Desa VS24PRA, CFS18PRA Inspecting Burners, Pilot Flame Pattern, Front Burner Flame Pattern

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OWNER’S MANUAL

INSPECTING

BURNERS

Check pilot flame pattern and burner flame patterns often.

PILOT FLAME PATTERN

Figure 25 shows a correct pilot flame pat- tern. Figure 26 shows an incorrect pilot flame pattern. The incorrect 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 26

turn heater off (see To Turn Off Gas to Appliance, page 15)

seeTroubleshooting, pages 19 through 21

Pilot Burner

Thermocouple

Figure 25 - Correct Pilot Flame Pattern

Pilot Burner

Thermocouple

Figure 26 - Incorrect Pilot Flame Pattern

FRONT BURNER FLAME PATTERN

Figure 27 shows correct front burner flame pattern. Figure 28 shows incorrect front burner flame pattern. The incorrect burner flame pattern shows yellow tipping at top of blue flame.

WARNING: If yellow tipping occurs, your heater could pro- duce increased levels of carbon monoxide. If front burner flame pattern shows yellow tipping, follow instructions at bottom of this page. Yellow flame on rear burner is normal.

NOTICE: Do not mistake orange flames with yellow tipping. Dirt or other fine particles are burned by heater, causing brief patches of orange flame.

If front burner flame pattern is incorrect, as shown in Figure 28

turn heater off (see To Turn Off Gas to Appliance, page 15)

seeTroubleshooting, pages 19 through 21

Figure 27 - Correct Front Burner Flame Pattern

Yellow Tipping At Top

of Blue Flame

Figure 28 - Incorrect Front Burner Flame Pattern

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Contents What to do if YOU Smell GAS Desa InternationalDesa International Unvented PROPANE/LP GAS LOG Heater Safety InformationOptional Remote Control Accessories Product FeaturesUnpacking Product IdentificationProviding Adequate Ventilation AIR for Combustion and VentilationUnusually Tight Construction Confined and Unconfined SpaceDetermining if You Have a Confined or Unconfined Space AIR for Combustion VentilationDetermining FRESH-AIR Flow for Heater Location Ventilation Air From Outdoors Ventilation AIRVentilation Air From Inside Building Installation Clearances InstallationCheck GAS Type Vent-Free Operation OnlyMinimum Noncombustible Material Clearances If Not Using Mantel If Using MantelMantel Clearances Determining Minimum Mantel Clearance When Using a HoodFloor Clearances Determining Minimum Mantel ClearanceInstalling Heater Base Assembly Installing Damper Clamp Accessory for Vented OperationInstallation Items Needed Area of Various Standard Round FluesConnecting to GAS Supply Pressure Testing Heater Gas Connections Pressure Testing gas Supply Piping systemChecking GAS Connections Test Pressures In Excess Of 1/2 PsigInstalling Front Log #1 Installing LogsLighting Instructions For Your Safety Read Before LightingOperating Heater To Turn OFF GAS to Appliance Manual Lighting ProcedureShutting Off Heater Shutting Off Burners Only pilot stays litThermostat Control Operation Optional Remote OperationGhrc Operation Ghrct OperationFront Burner Flame Pattern Inspecting BurnersPilot Flame Pattern Replacement Parts Cleaning and MaintenanceObserved Problem Possible Cause Remedy TroubleshootingSee Wiring Diagram, Above Gas leak. See Warning statementVariable Control CFS18PRA, VS18PRA VS24PRA, VS30PRA Illustrated Parts BreakdownCFS18PRA, VS18PRA VS24PRA, VS30PRA Parts ListWiring Diagram SpecificationsTechnical Service Service HintsAccessories Warranty Information