart heater refer to the foregoing FILLING instructions MAINTENANCE Electric water heater maintenance consists of cleaning the tank and removing lime or scale from the heating elements in hard water areas Tank flushing should be performed monthly Tank sediment removal and element lime scale removal must be performed when needed as determined by periodic inspections Your dealer should be contacted for element cleaning In some instances a hissing sound may be heard as the scale builds up This noise is normal Once a month the temperature and pressure relief valve should be checked to ensure that it is in operating condition Lift the lever on the valve several times until the valve seats properly and operates freely A CAUTION THE WATER PASSING OUT OF THE VALVE DURING THIS CHECKING OPERATION MAY BE EXTREMELY HOT It is recommended that the drain valve on this unit be opened once a month and 1 to 2 gallons of water be allowed to drain out This will help to prevent sediment buildup in the tank bottom ANODE ROD MAINTENANCE 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
9. ISHWASHER AND LAUNDRY USE CAN CAUSE SCALDS RESULTING IN SERIOUS PERSONAL INJURY AND OR DEATH THE TEMPERATURE AT WHICH INJURY OCCURS VARIES WITH THE PERSON S AGE AND TIME OF EXPOSURE THE SLOWER RESPONSE TIME OF CHILDREN AGED OR DISABLED PERSONS INCREASES THE HAZARD 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 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 thermostats See Figure 3 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 Figure 3 shows the approximate time to burn relationship for normal adult skin The thermostats on your water heater have a linear relationship between degrees of angular rotation and the corresponding change in temperature Thus rotating the temperature adjustment indicator 30 angular degrees will result in a 10 degree Fahrenheit change in water temperature Time to Produce 2nd amp 3rd Degree Burns on Adult Skin Nearly instantaneous About 1 2 second About 1 1 2 seconds Less than 5 seconds About 30 seconds About 2 minutes More than 5 minutes Temperature Setting 180 F 82 C 160 F 71 C 150 F 66 C 140 F 60 C 130 F 54 C 125 F 52 C 120
10. MODELS DEN AND DEL COMMERCIAL ELECTRIC WATER HEATERS Installation Electrical Wiring Diagrams Replacement Parts Operation Maintenance Leakage Checkpoints Limited Warranty ZA 5 WATER PRODUCTS COMPANY A DIVISION OF A O SMITH CORPORATION McBee South Carolina USA www hotwater com A CAUTION TEXT PRINTED OR OUTLINED IN RED CONTAINS INFORMATION RELATIVE TO YOUR SAFETY PLEASE READ THOROUGHLY BEFORE INSTALLING AND USING THIS APPLIANCE PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE Printed in U S A 0704 PART NO 195201 000 ROUGH IN DIMENSIONS OUTLET INLET OUTLET INLET 3 4 FEMALE 3 4 FEMALE 3 4 FEMALE 3 4 FEMALE NPT NPT NPT NPT 3 4 NPT s 12 RELIEF VALVE 5 OPENING TOP VIEW US DEL 6 10 15 20 TOP VIEW TOP VIEW 2142 JUNCTION DEL 30 40 50 DEN 30 120 63 5 mm BOX 3 4 NPT RELIEF VALVE OPENING BRASS DRAIN VALVE 3 3 4 95 25 mm B 3 3 4 95 25 mm ALTERNATE OUTLET 3 4 FEMALE NPT OUTLET 3 4 FEMALE NPT 3 4 NPT RELIEF VALVE OPENING ELECTRICAL CONNECTION INLET 3 4 FEMALE 7 NPT FRONT VIEW FRONT VIEW FRONT VIEW DEL 6 10 15 20 DEL 30 40 50 DEN 30 120 NO SIDE OUTLET AVAILABLE FOR DEL 6 MODELS ROUGH IN DIMENSIONS Models No of Tank Capacity A B c Approx D Shipping Weight Dimensions Elements US Gals Litres inches inc
11. QUIPMENT OR MATERIALS AS MEETING THE REQUIREMENTS FOR RELIEF VALVE DEVICES FOR HOT WATER SUPPLY SYSTEMS ANSI Z21 22 This valve must be marked with a maximum set pressure not to exceed the marked maximum working pressure of the water heater Install the valve into an opening provided and marked for this purpose in the water heater and orient it or provide tubing so SINGLE ELEMENT HEATER HOT WATER SUPPLY PIPE N 3 4 THREADED CONNECTION COLD WATER INLET LINE TFUSED ELECTRICAL SUPPLY SWITCH _SHUTOFF VALVE ELECTRICAL JUNCTION BOX TEMPERATURE AND PRESSURE ACCESS PANEL RELIEF VALVE DRAIN LINE DRAIN VALVE 6 AIR GAP e FLOOR DRAIN HOT WATER SUPPLY PIPE TFUSED ELECTRICAL SUPPLY SWITCH UNION COLD WATER INLET LINE 3 THREADED CONNECTION TEMPERATURE AND PRESSURE RELIEF VALVE FLOOR DRAIN T OVER CURRENT PROTECTION MUST BE SUPPLIED IN WATER HEATER CIRCUIT CONSULT LOCAL CODE OR NEC 1984 FOR PROPER INSTALLATION INSTALL IN ACCORDANCE WITH ALL LOCAL CODES that any discharge from the valve will exit only within 6 inches above or at any distance below the structural floor and cannot contact any live electrical part THE DISCHARGE OPENING MUST NOT BE BLOCKED OR REDUCED IN SIZE UNDER ANY CIRCUMSTANCES DUAL ELEMENT RATING PLATE COMMERCIAL STORAGE TANK WATER HEATER LISTED 22UL MODEL NUMBER SERIAL NUMBER ITEM ID PART NUMBER WATTS WATTS CAPACITY MAX
12. T INSTALLATION PROCEDURES INSTRUCTIONS MAY BE OBTAINED FROM YOUR LOCAL DEALER WHOLESALER PUBLIC UTILITIES OR CALIFORNIA S OFFICE OF STATE ARCHITECT 400 P STREET SACRAMENTO CA 95814 INSULATION BLANKETS Insulation blankets available to the general public for external use on electric water heaters are not approved for use on your A O Smith water heater 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 Act standards with respect to insulation and standby loss requirements making an insulation blanket unnecessary A WARNING Should you choose to apply an insulation blanket to this heater you should follow these instructions See page 5 for identification of components mentioned below Failure to follow these instructions can result in fire asphyxiation serious personal injury or death Do not cover the 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 labels from A O Smith for placement on the blanket directly over the existing labels EXTENDED NON USE PERIODS CAUTION HYDROGEN GAS CAN BE PRODUCED IN A HOT WATER SYSTEM SERVED BY THIS HEATER THAT HAS NOT BEEN USED FORA LONG PERIOD OF TIME GENERALLY TWO WEEKS OR MORE HYDROGEN GAS IS EXTREMELY FLAMMABLE To
13. TE FOR 120V SINGLE PHASE NON SIMULTANEOUS YELLOW UPPER ELEMENT HIGH LIMIT SINGLE THROW THERMOSTAT MUST NOT BE CONVERTED TO SIMULTANEOUS OPERATION IF TOTAL CURRENT DRAW EXCEEDS 48 AMPS FIELD CONVERSION LOWER ELEMENT TYPICAL PIPING CONNECTIONS This page shows typical water heater installations by model designations DUAL ELEMENTS HEATER TFUSED ELECTRICAL SUPPLY SWITCH COLD WATER INLET LINE ON 120 GALLON MODELS REPLACE SHIPPING NIPPLE WITH PIPE PLUG 3 4 THREADED HOT WATER CONNECTION SUPPLY PIPE M lt TEMPERATURE AND PRESSURE RELIEF VALVE ELECTRICAL JUNCTION BOX DRAIN LINE t 6 AIR GAP v FLOOR DRAIN DRAIN VALVE INSTALL SUITABLE DRAIN PANS UNDER HEATERS TO PREVENT DAMAGE DUE TO LEAKAGE REFER TO WATER HEATER LOCATION ON PAGE 2 INSTALL THERMAL EXPANSION TANK IF CHECK VALVE OR PRESSURE REDUCING VALVE IS USED IN SUPPLY LINE INSTALL VACUUM RELIEF IN COLD WATER INLET LINE AS REQUIRED BY LOCAL CODES TEMPERATURE AND PRESSURE RELIEF VALVE A CAUTION TO REDUCE THE RISK OF EXCESSIVE PRESSURES AND TEMPERATURES IN THIS WATER HEATER INSTALL TEMPERATURE AND PRESSURE PROTECTIVE EQUIPMENT REQUIRED BY LOCAL CODES BUT NOT LESS THAN A COMBINATION TEMPERATURE AND PRESSURE RELIEF VALVE CERTIFIED BY A NATIONALLY RECOGNIZED TESTING LABORATORY THAT MAINTAINS PERIODIC INSPECTION OF PRODUCTION OF LISTED E
14. accordance with proper sizing techniques for commercial 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 fired at the proper voltage and wattage as stated on the rating plate 12 maintained in accordance with the instructions printed in the manual included with the heater b Any accident to the water heater any misuse abuse including freezing or alteration of it any operation of it in a modified form or any attempt to repair tank leaks will void this warranty 4 SERVICE and REPAIR EXPENSE 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 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 All cost necessary or incidental for any materials and or permits required for installation of the replacement heater or part 5 LIMITATIONS ON IMPLIED WARRANTIES Implied warranties including any warranty of merchantability imposed on the sale of this heater under s
15. ace the heater until full inspection of all potential leak points is made and corrective steps taken to stop the leak Leakage from other Drain valve leakage could be from the valve itself To check for leakage where threaded portion enters tank insert Q tip or similar absorbent material between jacket opening and valve to swab spud area Remove valve if leak is indicated and repair with appliances water lines or ground seepage 1 pipe joint compound should also be suspected until proven f otherwise 7 Contact your dealer as it necessary to shut off Pay 08 electricity and drain tank to perform procedure 10 MODELS DEN AND DEL ELECTRIC WATER HEATER LIMITED WARRANTY A 0 Smith Corporation the warrantor extends the following LIMITED WARRANTY to the owner of this water heater 1 THE TANK If the glass lined tank in this water heater shall prove upon examination by the warrantor to have leaked due to natural corrosion from potable water therein during the first THREE years after initial installation the warrantor will supply a complete new A 0 Smith water heater of equivalent size and current model Some government agencies are requiring energy efficient standards for water heaters In the event regulations prohibit sale of a model of equivalent size and construction A 0 Smith will provide a model which complies with the regulations of your area in which case the consumer will be charged the dif
16. expanded hot water volume to equalize pressure with the main A relief valve must release this water or the water heater or plumbing system will be damaged When such a condition is encountered local codes or inspection agency should be consulted to determine which system is acceptable in your area These may consist of Installation of a second relief valve with lower setting than the primary safety relief valve expansion tank of suitable pressure and provision to avoid water logging Removal the check valve IF YOU CANNOT IDENTIFY OR CORRECT THE SOURCE OF THE MALFUNCTION 1 Place the water heater electrical switch in the OFF position 2 Close the cold water inlet valve to the heater 3 Contact your dealer NOTES LEAKAGE CHECKPOINTS Instructions Use this illustration as a guide when checking for sources of water leakage You or your dealer may be able to correct what appears to be a problem NOTE Cover and Insulation shown removed to reveal tank top Relief Valve Where possible remove or lift top cover to To Open Drain examine threads of fittings installed into tank for evidence of leakage Correct fitting leaks as necessary Condensation and dripping may appear on pipes when cold water temperature is low Pipe fitting may be leaking Water leaks at the elements may be due to 1 Defective element which leaks at terminals or thru flange Replace element Relief valve ope
17. ference in price between the like replacement and the energy efficient model required The warranty on the replacement water heater will be limited to the unexpired term of the original warranty 2 ALL OTHER PARTS If within ONE year after initial installation of this water heater any part or portion shall prove upon examination by the warrantor to be defective in material or workmanship the warrantor will repair or replace such part or portion at its option 3 CONDITIONS and EXCEPTIONS This warranty shall apply only when the water heater is installed in accordance with local plumbing and building codes ordinances and regulations the printed instructions provided with it and good industry practices In addition a temperature and pressure relief valve certified by A G A 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
18. hes inches inches Lbs Kg DEL 6 1 6 23 15 1 2 14 1 4 35 15 9 DEL 10 1 10 38 18 1 4 18 54 24 5 DEL 15 15 57 26 18 58 26 3 DEL 20 20 76 22 1 4 21 3 4 73 33 1 DEL 30 30 114 30 7 8 21 3 4 100 45 4 DEL 40 40 151 32 1 4 24 125 56 7 DEL 50 50 189 32 1 4 26 1 2 166 75 3 DEN 30 30 114 34 1 2 20 1 2 98 44 5 DEN 40 40 151 45 1 8 20 1 2 113 51 3 52 50 189 54 7 8 20 1 2 131 59 4 DEN 66 66 250 60 3 4 21 3 4 176 79 8 DEN 80 80 303 59 3 8 24 211 95 7 PO o Po DEN 120 119 450 RECOVERY CAPACITIES 62 7 16 29 3 8 oo 00 oo oo 326 147 9 40F Element Wattage INPUT Upper Lower KW NON SIMULATANEOUS OPERATION 1500 22 2C 2000 2500 3000 3000 4000 4000 4500 4500 5000 5000 6000 6000 SIMULATANEOUS OPERATION 3000 3000 4000 4000 4500 4500 5000 5000 6000 6000 Recovery capacities at 100 F rise equal for non simultaneous element operation 4 1 gal x KW of one element for simultaneous element operation 4 1 gal x 2 3 KW of both elements For other rises multiply element KW as previously explained by 410 and divide by temperature r
19. ise Full load current for single phase total watts voltage FOREWORD Thank you for buying this energy efficient water heater from A O Smith Water Products Company We appreciate your confidence in our products Detailed installation diagrams are in this manual These diagrams will serve to provide the installer with a reference for the materials and method of piping suggested IT IS NECESSARY THAT ALL WATER PIPING AND THE ELECTRICAL WIRING BE INSTALLED AND CONNECTED AS SHOWN IN THE DIAGRAMS In addition to these instructions the equipment shall be installed in accordance with those installation regulations in force in the local area where the installation is to be made Authorities having jurisdiction shall be consulted before installations are made GENERAL SAFETY INSTRUCTIONS BE SURE TO TURN OFF POWER WHEN WORKING ON OR NEAR THE ELECTRICAL SYSTEM OF THE HEATER NEVER TOUCH ELECTRICAL COMPONENTS WITH WET HANDS OR WHEN STANDING IN WATER WHEN REPLACING FUSES ALWAYS USE THE CORRECT SIZE FOR THE CIRCUIT The principal components of the heater are identified on page 5 The model and rating plate on page 6 interprets certain markings into useful information Both of these references should be used to identify the heater its components and optional equipment WARNING FOR CALIFORNIA INSTALLATION THIS WATER HEATER MUST BE BRACED ANCHORED OR STRAPPED TO AVOID FALLING OR MOVING DURING AN EARTHQUAKE SEE INSTRUCTIONS FOR CORREC
20. ize should be established through reference to the latest edition of 70 the National Electrical Code or other locally approved source in conjunction with the heater amperage rating For convenience portions of the wire size tables from the Code are reproduced here It is suggested the electrician size the branch circuit at 125 percent of the heater rating and further increase wire size as necessary to compensate for voltage drop in long runs CALCULATING AMPERAGE OVERCURRENT PROTECTION The heaters come from the factory in two configurations 1 Two wire C 2 circuit for single element heater equipped with a high limit control single phase power input 2 Four wire A 8 circuit for dual element heater equipped with two high limit controls single phase or three phase power input The heater with dual elements is factory wired for connection to a three wire three phase delta branch circuit non simultaneous operation In addition a ground conductor is required Element connection is for non simultaneous operation This means only one element at a time operates The wiring diagram on page 5 shows the heater may be field converted to simultaneous element operation by moving the red wire on J terminal to L1 It is then possible for both elements to operate at once as determined by the thermostats Regardless of element connection the heater operates in an unbalanced fashion The heater may be field converted t
21. lized to the water piping system The water heater should be located in an area not subject to freezing temperatures 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 Such pans should be at least two inches deep have a minimum length and width of at least two inches 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 distributor or A O Smith Products Service Division 5621 W 115th Street Alsip IL 60803 CLEARANCES A minimum clearance of 4 must be allowed for access to replaceable parts such as the thermostats drain valve and relief valve Adequate clearance for servicing this appliance should be considered before installation such as changing the anodes etc A FLOOD WARNING IF THE HEATER BECOMES IMMERSED IN WATER UP TO OR ABOVE THE LEVEL OF THE BOTTOM OF THE ELEMENT DOORS THE HEATER SHOULD BE EXAMINED BY A COMPETENT SERVICE PERSON BEFORE IT IS PLACED IN OPERATION CHEMICAL VAPOR CORROSION Water heater corrosion and component failure can be caused by the heating and breakdown of airborne chemical vapors Spray can propellants cleaning solvents refrigerator and air conditioning refrigerants swimming p
22. o single phase operation by moving the wire on L3 of the terminal block to L2 L3 is not used See page 5 The heater now in single phase non simultaneous operation may be field converted to single phase simultaneous operation by moving the red wire on terminal J to L1 refer to wiring diagram on page 5 This is an example of calculating heater amperage for both types of element operation From this the branch circuit conductor and overcurrent protection sizing can be established The example is of a three phase 240 volt unit with two 6 kw elements The notations are for units field converted to single phase Check the heater model and rating plate for actual specifications and substitute those values in the following Simultaneous Field conversion Non simultaneous as factory wired 3000 240 12 5 amps 3000 240 12 5 amps 12 5 x 1 73 21 6 amps NOTE as a single phase non simultaneous unit NOTE as a single phase simultaneous unit the total is 12 5 2 25 amps The rating of the overcurrent protection should be computed on the basis of 125 percent of the total connected load amperage Where the standard ratings and settings do not correspond with this computation the next higher standard rating or setting should be selected Portion of Table 310 16 follows Allowable Ampacities of Insulated Copper Conductors Not more than three conductors in Raceway or Cable or Direct Burial Based on
23. ool chemicals calcium and sodium chloride waxes and process chemicals are typical compounds which are potentially corrosive These materials are corrosive at very low concentration levels with little or no odor to reveal their presence Products of this sort should not be stored near the heater Also air which is brought in contact with the water heater should not contain any of these chemicals If necessary uncontaminated air should be obtained from remote or outside sources ELECTRICAL GENERAL Check the heater model and rating plate information against the characteristics of the branch circuit electrical supply DO NOT CONNECT THE HEATER TO AN IMPROPER SOURCE OF ELECTRICITY Contact the heater supplier for conversion information if necessary Voltage applied to the heater should not vary more than 5 to 10 of the model and rating plate marking for satisfactory operation DO NOT ENERGIZE THE BRANCH CIRCUIT FOR ANY REASON BEFORE THE HEATER TANK IS FILLED WITH WATER DOING SO WILL CAUSE THE HEATING ELEMENTS TO BURN OUT The factory wiring is attached to a terminal block within external junction box unit The branch circuit is connected to terminal block within this junction box The water heater should be connected to a separate grounded branch circuit with overcurrent protection and disconnect switch The water heater should be grounded in accordance with national and local codes BRANCH CIRCUIT The branch circuit wire s
24. ration and leakage may be due to water expansion during heating cycle 2 Loose element gasket leak or foreign material on seat of valve If the a Screw in type tighten with valve is not piped to an open drain the 1 1 2 socket wrench or Part Number 23985 released water could be mistaken for a wrench If leak continues remove f m leaking heater To check where threaded element discard gasket and clean thread 5 nonhardeningPermatex material between jacket opening and swab Number 2 to thread areas install new l M Er spud area remove valve if indicated and repair with pipe joint compound gasket and screw element into fitting until 0 as TOP OR SIDE ier it seats Tighten 1 2 to 3 4 turn with wrench RELIEF VALVE OPENING b Flange type tighten screw with wrench To Open Drain If leak continues remove element and discard gasket Clean gasket seating areas and re install element with new gasket NOTE Part Number 40000 1 scale cleaning replacement screws available where threads have become rusted or damaged preventing tightening land Water on the side of the tank may be condensation due to the panel or insulation not being in place E All water which appears at the heater bottom or on the surrounding floor may be caused by condensation loose connections or relief valve operation and leakage Do not repl
25. reduce the risk of injury under these conditions it is recommended that the hot water faucet be opened for several minutes at nearby 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 OPENED 4 CAUTION AN ELECTRICAL GROUND IS REQUIRED TO REDUCE RISK OF ELECTRIC SHOCK OR POSSIBLE ELECTROCUTION THE GROUND SCREW AT THE JUNCTION BOX IS FOR BONDING THE HEATER TO A GROUNDED SERVICE ENTRANCE CONDUCTOR A GROUNDED SERVICE ENTRANCE RACEWAY OR AN EARTH GROUNDING ELECTRODE CONDUCTOR A WARNING FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN SERIOUS PERSONAL INJURY OR DEATH REQUIRED ABILITY INSTALLATION OR SERVICE OF THIS WATER HEATER REQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED TRADESMAN IN THE FIELD INVOLVED PLUMBING AND ELECTRICAL WORK ARE REQUIRED GENERAL The installation must conform to these instructions the local code authority having jurisdiction and the requirements of the power company In the absence of code requirements follow the latest edition of NFPA 70 The National Electrical Code which may be ordered from National Fire Protection Association 1 Batterymarch Park Quincy MA 02269 LOCATION The water heater should be located as close as possible to or centra
26. tate law are limited to one 1 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 limitation may not apply to you 6 CLAIM PROCEDURE Any claim under this warranty should be initiated with the dealer who sold the heater or with any other dealer handling the warrantors products If this is not practicable the owner should contact U S Customers Canadian Customers A 0 Smith Water Products Company A 0 Smith Enterprises Ltd 5621 W 115th Street P 0 Box 310 768 Erie Street Alsip IL 60803 Stratford Ontario N5A 6T3 Telephone 1 800 323 2636 Telephone 1 800 265 8520 a The warrantor will only honor replacement with identical or similar water heater or parts thereof which are manufacture 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 RESPONSIBLE FOR WATER DAMAGE LOSS OF USE OF THE UNIT INCONVENIENCE LOSS OR DAMAGE TO PERSONAL PROPERTY OR OTHER CONSEQUENTIAL DAMAGE THE WARRANTOR SHALL NOT BE LIABLE BY VIRTUE OF THIS WARRANTY OR OTHERWISE FOR DAMAGE TO ANY PERSONS OR PROPERTY WHETHER DIRECT OR INDIRECT AND WHETHER ARISING IN CONTRACT OR IN TORT a Some
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