HOW THE VAPOR FIRE ELECTRONIC
DRAFT CONTROL WORKS
READ OVER THE FOLLOWING
EXPLANATIONS VERY CAREFULLY
1. When you first turn on the power – the 24 volt elec-
tronic control is energized, the controls high tem-
perature siren sounds for only a short time, then
after this, the control will automatically go to the low
temperature setting which is when the capital letter
“C” is on the display screen.
2. When first starting a fire, you may open the ash
pan door for a very short while until the control
senses the heat which is being generated by the
fire. Once the control senses the heat it will auto-
matically open the draft shutter. (THE NUMBER “3”
WILL APPEAR ON THE DISPLAY SCREEN). Allow
the ash pan door to remain open for a short period
of time to assure that the wood has properly ignit-
ed. NOW CLOSE THE ASH PAN DOOR AND THE
ELECTRONIC CONTROL WILL TAKE OVER AND
IT WILL CONTROL THE DRAFT AS NEEDED TO
BURN THE WOOD, MAKE SURE THE ASH PAN
DOOR REMAINS CLOSED AND THAT THE LATCH
IS HOOKED THROUGHOUT THE ENTIRE BURN.
*** NEVER EVER BURN THE STOVE WITH THE
ASH PAN DOOR OPEN OTHER THEN DURING
THE FIRST FEW MINUTES WHEN STARTING
THE FIRE.
3. The electronic control has four different stages and
the numbers “1”, “2”, “3” and small letter “c” indi-
cate how much air is entering the fire chamber, for
example as follows:
A. At start up, THE NUMBER “3” is on and also
again at the end of the burn cycle, this indicates
that the shutter is wide open.
B. As the fire gradually intensifies, the number
“2” appears on the screen which means that the
control has automatically decreased the amount of
air going into the fire chamber, now the shutter is
partially closed.
C. As the temperature in the fire chamber con-
tinues to rise, the control automatically closes so
that the number “1” appears on the screen which
means that the shutter is almost closed.
D. The small letter “c” will appear on the screen
when the temperature in the fire chamber has
reached it’s optimum level. (Your low to high set-
ting.) Now the shutter is completely closed, the
stove is now on what we call the pilot burn and will
continue like this until the fire chamber cools down
and then the control again takes over and will adjust
the shutter opening based on the fire chamber tem-
perature.
E. When the temperature in the fire chamber is too
high the letters “A” and “L” blink on and off and the
alarm beeper sounds continuously. If this condition
occurs, check the “TO DO” list located on the con-
trol.
F. The letters “O” and “P” will blink on and off and
the beeper beeps intermittently when there is an
open circuit in the thermocouple. The automatic
draft will remain closed. Replace thermocouple.
4. The LOW TO HIGH TEMPERATURE KNOB is used
to adjust the total heat output of the vapor fire fur-
nace, depending on what the temperature is out-
side will determine where you set it.
5. You learn to judge the settings L/H for the weather
conditions. L - Mild M - Moderate H - Cold
6. To obtain a lower average BTU output, for any of
the computer settings with a longer burn time,
here’s what to do: A) Turn the computer to desired
setting. B) Adjust the blower speed wall thermostat
very low to keep the blower on low speed only. C)
Turn the blower low limit button thermostat located
on the side of the hood next to the computer from
105°F to 120-145°F. so the blower cycles on and
off. D) Estimate the length of burn you’ll have, in
relation to how much wood you’re loading in the fire
box, so that when the #3 reappears on the digital
screen near the end of the burn you can then turn
off the computer via the toggle switch. This keeps
the burn on pilot air only until it ends. Be sure to
restart the computer for the next burn. Helpful hint:
The #3 reappears when there is approximately two
hours left in the burn. If you estimate and eight hour
burn, at approximately six hours the #3 would ap-
pear, and that’s when you would turn the computer
off to extend the burn.
7. Maximum load size for any of the computer settings
would be numerous rows of cordwood (approxi-
mately 20” long) stacked as high as smoke flap fol-
lowed by another row (approximately 16”-18” long)
above the smoke flap. Make sure the smoke flap
returns to its normal vertical position once the fire
chamber is loaded.
BOX 422 • TOWER, MN 55790 • USA • Tel (218) 753-2330 • www.lamppakuuma.com
23
