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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE
Control Board Operation
Stove ON/OFF Button – This button will turn your
stove on or off while in Manual or Automatic
mode (see Page 20 for details). The green
ON/OFF light at the top of control board will
indicate the ON/OFF status.
Heat Select Button – The heat select button
has three selection settings, Low, Medium and
High. Pressing the button will scroll the red
indicator lights from Low to High. The button
controls the pellet feed and combustion airfl ow
simultaneously. The control board is preset
to provide the optimum ratio of fuel and air at
each setting. Settings can be changed at any
time but will only take affect after the start-up
cycle is complete. Each press of the Heat Select
Button will increase the heat output, and will
scroll to the lowest setting after reaching the
maximum setting.
Blower Select Button – The blower select
button operates the room air blower. This will
change the fl ow of hot air into the room. Three
choices are available Low, Medium, and High.
When the blower select button is pressed the
yellow indicator light will scroll to Low, Medium,
or High.
When running your stove on high (controlled
with the heat select button), the control board
will not allow you to select the low blower speed.
This is a safety precaution to protect against
overheating. Blower settings can be changed
at any time, but will only take affect after the
start-up cycle is complete.
Fault Mode – The control system automatically
monitors the fl ame using a photoeye. If the
appliance runs out of pellets the control board
automatically goes into a “fault” status. The
control board will initiate the shut down cycle
and safely shut down the appliance leaving it
in the “fault” mode. The ON/OFF indicator light
near the top of the control board will fl ash
rapidly when in this mode. After refi lling the
hopper with pellets, press the ON/OFF button.
If a thermostat is not being used the stove will
go into the start-up cycle. If a thermostat is
being used the stove will go into the start-up
cycle if the thermostat is in the demand mode.
If the thermostat is in the stand-by mode when
the fault is cleared, the stove will remain in the
stand-by mode until it closes again.
Note: If the fuel feed trim or combustion air
trim needs to be adjusted, contact an authorized
Lennox Hearth Products Technician to calibrate
internal software. It is recommended that the
damper be used to fi ne-tune your stove to your
particular fuel and installation confi guration (see
Damper Adjustment on Page 9 and Damper
Adjustment Guideline on Page 21).
Power LED
(fault when
fl ashing)
Heat LED
Blower
LED
Stove
ON/OFF
Button
(& start
button)
Heat
Select
Button
(Heat
output
control)
Blower
Select
Button
Proudly made in the USA
Calib.
Heat
Photoeye
P/N
Label
Location
Power
Select
Main
Harness
Fuse
Figure 33 - Control Board
Note: The control board has an internal memory
which recalls the last setting prior to loss of
power. Because we individually check each
stove prior to packaging, one of the two sce-
narios will appear when you fi rst plug in your
pellet appliance.
1). The Green LED at the top of the control
board will illuminate and the blowers will be
running. This is a standard cool down mode
and will last no longer than fi ve minutes. This
happens during testing when the stove is
turned off (which initiates cool down mode)
and then is unplugged.
2). The Green LED at the top will illuminate and
the red and yellow LED’s will illuminate on the
control board, indicating that the appliance is
in the run mode. This happens during testing
if the stove is unplugged without fi rst turn-
ing the control board off (the control board
remembers its last setting, which was the
run mode).
If your appliance follows what is described in
number 2, simply press the ON/OFF button once
to turn the appliance off, this will initiate the cool
down mode. The appliance can be restarted at
any time during the cool down mode by pressing
the ON/OFF button once.
Flame Detection Sequence of Events - This is
what happens after fl ame has been detected.
• Happens within the Start-up Time Delay
sequence.
• 0 to 1 minute no fuel feed.
• Flame settles.
• Bed of embers built.
• 1 minute mark: Fuel Feed rate 20% for 4
minutes 15 seconds (1 second on / 4 seconds
off).
• 2 minute mark: igniter turns OFF / room air
blower = panel setting.
• 5 minute 15 seconds mark: exhaust blower
= panel setting / LED indicator still active.
Start-up Time delay ends 14 minutes 15 sec-
onds after pushing the start button!
Figure 34 - Control Board (backside)
CARE AND OPERATION