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101992
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 reposi-
tion the thermostat sensing bulb.
The thermostat sensing bulb is located on the gas valve assembly. 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 has been provided.
Tools needed: 5/16" hex driver or socket
Thermostat
Sensing Bulb
Gas Valve
Assembly
Figure 26 - Location of Gas Valve Assembly and Thermostat Sensing Bulb
1. Locate the gas valve assembly and thermostat sensing blub (see Figure 26).
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 29 for location.
2. The adhesive-backed mounting clip (see Figure 27) is attached to the thermostat sensing
bulb. Remove the adhesive-backed mounting clip.
Figure 27 - 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 28).
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. A crimped
capillary will not allow thermostat to operate properly. It cannot be repaired, the valve
must be replaced.
Figure 28 - Removing Thermostat Sensing Bulb
Retaining Clamp
Thermostat Sensing Bulb
Capillary
Screw