Desa NATURAL GAS LOG HEATER installation manual Optional, Positioning, Sensing Bulb

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	OPTIONAL	If your log set cycles to pilot, but the room temperature drops to a lower than
		ideal comfort level before the log set comes back on, you may want to reposi-
	POSITIONING
		tion the thermostat sensing bulb.
	OF THERMOSTAT	The thermostat sensing bulb is located on the gas valve assembly. This location allows the

	SENSING BULB	thermostat to keep the room temperature at an ideal comfort level for most fireplace
		applications. For positioning the thermostat sensing bulb elsewhere, an adhesive-backed
	For Masonry and	mounting clip has been provided.
		Tools needed: 5/16" hex driver or socket
	Factory-built
		1. Locate the gas valve assembly and thermostat sensing blub (see Figure 28).
	Metal Fireplace

Gas Valve

Assembly

Thermostat

Sensing Bulb

Figure 28 - Location of Gas Valve Assembly and Thermostat Sensing Bulb

2.The adhesive-backed mounting clip (see Figure 29) is attached to the thermostat sensing bulb. Remove the adhesive-backed mounting clip.

Figure 29 - Adhesive-backed Mounting Clip

3.With 5/16" hex driver or socket, loosen the thermostat screw. Carefully slide the thermo- stat sensing bulb out of the retaining clamp (see Figure 30).

Note: Do not remove the screw. Make sure you tighten the screw after removing the thermostat sensing bulb.

IMPORTANT: Do not force or bend the thermostat sensing bulb or capillary.

Capillary

Thermostat Sensing Bulb

Screw

Retaining Clamp

Figure 30 - Removing Thermostat Sensing Bulb
4. The thermostat sensing bulb may be located to the lower right front side of fireplace.
Determine location of sensing bulb, but do not mount sensing bulb until step 5. If you
have a masonry fireplace, see Figure 31 for location.	29
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Contents What to do if YOU Smell GAS OWNER’S Operation and Installation ManualContents Safety Information Information SafetySafety Device Local Codes Unpacking Product FeaturesProduct Identification OperationProviding Adequate Ventilation AIR for CombustionVentilation Determining if You Have a Confined or Unconfined Space AIR for Combustion and VentilationDetermining AIR Flow for Heater Location Ventilation AIR AIR forCombustion Check GAS Type InstallingLOG Sizing Requirements To Combustible MaterialsAnces from floor, ceiling, and adjoining wall Minimum Wall and Ceiling Clearances see FigureMinimum Non Combustible Material Clearances Accessories,For Vented Operation, InstallingFloor Clearances Attaching Damper Clamp Installing Damper Clamp Accessory for Vented OperationInstallation Items Needed Installing Heater Base AssemblyAttaching Flexible Gas Hose to Heater Gas Regulator Installation Items Needed Connecting to GAS SupplyGas Connection Checking GAS ConnectionsTest Pressures Equal To or Less Than 1/2 Psig Pressure Testing Heater Gas ConnectionsInstalling Front Log Installing LogsOperating Heater For Your Safety Read Before LightingThermostat-Controlled Models Only OperatingHeater Operating Heater Models Front Burner Flame Pattern Inspecting BurnersPilot Flame Pattern Logs Trouble ShootingODS/PILOT and Burners TROUBLE- Shooting Cleaning and MainteTrouble Gas leak. See Warning Sensing Bulb OptionalPositioning For Masonry Factory-built Metal Fireplace Optional Positioning Thermostat Sensing BulbService ServiceTechnical HintsParts Not Under Warranty Replacement PartsParts Under Warranty Valve GA5010 AccessoriesHood GA6050 Hood GA6052Illustrated Parts Break Down Description QTY Parts ListThermostat Controlled Models Parts List 101308 101308 Keep this Warranty Warranty Information