Gas - Biasi SG 2 Manual And Installation Instructions

Page 20
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.
Riello
Boiler Model Burner Model
SG-2 R120
R200
SG-3
R200
SG-4
R400
SG-5
R400
SG-6
SG-7 R400
Heat
Wise
Boiler Burner Input
Model Model (MBH)
SG-2 SU-2A
SU-2A
SG-3
SG-4 SU-2A
SU-2A
SG-5
SU-3
SG-6
SU-3
SG-7
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.
3
Ft /hr = [3600/(sec. Per rev.)/*(Size of gas meter)
8.2 Gas Burner Setup
Input Man. Pres.
(MBH) (W.C.)
91 1.35"
140 1.14"
182 1.67"
224 1.12"
266 1.25"
315 1.5"
Natural Gas
Man. Pres. Head
(W.C.) Setting
91 3.5"
140 3.5"
182 3.5"
224 3.5"
266 1.7"
315 2.5"
Natural Gas
Head Air Orifice
Setting Gate (mm)
2.0 2.75
3.0 2.4
5.0 3.0
1.0 2.4
2.0 2.8
3.0 3.2
Air Orifice Man. Pres.
Gate
20 closed 7/32"
15 8.3 9/32"
9 14 21/64":
3 15 27/64"
1 6 No
3 8.5 No
Seconds per
Revolution
20
25
30
35
40
45
50
55
60
Biasi SG Series
Propane
Man. Pres. Head
(W.C.) Setting
1.7 1.35" 2.0
2.0 1.85" 3.0
2.0 2.65" 5.0
2.2 1.37" 1.0
2.2 1.5" 2.0
2.2 1.9" 2.0
Propane
Head
(W.C.) Setting
N/A N/A
2.3" 15
2.3" 9
2.3" 3
1.4" 4
2.0" 3
Size of Gas Meter Dial
(Cubic Foot)
0.5 1
90 180
72 144
60 120
51 103
45 90
40 80
36 72
33 65
30 60
Air Orifice
Gate (mm)
2.75 1.3
2.4 1.3
3.0 1.3
2.5 1.5
2.6 1.5
2.9 1.5
Air Orifice
Gate
N/A N/A
8.5 9/32"
14 21/64"
15 27/64"
4.75 No
9 No
2
360
288
240
206
180
160
144
131
120