Desa VS18NR, CFS18NR 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 pattern. Figure 26 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touch- ing the thermocouple. This will cause the thermocouple to cool. When the thermo- couple 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

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, fol- low 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 26 - Incorrect Pilot Flame Pattern

Figure 28 - Incorrect Front Burner Flame

Pattern

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Contents What to do if YOU Smell GAS OWNER’S Operation and Installation ManualDesa International Unvented Natural GAS LOG Heater Safety InformationRemote Control Accessories Product FeaturesProduct Identification Local CodesProviding 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 Inside Ventilation AIRBuilding Ventilation Air From OutdoorsInstallation Clearances InstallationCheck GAS Type Minimum Fireplace Clearance to Combustible MaterialsIf Not Using Mantel If Using MantelMinimum Noncombustible Material Clearances Operation,Mantel Clearances Determining Minimum Mantel Clearance When Using a HoodFloor Clearances Determining Minimum Mantel ClearancesInstalling Heater Base Assembly Installing Damper Clamp Accessory for Vented OperationInstallation Items Needed Chimney Minimum Permanent Height ft Flue Opening sq. insAttaching Flexible Gas Hose to Heater Gas Regulator Connecting to GAS SupplyPressure Testing gas Supply Piping system Pressure Testing Heater Gas ConnectionsChecking GAS Connections Test Pressures Equal To or Less Than 1/2 PsigInstalling Front Logs #1L and #1R Installing LogsLighting Instructions For Your Safety Read Before LightingOperating Heater Optional Remote Operation Manual Lighting ProcedureTo Turn OFF GAS to Appliance Shows Temperature Setting Front Burner Flame Pattern Inspecting BurnersPilot Flame Pattern Logs Cleaning and MaintenanceCleaning Burner Injector Holder and Pilot AIR Inlet Hole Observed Problem Possible Cause Remedy TroubleshootingSee Wiring Diagram, Above Gas leak. See Warning statementWiring Diagram Replacement Parts SpecificationsService Hints Technical ServiceAccessories Variable Control CFS18NR VS18NR VS24NR VS30NR Illustrated Parts BreakdownCFS18NR VS18NR VS24NR VS30NR Parts ListInternational Warranty Information