coMMercIal electrIc water heaters
Contents
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42. uuu Ta asas 9 Contaminated Water 9 CU UI e qhasa 9 Insulation Blankets 9 Temperature Pressure Relief 9 Closed Water Systems a 10 Thermal 42 16 10 uu uuu 11 622 2 ans 11 Branch Crett ea iah 11 Calculating Amperage Overcurrent Protection 11 WIRING DIAGRAMS aaae uuu 12 OPERATION 13 General 13 Filling the Water Heater 18 18 Draining the Water Heater 13 TEMPERATURE REGULATION 14 Temperature Adjustmenti 14 MAINTENANCE 1
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44. Failure to follow these instructions can cause serious injury or death This water heater is provided with a properly rated sized and certified combination temperature pressure relief valve by the manufacturer The valve is certified by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment of materials as meeting the requirements for Relief Valves for Hot Water Supply Systems ANSI 221 22 CSA 4 4 and the code requirements of ASME If replaced the new valve must meet the requirements of local codes but not less than a combination temperature and pressure relief valve rated sized and certified as indicated in the above paragraph new valve must be marked with a maximum set pressure not to exceed the marked hydrostatic working pressure of the water heater 150 psi 1 035 kPa and a discharge capacity not less than the water heater Btu hr or KW input rate as shown on the water heater s model rating plate For safe operation of the water heater the temperature and pressure relief valve must not be removed from its designated opening nor plugged The temperature pressure relief valve must be installed directly into the fitting of the water heater designed for the relief valve Install discharge piping so that any discharge will exit only within 6 inches 15 2 cm above or at any distance below the structural floor Be certain that no contact is made with
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50. 612 63 2578 552 4 46 DEN 40 54 7 8 1394 2012 521 025 71 250 6034 1543 2134 52 80 33 j 5938 1508 24 __ 120 2 19 450 62746 156 2938 76 N TABLE 2 RECOVERY CAPACITIES Element U S Gallons Hr and Litres Hr at TEMPERATURE RISE INDICATED Wattage _ kw 108 _ Upper Lower NON SIMULATANEOUS nso Joen o eoo T 5 2 2 19 o 2 20 5 91 5 7 ao ss 7 s 26 s 25 7 25 s s ce 156 7 sr c 2 2 2 5 13 ss 12 es 2 15004 c sr 2 2 22 us 5 7 s ss c s ss 2 5 2 r isa 12 17 z s 27 2 23 20 19 26 2 52 16 15 12 2 SIMULATANEOUS OPERATION 3000300 ar T 22 26 2 vo 2
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56. MODEL NUMBER VOLTAGE AND ELEMENT WATTAGE SERIAL NUMBER PART DESCRIPTION Del 6 10 15 20 Series 102 refer to repair parts table FIGURE 7 20 Description DEL 6 DEL 10 DEL 15 DEL 20 Series 102 Series 102 Series 102 Series 102 9003942005 9003944005 Anode Mag SMR P72 and 519 9001909005 9003721005 Collar Pipe 9004610115 9004610115 Cover Front 9003900005 9003900005 9003900005 9003900005 ELEMENT HEATING SEE ELEMENT CHART ON PAGE 23 Gasket Element 9000308005 9000308005 9000308005 9000308005 Opening Insulation 043307 000 043307 000 043307 000 Instruction Manual 322055 0 322055 0 322055 0 Personnel Protector 9003899015 9003899015 9003899015 Pipe Nipple 194130 194130 3 194130 3 194130 3 Plate Knockout 43293 1 43293 1 43293 1 43293 1 PLUG Thermostat with High Limit Switch 9003945005 9003945005 9003945005 9003945005 Bracket Thermostat 9003898015 9003898015 9003898015 9003898015 Valve Relief 9003484005 9003741005 9003741005 9003741005 Not Illustrated Standard Hardware Items May Be Purchased Locally Underlined Parts Are Recommended For Emergency Replacement FIGURE 8 FIGURE 9 21 Description DEL 30 Series 110 DEL 40 Series 110 DEL 50 Series 110 DEN 30 Series 110 DEN 40 Series 110 DEN 52 Series 110 DEN 66 Series 110 DEN 80 Series 110 DEN 120 Series 110 1A Anode 10 Dip Tube 11
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58. Power Terminal 12 Drain Valve Junction Box Assembly u uuu Illustrated 9003944005 9003721005 9003741005 9000308045 9003944005 9003721005 9003741005 9000308045 9003896215 9004533215 9003944005 9003721005 9003741005 9000308045 9003896215 9003896215 9004533215 9003944005 9003721005 9000071005 9000308045 9004533215 9003944005 9003721005 9000071005 9000308045 9003896215 9003896215 9003896215 9004533215 9003944005 9003721005 9000071005 9000308045 9004533215 9000029005 9003721005 9000071005 9000308045 9004533215 9003892005 9001829005 9000071005 9000308045 9003896215 9004533215 9003892005 9001829005 9000071005 9000308045 9003896215 9004533215 9003900005 9003902005 9005719215 9003906015 9003898215 9003899015 9003900005 9003902005 9005719215 9003906015 Standard Hardware Items May Be Purchased Locally 9003898215 9003899015 9003900005 9003902005 9005719215 9003906015 Underlined Parts Are Recommended For
59. YELLOW UPPER ELEMENT HIGH LIMIT NOTE MUST NOT BE CONVERTED TO SINGLE THROW SIMULTANEOUS OPERATION IF THERMOSTAT TOTAL CURRENT DRAW EXCEEDS 48 AMPS FIELD CONVERSION LOWER ELEMENT FIGURE 3 12 OPERATION GENERAL Refer to the Features and Components section of this manual page 7 for the location of components mentioned in the instructions that follow NEVER turn on power to the water heater without being certain the water heater is filled with water and a temperature and pressure relief valve is installed in the relief valve opening DO NOT TEST ELECTRICAL SYSTEM BEFORE HEATER IS FILLED WITH WATER FOLLOW FILLING AND START UP INSTRUCTIONS IN OPERATION SECTION ADANGER Full power is present whenever the cabinet door is opened even with the pilot switch turned off FILLING THE WATER HEATER CAUTION Property Damage Hazard In order to avoid water heater damage fill tank with water before operating 1 Turn off the electrical disconnect switch 2 Close the water heater drain valve 3 Open a nearby hot water faucet to permit the air in the system to escape 4 Fully open the cold water inlet pipe valve allowing the heater and piping to be filled 5 Close the hot water faucet as water starts to flow The heater is now ready for STARTUP and TEMPERATURE REGULATION 13 INITIAL START UP The following checks should be made by the installer when the heater is placed into operat
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62. Emergency Replacement 9003898215 9003899015 9003900005 9003902005 9005719215 9003906015 22 9003898215 9003899015 9003900005 9003903005 9005719215 9003906015 9003898215 9003899015 9003900005 9003904005 9005719215 9003906015 9003898215 9003899015 9003900005 9003905005 9005719215 9003906015 9003898215 9003899015 9003900005 9003905005 9005719215 9003906015 9003898215 9003899015 9003900005 9005709205 9005719215 9003906015 ae 195171 322055 0 FIGURE 10 TABLE 6 COPPER SHEATH ELEMENT AND WATTAGE CHART ELEMENT mw sow 9002963005 9000145005 9002884005 90012255 20 9003947005 9002858006 9000145005 9004709715 __ 9002865005 9003959005 22 9003950005 9004712105 3 5KW INPUT FOR 6 GALLON UNITS ELEMENTS BELOW DOTTED LINE CANNOT BE USED 6 GALLON UNITS 9002871005 9002867005 9002872005 9003953005 9003952005 TABLE 7 INCOLOY SHEATH ELEMENT AND WATTAGE CHART FOR SMR P72 w ELEMENT 120 V 208 V 277 V _ 2 5 2500 W 9004281005 9004285005 9004291005 9004295005 9004299005 INCOLOY ELEMENTS BELOW THIS LINE CANNOT BE USED 6 GALLON UNITS BECAUSE OF ELEMENT LENGTH 3000 W 9004282005 9004751115
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64. and or permits required for installation of the replacement heater or part LIMITATIONS ON IMPLIED WARRANTIES Implied warranties including any warranty of merchantability imposed on the sale of this heater under state 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 CLAIM PROCEDURE Any claim under this warranty should be initiated with the dealer who sold the heater or with any other dealer handling the warrantor s products If this is not practicable the owner should contact U S Customers Canadian Customers A O Smith GSW Water Heating 500 Tennessee Waltz Parkway 599 Hill Street West Ashland City TN 37015 Fergus ON N1M 2X1 Telephone 1 800 527 1953 Telephone 1 888 479 8324 a warrantor will only honor replacement with identical or similar water heater or parts thereof which are manufactured distributed by the warrantor b Dealer replacements are made subject to in warranty validation by warrantor 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 O
65. free to circulate at all times 4 a noncorrosive and non contaminated atmosphere 5 in the United States its territories or possessions and Canada 6 used with factory approved anode s installed 7 in its original installation location 8 sized in 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 not used in a closed system without a properly sized and installed thermal expansion tank 11 fired at the proper voltage and wattage 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 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
66. relief valve and the drain 10 ADANGER Water temperature over 125 F 52 C can cause severe burns resulting in severe injury or death Children the elderly and the physically or mentally disabled are at highest risk for scald injury Feel water before bathing or showering Temperature limiting valves are available Read instruction manual for safe temperature setting The temperature pressure relief valve must be manually operated at least once a year Caution should be taken to ensure that 1 no one is in front of or around the outlet of the temperature pressure relief valve discharge line and 2 the water manually discharged can cause bodily injury or property damage because the water may be extremely hot If after manually operating the valve it fails to completely reset and continues to release water immediately close the cold water inlet to the water heater follow the draining instructions in this manual and replace the temperature pressure relief valve with a properly rated sized new one If you do not understand these instructions or have any questions regarding the temperature pressure relief valve call the toll free number listed on the back cover of this manual for technical assistance CLOSED WATER SYSTEMS Water supply systems may because of code requirements or such conditions as high line pressure among others have installed devices such as pressure reducing valves check valves and back flow
67. 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 for Permanent Burns 2nd 4 3rd Degree Most Severe Burns Water Temperature Time for 1st Degree Burn F C Less Severe Burns 110 43 normal shower temp 116 47 pain threshold O 116 47 U S Government Memorandum C P S C Peter L Armstrong FIGURE 4 TEMPERATURE ADJUSTMENT The water temperature is controlled by surface mounted thermostats with ECO high 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 The over temperature device ECO high limit attached to each thermostat has a manual reset 12 250 25 277 VAC 12 54 480 FIGURE 5 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 120 F 49 C it is recommended that it not be set higher than the lower thermostat setting To chan
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71. 5 EE lt sN sassa 15 Anode Rod Inspection 15 TROUBLESHOOTING CHECKLIST 16 Ceria uu 16 Leakage Checkpoints 17 WARRANTIY 18 19 Repair Parts 20 INTRODUCTION Thank You for purchasing this water heater Properly installed and maintained it should give you years of trouble free service Abbreviations Found In This Instruction Manual e ANSI American National Standards Institute e AHRI Air Conditioning Heating and Refrigeration Institute e NEC National Electrical Code e NFPA National Fire Protection Association UL Underwriters Laboratory PREPARING FOR THE INSTALLATION WARNING Before removing any access panels or servicing the water heater make sure the electrical supply to the water heater is turned OFF Failure to do this could result in death serious bodily injury or property damage 1 Read the General Safety Information section of this manual first and then the entire manual carefully If you don t follow the safety rules the water heater may not operate safely It could cause DEATH SERIOUS BODILY INJURY AND OR PROPE
72. 8 15 2 2 T 400074000 gt is 227 205 1 to 5 136 123 12 150040 ce o 2 256 230 1 152 152 136 128 16 5000500 _____ zs se __________ 226 204 26 213 192 163 142 128 122 rs 22 sr su 46 256 230 206 164 155 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 other rises multiply element KW as previously explained by 410 and divide by temperature rise Full load current for single phase total watts voltage 5 6 9 5 Low Lead Content mt CERTIFIED www ahridirectory org All models are listed by Underwriters Laboratories Inc 0 MODEL AND RATING COMMERCIAL STORAGE ELECTRIC STORAGE TANK WATER HEATER C LISTED TANK WATER HEATER LISTED LLC 22U1 932N MODEL NUMBER SERIAL NUMBER ITEM ID PART NUMBER WATTS WATTS CAPACITY MAX WORKING VOLTS AC PHASE UPPER LOWER CIRCUIT US GAL PRESSURE WATTS WATTS TOTAL WATTS CAPACITY MA
73. 868006 500 406 0 5005221006 900096006 001096006 8002968006 lt 50069820006 9006221006 9008982006 9002982006 0 SNOTIVS 9 SALINN YANS 5951111 38413 LN3A dd AN SATIULNIOd SNOS SLNAWATA _SNOTIVS 9 SALINN lt lt JAHLNI SOLCLLYOOG S000S6 006 500 966006 900696006 _ ____ 8119221006 9007982006 00910006 500296006 moosi ___ ______ 000 9118982006 0 a AONVSSINd 14 ANIVS LNAWSA 13 NVATEVL 9 1 0 0 990 6 7 21961 910906006 9126129006 80026074006 89000066006 8 06686006 8 28686006 8 09066006 9126149006 00906006 900006006 9106682006 GLC868E006 910906006 9126129006 9009062 006 89000066006 GLO668E006 GLC868E006 8 09066006 9126129006 89007066006 89000066006 8 06686006 GLC868E006 91709062006 91 6129006 9002062006 9000062006 91706682006 91 28682006 9 591 910906006 9126149006 89002066006 89000066006 GLO668E006 GLC868E006
74. 9000664005 9004296005 9004300005 NotAvalape 9004289005 9004287005 NotAvaiabie NotAvalabie 23 Smith www hotwater com 500 Tennessee Waltz Parkway Ashland City TN 37015 Tech Support 800 527 1953 Parts 800 433 2545 Copyright 2012 A O Smith Water Heater Company All rights reserved S AJ S 1 sno 0 V 2102 1uBu doo 008 90914 6961 98 008 enbiuyos u nnos YSN 91022 NL AiO AemyJed 006 MMM von 5007827006 500682006 aauodsp uon o9 1 ASNVO SNOTIVS 9 SALINN ENS SASTILA 2413 5 LNAANAd AN SATULNIOd SNOS AO TOONI SLNAWA TA 591 S0066Zr006 S00S6Zr006 S001L6Zr006 S00S98Zr006 S00L9Zr006 60086006 600062 006 50068027006 soorezro0s 500082 006 0002 lqiuodsipuoN 90 98 7006 9000629006 50068027006 9006227006 009 ON 39319 80219 80219 ON 39919 32319 IN3W31341 A 09 222 A A 802 A 02 SONVSSINd 244 5 YNOd SONVSSINd 13 ANIVS 1 2 318V1 __500 282006 007282006 900296006 sooeseeoos 09 soozzezoos 9002982006 500 80068 mooss 5 5009621006 soorezioos 8002
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78. CTRICAL SUPPLY SWITCH UNION COLD WATER 3 THREADED SHUTOFF TEMPERATURE VALVE AND PRESSURE RELIEF VALVE UNION 1 2 DRAIN VALVE 6 MAX AIR GAP FLOOR DRAIN T OVER CURRENT PROTECTION MUST BE SUPPLIED IN WATER HEATER CIRCUIT CONSULT LOCAL CODE OR NEC 1984 FOR PROPER INSTALLATION INSTALL INACCORDANCE WITH ALL LOCAL CODES FIGURE 2 LOCATING THE NEW WATER HEATER FACTS TO CONSIDER ABOUT THE LOCATION CAUTION All water heaters eventually leak Donotinstall without adequate drainage The water heater should be located as close as possible to or centralized to the water piping system The water heater should be located in an area not subject to freezing temperatures The water 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 water heaters are available from your distributor or A O Smith Water Heater Parts Fulfillment 125 Southeast Parkway Franklin TN 37068 Water heater life depends upon water quality water pre
79. ILLING instructions when restoring hot water service A DANGER Burn hazard Hot water discharge Keep clear of drain valve outlet TEMPERATURE REGULATION ADANGER Water temperature over 125 F 92 C can cause severe burns resulting in severe injury or death Children the elderly and the physically or mentally disabled are at highest risk for scald injury Feel water before bathing or showering Temperature limiting valves are available Read instruction manual for safe temperature setting THE WATER HEATER IS EQUIPPED WITH AN ADJUSTABLE THERMOSTAT TO CONTROL WATER TEMPERATURE HOT WATER AT TEMPERATURES DESIRED FOR AUTOMATIC DISHWASHER AND LAUNDRY USE CAN CAUSE SCALDS RESULTING IN SERIOUS PERSONAL INJURY AND OR DEATH THE TEMPERATURE AT WHICH INJURY OCCURS VARIES WITH THE 5 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 AHOT WATER TAP OR TO DRAW THEIR OWN BATH WATER NEVER LEAVE A CHILD OR DISABLED PERSON UNATTENDED 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 4 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 4 shows
80. Instruction Manual A Smith 500 Tennessee Waltz Parkway Ashland City TN 37015 CANADIAN MANUAL Low Lead Content CERTIFIED www ahridirectory org Thank you for buying this energy efficient water heater We appreciate your confidence in our products AWARNING Read and understand this instruction manual and the safety messages herein before installing operating or servicing this water heater Failure to follow these instructions and safety messages could result in death or serious injury This manual must remain with the water heater gt AVA MODELS DEL 6 10 15 20 Series 102 DEL 30 40 50 Series 110 amp DEN 30 40 52 66 80 120 Series 110 INSTALLATION OPERATION SERVICE MAINTENANCE LIMITED WARRANTY z im F Smith 5 s e gt 4 WARNING If the water 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 qualified service agency before it is placed in operation see Page 2 PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE PRINTED 0912 321309 001 SAFE INSTALLATION USE AND SERVICE The proper installation use and servicing of this water heater is extremely important to your safety and the safety of others Many safety related messages and instru
81. MPETENT SERVICE PERSON BEFORE IT IS PLACED IN OPERATION INSTALLATION REQUIRED ABILITY Installation and service of this water heater requires ability equivalent to that of a qualified installer or service agency page 2 in the field involved Plumbing and electrical work is required GENERAL The installation must conform with these instructions and the local code authority having jurisdiction and the requirements of the power company In the absence of local codes the installation must comply with the latest editions of the National Electrical Code NFPA 70 or the Canadian Electrical Code CSA C22 1 The National Electrical Code may be ordered from National Fire Protection Association 1 Batterymarch Park Quincy MA 02269 The Canadian Electrical Code is available from the Canadian Standards Association 8501 East Pleasant Valley Road Cleveland OH 44131 Do NOT test electrical system before heater is filled with water follow the START UP procedure in the OPERATION section of this manual The principal components of the heater are identified in the Features and Components illustrations on page 7 ADANGER Water temperature over 125 F 52 C can cause severe burns resulting in severe injury or death Children the elderly and the physically or mentally disabled are at highest risk for scald injury Feel water before bathing or showering Temperature limiting valves are available Read instruction manual for safe t
82. OP OR SIDE RELIEF VALVE OPENING FIGURE 6 Condensation and dripping may appear on pipes when cold water temperature is low Pipe fitting may be leaking Relief valve operation and leakage may be due to water expansion during heating cycle or foreign material on seat of valve If the valve is not piped to an open drain the released water could be mistaken for a leaking heater To check where threaded material between jacket opening and swab spud area Remove valve if indicated and repair with pipe joint compound To Open Drain Water on the side of the tank may be condensation due to the panel or insulation not being in place 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 pipe joint compound Contact your dealer as it is necessary to shut off electricity and drain tank to perform procedure 17 WARRANTY A O Smith Corporation the warrantor extends the following LIMITED WARRANTY to the owner of this water heater 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 O Smit
83. R OTHER CONSEQUENTIAL DAMAGE THE WARRANTOR SHALL NOT BE LIABLE BY VIRTUE OF THIS WARRANTY OR OTHERWISE FOR DAMAGE TO ANY PERSONS OR PROPERTY WHETHER DIRECT OR INDIRECT AND WHETHER ARISING IN CONTRACT OR IN TORT a Some states 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 18 NOTES REPAIR PARTS LIST Now that you have purchased this water heater should a need ever exist for repair parts or service simply contact the company it was purchased from or direct from the manufacturer listed on the rating plate on the water heater Selling prices will be furnished on request or parts will be shipped at prevailing prices and you will be billed accordingly The model number of your Water Heater will be found on the rating plated located above the lower access panel DRAIN VALVE not supplied with heater Part No 26273 5 Be sure to provide all pertinent facts when you call or visit WHEN ORDERING REPAIR PARTS ALWAYS GIVE THE FOLLOWING INFORMATION
84. RTY DAMAGE This manual contains instructions for the installation operation and maintenance of the electric water heater It also contains warnings throughout the manual that you must read and be aware of All warnings and all instructions are essential to the proper operation of the water heater and your safety READ THE ENTIRE MANUAL BEFORE ATTEMPTING TO INSTALL OR OPERATE THE WATER HEATER 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 see page 12 The model and rating plates 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 2 The installation must conform with these instructions and the local code authority having jurisdiction and the requirements of the power company In the absence of local codes the installation must comply with the latest editions of the National Electrical Code NFPA 70 or the Canadian Electrical Code CSA C22 1 The National Electrical Code may be ordered from National Fire Protection Association 1 Batterymarch Park Quincy MA02269 The Canadian Electrical Code is available from the Canadian Standards Association 8501 East Pleasant Valley Road Cleveland OH 44131 3 If after reading this manual you have any que
85. RUH 14 2 THW THWN XHHW USE Types RUW 14 2 T TW UF 15 15 20 20 30 30 40 45 55 65 85 100 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 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 TABLE 5 Size Temperature Rating of Conductor See Table 310 13 in Code AMG 60 C 75 C MCM 140 F 167 F p T Types ypes RUW 12 2 T TW UF RH RHW RUH 12 2 THWN XHHW USE 10 25 25 T j 7 40 50 65 75 T 85 100 WIRING DIAGRAMS A 8 CIRCUIT FOR DUAL ELEMENT HEATER C 2 CIRCUIT 1 PHASE POWER IN een FOR SINGLE THREEPHASE CLOCKSWITCH ELEMENT HEATERS SIMULTANEOUS EQUIPPED WITH HIGH 1115 SINGLE PHASE LIMIT CONTROL NON SIMULTANEOQUS WITH OFF 3 PHASE POWER IN OPERATION CLOCKSWITCH JUNCTION THREE PHASE NON SIMULTANEOUS SINGLE PHASE SINGLE THROW SIMULTANEOUS THERMOSTAT ELEMENT HIGH LIMIT DOUBLE THROW FACTORY WIRED FIELD WIRING WHITE FOR 120V amp 277V
86. S SUSPECTED Refer to Leakage Checkpoint on the following page 17 1 Check to see if the heater drain valve is tightly closed 2 If the outlet of the relief valve is leaking it may represent Excessive water temperature Faulty relief valve Excessive water pressure 3 Excessive water pressure is the most common cause of relief valve leakage It is often caused by a closed system See Closed Water Systems and Thermal Expansion in the Installation section of this manual for more information 4 Examine the area around the element for gasket leakage Tighten the elements or if necessary follow the WATER AND LIME SCALE REMOVAL procedure to replace the gaskets IF YOU CANNOT IDENTIFY OR CORRECT THE SOURCE OF MALFUNCTION 1 Turn the power supply to the water heater off 2 Close the supply water inlet valve to the heater 3 Contact a Qualified Service Agency in your area Call the toll free phone number on the back cover of this Instruction Manual for assistance in locating a service agency in your area REPLACEMENT PARTS Call the toll free phone number on the back cover of this Instruction Manual for assistance in locating replacement parts When ordering parts specify complete model no serial no see rating plate quantity and name of part desired Standard hardware items should be purchased locally LEAKAGE CHECKPOINTS Instructions Use this illustration as a guide when checking fo
87. X WORKING TOTAL WATTS CONNECTED o INTERLOCK SIMULTANEOUS 1PH 3PH 1PH 3PH ALTERNATE RATINGS WATTS WATTS TOTAL WATTS VOLTS AC UPPER LOWER CONNECTED CIRCUIT DEL 30 40 50 amp DEN 30 40 52 66 80 120 DEL 6 10 15 20 FEATURES AND COMPONENTS ELECTRONIC CONTROL MODELS This page shows typical water heater installations by model designations DEN DEL DUAL ELEMENT HEATER TFUSED ELECTRICAL SUPPLY SWITCH ON 120 GALLON MODELS REPLACE SHIPPING NIPPLE WITH PIPE PLUG UNION HOT WATER SUPPLY PIPE ELECTRICAL JUNCTION BOX COLD WATER INLET LINE VALVE 3 4 THREADED CONNECTION TEMPERATURE AND PRESSURE RELIEF VALVE DRAIN LINE 6 MAX AIR GAP FLOOR DRAIN INSTALL SUITABLE DRAIN PANS UNDER WATER HEATERS TO PREVENT DAMAGE DUE TO LEAKAGE REFER TO WATER HEATER LOCATION ON PAGE 8 INSTALL THERMAL EXPANSION TANK IF CHECK VALVE OR PRESSURE REDUCING VALVE 15 USED IN SUPPLY LINE INSTALL VACUUM RELIEF IN COLD WATER INLET LINE AS REQUIRED BY LOCAL CODES DEN DEL SINGLE ELEMENT HEATER HOT WATER SUPPLY PIPE 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 MAX AIR GAP ow FLOOR DRAIN HOT WATER SUPPLY PIPE TFUSED ELE
88. any live electrical part The discharge opening must not be blocked or reduced in size under any circumstances Excessive length over 30 feet 9 14 m or use of more than four elbows can cause restriction and reduce the discharge capacity of the valve No valve or other obstruction is to be placed between the relief valve and the tank Do not connect discharge piping directly to the drain unless a 6 15 2 cm air gap is provided To prevent bodily injury hazard to life or property damage the relief valve must be allowed to discharge water in adequate quantities should circumstances demand If the discharge pipe is not connected to a drain or other suitable means the water flow may cause property damage CAUTION Temperature pressure relief valve discharge pipe must terminate at adequate drain The Discharge Pipe Shall not be smaller in size than the outlet pipe size of the valve or have any reducing couplings or other restrictions Shall not be plugged or blocked Shall be of material listed for hot water distribution Shall be installed so as to allow complete drainage of both the temperature pressure relief valve and the discharge pipe Must terminate a maximum of six inches above a floor drain or external to the building cold climates it is recommended that the discharge pipe be terminated at an adequate drain inside the building e Shall not have any valve or other obstruction between the
89. as those used for boiler treatment shall not be introduced into this system CIRCULATING PUMP Field installed circulating pumps should be of all bronze construction INSULATION BLANKETS Insulation blankets are available to the general public for external use on electric water heaters but are not necessary with this product The purpose of an insulation blanket is to reduce the standby heat loss encountered with storage tank heaters Your water heater meets or exceeds the EPACT and ASHRAE IES 90 1 standards with respect to insulation and standby loss requirements making an insulation blanket unnecessary Should you choose to apply an insulation blanket to this heater you should follow these instructions below Failure to follow these instructions can result in fire serious personal injury or death Do not cover the temperature and pressure relief amp valve with an insulation blanket e Do not cover the instruction manual Keep it on the side of the water heater or nearby for future reference e Do obtain new warning and instruction labels for placement on the blanket directly over the existing labels TEMPERATURE PRESSURE RELIEF VALVE A WARNING Temperature pressure relief valve must comply with ANSI 221 22 andASME code Properly sized temperature relief valve must be installed in opening provided Failure to install relief valve can result in overheating and exces sive tank pressure
90. ctions have been provided in this manual and on your own water heater to warn you and others of a potential injury hazard Read and obey all safety messages and instructions throughout this manual It is very important that the meaning of each safety message is understood by you and others who install use or service this water heater This is the safety alert symbol It is used to alert you to potential personal injury hazards Obey all safety messages that follow this symbol to avoid possible injury or death DANGER indicates an imminently hazardous situation which if not avoided will result death or injury WARNING indicates a potentially hazardous WARNING situation which if not avoided could result in death or injury CAUTION indicates a potentially hazardous A CAUTION situation which if not avoided could result in minor or moderate injury CAUTION used without the safety alert symbol indicates a potentially hazardous CAUTION situation which if not avoided could result in property damage All safety messages will generally tell you about the type of hazard what can happen if you do not follow the safety message and how to avoid the risk of injury The California Safe Drinking Water and Toxic Enforcement Act requires the Governor of California to publish a list of substances known to the State of California to cause cancer birth defects or other reproductive harm and requires businesses to warn of pot
91. d 3TIVAH31NI ANDINYAHL ALIWNOAS 5919115 5 m JANI NOILVLNAWI1V G ALINGNOD VT SNVG 1511111 LSA 5533 53003 531 SINDAY 31 YNOLAY NON ALINGNOD LadV19 31 5 IS 81 411 15 NOISNVWdX4 d YlOAYNASAY YATIVLSNI 8 V 4 4 NVAANON V AS ILINJ ANN SASNVS 541 44 541 SNOS SLVNODAGV SOVE 53 YATIVLSNI 1344 ANNVA ALINGNOO NN dvd ADALOYd A 3NOIY199413 NOILVLNAWITV d YNALdNYYSLNI NOILVLNAWITV 0 AVANL 105 NOHdIS od ALINGNOO ANDINYAHL V 5 1 3NNVA N 5919115 105 NOHdIS gt 9 XV STIVAMSLNI AONVAIA AdVdNOS 10818 NOILONOL AONVAIA ALINGNOD gt 310
92. emperature setting MIXING VALVE USAGE Water heaters are intended to produce hot water Water heated to a temperature which will satisfy space heating clothes washing dish washing cleaning and other sanitizing needs can scald and permanently injure you upon contact Some people are more likely to be permanently injured by hot water than others These include the elderly children the infirm or physically developmentally disabled If anyone using hot water in your home fits into one of these groups or if there is a local code or state law requiring a maximum water temperature at the hot water tap then you must take special precautions In addition to using the lowest possible temperature setting that satisfies your hot water needs a means such as a MIXING VALVE should be used at the hot water taps used by these people or at the water heater MIXING VALVES for reducing point of use temperature are available and are to be set at a maximum of 125 degree F Consult a qualified installer or service agency Follow all manufacturer s Instructions for installation of these valves Before changing the factory setting on the thermostat read the Temperature Regulation section in this manual WARNING not connect to non potable water system CONTAMINATED WATER This water heater shall not be connected to any heating system s or component s used with a non potable water heating appliance Toxic chemicals such
93. ential exposure to such substances This product contains a chemical known to the State of California to cause cancer birth defects or other reproductive harm This appliance can cause low level exposure to some of the substances listed in the Act IMPORTANT DEFINITIONS Qualified Installer or Service Agency Installation and service of this water heater requires ability equivalent to that of a Qualified Agency as defined by ANSI below the field involved Installation skills such as plumbing electrical supply are required in addition to electrical testing skills when performing service ANSI Z223 1 2006 Sec 3 3 83 Qualified Agency Any individual firm corporation or company that either in person or through a representative is engaged in and is responsible for a the installation testing or replacement of gas piping or b the connection installation testing repair or servicing of appliances and equipment that is experienced in such work that is familiar with all precautions required and that has complied with all the requirements of the authority having jurisdiction GENERAL SAFETY INFORMATION PRECAUTIONS DO NOT USE THIS WATER HEATER IF ANY PART HAS BEEN UNDER WATER Immediately call a qualified service technician to inspect the water heater and to replace any part of the control system which has been under water If the unit is exposed to the following do not operate heater until all correcti
94. ercent 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 12 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 to single phase operation by moving the wire on L3 of the terminal block to L2 L3 is not used see page 12 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 see page 12 11 This is an example of calculating heater am
95. ge the temperature setting 1 DANGER 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 personnel protectors covering the thermostats The thermostat is factory pre set at 120 F 49 C 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 MAINTENANCE GENERAL ADANGER Burn hazard Hot water discharge Keep clear of relief valve discharge outlet Periodically the drain valve should be opened and the water allowed to run until it flows clean This will help to prevent sediment buildup in the tank bottom Periodically check the temperature and pressure relief valve 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 Water heater maintenance includes periodic tank flushing and cleaning and removal of lime scale from the heating element The heater tank is equipped with an anode rod to aid in corrosion control 15 ANODE ROD INSPECTION CAUTION Property Damage Hazard Avoid water heater damage Inspection and replacement of anode rod required The anode rod is used to pr
96. h 6 9 Le Se T Z Haf ooy INVLINWIS NON 9002 2 999 9 09 2 556 2 05 d trr 2 0 2 6 lt 6 2 3 91 4 02 4 801 400 4 06 4 08 422 ei 08 99 N3d cS NAd 0 O NAd 0S 14d 07 140 06 1 02 140 L saq 01 130 LGL 144 68 LGL SNOILVSITIVNV9 JASIN SNOISNAWIG 318V1 9 1730 SATSGOW 537 ATGINOdSIC 1 1 1 31405 0Z SL OL 9 14d SNA 9119 95 od FAYLNA 1 5918 3 avana 1 9119 95 Od od 31 405 AAILVNYSLTV 31405 5 55 SNA FAYLNA 333n9134 0 0 SNA 2 2 62 66 5 02 02 NAG 2 Snssaq od 2 1 2 9 5 SYNLYAANO TINI 119 033 1105 04 07 06 19 ann 62 66 NOLIV Advdnos
97. h 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 O Smith will provide a model which complies with the regulations of your area in which case the consumer will be charged the difference in price between the like replacement and the energy efficient model required The warranty on the replacement water heater will be limited to the unexpired term of the original warranty 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 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 used 1 at temperatures not exceeding the maximum setting of its thermostat 2 at water pressure not exceeding the working pressure shown on the water heater 3 when filled with potable water
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99. ion for the first time 1 Turn off the electrical disconnect switch 2 Open the front panel or top access cover check all water and electrical connections for tightness Also check connections on top and or sides of heater Repair water leaks and tighten electrical connections as necessary 3 Depress the red manual reset button on each Thermostat ECO combination control See Figure 5 4 Turn the electrical disconnect switch 5 Observe the operation of the electrical components during the first heating cycle Use care as the electrical circuits are energized 6 Close the front panel or top access cover Temperature control and contactor operation should be checked by allowing heater to come up to temperature and shut off automatically Use care as the electrical circuits are energized DRAINING THE WATER HEATER The water heater must be drained if it is to be shut down and exposed to freezing temperatures Maintenance and service procedures may also require draining the heater 1 Turn off the electrical disconnect switch 2 Open a hot water valve until the water is cool then close the supply water inlet valve to heater 3 Attach hose to outlet opening of drain valve and direct end to drain 4 Open a nearby hot water faucet and the heater drain valve 5 If the heater is being drained for an extended shutdown it is suggested the drain valve be left open during this period The hose may be removed Follow F
100. must comply with the current editions of the National Electrical Code NFPA 70 or the Canadian Electrical Code CSA C22 1 An electrical ground is required to reduce risk of electrical shock or possible electrocution The water heater should be connected to a separate grounded branch circuit with over current protection and disconnect switch The water heater should be grounded in accordance with national and local codes 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 AND VOID WARRANTY The factory wiring is attached to a terminal block within the external junction box unit The branch circuit is connected to the 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 size should be established through reference to the current edition of NFPA 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 The branch circuit should be sized at 125 p
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104. ore hot water service See Figure 2 on page 7 in this manual to identify and locate water heater components WARNING removing any access panels or servicing the water heater make sure the electrical supply to the water heater is turned OFF Failure to do this could result in death serious bodily injury or property damage NOT ENOUGH OR NO HOT WATER 1 Be certain the electrical disconnect switch serving the water heater is in the ON position 2 Check the fuses The electrical disconnect switch usually contains fuses 3 If the water was excessively hot and is now cold the high limit switch may have activated See the Temperature Regulation section of this manual for more information on how to reset the ECO high limit controls 4 The capacity of the heater may have been exceeded by a large demand for hot water e Large demands require a recovery period to restore water temperature 5 Cooler incoming water temperature will lengthen the time required to heat water to the desired temperature 6 Look for hot water leakage 7 Sediment or pipe scale may be affecting water heater operation 16 ABNORMAL SOUNDS 1 Sediment or lime scale accumulations on the elements causes sizzling and hissing noises when the heater is operating e The sounds are normal however the tank bottom and elements should be cleaned See the Maintenance section of this manual WATER LEAKAGE I
105. otect the tank from corrosion Most hot water tanks are equipped with an anode rod The submerged rod sacrifices itself to protect the tank Instead of corroding tank water ions attack and eat away the anode rod This does not affect water s taste or color The rod must be maintained to keep tank in operating condition Anode deterioration depends on water conductivity not necessarily water condition A corroded or pitted anode rod indicates high water conductivity and should be checked and or replaced more often than an anode rod that appears to be intact Replacement of a depleted anode rod can extend the life of your water heater Inspection should be conducted by a qualified technician and at a minimum should be checked annually after the warranty period Artificially softened water is exceedingly corrosive because the process substitutes sodium ions for magnesium and calcium ions The use of a water softener may decrease the life of the water heater tank The anode rod should be inspected after a maximum of three years and annually thereafter until the condition of the anode rod dictates its replacement NOTE Artificially softened water requires the anode rod to be inspected annually TROUBLESHOOTING CHECKLIST CHECKLIST Before calling for service check the following points to see if the cause of trouble can be identified and corrected Reviewing this checklist may eliminate the need of a service call and quickly rest
106. perage 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 TABLE 3 as factory wired 3000 240 12 5 amps NOTE as a single phase _ simultaneous unit the total is 12 5 x 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 NFPA 70 follows Allowable Ampacities of Insulated Copper Conductors Not more than three conductors in Raceway or Cable or Direct Burial Based on Ambient Temperature of 30 86 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 Simultaneous Field conversion 3000 240 12 5 amps 12 5 x 1 73 21 6 amps as a single phase For ambient temperatures over 30 C 86 F see Correction Factors Note 13 in Code TABLE 4 See Table 310 13 in Code MCM 140 F 167 Types RH RHW
107. preventers Devices such as these cause the water system to be a closed system THERMAL EXPANSION As water is heated it expands thermal expansion In a closed system the volume of water will grow when it is heated As the volume of water grows there will be a corresponding increase in water pressure due to thermal expansion Thermal expansion can cause premature tank failure leakage This type of failure is not covered under the limited warranty Thermal expansion can also cause intermittent temperature pressure relief valve operation water discharged from the valve due to excessive pressure build up This condition is not covered under the limited warranty The temperature pressure relief valve is not intended for the constant relief of thermal expansion A properly sized thermal expansion tank should be installed on all closed systems to control the harmful effects of thermal expansion Contact a local plumbing service agency to have a thermal expansion tank installed ELECTRICAL WARNING e Before removing any access panels or servicing the water heater make sure the electrical supply to the water heater is turned OFF Failure to do this could result in death serious bodily injury or property damage GENERAL The installation must conform with these instructions and the local code authority having jurisdiction and the requirements of the power company In the absence of local codes the installation
108. r 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 Where possible remove or lift top cover to examine threads of fittings installed into tank for evidence of leakage Correct fitting leaks as necessary Water leaks at the elements may be due to 1 Defective element which leaks at terminals or thru flange Replace 2 Loose element gasket leak a Screw in type tighten with 1 1 2 socket wrench If leak continues remove element discard gasket and clean thread areas Apply nonhardening Permatex Number 2 to thread areas install new gasket and screw element into fitting until it seats Tighten 1 2 to 3 4 turn with wrench b Flange type tighten screw with wrench If leak continues remove element and discard gasket Clean gasket seating areas and re install element with new gasket A new element may be required where threads have become rusted or damaged preventing tightening All water which appears at the water heater bottom or on the surrounding floor may be caused by condensation loose connections or relief valve operation and leakage Do not replace the water heater until full inspection of all potential leak points is made and corrective steps taken to stop the leak Leakage from other appliances water lines or ground see page 16 should also be suspected until proven otherwise T
109. rify the power to the unit is turned off prior to opening the control cabinet door AWARNING Read and understand this instruction manual and the safety messages herein before installing operating or servicing this water heater Failure to follow these instructions and safety messages could result in death or serious injury This manual must remain with the water heater CAUTION Improper Installation use and service may result in property damage Do not operate water heater if flood damaged Inspect anode rods regularly replace when significantly depleted Install in location with drainage Fill tank with water before operation Properly sized thermal expansion tanks are required on all closed water systems Refer to this manual for installation and service A WARNING Flammable hydrogen gases may be present Keep all ignition sources away from faucet when turning on hot water A WARNING Before removing any access panels or servicing the water heater make sure the electrical supply to the water heater is turned OFF e Failure to do this could result in death serious bodily injury or property damage Water temperature over 125 F 52 C can cause severe burns resulting in severe injury or death Children the elderly and the physically or mentally disabled are at highest risk for scald injury DANGER Feel water before bathing or showering Tempera
110. ssure and the environment in which the water heater is installed Water heaters are sometimes installed in locations where leakage may result in property damage even with the use of a drain pan piped to a drain However unanticipated damage can be reduced or prevented by a leak detector or water shut off device used in conjunction with a piped drain pan These devices are available from some plumbing supply wholesalers and retailers and detect and react to leakage in various ways e Sensors mounted in the drain pan that trigger an alarm or turn off the incoming water to the water heater when leakage is detected Sensors mounted in the drain pan that turn off the water supply to the entire home when water is detected in the drain pan e Water supply shut off devices that activate based on the water pressure differential between the cold water and how water pipes connected to the water heater e Devices that will turn off the gas supply to a gas water heater while at the same time shutting off its water supply CLEARANCES A minimum clearance of 4 must be allowed for access to replaceable parts such as thermostats drain valve and relief valve Adequate clearance for servicing this water heater should be considered before installation such as changing the anodes etc 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 CO
111. stions or do not understand any portion of the instructions call the toll free number listed on the back cover of this manual for technical assistance A sample rating plate is shown on page 6 of this manual In order to expedite your request please have full model and serial number available for the technician 4 Carefully plan your intended placement of the water heater Examine the location to ensure the water heater complies with the Locating the New Water Heater section in this manual Installation and service of this water heater requires ability equivalent to that of a licensed tradesman or qualified agency page 2 in the field involved Plumbing and electrical work are required DIMENSIONS AND CAPACITIES DATA OUTLET INLET OUTLET INLET 3 4 FEMALE 3 4 FEMALE 3 4 FEMALE 3 4 FEMALE NPT NPT NPT NPT 3 4 NPT 2 1 2 IS RELIEF VALVE TOF VIEN BOX DEL 6 10 15 20 JUNCTION DEL 30 40 50 DEN 30 120 63 5 mm BOX ALTERNATE OUTLET OUTLET 3 4 FEMALE NPT B 3 4 FEMALE NPT 3 4 RELIEF VALVE OPENING A A ELECTRICAL DRAIN CONNECTION VALVE INLET 3 4 FEMALE 3 3 4 95 25 mm 3 3 4 95 25 mm 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 FIGURE 1 TABLE 1 ROUGH IN DIMENSIONS i Approx Elements mm 60 18 47 2012 ___50 189 3214
112. ture limiting valves are available Read instruction manual for safe temperature setting WARNING Overheated water can cause water tank explosion Properly sized temperature and pressure relief valve must be installed in opening provided TABLE CONTENTS SAFE INSTALLATION USE AND SERVICGE 2 GENERAL SAFETY INFORMATION 3 3 Hydrogen Gas Flammable INIRFODUCTION 2 uu uu ua uuu 4 Preparing for the Installation 4 DIMENSIONS AND CAPACITIES DATA 5 APPROVALS erort 6 MODEL AND RAI NO u u amsa plaas 6 FEATURES AND COMPONENTS 7 Electronic Control Models 7 LOCATING THE NEW WATER HEATER 8 Facts to Consider About the Location 8 Clearances 8 u endo 9 UL 9 General
113. ve steps have been made by a qualified service agency 1 External fire 2 Damage 3 Firing without water GROUNDING INSTRUCTIONS This water heater must be grounded in accordance with the National Electrical Code and or local codes These must be followed in all cases Failure to ground this water heater properly may also cause erratic control system operation on ELECTRONIC CONTROL models This water heater must be connected to a grounded metal permanent wiring system or an equipment grounding conductor must be run with the circuit conductors and connected to the equipment grounding terminal or lead on the water heater HYDROGEN GAS FLAMMABLE WARNING Flammable hydrogen gases may be present Keep all ignition sources away from faucet when turning on hot water 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 it is recommended that the hot water faucet be opened for several minutes at the kitchen sink before using any electrical appliance connected to the hot water system If hydrogen is present there will probably be an unusual sound such as air escaping through the pipe as the water begins to flow THERE SHOULD BE NO SMOKING OR OPEN FLAME NEAR THE FAUCET AT THE TIME IT IS OPEN When servicing this unit ve
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