Optional Positioning Of; Thermostat Sensing Bulb; Specifications - Desa VUL18NR Owner's Operation And Installation Manual

OPTIONAL POSITIONING OF THERMOSTAT
(Thermostat-Controlled Models Only)
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 allows the
thermostat to keep the room temperature at
an ideal comfort level for most fireplace appli-
cations. If positioning the thermostat sensing
bulb elsewhere, follow these directions.
Tools needed: 5/16" hex driver or socket
1. Locate the gas valve assembly and ther-
mostat sensing bulb (see Figure 43).
2. With 5/16" hex driver or socket, loosen
the thermostat screw. Carefully slide the
thermostat sensing bulb out of the retain-
ing clamp (see Figure 44).
Note: Do not remove screw. Make sure
you tighten screw after removing thermo-
stat sensing bulb.
IMPORTANT: Do not force or bend ther-
mostat sensing bulb or capillary.
VUL18PT, VUL18PR
• Rating (Variable): 19,000/30,000 Btu/Hr
• Type Gas: Propane/LP
• Ignition: Electronic
• Manifold Pressure: 7.9" W.C.
• Inlet Gas Pressure (in. of water):
Max - 14" W.C., Min* - 11" W.C.
VUL18NT, VUL18NR
• Rating (Variable): 19,000/28,000 Btu/Hr
• Type Gas: Natural
• Ignition: Electronic
• Manifold Pressure: 3.4" W.C.
• Inlet Gas Pressure (in. of water):
Max - 10.5" W.C., Min* - 5" W.C.
122001-01C
SENSING bULb
3. The thermostat sensing bulb may be
Assembly and Thermostat Sensing Bulb
Screw

SPECIFICATIONS

VUL24PT, VUL30PT, VUL36PT,
VUL24PR, VUL30PR, VUL36PR
• Rating (Variable): 25,000/36,000 Btu/Hr
• Type Gas: Propane/LP
• Ignition: Electronic
• Manifold Pressure: 7.9" W.C.
• Inlet Gas Pressure (in. of water):
VUL24NT, VUL30NT, VUL36NT,
VUL24NR, VUL30NR, VUL36NR
• Rating (Variable): 25,000/36,000 Btu/Hr
• Type Gas: Natural
• Ignition: Electronic
• Manifold Pressure: 3.4" W.C.
• Inlet Gas Pressure (in. of water):
*For purpose of input adjustment
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located to the lower right front side of
fireplace. Place bulb in an area that will
be close to room temperature when log
set is operating.
Thermostat
Sensing Bulb
Figure 43 - Location of Gas Valve
Retaining Clamp
Figure 44 - Removing Thermostat
Sensing Bulb
Max - 14" W.C., Min* - 11" W.C.
Max - 10.5" W.C., Min* - 5" W.C.
(Unit Will
Differ From
Illustration)
Gas Valve
Assembly
Capillary
(Unit Will
Differ From
Illustration)
Thermostat
Sensing Bulb
33