Optional Positioning of Thermostat Sensing Bulb

For Masonry and Factory- built Metal Fireplace

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 reposition the thermostat sensing bulb.

The thermostat sensing bulb is located near the gas valve assembly on the mounting bracket. This location allows the 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 mounting clip is available.

Tools needed: 1/4" hex driver or socket

1.Remove logs. Locate the gas valve as- sembly and thermostat sensing bulb (see Figure 37).

2.With 1/4" hex driver or socket, loosen the thermostat screw. Carefully slide the ther- mostat sensing bulb out of the retaining clamp (see Figure 39).

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.

3.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 4. If you have a masonry fireplace, see Figure 40 for location. If you have a factory-built metal fireplace, see Figure 41 for location. If your fireplace has glass doors, position sensing bulb directly behind door gap on right bottom side (see Figure 42).

4.The mounting clip must be a minimum of 3" from bottom of fireplace to prevent crimping of capillary. Once you have decided on a location, clean the area

Gas Valve

Assembly

Mounting

Thermostat

Bracket

Sensing

 

Bulb

Figure 37 - Location of Gas Valve

Assembly and Thermostat Sensing Bulb

Figure 38 - Adhesive-backed Mounting Clip

Capillary

Thermostat Screw

 

Retaining

 

Clamp

 

 

Thermostat

 

Sensing

 

Bulb

Figure 39 - Removing Thermostat

Sensing Bulb

Thermostat

Sensing Bulb

Adhesive-backed

Mounting Clip

Figure 40 - Locating Thermostat Sensing

Bulb on Masonry Fireplace

Thermostat

Sensing Bulb

Adhesive- backed Mounting Clip

Figure 41 - Locating Thermostat Sensing Bulb on Factory-built Metal Fireplace

Thermostat

Sensing Bulb

Adhesive-backed

Mounting Clip

Glass Doors

Figure 42 - Installing Thermostat Sensing

Bulb Behind Glass Doors

113097-01L

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