Desa VSF30PT, LSFG20NT installation manual Troubleshooting

Page 17

TROUBLESHOOTING

Continued

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

 

 

 

 

 

ODS/pilot lights but flame

1. Control knob not fully pressed in

1.

Press in control knob fully

goes out when control knob is

2. Control knob not pressed in

2. After ODS/pilot lights, keep con-

released

3.

long enough

3.

trol knob pressed in 30 seconds

 

Equipment shutoff valve not

Fully open equipment shutoff

 

4.

fully open

4.

valve

 

Thermocouple connection

Hand tighten until snug, then

 

5.

loose at control valve

5.

tighten 1/4 turn more

 

Pilot flame not touching ther-

A) Contact local natural or

 

 

mocouple, which allows ther-

 

propane/LP gas company

 

 

mocouple to cool, causing

 

B) Clean ODS/pilot (see

 

 

pilot flame to go out. This

 

Cleaning and Maintenance,

 

 

problem could be caused by

 

page 15) or replace ODS/pilot

 

 

one or both of the following:

 

assembly

 

 

A) Low gas pressure

 

 

 

 

 

B) Dirty or partially clogged

 

 

 

 

6.

ODS/pilot

6.

Replace pilot assembly

 

Thermocouple damaged

 

7.

Control valve damaged

7.

Replace control valve

 

8.

Safety interlock system has

8.

Wait one minute for safety in-

 

 

been triggered (thermostat

 

terlock system to reset. Repeat

 

 

models only)

 

ignition operation

 

 

 

 

 

Burner(s) does not light after

1. Burner orifice(s) is clogged

1.

Clean burner orifice(s) (see

ODS/pilot is lit

 

 

 

Cleaning and Maintenance,

 

 

 

 

page 15) or replace burner

 

2.

Inlet gas pressure is too low

2.

orifice(s)

 

Contact local natural or pro-

 

 

 

 

pane/LP gas company

 

 

 

 

 

Delayed ignition of burner(s)

1. Manifold pressure is too low

1.

Contact local natural or pro-

 

2.

Burner orifice(s) is clogged

2.

pane/LP gas company

 

Clean burner orifice(s) (see

 

 

 

 

Cleaning and Maintenance,

 

 

 

 

page 15) or replace burner

 

 

 

 

orifice(s)

 

 

 

 

 

Burner backfiring during com-

1. Burner orifice(s) is clogged or

1.

Clean burner orifice(s) (see

bustion

 

damaged

 

Cleaning and Maintenance,

 

 

 

 

page 15) or replace burner

 

2.

Burner damaged

2.

orifice(s)

 

Replace burner

 

3.

Gas regulator defective

3.

Replace gas regulator

116307-01C

www.desatech.com

17

Image 17
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.