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PAGE 11
BIASI B/40
BURNER MANUFACTURER Heat Wise
Boiler Model B-406 B-407 B-408 B-409 B-410 B-411 B-412
Burner Model
SU-3 SU-3 SU-4 SU-5 SU-5 SU-6 SU-6
Fuel
Natural Natural Natural Natural Natural Natural Natural
Input
315 420 499 577 672 847 954
Min. Gas Inlet Size
1" 1" 1" 1" 1" 1" 1-1/4"
Manifold in w.c.
1.95" 3" 3.5" 2" 2.8" 1.16" 1.4"
Air
9.5 14 21 7.5 9 4.25 5
Head
6 11 20 2" 2" 2-5/8" 2-5/8"
BURNER MANUFACTURER Heat Wise
Boiler Model B-406 B-407 B-408 B-409 B-410 B-411 B-412
Burner Model
SU-3 SU-3 SU-4 SU-5 SU-5 SU-6 SU-6
Fuel
Propane Propane Propane Propane Propane Propane Propane
Input
315 420 527 634 740 847 954
Min. Gas Inlet Size
3/4" 3/4" 1" 1" 1" 1" 1"
Manifold in w.c.
1.65" 2.4" 2.75" 1" 1.27"
Air
7.25 15 21.5 5.2 5.8
Head
6 10 18 2" 2" 2-5/8" 2-5/8"
The following information applies only to the BIASI B-40 series boilers at a maximum output
for power venters or lined chimneys only.
8. Burner Setup:
Good, reliable operation with a minimum of service starts with attention to the small details:
1. Setting the electrode and flame rod settings against manufacturer's specs to insure proper operation.
2. Installing properly sized gas piping according to BTU input required and length of gas line run.
3. Making sure there is proper manifold pressure before and after the gas valve using a calibrated manometer.
4. Checking draft at the breeching to insure it is adequate to overcome flue gas resistance.
5. Setting the air band properly with well maintained instruments. A good target is 9.5% to 10.5% of (CO
2
) or 5%
to 2.5% of (O
2
) for natural gas, or 10% to 12% of (CO
2
) or 5% to 2.5% of (O
2
) for lp gas
Note: Oil and Gas burners on B40-series boilers cannot be properly commissioned
without instruments and gauges.
To determine how much gas is coming into the
burner, or to set the gas meter correctly, the follow-
ing formula can be used.
The chart to the right can be used to determine the
flow rate depending upon the time per revolution and
the size of the gas meter dial.
Ft
3
/hr = [3600/(sec. Per rev.)]*(Size of gas meter)
Size of Gas Meter Dial
(Cubic Foot)
0.5 1 2
20 90 180 360
25 72 144 288
30 60 120 240
35 51 103 206
40 45 90 180
45 40 80 160
50 36 72 144
55 33 65 131
60 30 60 120
Seconds per
Revolution