Desa VSF30PT, LSFG20NT Air For Combustion Ventilation, Providing Adequate Ventilation

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Air For Combustion

and Ventilation

WARNING: This heater shall not be installed in a confined space or unusually tight con- struction unless provisions are provided for adequate combus- tion and ventilation air. Read the following instructions to insure proper fresh air for this and other fuel-burning appliances in your home.

Today’s homes are built more energy efficient than ever. New materials, increased insulation and new construction methods help reduce heat loss in homes. Home owners weather strip and caulk around windows and doors to keep the cold air out and the warm air in. During heating months, home owners want their homes as airtight as possible.

While it is good to make your home energy effi- cient, your home needs to breathe. Fresh air must enter your home. All fuel-burning appliances need fresh air for proper combustion and ventilation.

Exhaust fans, fireplaces, clothes dryers and fuel burning appliances draw air from the house to operate. You must provide adequate fresh air for these appliances. This will insure proper venting of vented fuel-burning appliances.

PROVIDING ADEQUATE

VENTILATION

The following are excerpts from National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation.

All spaces in homes fall into one of the three fol- lowing ventilation classifications:

1.Unusually Tight Construction

2.Unconfined Space

3.Confined Space

The information on pages 5 through 7 will help you classify your space and provide adequate ventilation.

Unusually Tight Construction

The air that leaks around doors and windows may provide enough fresh air for combustion and ventilation. However, in buildings of unusually tight construction, you must provide additional fresh air.

Unusually tight construction is defined as construction where:

a.walls and ceilings exposed to the out- side atmosphere have a continuous water vapor retarder with a rating of one perm (6 x 10-11kg per pa-sec-m2) or less with openings gasketed or sealed and

b.weather stripping has been added on openable windows and doors and

c.caulking or sealants are applied to areas such as joints around window and door frames, between sole plates and floors, between wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical and gas lines and at other openings.

If your home meets all of these three cri- teria, you must provide additional fresh air. See Ventilation Air From Outdoors, page 7.

If your home does not meet all of the three criteria above, proceed to Determining Fresh-Air Flow For Heater Location.

Confined and Unconfined Space

The National Fuel Gas Code, ANSI Z223.1/NFPA 54 defines a confined space as a space whose volume is less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space and an unconfined space as a space whose volume is not less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space. Rooms com- municating directly with the space in which the appliances are installed*, through openings not furnished with doors, are considered a part of the unconfined space.

*Adjoining rooms are communicating only if there are doorless passageways or ventilation grills between them.

DETERMINING FRESH-AIR FLOW FOR Heater LOCATION

Determining if You Have a Confined or

Unconfined Space

Use this work sheet to determine if you have a confined or unconfined space.

Space: Includes the room in which you will install heater plus any adjoining rooms with doorless pas- sageways or ventilation grills between the rooms.

116307-01Cwww.desatech.com

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Contents Garage Models ResidentialModels SF20NT, SF20PT Safety Information Table of ContentsSafety Information Product Features Safety InformationLocal Codes Product IdentificationDetermining FRESH-AIR Flow for Heater Location Air For Combustion VentilationProviding Adequate Ventilation Ventilation Air From Inside Building AIR for Combustion VentilationVentilation AIR Installation Items InstallationCheck GAS Type Ventilation Air From OutdoorsLocating Heater Installing Heater to WallMarking Screw Locations Connecting to GAS SupplyPlacing Heater On Mounting Screws Locate hardware packet behind left side door of heaterPropane/LP Natural GasChecking GAS Connections Pressure Testing Heater Gas ConnectionsTest Pressures Equal To or Less Than 1/2 Psig 3.5 kPa Open equipment shutoff valve see FigureOperating Heater For Your Safety Read Before LightingInstalling Refractory and Front Panel To Turn OFF GAS To Appliance Lighting InstructionsShutting Off Heater Shutting Off Burner Only pilot stays litInspecting Heater Manual Lighting ProcedureOperation Pilot Flame PatternODS/PILOT and Burner Cleaning MaintenanceBurner Pilot Air Inlet CabinetObserved Problem Possible Cause Remedy TroubleshootingTroubleshooting Dirty or partially clogged Clean burner see Cleaning Noise when burner is litWhen heated, vapors from Turn heater off when using Turn off air supplyService Publications Service Hints Technical ServiceWhen Gas Pressure Is Too Low Gas leak. See WarningLSF20NT, LSFG20NT, VSF20NT LSF20PT, LSFG20PT, VSF20PT SpecificationsVSFG20NT VSGF20PT SF30NT SF30PTParts Central AccessoriesReplacement Parts Illustrated Parts Breakdown Parts List Keep this Warranty Warranty InformationModelos Para Cochera Consumidor Conserve este manual para referencias futurasModelos Información de seguridad Tabla de contenidoInformación de seguridad Identificación del Producto Códigos localesDesempaque Características del ProductoCómo Procurar LA Ventilación Adecuada Aire para combustión VentilaciónConstrucción inusualmente sellada Espacio confinado y no confinadoAire del interior de la construcción para Ventilación Aire Para Combustión VentilaciónAire Para Ventilación Artículos DE Instalación InstalaciónVerifique EL Tipo DE GAS Donde cortinas, muebles, ropa Ubicación DEL CalentadorDe las partes anterior, superior Fuertes corrientes de aireDoble en anclaje de pared como se muestra en la figura Instalación DEL Calentador EN LA ParedColocación del calentador en los Tornillos de montaje Coloque el calentador en los tornillos de montajeVentila apuntando hacia abajo Conexión AL Suministro DE GASRepare todas las fugas inmediatamente Revisión DE LAS Conexiones DE GASGas natural Instale el panel anterior y el refractario Abra la válvula de cierre del equipo consulte la figuraInstalación del panel anterior y el refractario Instale un difusor frontal como se muestra en la figuraInstrucciones DE Encendido Funcionamiento del CalentadorCómo Cerrar EL Suministro DE GAS AL Aparato Inspección del CalentadorFuncionamiento DEL Encendido ManualPatrón DE LA Llama DEL Calentador Inspección delLimpieza y Mantenimiento Gabinete EspecificacionesSF30NT LSF30NT, VSF30NTCausa Posible Remedio Solución de problemasSolución DE Problemas Llama amarilla durante la No hay suficiente aire El problema desapareceráCombustión En el quemadorPublicaciones de servicio Servicio técnicoConsejos para servicio Al inicio de la páginaPiezas de repuesto AccesoriosCentral de piezas Válvula DE Cierre DEL Equipo GA5010Clasificación ilustrada de piezas Lista DE Piezas Guarde Esta Garantía Información de garantía

VSF30PT, LSFG20NT specifications

The Desa VSF30PT and LSFG20NT represent two significant innovations in the HVAC (Heating, Ventilation, and Air Conditioning) industry, catering to diverse consumer needs and preferences.

The Desa VSF30PT is a powerful and efficient forced-air heater designed for residential and light commercial applications. One of its primary features is its high-efficiency output, providing a substantial heating capacity while consuming minimal energy. The unit is equipped with a robust heat exchanger that enhances its performance, ensuring optimal heat distribution throughout the space. A notable characteristic of the VSF30PT is its user-friendly digital thermostat, allowing for precise temperature control, which can significantly improve comfort levels and reduce energy consumption.

Additionally, the Desa VSF30PT incorporates advanced safety features, such as automatic shut-off protection in case of overheating or airflow obstruction. Its compact design makes it easy to install in tight spaces, providing flexibility in placement without compromising on effectiveness. The unit operates quietly, minimizing noise disturbances, which is especially important in residential settings.

On the other hand, the LSFG20NT is an innovative gas furnace that combines performance with energy efficiency. This model is equipped with a variable-speed blower motor that allows for consistent airflow and improved humidity control, making it an excellent choice for homeowners who prioritize comfort. Its multi-stage heating design ensures that the furnace operates at different levels according to the heating demand, optimizing energy usage and enhancing overall efficiency.

The LSFG20NT also features a modulating gas valve, which adjusts the burner output to provide just the right amount of heat for any given situation. This not only improves comfort but also contributes to significant energy savings over time. Furthermore, the LSFG20NT is designed with advanced filtration systems that improve indoor air quality by trapping dust, allergens, and other particles.

Both units showcase the latest technology in HVAC systems, emphasizing energy efficiency, safety, and user convenience. With their unique features and characteristics, the Desa VSF30PT and LSFG20NT stand out in the market, making them ideal choices for those seeking reliable and efficient heating solutions. Whether for residential or light commercial applications, these models promise performance that meets the demands of modern-day heating needs.
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