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107068-01D
For more information, visit www.desatech.com
For more information, visit www.desatech.com
24
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 else-
where, an adhesive-backed mounting clip is available.
Tools needed: 1/4" hex driver or socket
1. Remove logs. Locate the gas valve assembly and thermostat
sensing bulb (see Figure 33).
2. With 1/4" hex driver or socket, loosen the thermostat screw.
Carefully slide the thermostat sensing bulb out of the retaining
clamp (see Figure 35).
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 5. If you have a masonry
fireplace, see Figure 36 for location. If you have a factory-
built metal fireplace, see Figure 37 for location. If your fire-
place has glass doors, position sensing bulb directly behind
door gap on right bottom side (see Figure 38).
4. The mounting clip must be a minimum of 3" from bottom of
fireplace to prevent crimping of capillary. Once you have de-
cided on a location, clean the area thoroughly. Remove the pa-
per backing from the adhesive on back of mounting clip. Press
the clip into the new location so that the thermostat sensing bulb
will be positioned vertically with the capillary at the bottom
(see Figure 39). Slide the thermostat sensing bulb into the clip.
IMPORTANT:
Do not crimp capillary.
OPTIONAL POSITIONING OF THERMOSTAT SENSING BULB
Thermostat
Sensing Bulb
Figure 33 - Location of Gas Valve Assembly and Thermostat
Sensing Bulb
Figure 34 - Adhesive-
backed Mounting Clip
Figure 35 - Removing Thermostat
Sensing Bulb
Gas Valve
Assembly
Mounting
Bracket
Thermostat Screw
Retaining
Clamp
Thermostat
Sensing Bulb
Capillary
Adhesive-backed
Mounting Clip
Figure 36 - Locating
Thermostat Sensing Bulb on
Masonry Fireplace
Thermostat
Sensing Bulb
Thermostat
Sensing Bulb
Figure 37 - Locating
Thermostat Sensing Bulb on
Factory-built Metal Fireplace
Glass Doors
Figure 38 - Installing
Thermostat Sensing Bulb
behind Glass Doors
Thermostat Sensing Bulb
Capillary
Thermostat
Sensing Bulb
Do Not Crimp
Capillary
Adhesive-
backed
Mounting
Clip
Figure 39 - Positioning the
Thermostat Sensing Bulb in
the Vertical Position with the
Capillary at the Bottom
Adhesive-backed
Mounting Clip
Adhesive-backed
Mounting Clip