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A.O. Smith DVE manual

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Table of contents for the manual

  • Page 1

    1 COMMERCIAL ELECTRIC W A TER HEA TERS CAUTION TEXT PRINTED OR UNDERLINED IN RED CONT AINS INFORMA TION RELA TIVE TO YOUR SAFETY . PLEASE READ THOROUGHL Y BEFORE A TTEMPTING ANY CONVERSION. PRINTED IN U.S.A. 0906 P ART NO. 196674-001 A DIVISION OF A.O. SMITH CORPORA TION MCBEE, SOUTH CAROLINA ww w .hotwater .com Models DRE & DVE - 52/80/120 •[...]

  • Page 2

    2 Rough-in-Dimensions Model Number T ank Cap acity in Gallons A B Inlet/Outlet DRE/DVE-52 50 55 1/4 21 3/4 1 1/4 DRE/DVE-80 80 59 1/2 25 1/4 1 1/4 DRE/DVE-120 1 19 62 1/4 29 1/2 1 1/4 Get to know your water heater[...]

  • Page 3

    3 Contents Page ROUGH-IN-DIMENSIONS ....................................... 2 GET TO KNOW YOUR W ATER HEA TER ............... 2 RECOVERY CAP ACITY ........................................... 3 APPROV ALS ............................................................ 3 MODEL AND RA TING PLA TE .................................. 4 FOREWORD ............[...]

  • Page 4

    4 Model and Rating 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 THA T ALL W A TER PIPING AND THE ELECTRICAL WIRING BE INST ALLED AND CONNECTED AS SHOWN IN THE DIAGRAMS. Particular attention should be g[...]

  • Page 5

    5 Inst allation REQUIRED ABILITY INST ALLA TION OR SERVICE OF THIS W A TER HEA TER REQUIRES ABILITY EQUIV ALENT TO THA T OF A LICENSED TRADESMAN IN THE FIELD INVOL VED. PLUMBING AND ELECTRICAL WORK ARE INVOL VED. GENERAL The installation must conform to these instructions and the local code authority having jurisdiction. Grounding and electrical wi[...]

  • Page 6

    6 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°F . An unplugged 3/4" relief valve opening is provided for installing temperature and pressure relief valve. TEMPERA TURE LIMITING CONTROL(S) Both the DVE and DRE [...]

  • Page 7

    7 Piping Diagrams ONE TEMPERA TURE WITH CIRCULA TING LOOP INSERT B V ACUUM RELIEF V AL VE. INST ALL PER LOCAL CODES. CAUTION: IF BUILDING COLD W ATER SUPPL Y HAS A BACK- FLOW PREVENTER, CHECK V A L VE OR WA TER METER WITH CHECK V A L VE. PROVISIONS FOR THERMAL EXP ANSION OF W A TER IN THE HOT W A TER SYSTEM MUST BE PROVIDED. *PIPE T O OPEN DRAIN IN[...]

  • Page 8

    8 INSER T B V ACUUM RELIEF V AL VE. INST ALL PER LOCAL CODES. DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE TEMPERA TURE A T FIXTURES. SEE WA TER TEMPERA TURE CONTROL WARNING ON P AGE 6. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY T O O BTAIN ADEQUATE BOOSTER OUTPUT , A DD AN ANTI-SCALD V AL VE FOR HOT WA TER SUPPLIED TO FIXTURES.[...]

  • Page 9

    9 INSER T B V ACUUM RELIEF V AL VE. INST ALL PER LOCAL CODES. DANGER TEMPERA TURE SETTING SHOULD NOT EXCEED SAFE TEMPERA TURE AT FIXTURES. SEE W A TER TEMPERATURE CONTROL WARNING ON P AGE 6. IF HIGHER PREHEAT TEMPERA TURES ARE NECESSARY TO OBT AIN ADEQUA TE BOOSTER OUTPUT , ADD AN ANTI-SCALD VA LVE FOR HOT WA TER SUPPLIED T O FIXTURES.[...]

  • Page 10

    10 ONE TEMPERA TURE ONE HEA TER VERTICAL ST ORAGE T ANK FORCED CIRCULA TION WITHOUT BUILDING RECIRCULA TION TWO TEMPERA TURE WITH MIXING V AL VE AND CIRCULA TING LOOP INSER T B V ACUUM RELIEF V ALVE. INST ALL PER LOCAL CODES. TWO TEMPERA TURE WITH MIXING V AL VE CAUTION: IF BUILDING COLD W A TER SUPPL Y HAS A BACK-FLOW PREVENTER, CHECK V A L VE OR [...]

  • Page 11

    11 INSER T B V ACUUM RELIEF V ALVE. INST ALL PER LOCAL CODES. DANGER TEMPERA TURE SETTING SHOULD NOT EXCEED SAFE TEMPERA TURE A T FIXTURES. SEE WA TER TEMPERA TURE CONTROL WARNING ON P AGE 6. IF HIGHER PREHEA T TEMPERA TURES ARE NECESSAR Y TO OBT AIN ADEQUA TE BOOSTER OUTPUT , ADD A N ANTI-SCALD VAL VE FOR HOT W A TER SUPPLIED TO FIXTURES.[...]

  • Page 12

    12 DANGER TEMPERA TURE SETTING SHOULD NOT EXCEED SAFE TEMPERA TURE A T FIXTURES. SEE WA TER TEMPERA TURE CONTROL WARNING ON P AGE 6. IF HIGHER PREHEA T TEMPERA TURES ARE NECESSAR Y TO OBT AIN ADEQUA TE BOOSTER OUTPUT , ADD A N ANTI-SCALD VAL VE FOR HOT W A TER SUPPLIED TO FIXTURES. INSER T B V ACUUM RELIEF V AL VE. INST ALL PER LOCAL CODES.[...]

  • Page 13

    13 INSER T B V ACUUM RELIEF V AL VE. INST ALL PER LOCAL CODES. DANGER TEMPERA TURE SETTING SHOULD NOT EXCEED SAFE TEMPERA TURE A T FIXTURES. SEE WA TER TEMPERA TURE CONTROL WARNING ON P AGE 6. IF HIGHER PREHEA T TEMPERA TURES ARE NECESSAR Y TO OBT AIN ADEQUA TE BOOSTER OUTPUT , ADD A N ANTI-SCALD VAL VE FOR HOT W A TER SUPPLIED TO FIXTURES.[...]

  • Page 14

    14 MANIFOLD KITS ALL DIMENSIONS IN INCHES. TWO HEA TERS Part Model Number H W D A DRE/DVE-52 9003429 66 1/4 56 3/4 27 1/4 13 1/4 DRE/DVE-80 9003429 70 1/2 60 1/4 31 1/4 9 3/4 DRE/DVE-120 9003429 73 1/4 64 1/2 35 3/4 5 1/2 Inlet and outlet size — 1 1/2 THREE HEA TERS Part Model Number H W D A DRE/DVE-52 9003430 66 1/4 91 3/4 27 1/4 13 1/4 DRE/DVE-[...]

  • Page 15

    15 BRANCH CIRCUIT The branch circuit wire and fuse size should be established through reference to the current version of the National Electrical Code or any other locally approved source in conjunction with the heater amperage rating. Branch circuit wires should have a temperature rating no less than 75°C. For convenience, portions of the wire si[...]

  • Page 16

    16 Full Load Current in Amperes KW Number of Element Single Phase Three Phase No. of No. of Input Elements W attage 208V 240V 277V 480V 208V 240V 480V Thermostat s Fuses 6 2000 28.8 25.0 21.7 12.5 16.7 14.4 7.2 9 3000 43.3 37.5 32.5 18.8 25.0 21.7 10.8 12 3 4000 57.7 50.0 43.3 25.0 33.3 28.9 14.4 3 6 13.5 4500 64.9 56.3 48.7 28.1 37.5 32.5 16.2 15 [...]

  • Page 17

    17 DVE CONTROL CIRCUIT DIAGRAMS[...]

  • Page 18

    18 POWER CIRCUIT The power circuit wiring is 12 Awg. AWM or TEW type, rated 600 volts, 105°C. Power circuit fusing consists of three 30 amp class G fuses for each contactor . See wiring diagrams. Do not substitute fuses of a different rating. DVE POWER CIRCUIT DIAGRAMS THREE ELEMENTS - SINGLE AND THREE PHASE SIX ELEMENTS - SINGLE AND THREE PHASE[...]

  • Page 19

    19 CONVERSION TO SINGLE PHASE When the heater is shipped for connection to a three-phase electrical service, it may be connected to a single-phase electrical service of the same voltage by: 1. Disconnect blue wires and yellow wires from terminal L3. 2. Reconnect all blue wires to terminal L1 (with black wires). 3. Reconnect all yellow wires to term[...]

  • Page 20

    20 HEA TER CIRCUITS—DRE MODELS The water heater's electrical components are pictured and identified on pa ge 2. The following describes the heater circuits and includes wiring diagrams. All heater circuits are designed for 60/50 hertz alternating current. The DRE circuit wiring is 12 A WG , AWM, or TEW type, rated 600 volts, 105°C. FUSING F[...]

  • Page 21

    21 CONVERSION TO SINGLE PHASE When the heater is shipped for connection to a three-phase electrical service, it may be connected to a single-phase electrical service of the same voltage by: 1. Disconnect blue wires and yellow wires from terminal L3. 2. Reconnect all blue wires to terminal L1 (with black wires). 3. Reconnect all yellow wires to term[...]

  • Page 22

    22 Operation GENERAL 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 HEA TER IS FILLED WITH W A TER. FOLLOW FILLING AND ST AR T -UP INSTRUCTIONS IN OPERA TION SECTION. FILLI[...]

  • Page 23

    23 MAINTENANCE SCHEDULE Component Operation Interval Required T ank Flushing Periodically Un•Lime ® Element s Lime Scale As needed delimer & Removal element gaskets, Part Anode Inspect As needed T ank flushing should be performed in accordance with the above schedule. T ank sediment removal and element lime scale removal must be performed as[...]

  • Page 24

    24 12. Attach element wires to connection point s from which they were removed. 13. Follow FILLING instructions to restore hot water service. • Check for water leaks around elements and proper operation when heater is filled. • Close the front panel. CHECKLIST Before calling for service, check the following points to see if the cause of trouble[...]

  • Page 25

    25 Leakage Checkpoint s 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 TO BE A PROBLEM. Where possible, remove or lift top cover to examine threads of fittings installed into tank for evidence of leakage. Correct fitting leaks as necessary . Reli[...]

  • Page 26

    26 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 corros ion from potable water therein, during the first THREE years after initial installation, th[...]

  • Page 27

    27[...]

  • Page 28

    28 McBee, South Carolina 29101 Phone: 1-800-527-1953 Fax: 800-433-2515 w w w .hotwater .com e-mail: p ar ts@hotwater .com[...]