Desa Inspecting Burners, Thermostat Control Operation, Pilot Flame Pattern, Main Burner

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OPERATING HEATER

Continued

TO TURN OFF GAS

TO APPLIANCE

Shutting Off Heater

Turn control knob clockwise to the OFF position.

Shutting Off Burners Only (pilot stays lit)

Turn control knob clockwise to the PILOT position.

THERMOSTAT CONTROL

OPERATION

The thermostat control knob can be set to any comfort level between HI and LO. The ther- mostat will gradually modulate the heat output and flame height from higher to lower settings or pilot, in order to maintain the comfort level you select. The ideal comfort setting will vary by household depending upon the amount of space to be heated, the output of the central heating system, etc.

Note: Selecting the HI setting with the control knob will cause the burner to remain fully on, without modulating down in most cases.

MANUAL LIGHTING

PROCEDURE

1.Follow steps 1 through 5 under Lighting Instructions on page 21.

2.Depress control knob and light pilot with match.

3.Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds, release control knob. Now follow step 8 under Lighting Instructions, page 21.

INSPECTING BURNERS

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

PILOT FLAME PATTERN

Figure 30 shows a correct pilot flame pattern. Figure 31 shows an incorrect pilot flame pat- tern. 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 31

turn heater off (see To Turn Off Gas to Appli- ance, page 20 [manually-controlled models] or page 22 [thermostatically-controlled model])

see Troubleshooting, page 25

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.

Pilot Burner

Pilot Burner

Thermocouple

 

Propane/LP

Natural Gas

Figure 30 - Correct Pilot Flame Pattern

Pilot Burner

Pilot Burner

Thermocouple

 

Propane/LP

Natural Gas

Figure 31 - Incorrect Pilot Flame Pattern

BURNER PRIMARY AIR HOLES

Air is drawn into the burner through the holes in the fitting at the entrance to the burner. These holes may become blocked with dust or lint. Periodically inspect these holes for any blockage and clean as necessary. Blocked air holes will create soot.

MAIN BURNER

Periodically inspect all burner flame holes with the heater running. All slotted burner flame holes should be open with yellow flame present. All round burner flame holes should be open with a small blue flame present. Some burner flame holes may become blocked by debris or rust, with no flame present. If so, turn off heater and let cool. Remove blockage, blocked burner flame holes will create soot.

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Contents 24 Variable MANUALLY-CONTROLLED Models Patent PendingTable of Contents Safety Information Product Identification Unpacking Product FeaturesLocal Codes AIR for Combustion VentilationUnusually Tight Construction Providing Adequate VentilationDetermining FRESH-AIR Flow for Fireplace Location Determining if You Have a Confined or Unconfined SpaceVentilation Air From Inside Building Ventilation AIRVentilation Air From Outdoors Installation Check GAS TypeFront Rear Log Size Side Wall CeilingMinimum Firebox Size Minimum Noncombustible Material ClearancesMantel Clearances Log SetFloor Clearances Log SetInstalling Heater Base Installing Damper Clamp Accessory for Vented OperationAssembly Connecting to GAS Supply Installation Items NeededPointing Down NaturalTest Pressures In Excess Of 1/2 Psig 3.5 kPa Checking GAS ConnectionsTest Pressures Equal To or Less Than 1/2 Psig 3.5 kPa Pressure Testing Heater Gas Connections Installing Back LogInstallation Operating Heater What to do if YOU Smell GASLighting Instructions Slightly depress and turn control knob counVariable Control Operation Manual Lighting ProcedureTo Turn OFF GAS To Appliance STOP! Read the safety information, page 20, column Pilot Flame Pattern Inspecting BurnersThermostat Control Operation Burner Primary AIR HolesODS/PILOT and Burner Cleaning MaintenanceBurner Injector Holder and Pilot AIR Inlet Hole Service Hints Technical ServiceReplacement Parts Troubleshooting Observed Problem Possible Cause RemedyODS/pilot lights but flame goes See Cleaning and Mainte Gas leak. See Warning Statement aboveOptional Positioning Thermostat Sensing Bulb For Masonry and FACTORY- Built Metal FireplaceSpecifications Equipment Shutoff Valve GA5010 AccessoriesParts Central Fireplace HoodIllustrated Parts Breakdown Parts List Variable MANUALLY-CONTROLLED Winchester OAK ModelsIllustrated Parts Breakdown THERMOSTATICALLY-CONTROLLED Royal English OAK Models Keep this Warranty Warranty InformationLimited Warranty VENT-FREE GAS Fireplace

CGS2718PA, CGS2718NA, CGS3124PA, CGS3124NA, SGS3124PA, SGS3124NA,CLD3018PTA, CLD3018NTA, CLD3924NTB, CLD3924PTB specifications

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