A.O. Smith Dve-52/80/120 - Manual

5 dIMensIons and capacItIes data Model number tank capacity in Gallons (liters) a - Inches (mm) B - Inches (mm) c - Inches (mm) Inlet/outlet DRE/DVE-52 50 (189.3) 55 3/4 (1416) 21 3/4 (552) 27 (685) 1 1/4 DRE/DVE-80 80 (302.8) 60 1/4 (1350) 25 1/2 (648) 31 (787) 1 1/4 DRE/DVE-120 119 (450.5) 62 1/4 ...

7 features and coMponents electronIc control Models fIGure 1

8 features and coMponents surface Mount control Models fIGure 2

9 facts to consIder aBout the locatIon Carefully choose a location for the new water heater. The placement is a very important consideration for the safety of the occupants in the building and for the most economical use of the appliance. Whether replacing an old water heater or putting the water he...

10 InstallatIon reQuIred aBIlIty Installation and service of this water heater requires ability equivalent to that of a qualified 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 authorit...

12 electrIcal 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 current editions of the National Electrical Code, NFPA 70 or th...

14 ccB (central control Board) cIrcuIt Board control cIrcuIt dIaGraM - electronIc control Models fIGure 3. wIrInG dIaGraMs

15 dIaGraM 1. wIrInG dIaGraMs power cIrcuIt dIaGraMs - electronIc control Models The water heater’s electrical components are pictured and identified on page 7. The following describes the heater circuits and includes wiring diagrams. All heater circuits are designed for 60/50 hertz alternating curr...

16 wIrInG dIaGraMs nIne eleMent - sInGle and three phase 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 ...

17 wIrInG dIaGraMs power cIrcuIt dIaGraMs - surface Mount control Models The water heater’s electrical components are pictured and identified on page 8. The following describes the heater circuits and includes wiring diagrams. All heater circuits are designed for 60/50 hertz alternating current. The...

19 operatIon General Refer to the Features and Components section of this manual (pages 7 & 8) 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 press...

20 hIGh teMperature lIMIt controls (eco) Both the ELECTRONIC CONTROL and SURFACE MOUNT CONTROL model water heaters are equipped with one or more ECO (energy cut off) non adjustable high temperature limit control(s). An ECO is a normally closed switch that opens (activates) on a rise in temperature. ...

21 therMostat settInGs - electronIc controls These models are equipped with an electronic control system. The control system senses temperature from a factory installed Immersion Temperature Probe (see Figure 1). The “Operating Set Point” is adjusted to control water temperature. This is an adjustab...

23 teMperatures Menu operating set point User adjustable setting 90°F to 190°F range; factory default is 120°F. When the water temperature sensed by the control system from the immersion Temperature Probe reaches the Operating Set Point the control system will end the heating cycle. A call for heat ...

24 differential settings Adjustable user setting(s) 1°F to 20° range; factory default is 2°F. The water heaters covered in this Instruction Manual will have 3, 6 or 9 heating elements. Each group of 3 heating elements is one “Bank” of heating elements. Heating elements are energized in Banks of 3. E...

25 heater status Menu This menu displays non adjustable operational information. This menu contains more information that can be displayed on one screen of the LCD display. Use the Up & Down Buttons to navigate to the bottom of this menu. top of Menu Bottom of Menu status Displays the current Op...

26 “Normal Operation All Day” - “Economy Mode All Day” and “Normal Operation Between.” Only one Operating Mode can be active, the factory default is Normal Operation All Day. Normal Operation All Day: When this operating mode is active the normal Operating Set Point is used for the entire day. Econo...

29 alarM output setup Menu Permits user to set the condition (from a list of options) for when the CCB’s integral alarm output relay will be energized. Alarm relay connections (common, normally open, normally closed) are located on the J3 terminal strip on the CCB. Alarm output relay contacts are ca...

31 restore factory defaults actIon dIsplay From the Main Menu use the Up/Down buttons to select (highlight in black) the “Restore Factory Defaults” menu. Press the Operational Button underneath “SELECT.” The Restore Factory Defaults menu will be displayed. From the Restore Factory Defaults menu pres...

32 its diameter is 3/8” (1 cm) of an inch, or annually which ever is first. Aggressive, very hot and softened water causes rapid consumption of the anode requiring frequent inspections. Call the toll free number on the back cover of this manual for information on obtaining replacement anode rods. Ma...

33 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 restore hot water service. See Figures 1 and 2 in this manual to...

34 leakaGe checkpoInts INSTRUCTIONS: USE THIS ILLUSTRATION AS A GUIDE WHEN CHECKING FOR SOURCES OF WATER LEAKAGE. 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...

35 pIpInG dIaGraMs one teMperature wIth cIrculatInG loop Insert B VacuuM relIef ValVe. Install per local codes. *pIpe to open draIn Install In accordance wIth all local codes.

38 pIpInG dIaGraMs Insert B VacuuM relIef ValVe. Install per local codes. one teMperature one heater VertIcal storaGe tank forced cIrculatIon wIthout BuIldInG recIrculatIon two teMperature wIth MIXInG ValVe and cIrculatInG loop two teMperature wIth MIXInG ValVe *pIpe to open draIn Install In accorda...

39 pIpInG dIaGraMs two heaters wIth horIZontal storaGe tank wIth or wIthout BuIldInG recIrculatIon Insert B VacuuM relIef ValVe. Install per local codes.

40 pIpInG dIaGraMs three heaters wIth horIZontal storaGe tank wIth or wIthout BuIldInG recIrculatIon three heaters wIth VertIcal storaGe tank wIth or wIthout BuIldInG recIrculatIon Insert B VacuuM relIef ValVe. Install per local codes.

41 pIpInG dIaGraMs four heaters wIth VertIcal storaGe tank wIth or wIthout BuIldInG recIrculatIon four heaters wIth horIZontal storaGe tank wIth or wIthout BuIldInG recIrculatIon Insert B VacuuM relIef ValVe. Install per local codes.

42 pIpInG dIaGraMs ManIfold kIts ALL DIMENSIONS IN INCHES ManIfold kIts two heaters tank capacity (gallons) part number h w d a 52 9003429205 66 1/4 56 3/4 27 1/4 13 1/4 80 9003429205 70 1/2 60 1/4 31 1/4 9 3/4 120 9003429205 73 1/4 64 1/2 35 3/4 5 1/2 Inlet and outlet size - 1 1/2 three heaters tan...

43 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 in this water heater shall prove upon examination by the warrantor to have leaked due to natural corrosion from potable water therein, dur...