A.O. Smith 317443-000 Fresh Air Openings For Confined Spaces, Outdoor Air Through One Opening

Page 12

ventilation systems, clothes dryers and fireplaces shall also be considered in determining the adequacy of a space to provide combustion, ventilation and dilution air.

Unusually Tight Construction

In unconfined spaces in buildings, infiltration may be adequate to provide air for combustion, ventilation and dilution of flue gases. However, in buildings of unusually tight construction (for example, weather stripping, heavily insulated, caulked, vapor barrier, etc.) additional air must be provided using the methods described in the Confined Space section that follows.

Confined Space

A Confined Space is one whose volume is less than 50 cubic feet per 1,000 Btu/hr (4.8 cm per kW) of the total input rating of all appliances installed in the space.

Openings must be installed to provide fresh air for combustion, ventilation and dilution in confined spaces. The required size for the openings is dependent on the method used to provide fresh air to the confined space and the total Btu/hr input rating of all appliances installed in the space.

Direct Vent Appliances

Appliances installed in a Direct Vent configuration that derive all air for combustion from the outdoor atmosphere through sealed intake air piping are not factored in the total appliance input Btu/hr calculations used to determine the size of openings providing fresh air into confined spaces.

Exhaust Fans

Where exhaust fans are installed, additional air shall be provided to replace the exhausted air. When an exhaust fan is installed in the same space with a water heater, sufficient openings to provide fresh air must be provided that accommodate the requirements for all appliances in the room and the exhaust fan. Undersized openings will cause air to be drawn into the room through the water heater’s vent system causing poor combustion. Sooting, serious damage to the water heater and the risk of fire or explosion may result. It can also create a risk of asphyxiation.

Louvers and Grilles

The free areas of the fresh air openings in the instructions that follow do not take in to account the presence of louvers, grilles or screens in the openings.

The required size of openings for combustion, ventilation and dilution air shall be based on the “net free area” of each opening. Where the free area through a design of louver or grille or screen is known, it shall be used in calculating the size of opening required to provide the free area specified. Where the louver and grille design and free area are not known, it shall be assumed that wood louvers will have 25% free area and metal louvers and grilles will have 75% free area. Non motorized louvers and grilles shall be fixed in the open position.

Fresh Air Openings For Confined Spaces

The following instructions shall be used to calculate the size, number and placement of openings providing fresh air for combustion, ventilation and dilution in confined spaces. The illustrations shown in this section of the manual are a reference for the openings that provide fresh air into confined spaces only. Do not refer to these illustrationsforthepurposeofventinstallation.SeeVentingInstallation on page 20 for complete venting installation instructions.

Outdoor Air Through Two Openings

FIGURE 4.

The confined space shall be provided with two permanent openings, one commencing within 12 inches (300 mm) of the top and one commencing within 12 inches (300 mm) of the bottom of the enclosure. The openings shall communicate directly with the outdoors. See Figure 4.

Each opening shall have a minimum free area of 1 square inch per 4,000 Btu/hr (550 mm2 per kW) of the aggregate input rating of all appliances installed in the enclosure. Each opening shall not be less than 100 square inches (645 cm2).

Outdoor Air Through One Opening

FIGURE 5.

Alternatively a single permanent opening, commencing within 12 inches (300 mm) of the top of the enclosure, shall be provided. See Figure 5. The water heater shall have clearances of at least 1 inch (25 mm) from the sides and back and 6 inches (l50

mm)from the front of the appliance. The opening shall directly communicate with the outdoors or shall communicate through a vertical or horizontal duct to the outdoors or spaces that freely communicate with the outdoors and shall have a minimum free area of the following:

12

Page 11 Page 13
Image 12
Page 11 Page 13
Contents Whenever maintenance adjustment or service is required Printed317443-000 Table of contents Safe installation, use and service ApprovalsGeneral safety information Precautions Hydrogen Gas FlammableGrounding Instructions General safety information Fire or Explosion Hazard Preparing For The Installation IntroductionAbbreviations Used QualificationsFeatures and components Replacement Parts and Deliming ProductsInstallation consideration Rough in DimensionsRough-In-Dimensions Recovery capacity based on 96% thermal efficiencyProperty Damage Hazard Locating The Water HeaterCombustion AIR and Ventilation Insulation BlanketsUnconfined Space Confined Space Fresh Air Openings For Confined SpacesOutdoor Air Through Two Openings Outdoor Air Through One OpeningOutdoor Air Through Two Horizontal Ducts Air From Other Indoor SpacesInstalling the new water heater Power SupplyChemical Vapor Corrosion Water PipingMixing Valves Dishwashing MachinesSpace heating and potable water system Closed Water Systems Thermal ExpansionValve and Pipe Insulation if supplied Temperature-Pressure Relief Valve Valve Discharge Pipe RequirementsGas piping Condensate PipingHigh Altitude Installations Sediment Traps Filling the Water HeaterVenting Vent Pipe TerminationPlanning the Vent System Installation of Vent System Vent Terminal INSTALLATION, SidewallInstallation Requirements Commonwealth of Massachusetts Installation of Carbon Monoxide DetectorsApproved Carbon Monoxide Detectors SignageTermination Clearances Sidewall Power Vent Power VentTermination Clearances Sidewall Direct Vent Direct VentInstallation Sequence Sequence of INSTALLATIONS, aVent Termination a Direct Vent terminal installation Vent Terminals Supplied with Heater Must be UsedFlat Roof Installation Concentric vent installation Safety ConsiderationsKIT Components Description QtyConcentric Termination Flat Roof Clearance MULTI-CONCENTRIC Vent Terminations Direct vent diagram Vent Pipe Preparation Step B Step EStep F Step GBlower Prover Switch Blocked Exhaust SwitchBlocked Intake Switch ON/OFF SwitchPower Vent Wiring Schematic Figure Do not try to light the burner by hand What to do if YOU Smell GASDo not TRY to Light the Burner by Hand Temperature regulation HI Limit Switch ECOControl system operation OverviewControl System Navigation Icon Description Status IconsOperating States Control System MenusUser Settings & Control System Menus Temperatures Operating Set Point And Differential AdjustmentTemperatures Heater StatusECO Contact , Blocked Inlet PS , Blocked Outlet PS , Blower Blower Low On , Blower High On displays whetherDisplay Settings Heater InformationCurrent Fault Fault HistoryFault Occurrence Restore Factory DefaultsService Contact Information Service Contact InformationFor your information Start UP ConditionsOperational Conditions Periodic maintenance Temperature-Pressure Relief Valve OperationVenting System Inspection Anode ROD InspectionService To drain the water heater storage tankTo Flush the Water Heater Storage Tank Maintenance Temperature-Pressure Relief Valve TestLeakage checkpoints Troubleshooting Installation ChecklistSequence Of Operation Flow Chart YES noOperational Problems Fault And Alert ConditionsResetting Control System Lock Outs Diagnostic ChecksFault And Alert Messages AC ReversedBlower Prover Failure Page Page Page Limited Warranty Fill in Warranty and Keep for Future Reference

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.
Top Page Image Contents