Desa LSFG20NT 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

2.

nance, page 15)

 

Replace gas regulator

 

3.

Clogged or dirty burner

3.

Clean burner (see Cleaning

 

4.

Air blowing into heater

4.

and Maintenance, page 15)

 

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

 

2.

is cold

 

2.

for a minute

 

Air in gas line

Operate burner until air is

 

 

 

 

 

removed from line. Have gas

 

 

 

 

 

line checked by local natural

 

3.

Air passageways on heater

3.

or propane/LP gas company

 

Observe minimum installation

 

4.

blocked

 

4.

clearances (see Figure 4, page 8)

 

Dirty or partially clogged

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)

2.

able

 

2.

ventilation

 

Low line pressure

Contact local natural or pro-

 

3.

O D S / pi l o t

i s pa rt i a l l y

3.

pane/LP gas company

 

Clean ODS/pilot (see Cleaning

 

 

clogged

 

 

and Maintenance, page 15)

18

www.desatech.com

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Contents Residential Models SF20NT, SF20PTGarage Models Table of Contents Safety InformationSafety Information Local Codes Safety InformationProduct Features Product IdentificationAir For Combustion Ventilation Providing Adequate VentilationDetermining FRESH-AIR Flow for Heater Location AIR for Combustion Ventilation Ventilation AIRVentilation Air From Inside Building Check GAS Type InstallationInstallation Items Ventilation Air From OutdoorsInstalling Heater to Wall Locating HeaterPlacing Heater On Mounting Screws Connecting to GAS SupplyMarking Screw Locations Locate hardware packet behind left side door of heaterNatural Gas Propane/LPTest Pressures Equal To or Less Than 1/2 Psig 3.5 kPa Pressure Testing Heater Gas ConnectionsChecking GAS Connections Open equipment shutoff valve see FigureFor Your Safety Read Before Lighting Installing Refractory and Front PanelOperating Heater Shutting Off Heater Lighting InstructionsTo Turn OFF GAS To Appliance Shutting Off Burner Only pilot stays litOperation Manual Lighting ProcedureInspecting Heater Pilot Flame PatternBurner Pilot Air Inlet Cleaning MaintenanceODS/PILOT and Burner CabinetTroubleshooting Observed Problem Possible Cause RemedyTroubleshooting When 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 WarningVSFG20NT VSGF20PT SpecificationsLSF20NT, LSFG20NT, VSF20NT LSF20PT, LSFG20PT, VSF20PT SF30NT SF30PTAccessories Replacement PartsParts Central Illustrated Parts Breakdown Parts List Warranty Information Keep this WarrantyConsumidor Conserve este manual para referencias futuras ModelosModelos Para Cochera Tabla de contenido Información de seguridadInformación 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 Combustión Ventilación Aire Para VentilaciónAire del interior de la construcción para Ventilación Instalación Verifique EL Tipo DE GASArtículos DE Instalación De las partes anterior, superior Ubicación DEL CalentadorDonde cortinas, muebles, ropa Fuertes corrientes de aireColocación 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 abajoRevisión DE LAS Conexiones DE GAS Gas naturalRepare todas las fugas inmediatamente Instalación del panel anterior y el refractario Abra la válvula de cierre del equipo consulte la figuraInstale el panel anterior y el refractario Instale un difusor frontal como se muestra en la figuraFuncionamiento del Calentador Instrucciones DE EncendidoFuncionamiento DEL Inspección del CalentadorCómo Cerrar EL Suministro DE GAS AL Aparato Encendido ManualInspección del Limpieza y MantenimientoPatrón DE LA Llama DEL Calentador SF30NT EspecificacionesGabinete LSF30NT, VSF30NTSolución de problemas Causa Posible RemedioSolución DE Problemas Combustión El problema desapareceráLlama amarilla durante la No hay suficiente aire En el quemadorConsejos para servicio Servicio técnicoPublicaciones de servicio Al inicio de la páginaCentral de piezas AccesoriosPiezas de repuesto Válvula DE Cierre DEL Equipo GA5010Clasificación ilustrada de piezas Lista DE Piezas Información de garantía Guarde Esta 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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