Desa VSFG20PT, SPC20PT Inspecting Heater, Thermostat Control Operation, Manual Lighting Procedure

Page 14

OPERATING HEATER

Continued

THERMOSTAT CONTROL

OPERATION

The thermostatic control used on these models differs from standard thermostats. Standard thermostats simply turn on and off the burner. The thermostat used on this heater senses the room temperature. At times the room may exceed the set temperature. If so, the burner will shut off. The burner will cycle back on when room temperature drops below the set temperature. The control knob can be set to any heat level between 1 and 5. This adjusts the amount of gas flow to the burner that increases or decreases the burner flame height. Note: The thermostat sensing bulb measures the temperature of air near the heater cabinet. This may not always agree with room tem- perature (depending on housing construction, installation location, room size, open air tem- peratures, etc.) Frequent use of your heater will let you determine your own comfort levels.

MANUAL LIGHTING

PROCEDURE

1.Remove front panel (see Figure 10, page 9).

2.Follow steps 1 through 7 under Lighting Instructions, page 13.

3.With control knob pressed in, strike match. Hold match to pilot until pilot lights.

4.Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds, release control knob. Now follow step 9, under Lighting Instructions, page 13.

5.Replace front panel.

INSPECTING HEATER

Check pilot flame pattern and burner flame pat- tern often.

PILOT FLAME PATTERN

Figure 18 shows a correct pilot flame pattern. Figure 19 shows an incorrect pilot flame pattern. The incor- rect pilot flame is not touching the thermocouple. This will cause the thermocouple to cool. When the thermocouple cools, the heater will shut down.

If pilot flame pattern is incorrect, as shown in Figure 19

•turn heater off (see To Turn Off Gas to Ap- pliance, page 13)

•see Troubleshooting, page 16

Note: The pilot flame on natural gas units will have a slight curve, but flame should be blue and have no yellow or orange color.

Thermocouple

Blue Pilot Flame

 

 

Pilot Burner

Figure 18 - Correct Pilot Flame Pattern

Thermocouple

Yellow Pilot Flame

Pilot Burner

Figure 19 - Incorrect Pilot Flame Pattern

BURNER FLAME PATTERN

WARNING: If yellow tipping occurs, your heater could pro- duce increased levels of carbon monoxide.

NOTICE: Do not mistake orange flames with yellow tipping. Dirt or other fine particles enter the heater and burn causing brief patches of orange flame.

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Contents What to do if YOU Smell GAS Residential Models Garage ModelsTable of Contents Safety Information Unpacking Product FeaturesLocal Codes Determining FRESH-AIR Flow for Heater Location AIR for Combustion VentilationProviding Adequate Ventilation 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 anchorPlacing Heater On Mounting Screws Connecting to GAS SupplyMarking Screw Locations Locate hardware packet behind left side door of heaterBe upstream from heater see Figure Protects it from freezing rain or sleet30,000 Btu/Hr Models 1/2 or greater Test 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 Operating Heater For Your Safety Read Before LightingInstalling Refractory and Front Panel Lighting Instructions Turn control knob clockwise to the OFF positionThermostat Control Operation Manual Lighting ProcedureInspecting Heater Pilot Flame PatternBurner Pilot AIR Inlet Cleaning MaintenanceODS/PILOT and Burner CabinetContact local propane/LP gas company TroubleshootingObserved Problem Possible Cause Remedy 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 WarningLSF30NT, VSF30NT LSF30PT, VSF30PT SpecificationsSF30NT SF30PT Parts Central AccessoriesReplacement Parts Illustrated Parts Breakdown Parts List Warranty 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 abajoGas natural Revisión DE LAS Conexiones DE GASPruebas de presiones mayores a 1/2 PSI 3.5 kPa 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 figuraInstrucciones 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 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 Información DE Garantía Guarde Esta Garantía
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