Inspecting Burners - Desa VUL18NR Owner's Operation And Installation Manual

Auto Shutoff Feature
1. If the average room temperature reaches
a range of 82° F (28° C) to 92° F (33° C),
the hand-held remote control will perform
a safety override and shut the fireplace
off. This feature is not available in the
MANU mode.
2. The receiver continuously receives sig-
nals from the hand-held remote to control
the room temperature. If the hand-held
remote is misplaced, obstructed or for any
reason cannot transmit to the receiver, the
receiver will shut off the fireplace. This will
occur in 8 or more minutes depending
upon location of remote transmitter and
strength of batteries.
Check pilot flame pattern and burner flame
patterns often.
PILOT FLAME PATTERN
Figure 38 shows a correct pilot flame pattern.
Figure 39 shows an incorrect pilot flame pat-
tern. The incorrect pilot flame is not touching
the thermocouple. This will cause the thermo-
couple to cool. When the thermocouple cools,
the heater will shut down.
If pilot flame pattern is incorrect, as shown
in Figure 39
• turn heater off (see To Turn Off Gas to Appli-
ance, page 22 [Thermostatically-Controlled
Models] or page 24 [Remote-Ready Mod-
els])
• see Troubleshooting, page 29
Note: The pilot flame on natural gas units will
have a slight curve, but flame should be blue
and have no yellow or orange color.
Thermocouple
Figure 38 - Correct Pilot Flame Pattern
(Your pilot may vary from pilots shown)
26
OPERATION
REMOTE-READy MODELS

INSPECTING bURNERS

Pilot Burner
Thermocouple
www.desatech.com
Continued
Key Pad Lock Feature
This feature allows the user to lock/unlock the
keypad on the hand-held remote in the MANU
or AUTO mode to prevent inadvertent op-
eration (i.e. children operating the hand-held
remote control, etc.). The keypad is locked in
either on or off. Press the POWER and LOCK
buttons together to turn the unit on or off.
Thermocouple
Figure 39 - Incorrect Pilot Flame Pattern
(Your pilot may vary from pilots shown)
FRONT bURNER FLAME PATTERN
Figure 39, page 27, shows correct front burner
flame pattern. Figure 40, page 27, shows
incorrect front burner flame pattern. The
incorrect burner flame pattern shows yellow
tipping at top of blue flame.
WARNING: If yellow tipping
occurs, your heater could pro-
duce increased levels of carbon
monoxide. If front burner flame
pattern shows yellow tipping,
follow instructions at bottom of
this page. Yellow flame on rear
burner is normal.
Pilot Burner
Thermocouple
122001-01C