TECHNICAL PASSPORT. INSTALLATION and OPERATION MANUAL
TECHNICAL PASSPORT. INSTALLATION and OPERATION MANUAL
28
10.1. Calibration of auger fuel feed rate.
The auger fuel feed rate changes
depending on the density and size of the
fuel used. Therefore it is necessary to
calibrate the main auger every time you
change the type of the fuel used.
CAUTION! It is recommended to
use the same fuel throughout
the heating season.
Once you have installed the pellet auger
according to the instructions in the
manual, fill the hopper with fuel (pellets).
Connect the power supply of the pellet
auger directly to the power mains. The
auger is now in operation. Wait about
15-20 minutes for the pellet auger to
fill with pellets. The auger is filled with
pellets when pellets begin to fall from the
T-branch of the auger at the point where
the flexible pipe is attached.
Filling of the pellet auger is necessary
when the fuel in the hopper has been
depleted or when fuel has been changed.
Once you have ensured that the pellet
auger has been filled, take an empty
plastic bag and fixed it securely on the
pellet auger, at the place of the flexible
pipe. Reconnect the auger to the power
socket and measure the amount of
pellets collected in the bag over a period
of 15 minutes using scales/weighing
scale. (In our example, the amount
of pellets collected in the bag over a
15-minute period is
4320
grams
(900
sec)
. We then divide
4320
by
900
and get
4,8
grams of pellets per 1 second. Repeat
the measurement in order to obtain
conclusive results .
10.2. Burner output adjustment.
In the burner output settings menu you
can adjust the running time of the main
auger (
Feed
); main running interval
(
Cycle
) and fan output (
Fan
).
Example for Pell 25 model
: we select
mode
Cycle
=
20 sec.
The heating value of
your fuel is
4,8kWh/kg
. (manufacturers
indicate the heating value of the fuel
on the packing – take it from there).
We then employ the following formula
to calculate the number of seconds for
setting the operation of the main auger
for these
20
sec.
:
t
FEED
= 25 000 / (4,8 x 180 x 4,8)
hence
t
FEED
= 6 sec.,
where
25,000
is the desired output of the
burner in Watts
(W)
,
4,8
is the heating value of the fuel in
kWh/kg,
180
is the number of burning cycles per
1 hour,
4,8
is the amount of pellets in grams fed
by the auger per 1 second. This way the
output mode can be changed and instead
the number
25,000 – 25kW
, we input the
desired kilowatts
(40 kW=40000 W, 70
kW=70000 W etc.).
Take also note of the fuel heating value
which would change the value for the
feed and the burner output.
Using the above procedure, you can set
any of the three output modes of the
burner.
Mode
: Maximum output
mode
– It is indicated by three flames.
Pellet auger running time (Feed)
–
6 sec.
(25kW)
Main combustion cycle (Cycle)
–
20 sec.
(recommended)
