Page 20
Biasi SG Pro Series
Good, reliable operation with a minimum of service, starts with attention to the small details:
1. Setting electrodes "by the book" using the manufacturer's gauges.
2. Checking gas pressure to the burner and out of the gas valve.
3. Checking draft at the breeching to insure it is adequate to overcome flue
gas resistance.
4. Setting the air band properly with well maintained instruments. A good
target is 8.5% to 9.5% of (CO
2
) for Natural Gas or 10% to 11% of (CO
2
) for
Propane.
7. Verify a CO level is less than 200 ppm
This page is only for boilers using a gas burner. If an oil burner is being used, please refer to
page 12 for the proper setup of the burner.
To determine how much gas is coming into the burner,
or to set the gas meter correctly, the following 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)
Seconds per
Revolution
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
8.2 Gas Burner Setup
Riello
Natural Gas
Propane
Boiler
Model
Burner Model
Input
(MBH)
Man. Pres.
(W.C.)
Head
Setting
Air
Gate
Orifice
Man. Pres.
(W.C.)
Head
Setting
Air
Gate
Orifice
SG-3
R200
140
3.5”
2.0
2.25
B5
3.5”
2.0
2.25
B15
SG-4
R200
182
3.5”
3.0
2.75
B6
3.5”
3.0
2.5
B16
SG-5
R400
224
3.5”
1.0
2.0
C3
3.5”
1.0
1.5
C13
Summary of Contents for SG-3
Page 2: ...Page 2 Biasi SG Pro Series...
Page 33: ...Biasi SG Pro Series Page 33 Notes...
Page 34: ...Page 34 Biasi SG Pro Series Notes...
