A.O. Smith DSE-5 THRU DSE-120 manual

1 • Installation • Operation • Maintenance • Checklist • Limited W arranty CAUTION TEXT PRINTED OR OUTLINED IN RED CONT AINS INFORMA TION RELA TIVE TO YOUR SAFETY . PLEASE READ THOROUGHL Y BEFORE INST ALLING AND USING THIS APPLIANCE. KEEP THIS MANUAL WITH THE HEA TER FOR FUTURE REFERENCE. WHENEVER MAINTENANCE ADJUSTMENTS OR SER VICE IS RE[...]

2 ST ANDARD BTU/ 3 0 ° 4 0 ° 5 0 ° 6 0 ° 7 0 ° 8 0 ° 9 0 ° 100° 1 10° 120° 130° 140° KW I N PU T HOUR 3 10,239 41 31 24 20 17 15 13 12 1 1 10 10 9 6 20,478 82 62 49 41 35 31 27 25 22 21 1 9 18 9 30,717 123 92 74 6 2 53 46 41 37 34 31 28 26 12 40,956 164 123 98 82 70 61 55 49 45 41 38 35 15 51,195 205 154 123 102 88 77 68 61 56 51 47 44 [...]

3 CONTENTS P AGE ROUGH-IN-DIMENSIONS . . . . . . . . . . . . . . . . ...................... 2 RECOVERY CAP ACITY ....................................... 2 FOREWORD ......................................................... 3 APPROV ALS ....................................................... 3 MODEL & RA TING PLA TE ..............................[...]

4 GETTING T O KNOW YOUR W A TER HEA TER Below is an illustration of the water heater with its features called out. The text of this manual will refer to the items shown. FIGURE 1[...]

5 GENERAL SAFETY INFORMA TION INSULA TION 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. Y our A.O. Smith water heate[...]

6 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 TEMPERA TURE IN THIS W A TER HEA TER INST ALL TEMPERA TURE AND PRESSURE PROTECTIVE EQUIPMENT REQUIRED BY LOCAL CODES but not less than a combination temperature and pressu[...]

7 PIPING DIAGRAM ONE OR TWO TEMPERA TURE - ONE HEA TER ONE OR TWO TEMPERA TURE - TWO HEA TER DANGER : TEMPERA TURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERA TURE A T FIXTURES. SEE WA TER TEMPERA TURE CONTROL WARNING ON P AGES 17 & 18. IF HIGHER PREHEA T TEMPERA TURES ARE NECESSARY T O OBTAIN ADEQUA TE BOOSTER OUTPUT , ADD AN ANTI-SCALD V A L V[...]

8 ONE OR TWO TEMPERA TURE - THREE HEA TERS ONE OR TWO TEMPERA TURE - FOUR HEA TERS CAUTION: IF BUILDING COLD W A TER SUPPL Y HAS A BACK-FLOW PREVENTER, CHECK V AL VE OR W A TER METER WITH CHECK V AL VE, PROVISIONS FOR THERMAL EXP ANSION OF W A TER IN THE HOT W A TER SYSTEM MUST BE PROVIDED. *PIPE TO OPEN DRAIN. INST ALL IN ACCORDANCE WITH ALL LOCAL[...]

9 MEDIUM TEMPERA TURE - ONE HEA TER VERTICAL STORAGE T ANK MEDIUM TEMPERA TURE - ONE HEA TER HORIZONT AL STORAGE T ANK *PIPE RELIEF V AL VE TO OPEN DRAIN. †T ANK TEMPERA TURE CONTROL SET A T DESIRED TEMPERA TURE (MAX. 170°). HEA TER THERMOST A T SET A T LEAST 5° HIGHER. INST ALL IN ACCORDANCE WITH ALL LOCAL CODES. CAUTION: IF BUILDING COLD W A [...]

10 MEDIUM TEMPERA TURE - TWO HEA TERS HORIZONT AL STORAGE T ANK MEDIUM TEMPERA TURE - TWO HEA TERS VERTICAL ST ORAGE T ANK RETURN LINE FROM FIXTURE CIRCULA TING LOOP (IF USED) SHOULD CONNECT TO ANY OPENING NEAR BOTTOM OF T ANK. * PIPE RELIEF V A L VE TO OPEN DRAIN. † T ANK TEMPERA TURE CONTROL SET A T DESIRED TEMPERA TURE (MAX. 170°). HEA TER TH[...]

11 MEDIUM TEMPERA TURE - THREE HEA TERS HORIZONT AL ST ORAGE T ANK MEDIUM TEMPERA TURE - THREE HEA TERS VERTICAL STORAGE T ANK * PIPE RELIEF V AL VE TO OPEN DRAIN † T ANK TEMPERA TURE CONTROL SET A T DESIRED TEMPERA TURE (MAX. 170°). HEA TER THERMOST A T SET A T LEAST 5° HIGHER. CAUTION: IF BUILDING COLD WA TER SUPPL Y HAS A BACK-FLOW PREVENTER[...]

12 MEDIUM TEMPERA TURE - FOUR HEA TERS HORIZONT AL STORAGE T ANK MEDIUM TEMPERA TURE - FOUR HEA TERS VERTICAL STORAGE T ANK CAUTION: IF BUILDING COLD WA TER SUPPL Y HAS A BACK-FLOW PREVENTER, CHECK V A LVE OR W A TER METER WITH CHECK V AL VE, PROVISIONS FOR THERMAL EXP ANSION OF W A TER IN THE HOT W A TER SYSTEM MUST BE PROVIDED. * PIPE RELIEF V A [...]

13 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 NFP A-70, The National Electrical Code which may be ordered from: American National Standards Institute, 1430 Broadway ,[...]

14 AMPERAGE T ABLE/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[...]

15 SMALL COMMERCIAL WIRE DIAGRAM 208-240V / 3PH SMALL COMMERCIAL WIRE DIAGRAM 208-240V / 3-1PH[...]

16 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 CONT ACTO[...]

17 SMALL COMMERCIAL WIRE DIAGRAM SINGLE PHASE SMALL COMMERCIAL WIRE DIAGRAM 300-600V / 3PH[...]

18 OPERA TION 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 1. T urn off the electrical disconnect switch. 2. Close the water heater drain valve by turning knob to right (clockwise). 3. Open a near[...]

19 MAINTENANCE Always close the front access door after making a temperature adjustment. T urn on electricity . 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. T urn off the electrical disconnect switch. 2. Close the[...]

20 5. Remove the bolts from each element. 6. Remove the elements from the openings. • 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. Do not permit deli[...]

21 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. • An expansion tank of suitable pressure and provision to avoid water logging. • Re[...]

22 LEAKAGE CHECKPOINTS INSTRUCTIONS: USE THIS ILLUSTRA TION AS A GUIDE WHEN CHECKING FOR SOURCES OF W A TER LEAKAGE. YOU OR YOUR DEALER MA Y BE ABLE TO CORRECT WHA T APPEARS T O BE A PROBLEM. Water on side of the tank may be condensation due to the panel or insulation not being in place. Relief valve operation and leakage may be due to water expans[...]

23 MODEL DSE LIMITED W ARRANTY A.O. Smith Corporation, the warrantor , extends the following LIMITED W ARRANTY to the owner of this water heater: 1. THE T ANK 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 aft[...]

24 5621 W . 1 15TH STREET , ALSIP , IL 60803 Phone: 800-433-2545 Fax: 800-433-2515 w w w.hotwater .com E-Mail: parts@hotwater .com REPLACEMENT P ARTS[...]