Desa EFS33NRB - Manual (Page 20)

www.desatech.com 113132-01A 20
2. The receiver continuously receives signals
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 after 8 minutes.
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 opera-
tion (i.e. children operating the hand-held re-
mote control, etc.). The keypad is locked in ei-
ther on or off. Press the POWER and LOCK
buttons together to turn the unit on or off.
OPTIONAL BLOWER
OPERATION
WARNING: This fireplace has
a three-prong, grounded electri-
cal plug. This plug helps protect
you against electrical shock.
Only connect plug to a properly
grounded, three-prong recep-
tacle. Do not cut or remove the
grounding prong from this plug.
Locate the blower switch by opening lower lou-
ver on fireplace. Blower switch is located at
lower left inside louver door.
The GA3650TB thermostat-controlled blower
has a variable speed control with an ON/OFF
switch. The blower will start when the thermo-
stat senses a sufficient increase in firebox tem-
perature. The GA3750A variable speed blower
also has an ON/OFF switch built into the vari-
able speed control.
Note for GA3650TB Only: If you are using
GA3650TB blower, your fireplace and blower
will not turn on and off at the same time. The
fireplace may run for several minutes before
the blower turns on. After the heater modulates
to the pilot position, the blower will continue to
run. The blower will shut off after the firebox
temperature decreases.
Note: It is safe to operate fireplace with blower
turned off. However, the blower helps distrib-
ute heated air from the fireplace.
Follow installation instructions included with
the blower accessory.
OPERATING FIREPLACE
Continued
INSPECTING BURNERS
Check pilot flame pattern and burner flame pat-
terns often.
PILOT FLAME PATTERN
Figure 34 shows a correct pilot flame pattern. Fig-
ure 35 shows an incorrect pilot flame pattern. The
incorrect pilot flame is not properly heating the
thermocouple. When the thermocouple cools, the
heater will shut down.
If pilot flame pattern is incorrect, as shown in
Figure 35
• turn heater off (see To Turn Off Gas to Appli-
ance, page 18)
• see Troubleshooting, pages 23 through 26
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.
Figure 34 - Correct Pilot Flame Pattern
Figure 35 - Incorrect Pilot Flame Pattern
Pilot Burner
Thermocouple
Thermocouple
Pilot Burner
MAIN BURNER
Periodically inspect all burner flame holes with
the heater running. All slotted burner flame holes
should be open with yellow flame present. All
round burner flame holes should be open with a
small blue flame present. Some burner flame holes
may become blocked by debris or rust, with no
flame present. If so, turn off heater and let cool.
Remove blockage. Blocked burner flame holes
may create soot.
FRONT BURNER FLAME PATTERN
WARNING: If front burner
flame pattern shows yellow tip-
ping, your fireplace could pro-
duce increased levels of carbon
monoxide. Follow instructions
below. Yellow flame on rear
burner is normal.