A.O. Smith Dve-52/80/120 instruction manual Amperage TABLE/OVERCURRENT Protection

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AMPERAGE TABLE/OVERCURRENT PROTECTION

The tables above provides the total connected heating element load in amperes for branch circuit conductor and overcurrent protection sizing. Single-phase heaters are two wire circuits. Three-phase heaters are three wire circuits. In addition to the foregoing, a grounded conductor is required.

The rating of the overcurrent protection must be computed on the basis of 125% 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 - ELECTRONIC CONTROL MODELS

The water heater’s electrical components are pictured and identified in Figures 1 and 2. The model and rating plate illustration on page 4 identifies heater circuit ratings. The ELECTRONIC CONTROL model has two electrical circuits.

•The control circuit, which controls the electrical power to heating elements, referring the following control circuit diagram Figure 3.

•The power circuit, which is operated by the control circuit carries the electrical load of the heating elements. The following describes the heater circuits and includes wiring diagrams for Delta configuration, refer to the “WYE Configuration Insert” for water heaters operating at 380V/400V/416V/575V. All heater circuits are designed for 50/60 cycle alternating current.

CONTROL CIRCUIT- ELECTRONIC CONTROL MODELS

These models are equipped with an electronic control system. The system includes a CCB (Central Control Board) circuit board, an immersion temperature probe with ECO for temperature sensing and

limiting, a UIM (User Interface Module) for user interface & information display and element current sensors for monitoring the power circuits. Refer to the control circuit label on the water heater for details. The CCB is powered by a small 120V/24V transformer. The control circuit operates on 120V supplied by a larger 100VA transformer. Standard equipment includes control circuit fusing using two, 3 amp, class G fuses with 600 volt rating. Do not substitute fuses of a different rating.

Sequence of Operation

1.When the control is powered, the UIM should display model information, water temperature, Operating Set Point, heating status and operating mode.

2.If the control determines that the actual water temperature inside the tank is below the programmed Operating Setpoint minus the (1st) differential, a call for heat is activated.

3.After all safety checks are verified, the CCB will energize contactor coils starting with the lower bank of heating elements (each diagonal row of three heating elements is considered a “bank” - see Figure1)thenenergizethemiddlebank(ifsoequipped)andtopbank (if so equipped). The middle and top banks (if so equipped) are energized according to programmed 2nd and 3rd differential set points.

4.The control remains in the heating mode until the water temperature reaches the programmed Operating Setpoint. At this point the contactors will be de-energized in the reverse order.

5.The control system now enters the standby operating mode while continuing to monitor the water temperature and the state of other system devices. If the water temperature drops below the programmedOperatingSetpointminusthe(1st)differential,thecontrol will automatically return to step 2 and repeat the heating cycle.

NOTE: See the Electronic Control Models Operation section for more detailed information on temperature settings mentioned above.

120 VAC CONTROL CIRCUIT TRANSFORMER CONNECTIONS - ELECTRONIC CONTROL MODELS

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Contents Optional Installation Operation Service Maintenance Limited WarrantyQualified Installer or Service Agency Safe INSTALLATION, USE, and ServiceImportant Definitions Ansi Z223.1 2006 SecPrecautions General Safety InformationHydrogen GAS Flammable Grounding InstructionsIntroduction Table of ContentsStandard DRE/DVE Model DifferencesBTU KW Input Hour 100 110 120 130 140Model and Rating ApprovalsFeatures and Components Surface Mount Control Models Facts to Consider About the Location Locating the NEW Water HeaterInstallation Closed Water Systems Water Line ConnectionsThermal Expansion 16. Allowable Ampacities of Insulated Conductors ElectricalHeater Circuits Electronic Control Models Amperage TABLE/OVERCURRENT ProtectionControl CIRCUIT- Electronic Control Models Wiring Diagrams Power Circuit Diagrams Electronic Control Models Nine Element Single and Three Phase Diagram Conversion to Single Phase Conversion to Three PhasePower Circuit Diagrams Surface Mount Control Models Nine Elements Single and Three Phase Diagram Conversion to Single PhaseGeneral OperationFilling the Water Heater Initial Start UPHigh Temperature Limit Controls ECO Temperature RegulationThermostat Settings Surface Mount Control Thermostat ControlsControl System Features Thermostat Settings electronic CONTROLsElectronic Control Models Operation Control System NavigationStatus Icons Description Discreet Menu Contact Information From the Desktop ScreenOperating States Temperatures MenuState Description Control System MenusDifferential Settings Temperature SettingsOperating Sequence Tank Probe OffsetHeater Status Menu Economy Mode Setup MenuSetpoint Adjustment Value Economy Mode SettingsTime Clock Settings Daily Operating Mode Settings Display Settings Menu Alarm Output Setup MenuHeater Information Menu TOP of Menu Bottom of MenuFault Occurrence Menu Current Fault / Alert MenuFault History Menu Restore Factory Defaults MenuAnode Inspection and Replacement MaintenanceRestore Factory Defaults Flushing Maintenance ScheduleSediment Removal Lime Scale RemovalChecklist Troubleshooting ChecklistReplacement Parts Not enough or no hot waterLeakage Checkpoints ONE Temperature with Circulating Loop Piping DiagramsPiping Diagrams Piping Diagrams TWO Temperature with Mixing Valve Circulating Loop Piping Diagrams Piping Diagrams Piping Diagrams Manifold Kits TWO Heaters Manifold KitsThree Heaters Four HeatersTank Warranty

Dve-52/80/120 specifications

The A.O. Smith DVE-52/80/120 is an innovative water heater designed to meet the diverse needs of both residential and commercial applications. Known for its efficiency and reliability, it stands out in the market due to its advanced features and cutting-edge technologies.

One of the main characteristics of the DVE series is its high energy efficiency, contributing to lower energy bills and a smaller carbon footprint. The units are designed with a high-efficiency burner that can achieve an energy factor (EF) rating significantly above average, ensuring more hot water is produced for less fuel consumption. This makes the A.O. Smith DVE-52/80/120 an environmentally friendly choice without sacrificing performance.

These water heaters also incorporate a unique flame rod technology that enhances the safety and reliability of the system. This feature continuously monitors the ignition of the burner and ensures an optimal combustion process, contributing to both safety and performance. Moreover, their design includes an advanced digital control system that facilitates ease of use and precise temperature management, allowing users to customize their hot water needs efficiently.

The construction of the DVE series is robust, featuring a durable glass-lined tank that resists corrosion and extends the lifespan of the heater. Insulation is another highlight, as A.O. Smith employs thick foam insulation to minimize heat loss, further improving efficiency.

The DVE-52/80/120 models also come equipped with various capacity options, catering to different household sizes and usage patterns. Whether for a small home or a larger establishment, the flexibility in capacity ensures users have consistent hot water availability according to their demands.

Additionally, the A.O. Smith DVE series is compatible with various smart home systems, making it an ideal choice for modern households seeking integrated solutions. The compatibility with Wi-Fi allows for remote monitoring and control, giving users greater convenience and peace of mind.

In summary, the A.O. Smith DVE-52/80/120 water heater is engineered with advanced technologies and reliable features that ensure optimal efficiency, safety, and performance, making it a smart investment for any hot water needs. Its blend of durability, customizable capacity, and smart technology integration positions it as a leading choice in the water heating market.
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