Desa CDL3924PT - Manual (Page 25)

www.desatech.com 111347-01E 25
OPTIONAL POSITIONING
OF THERMOSTAT
SENSING BULB
For Masonry and Factory-Built Metal
Fireplace
If your log set cycles to pilot, but the room tem-
perature 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 thermo-
stat sensing bulb elsewhere, an adhesive-backed
mounting clip is available (see Figure 31).
Tools needed: 1/4" hex driver or socket
1. Remove logs. Locate the gas valve assembly
and thermostat sensing bulb (see Figure 32).
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 33).
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 34 for location. If you have
a factory-built metal fireplace, see Figure 35
for location. If your fireplace has glass doors,
position sensing bulb directly behind door gap
on right bottom side (see Figure 36).
Thermostat
Sensing Bulb
Figure 32 - Location of Gas Valve
Assembly and Thermostat Sensing Bulb
Gas Valve
Assembly
Figure 31- Adhesive-backed Mounting
Clip
Figure 33 - Removing Thermostat
Sensing Bulb
Thermostat
Screw
Retaining
Clamp
Thermostat
Sensing Bulb
Capillary
Adhesive-
Backed
Mounting Clip
Figure 34 - Locating
Thermostat
Sensing Bulb on
Masonry Fireplace
Thermostat
Sensing
Bulb
Figure 35 - Locating
Thermostat Sensing
Bulb on Factory-
built Metal Fireplace
Adhesive-
backed
Mounting
Clip
Glass
Doors
Thermostat
Sensing Bulb
Figure 36 - Installing Thermostat Sensing
Bulb behind Glass Doors