A.O. Smith 100 Power Vent DV Series 120, 317443-000 Control system operation, Overview

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control system operation

Overview

The water heaters covered in this manual are equipped with an electronic control system that regulates water temperature inside the storage tank. Heating cycles and ignition are managed by the control system. The ECO (energy cut out), Flame Sensor, pressure switches and Temperature Probe is monitored by the control system. The Combustion Blower, Igniter and the 24 Volt Gas Valve are all energized by the control system.

The main components of the control system are a UIM (user interface module) and a CCB (central control board). The UIM is located on the top front side of the water heater. The CCB is mounted on top of the water heater inside a protective enclosure.

Commercial And Residential Models

The water heaters covered by this manual are produced for commercial and residential use. The control system is programmed differently for commercial and residential models. There are two differences in control system operation between the residential and commercial products:

•Commercial models will display Tank Temperature on the Desktop screen, residential models will not.

•Commercial models can regulate tank temperature up to a maximum of 180°F (82°C), residential maximum is 160°F (71°C).

Control System Navigation

All operational information and user settings are displayed and accessed from the UIM. The UIM houses the control system's LCD (liquid crystal display) and five snap acting (momentary) user input buttons; an up, down and three multifunction operational buttons below the LCD, see Figure 35.

User Input Buttons

•The up and down buttons are used to navigate menus and adjust user settings.

•The operational buttons are used to enter/exit menus, select menu items, activate adjustment modes and confirm or cancel new user settings. The operational buttons are multifunctional, their current function is defined by the text that appears directly above each button on the LCD screen.

The Desktop Screen

During normal operation the control system will display the "Desktop" screen on the LCD which is the default screen. The control system will return to the Desktop screen when there are no active Fault or Alert conditions or when there has been no user input for several minutes.

•Manufacturer and water heater model information is displayed in Title Bar at the top of the Desktop screen. Menu titles are displayed in the Title Bar when navigating the control system menus.

•The first temperature shown on the Desktop screen, Tank Temperature, is the temperature of the water inside the water heater's storage tank - commercial models only.

•The Operating Set Point is also shown on the Desktop screen. The Operating Set Point is the temperature at which the control system will maintain the water inside the storage tank.

•Beneath the Operating Set Point is the "Status" line. The Status line shows the current operational state of the control system in real time. See Table 4 for a description of the various operating states.

•The Desktop screen also displays animated "Status Icons" to convey operational information, see Table 3 for a complete list and description of the Status Icons.

UIM (user interface module)

Desktop Screen Shown

LCD Screen

MANUFACTURER / MODEL INFORMATION

Information

Operating Set Point

120°F

Display

 

Status: Heating

 

Status Icons

OFF

 

 

 

 

GAS

O

 

N

MENUHELP

Title Bar

UP

DN

Up & Down buttons:

 

navigate menus,

 

adjust user settings

Operational buttons are multifunctional. Their current function is defined by the text that appears directly above each button on the LCD screen.

3 Operational buttons: enter/exit menus, select menu items, activate adjustment modes, confirm/cancel changes.

Figure 35.

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Contents Printed Whenever maintenance adjustment or service is required317443-000 Table of contents Approvals Safe installation, use and servicePrecautions Hydrogen Gas Flammable General safety informationGrounding Instructions General safety information Fire or Explosion Hazard Introduction Preparing For The InstallationAbbreviations Used QualificationsReplacement Parts and Deliming Products Features and componentsRough in Dimensions Installation considerationRough-In-Dimensions Recovery capacity based on 96% thermal efficiencyLocating The Water Heater Property Damage HazardInsulation Blankets Combustion AIR and VentilationUnconfined Space Fresh Air Openings For Confined Spaces Confined SpaceOutdoor Air Through Two Openings Outdoor Air Through One OpeningAir From Other Indoor Spaces Outdoor Air Through Two Horizontal DuctsPower Supply Installing the new water heaterChemical Vapor Corrosion Water PipingDishwashing Machines Mixing ValvesSpace heating and potable water system Thermal Expansion Closed Water SystemsValve and Pipe Insulation if supplied Valve Discharge Pipe Requirements Temperature-Pressure Relief ValveCondensate Piping Gas pipingFilling the Water Heater High Altitude Installations Sediment TrapsVent Pipe Termination VentingPlanning the Vent System Vent Terminal INSTALLATION, Sidewall Installation of Vent SystemInstallation of Carbon Monoxide Detectors Installation Requirements Commonwealth of MassachusettsApproved Carbon Monoxide Detectors SignagePower Vent Termination Clearances Sidewall Power VentDirect Vent Termination Clearances Sidewall Direct VentSequence of INSTALLATIONS, a Installation SequenceVent Termination a Direct Vent terminal installation Vent Terminals Supplied with Heater Must be UsedFlat Roof Installation Safety Considerations Concentric vent installationKIT Components Description QtyConcentric Termination Flat Roof Clearance MULTI-CONCENTRIC Vent Terminations Direct vent diagram Vent Pipe Preparation Step E Step BStep F Step GBlocked Exhaust Switch Blower Prover SwitchBlocked Intake Switch ON/OFF SwitchPower Vent Wiring Schematic Figure What to do if YOU Smell GAS Do not try to light the burner by handDo not TRY to Light the Burner by Hand HI Limit Switch ECO Temperature regulationOverview Control system operationControl System Navigation Status Icons Icon DescriptionControl System Menus Operating StatesTemperatures Operating Set Point And Differential Adjustment User Settings & Control System MenusHeater Status TemperaturesECO Contact , Blocked Inlet PS , Blocked Outlet PS , Blower Blower Low On , Blower High On displays whetherHeater Information Display SettingsFault History Current FaultFault Occurrence Restore Factory DefaultsService Contact Information Service Contact InformationStart UP Conditions For your informationOperational Conditions Temperature-Pressure Relief Valve Operation Periodic maintenanceVenting System Inspection Anode ROD InspectionTo drain the water heater storage tank ServiceTo Flush the Water Heater Storage Tank Temperature-Pressure Relief Valve Test MaintenanceLeakage checkpoints Installation Checklist TroubleshootingYES no Sequence Of Operation Flow ChartFault And Alert Conditions Operational ProblemsDiagnostic Checks Resetting Control System Lock OutsAC Reversed Fault And Alert MessagesBlower Prover Failure Page Page Page Fill in Warranty and Keep for Future Reference Limited Warranty

100 Power Vent DV Series 120, 317443-000 specifications

The A.O. Smith 317443-000,100 Power Vent DV Series 120 is an advanced water heating solution designed to enhance efficiency and performance for residential applications. As part of A.O. Smith's renowned lineup, this model embodies the company's commitment to innovation and energy conservation.

One of the main features of the DV Series 120 is its power venting capability. This technology allows for flexible installation options, as it can vent vertically or horizontally, accommodating various home configurations. It utilizes a fan-assisted venting system, which efficiently expels exhaust gases, ensuring safe operation even in tight spaces.

The unit's energy efficiency is another standout characteristic. Equipped with a high-efficiency gas burner, the DV Series 120 optimizes fuel consumption, resulting in lower utility bills while providing reliable hot water when needed. Its impressive Energy Factor (EF) ratings make it an environmentally friendly choice, aligning with modern standards for green building practices.

Durability is also a significant focus of the A.O. Smith 317443-000,100 Power Vent model. Constructed with a glass-lined tank and a robust anode rod, this water heater is designed to resist corrosion and extend its lifespan. This construction enhances performance reliability while minimizing maintenance needs, making it a smart investment for homeowners.

Smart technologies are integrated into the DV Series 120, featuring an intelligent control system that provides various operational insights. The built-in diagnostic features allow homeowners to monitor performance and identify potential issues early, reducing the likelihood of unexpected failures. This control system can also enable more precise temperature management, enhancing both comfort and efficiency.

Safety is paramount in the design of the A.O. Smith 317443-000,100. The unit comes equipped with safety features such as a built-in flame rollout sensor and an automatic shut-off system to protect against potential hazards. These features ensure peace of mind for users, allowing them to confidently rely on their hot water supply.

In summary, the A.O. Smith 317443-000,100 Power Vent DV Series 120 stands out as a high-efficiency water heating solution, combining innovative venting technologies, durability, smart features, and safety mechanisms. This model is an ideal choice for homeowners seeking a reliable and efficient hot water system that meets modern energy standards.
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