Desa SF20NT Turn off air supply, Burner not Positioned, Or contracting while cooling, Blocked

Page 18

TROUBLESHOOTING

Continued

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

 

 

 

 

Yellow flame during burner

1. Not enough air

1.

Check burner for dirt and

combustion

 

 

 

 

debris. If found, clean burner

 

 

 

 

 

(see Cleaning and Mainte-

 

2.

Gas regulator defective

 

nance, page 15)

 

2.

Replace gas regulator

 

3.

Clogged or dirty burner

3.

Clean burner (see Cleaning

 

4.

Air blowing into heater

 

and Maintenance, page 15)

 

4.

Turn off air supply

 

5.

Burner not

positioned in

5.

Have a qualified service person

 

 

bracket properly

 

or installer inspect burner

 

 

 

 

Slight smoke or odor during

1. Residues from manufacturing

1.

Problem will stop after a few

initial operation

 

processes

 

 

hours of operation

 

 

 

 

Heater produces a clicking/tick-

1. Metal expanding while heating

1.

This is common with most heat-

ing noise just after burner is lit

 

or contracting while cooling

 

ers. If noise is excessive, contact

or shut off

 

 

 

 

qualified service person

 

 

 

 

Heater produces a whistling

1. Turning control knob to the

1.

Turn control knob to the low-

noise when burner is lit

 

highest position when burner

 

est position and let warm up

 

 

is cold

 

 

for a minute

 

2.

Air in gas line

2.

Operate burner until air is

 

 

 

 

 

removed from line. Have gas

 

 

 

 

 

line checked by local natural

 

 

 

 

 

or propane/LP gas company

 

3.

Air passageways on heater

3.

Observe minimum installation

 

 

blocked

 

 

clearances (see Figure 4, page 8)

 

4.

Dirty or partially clogged

4.

Clean burner (see Cleaning

 

 

burner orifice

 

 

and Maintenance, page 15)

 

 

 

 

 

or replace burner orifice

 

 

 

 

White powder residue forming

1. When heated, vapors from

1.

Turn heater off when using

within burner box or on adjacent

 

furniture polish, wax, carpet

 

furniture polish, wax, carpet

walls or furniture

 

cleaner, etc., may turn into

 

cleaners or similar products

 

 

white powder residue

 

 

 

 

 

 

Heater shuts off in use (ODS

1. Not enough fresh air is avail-

1.

Open window and/or door for

operates)

 

able

 

 

ventilation

 

2.

Low line pressure

2.

Contact local natural or pro-

 

3.

O D S / pi l o t

i s p a rt i a l l y

 

pane/LP gas company

 

3.

Clean ODS/pilot (see Cleaning

 

 

clogged

 

 

and Maintenance, page 15)

18

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Contents What to do if YOU Smell GAS Residential Models Garage ModelsTable of Contents Safety Information Product Features Local CodesUnpacking AIR for Combustion Ventilation Providing Adequate VentilationDetermining FRESH-AIR Flow for Heater Location Ventilation AIR Ventilation Air From Inside BuildingCheck GAS Type InstallationInstallation Items Ventilation Air From OutdoorsColdest part of room Installing Heater to WallLocating Heater Attaching to wall stud Attaching to wall anchorLocate hardware packet behind left side door of heater Marking Screw LocationsMark two screw locations on wall as shown in Figure Attaching To Wall Anchor MethodConnecting to GAS Supply External Regulator With Vent Pointing DownChecking 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 Operating Heater For Your Safety Read Before LightingInstalling Refractory and Front Panel Make sure control knob of heater is in the OFF positionLighting Instructions What to do if YOU Smell GASInspecting Heater Burner Pilot AIR Inlet Cleaning MaintenanceODS/PILOT and Burner CabinetTroubleshooting Observed Problem Possible Cause RemedyContact local propane/LP gas company Assembly Goes out when control knob is Control knob not pressedProblem could be caused by Delayed ignition of burners Manifold pressure is too lowWhen heated, vapors from Turn heater off when using Noise when burner is litDirty or partially clogged Clean burner see Cleaning Turn off air supplyWhen Gas Pressure Is Too Low Technical ServiceService Publications Service Hints Gas leak. See WarningSpecifications SF30NT SF30PTLSF30NT, VSF30NT LSF30PT, VSF30PT Accessories Replacement PartsParts Central Illustrated Parts Breakdown Parts List LSF20PTWarranty Information Keep this WarrantyQUÉ Hacer SI Percibe Olor a GAS Modelos Modelos Para CocheraTabla DE Contenido Información DE Seguridad Desempaque Códigos LocalesIdentificación DEL Producto Características DEL ProductoConstrucción inusualmente sellada Aire Para Combustión VentilaciónCómo Procurar LA Ventilación Adecuada Espacio confinado y no confinadoAire Para Ventilación Aire del interior de la construcción para ventilaciónArtículos DE Instalación InstalaciónVerifique EL Tipo DE GAS Aire del exterior para ventilaciónEn áreas con mucho viento o Ubicación DEL CalentadorColocación del calentador en los tornillos de montaje Instalación DEL Calentador EN LA ParedDoble en anclaje de pared como se muestra en la figura Coloque el calentador en los tornillos de montajeConexión AL Suministro DE GAS Ventila apuntando hacia abajoPropano o gas LP Revisión DE LAS Conexiones DE GASGas natural Repare todas las fugas inmediatamenteAbra la válvula de cierre del equipo consulte la figura Instale el panel anterior y el refractarioInstalación del panel anterior y el refractario Instrucciones DE Encendido No intente encender ningún aparatoFuncionamiento DEL Inspección DEL CalentadorEntrada DE Aire AL Piloto DEL Quemador Inspección DELLimpieza Y Mantenimiento Como se muestra en la figuraSolución DE Problemas Causa Posible RemedioEl termopar está dañado Problema Observado Causa Posible RemedioBaja presión del gas Presione totalmente la perilla de controlSe enciende o se apaga El problema desapareceráCierre el suministro de aire Silbante cuando el quemadorServicio 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 Información DE Garantía Guarde Esta 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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