A.O. Smith DVE - Manual

5 Installation REQUIRED ABILITY INSTALLATION OR SERVICE OF THIS WATER HEATERREQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSEDTRADESMAN IN THE FIELD INVOLVED. PLUMBING ANDELECTRICAL WORK ARE INVOLVED. GENERAL The installation must conform to these instructions and the localcode authority having juris...

6 The pressure setting of the relief valve should not exceed thep r e s s u r e c a p a c i t y o f a n y c o m p o n e n t i n t h e s y s t e m . T h etemperature setting of the relief valve should not exceed 210°F. An unplugged 3/4" relief valve opening is provided for installingtemperature a...

7 Piping Diagrams ONE TEMPERATURE WITH CIRCULATING LOOP INSERT B VACUUM RELIEF VALVE. INSTALL PER LOCAL CODES. CAUTION: IF BUILDING COLD WATER SUPPLY HAS A BACK-FLOW PREVENTER, CHECK VALVE OR WATER METER WITHCHECK VALVE. PROVISIONS FOR THERMAL EXPANSION OFWATER IN THE HOT WATER SYSTEM MUST BE PROVID...

10 ONE TEMPERATURE ONE HEATER VERTICAL STORAGE TANK FORCED CIRCULATION WITHOUT BUILDING RECIRCULATION TWO TEMPERATURE WITH MIXING VALVE AND CIRCULATING LOOP INSERT B VACUUM RELIEF VALVE. INSTALL PER LOCAL CODES. TWO TEMPERATURE WITH MIXING VALVE CAUTION: IF BUILDING COLD WATER SUPPLY HAS A BACK-FLOW...

14 MANIFOLD KITS ALL DIMENSIONS IN INCHES. TWO HEATERS 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 HEATERS Part Model Number H W D A DRE/DVE-5...

15 BRANCH CIRCUIT The branch circuit wire and fuse size should be establishedthrough reference to the current version of the National ElectricalCode or any other locally approved source in conjunction withthe heater amperage rating. Branch circuit wires should have atemperature rating no less than 7...

16 Full Load Current in Amperes KW Number of Element Single Phase Three Phase No. of No. of Input Elements Wattage 208V 240V 277V 480V 208V 240V 480V Thermostats 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 ...

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

20 HEATER CIRCUITS—DRE MODELS The water heater's electrical components are pictured and identified on page2. The following describes the heater circuits and includes wiring diagrams. Allheater circuits are designed for 60/50 hertz alternating current. The DRE circuit wiring is 12 AWG, AWM, or TEW ty...

22 Operation GENERAL Never turn on power to the water heater without being certain thewater heater is filled with water, and a temperature and pressurerelief valve is installed in the relief valve opening. DO NOT TEST ELECTRICAL SYSTEM BEFORE HEATER ISFILLED WITH WATER. FOLLOW FILLING AND START-UPIN...

23 MAINTENANCE SCHEDULE Component Operation Interval Required Tank Flushing Periodically Un•Lime ® Elements Lime Scale As needed delimer & Removal element gaskets, Part Anode Inspect As needed Tank flushing should be performed in accordance with the aboveschedule. Tank sediment removal and eleme...

24 12. Attach element wires to connection points from which they were removed. 13. Follow FILLING instructions to restore hot water service. • Check for water leaks around elements and proper operationwhen heater is filled. • Close the front panel. CHECKLIST Before calling for service, check the fol...

25 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. Where possible, remove or lift top cover toexamine threads of fittings installed into tank forevidence of leakage....

26 A. O. Smith Corporation, the warrantor, extends the following LIMITED WARRANTY to the owner of this water heater: 1. THE TANKIf the glass-lined tank in this water heater shall prove upon examination by the warrantor to have leaked due to natural corrosion from potablewater therein, during the fir...