A.O. Smith DSE-5 Owner's Manual
Contents
1. 2 RECOVERY CAPACITY 2 FOREWORD tenni 3 APPROVALS nnne nae ih eris 3 MODEL amp RATING PLATE 3 GETTING TO KNOW YOUR WATER HEATER 4 GENERAL SAFETY INFORMATION Insulation Blankets External Damage INSTALLATION Required Ability General Location Connections Relief Devices Temperature Limiting Control Hydrogen Gas PIPING DIAGRAMS ELECTRICAL General ete iet tees 13 Branch 2 13 APPROVALS All models bear the National Sanitation Foundation seal of approval All models are listed by Underwriters Laboratories Inc U L ASME 125 PSI Working Pressure 65 thru 120 Gallons 150 PSI Working Pressure 5 thru 50 Gallons PAN 63001 0 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 14 DO NOT TEST ELECTRICAL SYSTEM BEFORE HEATER IS FILLED WITH WATER FOLLOW START UP PROCEDURE ON PAGE 17 The principal components of the heater are identified on page 4 The model and rating plate on page 3 interprets certain markings into useful information Both of these references should be used to identify the heater its components and optional equipment PAGE Amperage Table Overcurrent Protection 14 Hea2. The load current rating and the overcurrent protection for these conductors shall not exceed 15 amperes for 14 AWG 20 amperes for 12 AWG and 30 amperes for 10 AWG copper or 15 amperes for 12 AWG and 25 amperes for 10 AWG aluminum and copper clad aluminum For dry locations only See 75 C column for wet locations AMPERAGE TABLE OVERCURRENT PROTECTION This table provides the total connected heating element load in amperes for branch circuit conductor and over current protection sizing Single phase heaters are two wire circuits Three phase heaters are three wire circuits In addition to the foregoing a ground conductor may be required 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 HEATER CIRCUITS The water heater s electrical components are pictured and identified in Figure 1 The following describes the heater circuits and includes wiring diagrams All heater circuits are designed for 60 hertz alternating current STANDARD KW INPUTS Standard Immersion Heaters Number of 50A Contractors CONTROL CIRCUIT The heater is equipped with 120 volt control circuit where all of the heating elements are switched on and off together This is the standard circuit and may be used with up to five ele
3. 3 4 ALL BRONZE er CIRCULATING PUMP r gt De FLOW f NN REGULATING sil PLUG COCK HEATER 8 9 T vr ji bw COLD WATER SUPPLY SIZED TO MEET APPLICATION AND CODE CONDITIONS TEMPERATURE AND PRESSURE RELIEF VALVE BALL VALVE 4 MEDIUM TEMPERATURE TWO HEATERS VERTICAL STORAGE TANK TEMPERATURE AND PRESSURE RELIEF VALVE ae HOT WATER TO FIXTURES M A THERMOMETER FUSED DISCONNECT SWITCH FLOW BALL STORAGE TANK ETS VALVE NO 150 ALL BRONZE CIRCULATING PUMP t TANK TEMP CONTROL 170 MAX SAME SIZE PIPE AS COLD SUPPLY BEFORE BRANCH TO FIRST HEATER MUST BE IDENTICAL HEATERS DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES SEE WATER TEMPERATURE CONTROL WARNING ON PAGES 17 amp 18 IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT ADD AN ANTI SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES HEATER NO 1 COLD WATER SUPPLY SIZED TO MEET APPLICATION AND CODE CONDITIONS MEDIUM TEMPERATURE TWO HEATERS HORIZONTAL STORAGE TANK CIRCULATING PUMP WIRING DIAGRAM LINE TEMPERATURE CONTROL CIRCULATING PUMP 12 120 NEUTRAL 1 TANK TEMP CONTROL 170 MAX RETURN LINE FROM FIXTURE CIRCULATING LOOP IF USED SHOULD CONNECT TO ANY OPENING NEAR BOTTOM OF TANK SAME SIZ PIPE AS COLD SUPPLY BEFORE BRANCH TO FIRST HEA
4. TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES SEE WATER TEMPERATURE CONTROL WARNING ON PAGES 17 amp ONE OR TWO TEMPERATURE FOUR HEATERS 18 IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT ADD AN ANTI SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES FUSED VALVE DISCONNECT SWITCH mE FLOW HOT WATER VALVE REGULATING OUTLET BALL RETURN LINE FROM PLUG COCK CIRCULATING LOOP FOR STORED TEMPERATURE WATER IF USED LINE TEMPERATURE 2L CONTROL _ TEMPERATURE AND PRESSURE Rahal BALL RELIEF VALVE S O VALVE N ALL BRONZE wy CIRCULATING Se 2222 PUMP CIRCULATING PUMP WIRING DIAGRAM LINE TEMPERATURE j e 2 ALL MANIFOLDING MUST 2 BE EQUAL IN LENGTH a CONTROL L2 120V AC 2 NEUTRAL MUST BE IDENTICAL HEATERS 8 TEMPERATURE AND PRESSURE RELIEF VALVE 3 HOT WATER TO FIXTURES MEDIUM TEMPERATURE ONE HEATER VERTICAL STORAGE TANK r a f t C FLOW 9 REGULATING 4 Tet PLUG COCK 3 4 3 4 ALL BRONZE NN 1j SYSTEM CIRCULATING N PUMP STORAGE TANK 2 2 4 VALVE N aa f a 2 FUSED di DISCONNECT TANK TEMP SWITCH CONTROL i 170 F MAX al TEMPERATURE 5 E i AND PRESSURE 54 v a RELIEF VALVE RETURN LINE FROM FIXTURES CIRCULATING LOOP IF USED SHOULD CONNECT TO ANY OPENING NEAR BO
5. 1 Check to see if the heater drain valve is tightly closed 2 Ifthe outlet of the relief valve is leaking it may represent Excessive water temperature e Faulty relief valve Excessive water pressure e 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 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 set to lower than the primary safety relief valve expansion tank of suitable pressure and provision to avoid water logging Removal of the check valve 4 Examine the flange area of the elements for gasket leakage Tighten the bolts or if necessary follow the WATER AND LIME SCALE REMOVAL procedure to replace the gaskets e Refer to LEAKAGE CHECKPOINTS on page 22 IF YOU CANNOT IDENTIFY OR CORRECT THE SOURCE OF MALFUNCTION 1 Place the water heater electrical switch in the OFF position 21 2 Close the supply water inlet valve to the heater 3 Contact your dealer REPLACEMENT PARTS Replacement parts may be ordered through dealers authorized servicers or distr
6. CHECKING EQUIPMENT Not enough or no hot water 1 Becertain the electrical disconnect switch serving the water heater is in the ON position 2 Check the fuses electrical disconnect switch usually contains fuses 3 Ifthe water was excessively hot and is now cold the high limit switch may have operated Toreset remove the plug from the top cover of the heater and push the reset button Repeated operation of the high temperature cutoff should be investigated by your dealer 4 The capacity of the heater may have been exceeded by a large demand for hot water 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 wastage and leakage 7 Sediment or lime scale may be affecting water heater operation Refer to page 18 for details Water is too hot 1 Refer to TEMPERATURE REGULATION Water heater makes sounds 1 Sediment or lime scale accumulations on the elements causes sizzling and hissing noises when the heater is operating The sounds are normal However the tank bottom and elements should be cleaned Refer to page 18 for details 2 Some of the electrical components of the water heater make sounds which are normal e Contactors will click or snap as the heater starts and stops e Contactors often hum Water leakage is suspected
7. DOING SO WILL CAUSE THE HEATING ELEMENT TO BURN OUT The branch circuit is connected to the heater wiring through an opening provided on the heater BRANCH CIRCUIT The branch circuit wire and fuse size should be established through reference to the latest version of the National Electrical Code or other locally approved source in conjunction with the heater amperage rating Branch circuit wires should be 75 C temperature rated 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 ampere rating and further increase wire size as necessary to compensate for voltage drop in long runs Branch circuit voltage drop should not exceed 3 at the heater TABLE 310 16 Allowable Ampacities of Insulated Conductors Not More Than Three Conductors in Raceway or Cable or Earth Directly Buried Based on Ambient Temperature of 30 C 86 F Temperature 85 C 185 F TYPES V MI 60 C 140 75 C 167 F 194 F Rating of Condu 90 C le 310 75 C 167 F ctor See tab 60 C 140 85 C 185 F TYPES 90 C 194 F CORRECTION FACTORS Ambient Temp 31 40 41 50 51 60 61 70 For ambient temperatures over 30 C multiply the amacities shown by the appropriate correction factor to determine the maximum allowable load current Ambient Temp F 86 104 105 122 123 141 142 158 159 176
8. IT OR PROVIDE TUBING SO 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 THIS DISCHARGE OPENING MUST NOT BE BLOCKED OR REDUCED IN SIZE UNDER ANY CIRCUMSTANCES The pressure setting of the relief valve should not exceed the pressure capacity of any component in the system The temperature setting of the relief valve should not exceed 210 TEMPERATURE LIMITING CONTROL The heater control circuit contains a high temperature cutoff switch which operates if excessive water temperatures are reached The high temperature cutoff contacts open at 190 F and must be manually reset after a 30 F drop in water temperature Disconnect the power before resetting button HYDROGEN GAS FLAMMABLE HYDROGEN GAS CAN BE PRODUCED IN 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 P
9. and side of heater Repair water leaks and tighten electrical connections as necessary 2 Depress red button on manual reset high limit switch 3 Turn on the electrical disconnect switch 4 Observe the operation of the electrical components during the first heating cycle Use care as the electrical circuits are energized Thermostat and contactor operation should be checked by a manually operating thermostat and b allowing the heater to come up to temperature and shutoff automatically thermostat operates all contactor coils simultaneously 5 Close the access door TEMPERATURE REGULATION DANGER 18 DANGER THIS WATER HEATER IS EQUIPPED WITH AN ADJUSTABLE THERMOSTAT TO CONTROL WATER TEMPERATURE HOT WATER TEMPERATURES REQUIRED FOR AUTOMATIC DISHWASHER AND LAUNDRY USE CAN CAUSE SCALD BURNS 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 DISABLED PERSONS INCREASES THE HAZARDS TO THEM NEVER ALLOW SMALL CHILDREN TO A HOT WATER TAP OR TO DRAW THEIR OWN BATH WATER NEVER LEAVE A CHILD DISABLED PERSON UNATTENDED IN A BATHTUB OR SHOWER THE WATER HEATER SHOULD BE LOCATED IN AN AREA WHERE THE GENERAL PUBLIC DOES NOT HAVE ACCESS TO SET TEMPERATURES SETTING THE WATER HEATER TEMPERATURE AT 120 F WILL REDUCE THE RISK OF SCALDS Some states require settings at specific lower t
10. 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 material and or permits required for installation of the replacement heater or part 5 LIMITATIONS ON IMPLIED WARRANTIES Implied warranties including the warranty of merchantability imposed on the sale of this heater under state law are limited to 1 year duration for the heater or any of its parts Some states do not allow limitation on how long an implied warranty lasts so the above limitation may not apply to you 6 CLAIM PROCEDURE Any claim under the warranty should be initiated with the dealer who sold the heater or with any other dealer handling the warrantor s products If this is not practicable the owner should contact U S Customers Canadian Customers A O Smith Water Products Company A O Smith Enterprises Ltd 5621 W 115th Street 310 768 Erie Street Alsip IL 60803 Stratford Ontario N5A 6T3 Telephone 800 323 2636 Telephone 519 271 5800 a The warrantor will only honor replacement with identical or similar water heater or parts thereof which are manufactured or distributed by the warrantor b Dealer replacements are made subject to in warranty validation by warrantor 7 DISCLAIMERS NO OTHER EXPRESS WARRANTY HAS BEEN OR WILL BE MADE IN BEHALF OF THE WARRANTOR WITH RESPEC
11. water heated increases more scale results 2 Water temperature As the temperature of water is in creased more scale is deposited on the elements 3 Characteristics of water supply Regardless of water treatment the elements should be examined regularly Lime scale accumulations may cause noises to occur during operation It is recommended that a heating element be removed periodically for examination If it is scaled all of the elements should be removed and cleaned If the tank bottom has an accumulation of sediment it should be cleaned Lime scale should be removed by dissolving the accumulation UN LIMEG delimer UN LIME is a non muriatic delimer available from A O Smith Water Products Company Product Service Division 5621 W 115th ST Alsip IL 60803 Do not use muriatic or hydrochloric acid base deliming solutions to remove lime scale from the elements 1 Turn off electrical disconnect switch 2 Drain the heater following DRAINING instructions 3 Open front access door 4 Disconnect the element wiring Try not to disturb the wiring unnecessarily and reconnection will be easier 5 Remove the bolts from each element 6 Remove the elements from the openings e Use a twisting pulling action to remove elements scaled beyond size of the tank openings Brush loose scale from elements 7 Lime scale removal Place limed ends of heating elements into UN LIME delimer and allow scale to dissolve
12. ALL VALVE BALL FUBED VALVE LOCAL CODES VALVE DISCONNECT SEE NOTE d SWITCH Beers S 2 NOTE 5 2 BALL ji Ves n BRANCH PIPING ALL HEATERS 3 ere AND PRESSURE Y Em s Cv RELIEF VALVE EQUAL FLOW THESE BRANCHES MAY ws BE SIZED UP TO 1 1 4 SO THAT CROSS HEATER 2 SECTIONAL AREAS OF ALL INLETS AND NO 1 11 2 HV ALL OUTLETS AT LEAST EQUAL AREA OF d gt BRONZE MUST BE SAME SIZE AND LENGTH FOR amp CIRCULATING THEIR RESPECTIVE MAIN PIPING a d PUMP HEAT TRAP TO NO 2 REVERSE RETURN PIPING SHOWN Li HEATER HEATER NO n 9 FLOW REGULATING CIRCULATING PUMP WIRING DIAGRAM LU LINE 4 hen TEMPERATURE Ez CONTROL N L2 em CIRCULATING x e PUMP MUST BE IDENTICAL HEATERS NEUTRAL COLD WATER SUPPLY SIZED TO MEET APPLICATION AND CODE CONDITIONS 11 MEDIUM TEMPERATURE FOUR HEATERS VERTICAL STORAGE TANK TEMPERATURE HOT WATER AND PRESSURE TO FIXTURES RELIEF VALVE THERMOMETER FUSED GATE DISCONNECT TEMPERATURE VALVE SWITCH AND PRESSURE RELIEF VALVE TEMPERATURE AND PRESSURE RELIEF VALVE FLOW REGULATING PLUG COCK t 2 CHECK VALVE LC SEE NOTE 2 ALL BRONZE CIRCULATING AN PUMP DRAIN VALVE T TANK TEMP CONTROL 170 MAX SAME SIZE PIPE AS COLD SUPPLY BEFORE BRANCH TO FIRST HEATER CIRCULATIN
13. ANGAL RESETTO 79 24 SE PUSHBUTTON L PROBE end GREEN 1 TI TIME CLOCK Py FUSE wd 9 1 1 P ers 9 ts i bea e gd 1 i Dux j NO 1 1 22 WENE lt AES THERMOSTAT F CNTCTR S 1 1 1 6 b M 1 ies SS 2 QAANNANAANNI i Ei pie STD WIRING 1 1 v WWWWW FUSING PROVIDED 7777777 OR AS REQ D HEATING WHEN AMP DRAW AV ELEMENTS EXCEEDS 120A SMALL COMMERCIAL WIRE DIAGRAM 300 600V 3PH 16 gt ea FUSES 300 600V 3 PRIMARY PILOT LT MAN RESET AUTO RESET X FMR SEC amp SWITCH HI LIMIT HI LIMIT 120v SEC FUSE BLACK GND PROBE ae E pe J a C ete c HP SWITCH aI TIME CLOCK ad di a L4 D LP SWITCH EJ x3 dd EJ EIET EJ EJ NE 1 rd T TT ppt yt pd FUSES L Ede D ee oed s No Ll THERMOSTAT d zd E n SF L N OR STD WIRING 1 1 Ll 41 4 2 OPT L WIRING EP OR AS REQ D Fog Fog l FUSING PROVIDED EE WHEN DRAW EXCEEDS 120A HEATING ELEMENT S SMALL COMMERCIAL WIRE DIAGRAM 300 600V SMALL COMMERCIAL WIRE DIAGRAM SINGLE PHASE 300 600 3 _ PILOT LT PRIMARY T SEC MAN RESET LER KAW FUSES ES SEG saco USE SATOR HI LIMIT HIGH ME HEA
14. Do not permit delimer or water to contact heating element electrical terminals Other scale removal e Silicates sulfates and aluminates must be removed by scraping or other mechanical means Lime scale solvents will not remove these types of scale which are occasionally encountered 8 Flush cleaned ends of elements with water when deliming or cleaning is completed 9 Remove sediment and scale from the tank bottom through the access provided by the element opening s The cold water inlet valve and drain valve may be opened to aid the cleanout process 10 Clean remaining gasket material from tank and element flanges DO not reuse original element gaskets The element gaskets should be replaced whenever an element is removed 11 Put new gaskets on each element and install into tank openings Uniformly tighten element bolts 12 Attach element wires to connection points from which they were removed 13 Follow FILLING instruction to restore hot water service e Check for water leaks around elements and proper operation when heater is filled Close front access door 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 restore hot water service Figure 1 identifies the location of all of the heater components BE SURE TO TURN OFF THE ELECTRICITY WHEN
15. Dura Power Electric Models DSE 5 THRU DSE 120 COMMERCIAL WATER HEATERS Installation Operation Maintenance Checklist Limited Warranty gt ZAN Co SAATTE TEXT PRINTED OR OUTLINED IN RED CONTAINS WATER PRODUCTS INFORMATION RELATIVE TO YOUR SAFETY PLEASE READ COMPANY THOROUGHLY BEFORE INSTALLING AND USING THIS APPLIANCE A DIVISION OF A O SMITH CORPORATION RENTON WASHINGTON www hotwater com KEEP THIS MANUAL WITH THE HEATER FOR FUTURE REFERENCE WHENEVER MAINTENANCE ADJUSTMENTS OR SERVICE IS REQUIRED PART NO 60047 004 REV 6 PRINTED IN U S A 700 SUPERSEDES PART NO 60047 004 REV 5 DIMENSIONS 3 4 NPT OUTLET 3 4 NPT RELIEF VALVE OPENING INLET FIELD WIRE 11 4 NPT OUTLET 3 4 NPT RELIEF VALVE OPENING INLET FIELD WIRE ENTRANCE ENTRANCE P B l HINGED ACCESS ACCESS OR DOOR 11 4 NPT INLET 3 4 NPT INLET 65 THRU 120 MODELS Tank Capacity All Dimensions in Inches in Gallons KWipt A B C D 5 THRU 50 Approx Ship Wt Lbs 5___ s f 2072 1614 2112 s5 m j 82 10 6 1834 24 514 106 50 90 5434 2012 27 534 221 65 90 5012 412 314 7 267 80 90 4914 2612 3214 7 285 100 90 5814 2612 3214 7 354 119 902 6314 28 3334 712 420 RECOVERY RATE IN GA
16. EMENTS FROM DAMAGE DUE TO LACK OF WATER IN THE HEATER POWER DISTRIBUTION BLOCK ONLY WHEN THERE ARE MORE THAN ONE CONTACTOR LOW WATER CUTOFF RELAY OPTIONAL POWER CIRCUIT FUSES CONTACTOR CONTROL CIRCUIT FUSES CONTROL CIRCUIT DRAIN VALVE gt TRANSFORMER LOW WATER CUTOFF PROBE OPTIONAL INSULATION ELEMENT THERMOSTAT FLOOR DRAIN HINGED ACCESS DOOR WATER INLET OPENING FIGURE 1 4 GENERAL SAFETY INFORMATION 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 Conservation 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 Figure 1 for identification of components mentioned below Failure to follow these instructions can result in fire asphyxiation serious personal injury or death 1 DONOT COVER THE JUNCTION BOX EXTERNAL WIRING THERMOSTATS OR HEATING ELEMENTS ON ELECTRIC WATER HEATER 2 DONOT COVER THE TEMPERATURE PRESSURE RELIEF VALVE 3 DO NOT COVER OPERATING INSTRUCTIONS INSTALLATION OR
17. G PUMP WIRING DIAGRAM GUY LINE 2 TEMPERATURE MUST BE IDENTICAL HEATERS E COLD WATER CIRCULATING SUPPLY SIZED TO TED AC s PUMP MEET APPLICATION AND CODE CONDITIONS NEUTRAL MEDIUM TEMPERATURE FOUR HEATERS HORIZONTAL STORAGE TANK TEMPERATURE AND PRESSURE TO EIkTURE E THERMQMETER RELIEF VALVE TTANK TEMP A CAUTION IF BUILDING COLD WATER 2 DANGER SUPPLY HAS BACK FLOW TEMPERATURE SETTING SHOULD NOT PREVENTER CHECK VALVE OR WATER 7 EXCEED SAFE USE TEMPERATURE METER WITH CHECK VALVE FIXTURES SEE WATER TEMPERATURE PROVISIONS FOR THERMAL EXPANSION OF WATER IN THE HOT WATER SYSTEM MUST BE PROVIDED STORAGE TANK CONTROL WARNING ON PAGES 17 amp 18 IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT ADD AN ANTI SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES SAME SIZE PIPE AS COLD SUPPLY BEFORE BRANCH TO FIRST HEATER PIPE RELIEF VALVE TO OPEN DRAIN T TANK TEMPERATURE CONTROL SET AT DESIRED TEMPERATURE MAX 170 HEATER THERMOSTAT SET AT LEAST 5 HIGHER RETURN LINE FROM FIXTURE CIRCULATING LOOP IF USED T amp P RELIEF GATE FUSED DISCONNECT CHECK 2 ALL BRONZE INSTALL IN ACCORDANCE WITH ALL 3 VALVE CIRCULATING LOCAL CODES SWITCH PUMP NOTE CN BRANCH PIPING TO ALL HEATERS x MUST BE SAME SIZE AND LENGTH FOR d EQUAL FLOW THESE BRANCHES MAY BE SIZED UP TO 1 1 4 SO THAT CROS
18. IPING DIAGRAM ONE OR TWO TEMPERATURE ONE HEATER MIXING VALVE APPLICATION FOR TWO TEMPERATURE SYSTEM THERMOMETER HOT WATER OUTLET 3 FUSED TEMPERED DISCONNECT OUTLET SWITCH CHECK VALVE TEMPERATURE AND PRESSURE MIXING RELIEF VALVE VALVE HEATER CHECK VALVE RETURN LINE FROM CIRCULATING LOOP FOR STORED TEMPERATURE WATER IF USED FLOW CIRCULATING RETURN LINE CONNECTIONS HESPEABING TEMPERED WATER LOOP IF USED CONNECT TO POINT R PLUG COCK LINE SA TEMPERATURE CAUTION IF BUILDING COLD WATER SUPPLY HAS A CONTROL BACK FLOW PREVENTER CHECK VALVE OR WATER METER WITH CHECK VALVE PROVISIONS FOR THERMAL EXPANSION OF WATER IN THE HOT WATER SYSTEM MUST Po BE PROVIDED iip ALL BRONZE DRAIN CIRCULATING PIPE TO OPEN DRAIN VALVE PUMP INSTALL IN ACCORDANCE WITH ALL LOCAL CODES e ONE OR TWO TEMPERATURE TWO HEATER FUSED DISCONNECT SWITCH A DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES SEE WATER TEMPERATURE CONTROL WARNING ON PAGES 17 amp 18 IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT ADD AN ANTI SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES CIRCULATING PUMP WIRING DIAGRAM LINE TEMPERATURE CONTROL CIRCULATING L2 120V AC L2 PUMP NEUTRAL HEATER RETURN LINE FROM CIRCULATING LOOP FOR STORED TEMPERATURE WATER IF USED HOT WATER LINE TEMPERATURE CHECK CONTROL VAL
19. LLONS PER HOUR Temperature Rise F STANDARD BTU 50 70 80 100 110 120 130 140 HOUR 10259 Ex a ae ps ps pep ose Ese sr 12 os 16 zs ee 7o or 55 49 45 35 77 6 sr j 5 sr 4 24 stem ss z rer rer 140 12s toa se o amp re 70 158 176 219 Figured at 1KW 3413 Btu 4 1 Gallons at 100 F temperature rise To determine recovery rate per minute divide recovery rate per hour by 60 NSF ratings may be obtained by multiplying above figures by 0 98 Available on 50 gallon models or larger FOREWORD 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 Particular attention should be given to the installation of thermometers at the locations indicated in the diagrams as these are necessary for checking the operation of the heater In addition to these instructions the equipment shall be installed in accordance with those installation regulations in force in the local area where installation is to be made Authorities having jurisdiction shall be consulted before installations are made BE SURE TO TURN OFF POWER WHEN WORKING ON OR CONTENTS PAGE
20. LOW DISCONNECT kr 2 eee ir e vaye 0 RELIEF VALVE amp STORAGE TANK AVE SEE NOTE BALL a d BALL n VALVE dh Nat d em 1 52 SC A ERE 2 25 DE ers A RI 11 2 HV ALL d Xf 7 1 BRONZE un CIRCULATING M z DRAIN VALVE T TANK TEMP a CONTROL 170 MAX SAME SIZE PIPE d AS COLD SUPPLY m BEFORE BRANCH TO 4 DANGER PRSE HEATER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES SEE WATER MUST BE IDENTICAL HEATERS TEMPERATURE CONTROL WARNING ON PAGES 17 amp 18 IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER SUPPLY SIZED OUTPUT ADD AN ANTI SCALD VALVE FOR HOT WATER MEET APPLICATION AND SUPPLIED TO FIXTURES CODE CONDITIONS MEDIUM TEMPERATURE THREE HEATERS HORIZONTAL STORAGE TANK HOT WATER TO FIXTURES PIPE RELIEF VALVE TO OPEN DRAIN TEMPERATURE TANK TEMPERATURE CONTROL SET RES eae AT DESIRED TEMPERATURE MAX 1709 CONTROL HEATER THERMOSTAT SET AT LEAST 5 170 A wis HIGHER inn D CAUTION IF BUILDING COLD WATER gt SUPPLY HAS BACK FLOW PREVENTER CHECK VALVE OR WATER EE SUBE METER WITH CHECK VALVE BEFOBEBHANCHTO ca PROVISIONS FOR THERMAL FIRST HEATER ML EXPANSION OF WATER IN THE HOT TR WATER SYSTEM MUST BE PROVIDED RETURN LINE FROM FIXTURES ie BALL CIRCULATING LOOP IF USED 1 1 2 CHECK INSTALL IN ACCORDANCE WITH
21. M E HOP LP SWITCH cure POE Dr ODE NO Pit ppa Fonemo AIF THERMOSTAT 5 Ea Jl gN Cg ul ls guys gr iB ary te Fr pt ary iz t Ir org g ar organa bag bad bag bad ie Es RN DP T ka ig git dii a STD WIRING 1 nS gi ng gi L i eboo n OPT L WIRING D D v ME FUSING PROVIDED OR AS REQ D 1 1 1 1 1 1 1 1 WHEN AMP DRAW EXCEEDS 120A HEATING ELEMENT S SMALL COMMERCIAL WIRE DIAGRAM 208 240V 3 1PH 15 3 1 PHASE CONVERSIONS In the case where the unit is phase convertible and it has only one contactor jumper wires provided must be added according to the phase of the supply voltage See the diagram below For single phase connection jumpers A C and B D must be added For three phase connection jumper B C must be added 3 1 PHASE CONTACTOR JUMPER CONFIGURATION JUMPER A C JUMPER B D JUMPER B C ELEMENT WIRES ELEMENT WIRES FIGURE 1 FIGURE 2 1 PHASE CONNECTION 3 PHASE CONNECTION De oS pe ee DEEP Em N i MARY j PILOT LT ghe X FMR RE amp SWITCH AUTO RESET SEC 120V ee a i 1 1 dom AR Ig dese WHITE tA il 1 i WARRICK MODEL 26B1AO 1 ELECT LOW WATER CUTOFF NCO 0 TRANSFORMER USED UE EN BLACK t ors o WHEN VOLTAGE 3 ze proa Meu EXCEEDS 120V roo G LLCO TM1 M
22. ND RED J 1 A 1 GREEN ERA SER a GER L TM J 3 2 dd HP SWITCH TAN TI TIME CLOCK i 2 neq 1 1 1 1 1 1 1 1 1 1 1 1 mw ep Eb CES pl LP SWITCH podboar Poa ba ba li ft a 1 at FUSES 1 Coa Ged teed weld Q N wav NO i i i i i T E A coco THERMOSTAT TES T m 1 1 1 1 1 1 1 1 1 1 1 1 9 9 8 9 O r i bd i NA NA R 1 dod 1 STD WIRING UE OX E 4RES 1 B WS DA EN NE di WIRING 1 1 L OR AS REQ D 1 Ix zd 9 AANA MADD p WHEN 4 R RAV HEATING ELEMENT S EXCEEDS 1208 SMALL COMMERCIAL WIRE DIAGRAM 208 240V 3PH STATE c aL PHASE PRIMARY enn Sees MAN RESET AUTO RESET i HI LIMIT HI LIMIT EQUIP GND BLACK T XU 27 2 ET M 120V SEC TERE ar D D bel ome uu BLACK E L WARRICK MODEL 26B1A0 ELECT LOW WATER CUTOFF H 1 ao aa eee olen ct e BLACK a xi gl DOOR los No aj alal sf INTERLOCK E T rete g Luco ud PE ur i OPT L RED 99990 9999 c GREEN amis GE ea 1 FOE TOE ea i t 4 HP SWITCH ra ra TIME CLOCK ned BABA GHA ruses 1 1 1 1 1 T 1 9 HEU
23. S SECTIONAL AREAS OF ALL INLETS AND HEATER OUTLETS AT LEAST EQUAL AREA OF NO 3 THEIR RESPECTIVE MAIN PIPING REVERSE RETURN PIPING SHOWN HEAT TRAP TO APPROXIMATELY b MID POINT OF HEATER FLOW REGULATING PLUG COCK CHE UT ity MUST BE IDENTICAL HEATERS EX COLD WATER SUPPLY SIZED TO MEET APPLICATION AND CODE CONDITIONS 12 ELECTRICAL 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 version of NFPA 70 The National Electrical Code which may be ordered from American National Standards Institute 1430 Broadway New York NY 10018 Ax warnina AN ELECTRICAL GROUND IS REQUIRED TO REDUCE RISK OF ELECTRIC SHOCK OR POSSIBLE ELECTROCUTION 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 Check the heater model and rating plate information against the characteristics of the branch circuit electrical supply DO NOT CONNECT THE HEATER AN IMPROPER SOURCE OF ELECTRICITY 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
24. SAFETY RELATED LABELS 4 DO OBTAIN NEW WARNING AND INSTRUCTION LABELS FROM A O SMITH FOR PLACEMENT ON THE BLANKET DIRECTLY OVER THE EXISTING LABELS 5 WATER AND OR CONDENSATE CAN COLLECT IN AN INSULATION BLANKET A O SMITH WILL NOT BE LIABLE FOR ANY RUST OR CORROSION DAMAGE CAUSED BY THE INSTALLATION OF INSULATION BLANKETS warning FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN SERIOUS PERSONAL INJURY OR DEATH EXTERNAL DAMAGE Do not operate the water heater until it has been fully checked out by a qualified service technician if the water heater Has been exposed to fire or damage Produces steam or unusually hot water If the water heater has been subject to flooding it must be replaced INSTALLATION 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 INVOLVED GENERAL The installation must conform to these instructions and the local code authority having jurisdiction Grounding and electrical wiring connected to the water heater must also conform to the latest version of the NATIONAL ELECTRICAL CODE and NFPA 70 Copies of these codes may be obtained from American National Standards Institute 1430 Broadway New York NY 10018 If your location requires the installation of the water heater to comply with National Sanitation Foundation requirements the heater must be seal
25. T TO 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 OF DAMAGE TO PERSONAL PROPERTY OR OTHER CONSEQUENTIAL DAMAGE THE WARRANTOR SHALL NOT BE LIABLE BY VIRTUE OF THIS WARRANTY OR OTHERWISE FOR DAMAGE TO ANY PERSONS OR PROPERTY WHETHER DIRECT OR INDIRECT AND WHETHER ARISING IN CONTRACT OR IN TORT a Some states do not allow the exclusion or limitation of incidental or consequential damage so the above limitations or exclusions may not apply to you b This warranty gives you specific legal rights and you 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 Code KEEP THIS WARRANTY AND MANUAL POSTED ADJACENT TO THE HEATER FOR FUTURE REFERENCE WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED 23 ProductPreservers REPLACEMENT PARTS LA Co 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
26. TER PIPE RELIEF VALVE TO OPEN DRAIN T TANK TEMPERATURE CONTROL SET AT DESIRED TEMPERATURE MAX 170 HEATER THERMOSTAT SET AT LEAST 5 HIGHER INSTALL IN ACCORDANCE WITH ALL LOCAL CODES BALL VALVE y CAUTION IF BUILDING COLD WATER SUPPLY HAS BACK FLOW PREVENTER CHECK VALVE OR WATER METER WITH CHECK VALVE PROVISIONS FOR THERMAL e EXPANSION OF WATER IN THE HOT Na WATER SYSTEM MUST BE PROVIDED HEAT TRAP APPROXIMATELY MIDPOINT OF HEATER BRANCH PIPING ALL HEATERS MUST BE SAME SIZE AND LENGTH FOR EQUAL FLOW THESE BRANCHES MAY BE SIZED UP TO 1 1 4 SO THAT CROSS SECTIONAL AREAS OF ALL INLETS AND OUTLETS AT LEAST EQUAL AREA OF THEIR RESPECTIVE MAIN PIPING REVERSE RETURN PIPING SHOWN ge RETURN LINE FROM FIXTURE CIRCULATING LOOP IF USED HOT WATER TO FIXTURES THERMOMETERS TRP RELIEF V LVE STORAGE TANK Ly or x Zh ec 5 11 2 E a CHECK VALVE T amp P RELIEF VALVE BAL f VALVE c GX 150 ALL BRONZE CIRCULATING PUMP f HEATER NO 1 FUSED DISCONNECT SWITCH FLOW REGULATING PLUG COCK COLD WATER SUPPLY SIZED TO MEET APPLICATION AND CODE CONDITIONS MUST BE IDENTICAL HEATERS 10 MEDIUM TEMPERATURE THREE HEATERS VERTICAL STORAGE TANK TEMPERATURE HOT WATER AND PRESSURE TO FIXTURES RELIEF VALVE THERMOMETER FUSED F
27. TING ELEMENT S 1 WARRICK MODEL 26B1A0 1 ELECT LOW WATER CUTOFF 1 p AIL S loo a r9 NO j INTERLOCK ae ico Zyl TM1 manoal Reset OP 1 PUSHBUTTON 4 PROBE GND U RED GREEN HP SWITCH TIME CLOCK 1 rn 4 LP SWITCH FUSES 1 NO T THERMOSTAT M 1 m Awaz STS 1 i t 0 R 0 1 STD WIRING 1 wy Lao 7A pru 222 22 OPT L WIRING y OR AS REQ D 1 FUSING PROVIDED WHEN AMP DRAW EXCEEDS 120A SMALL COMMERCIAL WIRE DIAGRAM 300 600V 3PH 17 OPERATION GENERAL Never operate the heating elements without being certain the water heater is filled with water and a temperature and pressure relief valve is installed in the relief valve opening FILLING Turn off the electrical disconnect switch 2 Close the water heater drain valve by turning knob to right clockwise 3 Open a nearby hot water faucet to permit the air in the System to escape 4 Fully open the cold water inlet 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 START UP and TEMPERATURE REGULATION START UP The following checks should be made by the installer when the heater is placed into operation for the first time 1 Open the hinged access door check all water and electrical connections for tightness Also check connections on top
28. TTOM OF TANK SAME SIZE PIPE m AS COLD SUPPLY TO HEATER VALVE HEATER 6 Wy 1 l HOT WATER MEDIUM TEMPERATURE ONE HEATER TO E os HORIZONTAL STORAGE TANK TANK TEMP CONTROL 170 F MAX CIRCULATING PUMP WIRING DIAGRAM LINE TEMPERATURE CONTROL CIRCULATING PUMP L2 120 AC NEUTRAL COLD WATER SUPPLY SIZED TO MEET APPLICATION AND CODE CONDITIONS A DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES SEE WATER TEMPERATURE CONTROL WARNING ON PAGES 17 amp 18 IF HIGHER PREHEAT TEMPERATURES ARE NECCESARY TO OBTAIN ADEQUATE BOOSTER OUTPUT ADD AN ANTI SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES PIPE RELIEF VALVE TO OPEN DRAIN TEMPERATURE CONTROL SET AT DESIRED TEMPERATURE MAX 170 HEATER THERMOSTAT SET AT LEAST 5 HIGHER INSTALL IN ACCORDANCE WITH ALL LOCAL CODES CAUTION IF BUILDING COLD WATER SUPPLY HAS A BACK FLOW PREVENTER CHECK VALVE OR WATER METER WITH CHECK VALVE PROVISIONS FOR THERMAL EXPANSION OF WATER IN THE HOT WATER SYSTEM MUST BE PROVIDED THERMOMETER TEMPERATURE AND PRESSURE RELIEF VALVE STORAGE TANK RETURN LINE FROM FIXTURE CIRCULATING LOOP IF USED P 58 BALL VALVE SAME SIZE PIPE AS COLD SUPPLY TO HEATER FUSED DISCONNECT APPROXIMATELY MID POINT OF HEATER DRAIN VALVE CHECK ies VALVE EF BALL 9 VALVE
29. VE n ma dyl ALL BRONZE a J CIRCULATING PUMP TEMPERATURE AND PRESSURE RELIEF VALVE 72 gt FLOW REGULATING IN 22 PLUG COCK 2 E ALL MANIFOLDING MUST BE EQUAL LENGTH HEATER NO 2 e S d MUST BE IDENTICAL HEATERS ONE OR TWO TEMPERATURE THREE HEATERS HOT WATER A RETURN LINE FROM CIRCULATING LOOP FUSED v Kw A4 FOR STORED TEMPERATURE WATER IF USED DISCONNECT SWITCH wi LINE MIXING VALVE APPLICATION FOR TWO TEMPERATURE SYSTEM TEMPERATURE AND PRESSURE RELIEF VALVE TEMPERATURE 553 PA CONTROL COLD 9 WATER va m a S j TURA Y ak 7Me CIRCULATING seh 14 nae SP PUMP A T CHECK N VALVE FLOW REGULAING 6 PLUG COCK HOT WATER TEMPERED WATER OUTLET OUTLET CHECK VALVE MIXING VALVE SNe CHECK VALVE ff ALL MANIFOLDING MUST BE EQUAL LENGTH CIRCULATING RETURN LINE CONNECTIONS TEMPERED WATER LOOP IF USED CONNECT TO POINT R HEATER NO 2 CAUTION IF BUILDING COLD WATER SUPPLY HAS A BACK FLOW PREVENTER CHECK VALVE OR WATER METER WITH CHECK VALVE PROVISIONS FOR THERMAL EXPANSION OF WATER IN THE HOT WATER SYSTEM MUST NOs PROVIDED PIPE TO OPEN DRAIN ae MUST BE IDENTICAL HEATERS INSTALL IN ACCORDANCE WITH ALL LOCAL CODES A DANGER
30. arranty shall apply only when the heater is used 1 at temperatures not exceeding the maximum setting of its thermostat at water pressure not exceeding the working pressure shown on the water heater when operated free from the damaging effects of uncontrolled water hammer when filled with potable water free to circulate at all times in a non corrosive and non contaminated atmosphere with factory approved anode s installed 7 in the United States its territories or possessions and Canada b Any accident to the water heater any misuse abuse including freezing or alteration of it any operation of it in a modified form any use of insulation blankets or any attempt to repair tank leaks will void this warranty This warranty is void if a device acting as backflow prevention device check valves etc is installed the cold water supply the heater is connected to unless an effective method of controlling thermal expansion is also installed at the heater s and operational at all times The relief valve installed on the heater is not an acceptable method 4 SERVICE AND REPAIR EXPENSES Under the limited warranty the warrantor will provide only a replacement water heater or part thereof The owner is responsible for all other costs Such costs may include but are not limited to a Labor charges for service removal repair or reinstallation of the water heater or any component part b Shipping delivery
31. ed to the floor so as to prevent seepage underneath the heater The following are recommended sealants that may be used on all types of flooring except concrete GE Silicone Seal RTV 120 103 108 and 109 DO NOT TEST ELECTRICAL SYSTEM BEFORE HEATER IS FILLED WITH WATER FOLLOW START UP PROCEDURE AS WRITTEN IN OPERATION SECTION OF THIS MANUAL The principal components of the heater are identified in figure 1 The model and rating plate on page 3 interprets certain markings into useful information Both of these references should be used to identify the heater its components and optional equipment LOCATION For proper installation the heater should be installed on a level surface LOCATE IT NEAR A FLOOR DRAIN THE HEATER SHOULD BE LOCATED IN AN AREA WHERE LEAKAGE FROM THE HEATER OR CONNECTIONS WILL NOT RESULT IN DAMAGE TO THE ADJACENT AREA OR TO LOWER FLOORS OF THE STRUCTURE WHEN SUCH LOCATIONS CANNOT BE AVOIDED A SUITABLE DRAIN PAN SHOULD BE INSTALLED UNDER THE HEATER Such pans should be fabricated with sides at least 2 deep with length and width at least 2 greater than the diameter of the heater and must be piped to an adequate drain Drain pans suitable for these heaters are available from your distributor or A O Smith Water Products Company Product Service Division 5621 W 115th St Alsip IL 60803 Locate the heater close to the point of major hot water usage and the power supply Try to make hot water piping a
32. emperatures Figure 1 shows the approximate time to burn relationship for normal adult skin Temperature Time to Produce 2nd amp 3rd Setting Degree Burns on Adult Skin 180 F 82 C Nearly instantaneous 170 F 77 C Nearly instantaneous 160 F 71 C About 1 2 second 150 F 65 C About 1 1 2 seconds 140 F 60 C Less than 5 seconds 130 54 C About 30 seconds 120 F 49 C More than 5 minutes FIGURE 1 Valves for reducing point of use temperature by mixing cold and hot water are available Also available are inexpensive devices that attach to faucets to limit hot water temperatures Contact a licensed plumber or the local plumbing authority The thermostat factory setting is 130 F The dial is adjustable through a range of 95 to 194 The thermostat is behind the front access door TURN OFF THE ELECTRICAL DISCONNECT SWITCH BEFORE OPENING DOOR It is suggested the thermostat be turned to the lowest setting which satisfies the hot water requirements of the system This helps minimize water scale formations on the heating elements The thermostat contacts close on about 6 F not adjustable drop in water temperature Where multiple thermostats are used they may be all set at the same temperature or 2 to 4 F apart to achieve step control The bottom thermostat is set the hottest and top thermostat the coolest Always close the front access door after making a temperature adjustment Turn on electr
33. ibutors Refer to Yellow Pages for where to call or contact the A O Smith Water Products Company Product Service Division 5621 W 115th Street Alsip IL 60803 1 800 433 2545 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 ProductPreservers REPLACEMENT PARTS 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 ANODE Drain valve leakage could be from the valve itself Either correct the problem or replace the valve 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 Where possible remove or lift top cover to examine threads of fittings installed into tank for evidence of leakage Correct fitting leaks as necessary 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 portion enter
34. icity DRAINING 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 Close the supply water inlet valve to heater MAINTENANCE GENERAL Periodically the drain valve should be opened and the water allowed to run until it flows clean This will help to prevent sediment build up 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 A CAUTION THE WATER PASSING OUT OF THE VALVE DURING THIS CHECKING OPERATION MAY BE EXTREMELY HOT Water heater maintenance includes periodic tank flushing and cleaning and removal of lime scale from the heating elements Interval Monthly Component Operation Flushing Sediment Removal Lime Scale Removal Required Tank As needed As needed UN Lime delimer and element gaskets Part No 5109 Elements Tank flushing should be performed in accordance with the above schedule Tank sediment removal and element lime scale removal must be performed when needed as determined by periodic inspections Following are the instructions for performing recommended maintenance FLUSHING The water heater drain valve should be opened o
35. ments The control circuit wiring is 14 AWG rated 600 volts 105 C A low water cutoff switch is available as an optional safety device to protect the elements from damage due to lack of water in the heater POWER CIRCUIT Power circuit wiring is rated 600 volts 75 C WIRING DIAGRAMS The following wiring diagrams are included in this manual to show typical arrangement of electrical components in the control and power circuits by voltage and phase characteristics They are to be used as a reference by the installer or servicer in performing their work An actual diagram of the water heater wiring is furnished with the heater Full Load Current In Amperes Single Phase Three Phase 1 1 1 1 1 Li 1 18 000 ar or 2 15 000 5i 2 3 15 000 3 3 18 000 2 60 4 15000 4 4 pomi 208V models use one additional immersion heater Available on 50 gallon models or larger Fach immersion heater contains three electric elements 208 240V 3PH 1 qq PILOT LT MAN RESET epp PRIMARY X EMR SEC amp SWITCH AUTO RESET 120V SEC FUSE HI LIMIT BLACK O 4 7 EQUIP WARRICK MODEL 268150 02 GND ELECT LOW WATER CUTOFF NC O 1 COM 5 9 Er ON mE Br 3 GND DOOR oe 01 GREEN Ji INTERLOCK ro otf 6 LLCO 2 2 1 MANDAL RESETE 119 J Seen DM tm NT pue P 1 PUSHBUTTON L PROBE 9 G
36. n 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 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 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 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 w
37. nce a month to help prevent sediment buildup on the tank bottom 1 Turn off the electrical disconnect switch 2 Attach hose to outlet opening of drain valve and direct end to drain Open the drain valve by turning the knob to the left counterclockwise Allow water to flow until it runs clean If water does not flow from opened drain valve follow instructions for sediment removal When finished flushing Close heater drain valve and remove hose 19 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 extended shutdown it is suggested the drain valve be left open during this period The hose may be removed e Follow FILLING instructions when restoring hot water service Turn on electricity SEDIMENT REMOVAL Water borne impurities consist of fine particles of soil and sand which settle out and form a layer of sediment on the bottom of the tank In time if not removed the level of sediment might reach the heating elements and cause their failure For convenience sediment removal and element lime scale removal should be performed at the same time as follows LIME SCALE REMOVAL Lime scale accumulations on the heating elements is a normal condition common to all immersion type elements Factors which affect the amount of this formation are 1 Amount of hot water used As the volume of
38. nd branch circuit wiring as short as possible Insulate hot and cold water piping where heat loss and condensation may be a problem THE HEATER SHOULD NOT BE LOCATED IN AN AREA WHERE IT WILL BE SUBJECT TO FREEZING Suggested clearances from adjacent surfaces are 18 inches in front for access to the controls and elements and 12 inches from top The heater may be installed on or against combustible surfaces CONNECTIONS The heater water inlet is located on the side of the heater near the bottom The heater outlet is located at the top of the heater Piping and wiring diagrams are included in this manual RELIEF DEVICES An unplugged 3 4 relief valve opening is provided for installing temperature and pressure relief valve CAUTION TO REDUCE THE RISK OF EXCESSIVE PRESSURES AND TEMPERATURE 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 equipment or materials as meeting the requirements for relief valve devices for hot water supply systems ANSI 721 22 latest version 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 THE OPENING PROVIDED AND MARKED FOR THIS PURPOSE IN THE WATER HEATER AND ORIENT
39. s 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 Water on side of the tank may be condensation due to the panel or insulation not being in place Water leaks at the elements may be due to 1 Defective element which leaks at terminals or through flange Replace element 2 Loose element gasket leak Flange type Tighten screws with wrench If leak continues remove element and discard gasket Clean gasket seating areas and reinstall element with new gasket NOTE Part No 5288 scale cleaning replacement screws available where threads have become rusted or damaged preventing tightening Condensation and dripping may appear on pipes when cold water temperature is low Pipe fitting may be leaking 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 replace the heater until a 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 seepage should also be suspected until proven otherwise 22 MODEL DSE LIMITED WARRANTY A O Smith Corporation the warrantor extends the following LIMITED WARRANTY to the owner of this water heater 1 THE TANK If the glass lined tank i
40. ter Circuits ore etienne 14 Control Circuit kk keke 14 Power Circuit 2 14 Wiring Diagram 15 17 OPERATION ICE 17 sa nei Eye da 17 Start UU ks Ose ian rena s n aka an OY 17 Temperature Regulation 17 18 Draining 18 MAINTENANCE 18 Flushing utente 18 Sediment 18 Lime Scale 18 19 GIeckliSE coire erem er ein 19 20 Replacement Parts 20 LEAKAGE CHECKPOINTS 21 LIMITED WARRANTY 22 MODEL amp RATING PLATE ARIETE IE JCTS SMITH W EH PHI Po Bc SEATTLE WASH 53124 AUTOMATIC ELECTRIC WATER HEAT RS CAT HD SERIAL Em LLL HO ELEWENTS 1 73 Moca Auer UITABLE NSF a TOTAL WATTS HA RENT CHLY FOR SUPPL WIRE 8 GETTING TO KNOW YOUR WATER HEATER Below is an illustration of the water heater with its features called out The text of this manual will refer to the items shown OUTLET TOP COVER PLUGS b e 3 4 NPT RELIEF VALVE OPENING NOTES 3 4 DSE 5 THRU 50 MODELS 1 1 4 DSE 65 THRU 120 MODELS ALOW WATER CUTOFF SWITCH IS AVAILABLE AS AN OPTIONAL ud SAFETY DEVICE TO PROTECT THE EL
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