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103425
UNVENTED (VENT-FREE) GAS LOG HEATER
Adhesive-backed
Mounting Clip
Figure 34 - Locating Thermostat Sensing
Bulb on Masonry Fireplace
Thermostat
Sensing Bulb
Adhesive-
backed
Mounting Clip
Thermostat
Sensing
Bulb
Figure 35 - Locating Thermostat Sensing
Bulb on Factory-built Metal Fireplace
Adhesive-
backed
Mounting
Clip
Glass Doors
Figure 36 - Installing Thermostat Sensing
Bulb behind Glass Doors
Thermostat
Sensing
Bulb
Capillary
Thermostat
Sensing
Bulb
Do Not Crimp
Capillary
Adhesive-
backed
Mounting
Clip
Figure 37 - Positioning the Thermostat
Sensing Bulb in the Vertical Position
with the Capillary at the Bottom
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 on
the gas valve assembly. This location al-
lows the thermostat to keep the room tem-
perature at an ideal comfort level for most
fireplace applications. For positioning the
thermostat sensing bulb elsewhere, an adhe-
sive-backed mounting clip is available.
Tools needed:
• 5/16" hex driver or socket
Thermostat
Sensing Bulb
Gas Valve
Assembly
Figure 31 - Location of Gas Valve
Assembly and Thermostat Sensing Bulb
1. Locate the gas valve assembly and ther-
mostat sensing bulb (see Figure 31).
2. With 5/16" hex driver or socket, loosen
the thermostat screw. Carefully slide
the thermostat sensing bulb out of the
retaining clamp (see Figure 33).
Note:
Do not remove the screw. Make
sure you tighten the screw after remov-
ing the thermostat sensing bulb.
IMPORTANT:
Do not force or bend the
thermostat sensing bulb or capillary. A
crimped capillary will not allow ther-
mostat to operate properly. It cannot be
repaired, the valve must be replaced.
3. The thermostat sensing bulb may be
located to the lower right front side of
fireplace. Determine location of sens-
ing bulb, but do not mount sensing bulb
until step 5. If you have a masonry fire-
place, see Figure 34 for location.
If you have a factory-built metal fire-
place, see Figure 35 for location.
If your fireplace has glass doors, posi-
tion sensing bulb directly behind door
gap on right bottom side (see Figure 36).
Figure 32 - Adhesive-backed Mounting
Clip
Figure 33 - Removing Thermostat Sensing
Bulb
Capillary
Retaining
Clamp
Thermostat
Sensing
Bulb
Screw
4. The mounting clip must be a minimum
of 3" from bottom of fireplace to pre-
vent crimping of capillary. Once you
have decided on a location, clean the
area thoroughly. Remove the paper
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 bot-
tom (see Figure 37). Slide the thermo-
stat sensing bulb into the clip.
IMPORTANT:
Do not crimp capillary.