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NORMAL AUTOMATIC OPERATION
When power is turned on the furnace is cold, the
draft will be closed. As the temperature in the fire box
rises to approximately 100-120°F, the automatic draft
opens allowing combustion air to enter the fire cham-
ber. As the temperature in the fire chamber rises, the
automatic draft will begin its throttling process until
it is completely closed, allowing maximum furnace
idling. (When it reaches your desired setting low to
high.)
As the outer heat jacket temperature rises past 105°F.
The secondary fan (low speed) starts automatically
and continues to operate until the fire burns down
and the heat exchanger cools to approximately 90°F.
This is adjustable.
LOW
105°
WHITE
ROGERS
3F05-1
220°
STAT
250°
Figure 27
The primary fan (high speed) will turn on automati-
cally provided the side jacket is at 105°F whenever
the remote room thermostat is calling for heat. The
fan will also turn on automatically if the plenum tem-
perature rises to the setting on the high limit switch
(set at approximately 220°F.) and will continue to op-
erate until the temperature of the plenum has cooled
down to approximately 100°F. The high limit is set at
approximately 250°F. and if this temperature is ever
obtained, the electronic control will be entirely de-en-
ergized and the automatic draft controller will close.
BOX 422 • TOWER, MN 55790 • USA • Tel (218) 753-2330 • www.lamppakuuma.com
R1
L
H
R1
115 VAC
24 V
R1
ELECTRONIC
CONTROL
Conditions will remain in this state until plenum tem-
perature has cooled with large fan running allowing
the automatic high temperature cut-out switch to re-
set the controller.
If this condition ever occurs, check to see if the
damper from the plenum is closed or for any obstruc-
tions in the cool air return or in the air supply ducts
and registers.
The display screen is furnished on the electric control
to provide the following:
A. 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.
B. The capital letter "C" will be on the display when
the fire chamber is cold (70-100°F) and this indi-
cates that the automatic draft damper is closed.
To heat the fire chamber, start the fire with the ash
pan door open, as soon as the capital letter "C"
goes off CLOSE the ASH PAN door. The display
FAN
screen will now show the number "3".
C. The electronic control has four different stages
and the numbers "1", "2", "3", and small letter "c"
indicate how much air is entering the fire chamber.
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 temperature.
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 control.
F. IF HI-TEMP ALARM GOES ON -
TURN CONTROL POWER SWITCH OFF
CHECK
Is door dealing?
Is draft = .03" - .06"?
Is draft shutter closing? Inspect draft shutter on motor box
Is wood too dry?
Are you reloading on
too many hot coals?
16
WHAT TO DO
Adjust hinges and latches to ensure they
are tight
Adjust Barometric draft to lower setting
Mix some wetter wood with dry wood
Burn down excess coals before
reloading
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