Desa SF20NT Cleaning Maintenance, ODS/PILOT and Burner, Burner Pilot AIR Inlet, Cabinet

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INSPECTING HEATER

Continued

Figure 20 shows a correct burner flame pattern. Figure 21 shows an incorrect burner flame pattern. The incorrect burner flame pattern shows yellow tipping of the flame.

If burner flame pattern is incorrect, as shown in Figure 21

•turn heater off (see To Turn Off Gas to Appli- ance, page 14)

•

see Troubleshooting, page 16

 

Blue

 

Flame

Figure 20 - Correct Burner Flame Pattern

Yellow

Tipping

Figure 21 - Incorrect Burner Flame Pattern

CLEANING AND

MAINTENANCE

WARNING: Turn off heater and let cool before cleaning.

CAUTION: You must keep control areas, burner and circu- lating air passageways of heater clean. Inspect these areas of heater before each use. Have heater inspected yearly by a qualified service person. Heater may need more frequent clean- ing due to excessive lint from carpeting, bedding material, pet hair, etc.

WARNING: Failure to keep the primary air opening(s) of the burner(s) clean may result in sooting and property damage.

ODS/PILOT AND BURNER

Use a vacuum cleaner, pressurized air or small, soft bristled brush to clean.

BURNER PILOT AIR INLET

The primary air inlet holes allow the proper amount of air to mix with the gas. This provides a clean burning flame. Keep these holes clear of dust, dirt and lint. Clean these air inlet holes prior to each heating season. Blocked air holes will create soot. We recommend that you clean the unit every three months during operation and have heater inspected yearly by a qualified service person.

We also recommend that you keep the burner tube and pilot assembly clean and free of dust and dirt. To clean these parts we recommend using compressed air no greater than 30 PSI. Your local computer store, hardware store or home center may carry compressed air in a can. You can use a vacuum cleaner in the blow position. If using com- pressed air in a can, please follow the directions on the can. If you donʼt follow directions on the can, you could damage the pilot assembly.

1.Shut off the unit, including the pilot. Allow the unit to cool for at least thirty minutes.

2.Inspect burner, pilot for dust and dirt.

3.Blow air across the ports/slots and holes in the burner.

4.Never insert objects into the pilot tube.

Clean the pilot assembly also. A yellow tip on the pilot flame indicates dust and dirt in the pilot as- sembly. There is a small pilot air inlet about two inches from where the pilot flame comes out of the pilot assembly (see Figure 22). With the heater off, lightly blow air through the air inlet. You may blow through a drinking straw if compressed air is not available.

Pilot Assembly

Pilot Air Inlet

Figure 22 - Pilot Air Inlet

CABINET

Air Passageways Use a vacuum cleaner or pressurized air to clean.

Exterior Use a soft cloth dampened with a mild soap and water mixture. Wipe the cabinet to remove dust.

116307-01A

www.desatech.com

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Contents Residential Models Garage Models What to do if YOU Smell GASTable of Contents Safety Information Product Features Local CodesUnpacking AIR for Combustion Ventilation Providing Adequate VentilationDetermining FRESH-AIR Flow for Heater Location Ventilation Air From Inside Building Ventilation AIRVentilation Air From Outdoors InstallationInstallation Items Check GAS TypeAttaching to wall stud Attaching to wall anchor Installing Heater to WallLocating Heater Coldest part of roomAttaching To Wall Anchor Method Marking Screw LocationsMark two screw locations on wall as shown in Figure Locate hardware packet behind left side door of heaterExternal Regulator With Vent Pointing Down Connecting to GAS SupplyChecking GAS Connections Test Pressures In Excess Of 1/2 Psig 3.5 kPaTest Pressures Equal To or Less Than 1/2 Psig 3.5 kPa Make sure control knob of heater is in the OFF position For Your Safety Read Before LightingInstalling Refractory and Front Panel Operating HeaterWhat to do if YOU Smell GAS Lighting InstructionsInspecting Heater Cabinet Cleaning MaintenanceODS/PILOT and Burner Burner Pilot AIR InletTroubleshooting Observed Problem Possible Cause RemedyContact local propane/LP gas company Delayed ignition of burners Manifold pressure is too low Goes out when control knob is Control knob not pressedProblem could be caused by AssemblyTurn off air supply Noise when burner is litDirty or partially clogged Clean burner see Cleaning When heated, vapors from Turn heater off when usingGas leak. See Warning Technical ServiceService Publications Service Hints When Gas Pressure Is Too LowSpecifications SF30NT SF30PTLSF30NT, VSF30NT LSF30PT, VSF30PT Accessories Replacement PartsParts Central 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 Características DEL Producto Códigos LocalesIdentificación DEL Producto DesempaqueEspacio confinado y no confinado Aire Para Combustión VentilaciónCómo Procurar LA Ventilación Adecuada Construcción inusualmente selladaAire del interior de la construcción para ventilación Aire Para VentilaciónAire del exterior para ventilación InstalaciónVerifique EL Tipo DE GAS Artículos DE InstalaciónUbicación DEL Calentador En áreas con mucho viento oColoque el calentador en los tornillos de montaje Instalación DEL Calentador EN LA ParedDoble en anclaje de pared como se muestra en la figura Colocación del 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 Propano o gas LPAbra la válvula de cierre del equipo consulte la figura Instale el panel anterior y el refractarioInstalación del panel anterior y el refractario No intente encender ningún aparato Instrucciones DE EncendidoInspección DEL Calentador Funcionamiento DELComo se muestra en la figura Inspección DELLimpieza Y Mantenimiento Entrada DE Aire AL Piloto DEL QuemadorCausa Posible Remedio Solución DE ProblemasPresione totalmente la perilla de control Problema Observado Causa Posible RemedioBaja presión del gas El termopar está dañadoSilbante cuando el quemador El problema desapareceráCierre el suministro de aire Se enciende o se apagaServicio Técnico Consejos Para ServicioCuando la presión del gas de entrada sea muy baja Especificaciones SF30NTLSF30NT, VSF30NT Accesorios Piezas DE RepuestoCentral DE Piezas 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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