PB-1525 Wood Pellet Burner System: Installation and Operation Manual
Rev 1.0, OCTOBER 2011
Page 43 of 67
specified test appears and then pressing the “Run” button. The
system will simulate the pellet conveyor start and stop cycles that
would occur in six minutes of run time during the Firing State. You
can monitor the test status by watching the countdown on the
display.
8.)
Following the test run, you must weigh the amount of pellets in the
collection container using a scale accurate down to an ounce.
9.)
The amount of pellets measured during this test will determine the
firing rate of the burner. Be sure to measure appropriately and
double check the figures!
10.)
The measured amount of pellets in this test cycle will be used to set
the firing rate of the burner. Use the values below to calculate the
firing rate and determine next steps to be taken:
o
1 Pound of pellets = 8,200 btu of heating value
o
1 FT
3
of pellets = 40 Pounds
Therefore, if during the six (6) minute test the conveyor feeds a total
of 1.15 Pounds of pellets, use the following formula to calculate the
input firing rate of the burner:
1.15 LB Pellets in six (6) minutes (360 sec) = [1.15lb X
8,200btu/lb X 10] = 94,300 btu/hr
If the desired firing is higher than the calculated amount,
input a higher “Running Feed On” time and re-test. If it is
lower, input a lower “Running Feed On” time and re-test.
Use the following formula to calculate btu/hr:
[LB of Pellets in 6-Minute Test] X [8,200 btu/lb] X 10 = btu/hr input firing rate
If you know the btu/LB value of the specific pellets you are using, use that
number instead of the 8,200 btu/LB average given above.
WARNING!
If the burner is set to feed too many pellets on the power
feed cycle there is a risk of a gas explosion in the boiler
and/or over-firing the boiler. Pay particular attention to
the amount of pellets being fed to the burner system.
This test must be run for each installation of the burner.
