Desa SF20NT installation manual 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.

Todayʼs 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.

116307-01A

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Contents Residential Models Garage Models What to do if YOU Smell GASTable of Contents Safety Information Unpacking Product FeaturesLocal Codes Determining FRESH-AIR Flow for Heater Location AIR for Combustion VentilationProviding Adequate Ventilation Ventilation Air From Inside Building Ventilation AIRInstallation Items InstallationCheck GAS Type Ventilation Air From OutdoorsLocating Heater Installing Heater to WallColdest part of room Attaching to wall stud Attaching to wall anchorMark two screw locations on wall as shown in Figure Marking Screw LocationsLocate hardware packet behind left side door of heater Attaching To Wall Anchor MethodExternal Regulator With Vent Pointing Down Connecting to GAS SupplyTest Pressures Equal To or Less Than 1/2 Psig 3.5 kPa Checking GAS ConnectionsTest Pressures In Excess Of 1/2 Psig 3.5 kPa Installing Refractory and Front Panel For Your Safety Read Before LightingOperating Heater Make sure control knob of heater is in the OFF positionWhat to do if YOU Smell GAS Lighting InstructionsInspecting Heater ODS/PILOT and Burner Cleaning MaintenanceBurner Pilot AIR Inlet CabinetContact local propane/LP gas company TroubleshootingObserved Problem Possible Cause Remedy Problem could be caused by Goes out when control knob is Control knob not pressedAssembly Delayed ignition of burners Manifold pressure is too lowDirty 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 WarningLSF30NT, VSF30NT LSF30PT, VSF30PT SpecificationsSF30NT SF30PT Parts Central AccessoriesReplacement Parts Illustrated Parts Breakdown LSF20PT Parts ListKeep this Warranty Warranty InformationModelos Modelos Para Cochera QUÉ Hacer SI Percibe Olor a GASTabla DE Contenido Información 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 VentilaciónVerifique EL Tipo DE GAS InstalaciónArtículos DE Instalación Aire del exterior para ventilaciónUbicación DEL Calentador En áreas con mucho viento oDoble 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 GASGas natural Revisión DE LAS Conexiones DE GASPropano o gas LP Repare todas las fugas inmediatamenteInstalación del panel anterior y el refractario Abra la válvula de cierre del equipo consulte la figuraInstale el panel anterior y el refractario No intente encender ningún aparato Instrucciones DE EncendidoInspección DEL Calentador Funcionamiento DELLimpieza Y Mantenimiento Inspección DELEntrada DE Aire AL Piloto DEL Quemador Como se muestra en la figuraCausa Posible Remedio Solución DE ProblemasBaja presión del gas Problema Observado Causa Posible RemedioEl termopar está dañado Presione totalmente la perilla de controlCierre el suministro de aire El problema desapareceráSe enciende o se apaga Silbante cuando el quemadorCuando la presión del gas de entrada sea muy baja Servicio TécnicoConsejos Para Servicio LSF30NT, VSF30NT EspecificacionesSF30NT Central DE Piezas AccesoriosPiezas DE Repuesto Clasificación Ilustrada DE Piezas Lista DE Piezas Guarde Esta Garantía Información DE Garantía

SF20NT specifications

Desa SF20NT is a versatile and innovative gas-fired space heater designed for efficient heating solutions in various environments, whether in residential, commercial, or industrial settings. This model is known for its high performance, energy efficiency, and advanced technology, making it a popular choice among users seeking reliability and effectiveness in their heating needs.

One of the primary features of the Desa SF20NT is its impressive heating capacity. With a heating output of around 20,000 BTUs, it can effectively warm spaces up to 1,000 square feet, making it suitable for larger areas. This capability is enhanced by the heater's superior metal construction, ensuring durability and long-lasting performance.

In terms of technology, the Desa SF20NT incorporates a direct vent system that utilizes outside air for combustion. This feature not only increases efficiency but also enhances safety, as it minimizes the risk of hazardous fumes entering the living space. The direct vent system allows for installation flexibility; the unit can be vented horizontally through a wall or vertically through a roof, catering to different building designs.

Another standout characteristic of the Desa SF20NT is its thermostat control, which allows users to maintain a consistent temperature easily. This feature contributes to energy savings by enabling the heater to operate only when necessary, thus reducing unnecessary heating costs. Additionally, the unit includes a programmable timer, allowing users to set specific heating schedules, further optimizing energy use.

Safety is also a critical aspect of the Desa SF20NT design. It comes with built-in safety features such as a flame sensor and a safety shut-off system, ensuring that the heater operates under safe conditions at all times. The unit is designed to meet stringent safety standards, giving users peace of mind.

In summary, the Desa SF20NT is a powerful, efficient, and safe space heater that is equipped with modern features and technologies. With its high heating capacity, direct vent system, thermostat control, and safety mechanisms, it stands out as an excellent choice for anyone looking for reliable heating solutions. Whether for home or business use, the Desa SF20NT is built to provide comfort and efficiency year-round.
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