State Industries 197425-004 Unconfined Space, Confined Space, Outdoor Air Through Two Openings

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Such a condition often will result in a yellow, luminous burner flame, causing sooting of the combustion chamber, burners and flue tubes and creates a risk of asphyxiation.

Do not install the water heater in a confined space unless an adequate supply of air for combustion and ventilation is brought in to that space using the methods described in the Confined Space section that follows.

Never obstruct the flow of ventilation air. If you have any doubts or questions at all, call your gas supplier. Failure to provide the proper amount of combustion air can result in a fire or explosion and cause property damage, serious bodily injury or death.

Unconfined Space

An Unconfined Space is one whose volume is not less than 50 cubic feet per 1,000 Btu/hr (4.8 cubic meters per kW) of the total input rating of all appliances installed in the space. Rooms communicating directly with the space, in which the appliances are installed, through openings not furnished with doors, are considered a part of the unconfined space.

Makeup air requirements for the operation of exhaust fans, kitchen ventilation systems, clothes dryers and fireplaces should 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 cubic meters 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 should 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 fresh air openings in instructions that follow do not take in to account presence of louvers, grilles or screens in openings.

The required size of openings for combustion, ventilation and dilution air should 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 should 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 should 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 should be fixed in the open position.

Fresh Air Openings For Confined Spaces

The following instructions should 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 illustrations for the purpose of vent installation. See Installation of Vent System on pages 18-27 for complete venting installation instructions.

Outdoor Air Through Two Openings

FIGURE 6.

The confined space should 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 should communicate directly with the outdoors. See Figure 6.

Each opening should 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 should not be less than 100 square inches (645 cm2).

Outdoor Air Through One Opening

FIGURE 7.

Alternatively a single permanent opening, commencing within 12 inches (300 mm) of the top of the enclosure, should be provided. See

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Contents Whenever maintenance adjustment or service is required Printed197425-004 Safe INSTALLATION, USE and Service ApprovalsImportant Definitions General Safety Information General Safety Information Table of Contents IntroductionInstallation of Carbon Monoxide Detectors Approved Carbon Monoxide DetectorsSignage ExemptionsTypical Installation Replacement Parts and Deliming ProductsElbow Access Door Condensate Hose and Drain PAN Mixing Valves Less Severe Burns 2nd & 3rd DegreeLocating the NEW Water Heater Facts to Consider About the LocationInsulation Blankets Air REQUIREMENTsUnconfined Space Confined SpaceFresh Air Openings For Confined Spaces Outdoor Air Through Two OpeningsOutdoor AIR Through TWO Horizontal Ducts Outdoor AIR Through TWO Vertical DuctsAIR from Other Indoor Spaces Installing the NEW Water Heater Chemical Vapor CorrosionWater Piping Space Heating and Potable Water SystemTemperature-Pressure Relief Valve Thermal ExpansionValve and Pipe Insulation High Altitude Installation Gas PipingSediment Traps Filling the Water HeaterVent Pipe Assembly VentingTermination Clearances Sidewall Power Vent Vent Pipe TerminationPlanning the Vent System CondensateBreathing Hazard Carbon Monoxide Gas Blower Assembly Installation Installation of Vent SystemVent Terminal INSTALLATION, Sidewall Sequence of INSTALLATIONS, Figure Power Vent Wiring Schematic FigureVent Termination Figure Installation of Vent SYSTEM, Sidewall Installation of Vertical Vent SystemVent Attenuation Assembly Installation Vertical VAA Installations RecommendedInch vent Vertical VAA Installations Vent Pipe Preparation Recommended BRUSH* Size for Primer Cement ApplicationsStep B Step EStep F Step GPage Temperature Regulation GAS Control Valve Front ViewPeriodic Maintenance For Your InformationStart UP Conditions Operational ConditionsBurner Cleaning Burner Operation and InspectionHousekeeping Anode ROD InspectionTemperature-Pressure Relief Valve Test Draining and FlushingTo Drain the Water Heater Storage Tank To Flush the Water Heater Storage TankService Leakage CheckpointsRepair Parts List Troubleshooting Guidelines Trouble ShootingLED Status Problem Solution LED Status Problem Solution Troubleshooting Guidelines Troubleshootinotesg Guidelines ServIce and laBor responsIBIlItY ClaIM procedureCondItIons and eXceptIons LIMItatIon on IMplIed warrantIesCopyright 2010 State Industries, Inc. All rights reserved

197425-004 specifications

State Industries Model 197425-004 is a noteworthy water heater designed to cater to the needs of both residential and commercial applications. Known for its efficiency and reliability, this model offers a range of features that enhance its appeal to users looking for an effective water heating solution.

One of the primary characteristics of the 197425-004 is its tankless design, which allows for an endless supply of hot water. Unlike traditional water heaters that store hot water in a tank, this model heats water on demand, conserving both energy and space. This is particularly advantageous for households or businesses with fluctuating hot water needs, as it eliminates the risk of running out of hot water during peak usage times.

The technology behind the State Industries 197425-004 incorporates advanced insulation and heat exchange systems, which significantly improve energy efficiency. With a high energy factor rating, this unit minimizes energy consumption, thus reducing utility bills and environmental impact. Users can expect lower operating costs without sacrificing performance, making it a cost-effective option in the long run.

Another defining feature of the 197425-004 is its durable construction. Built with high-quality materials, including corrosion-resistant components, this water heater is designed for longevity. The model also includes a user-friendly digital thermostat, enabling precise temperature control and easy monitoring. This ensures that users can customize their hot water needs according to individual preferences.

In addition to its performance and efficiency, the State Industries 197425-004 prioritizes safety. It is equipped with multiple safety features such as thermal overload protection and precise temperature regulation, reducing the risk of accidents.

Installation is made convenient with this model, as it is compatible with various plumbing systems and does not require complex modifications. Its compact size allows for flexible installation options, whether it is placed indoors or outdoors, depending on user preferences.

In summary, the State Industries 197425-004 represents a perfect blend of cutting-edge technology, energy efficiency, and durability. With its tankless heating system, impressive energy factor, and safety features, it continues to stand out as an excellent choice for reliable hot water solutions in diverse settings.
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