Natural Gas Operation | Tempest®
All Data:............................... is based on firing with ambient combustion air.
UA-DA:................................ Published data is reasonably accurate between 17 and 86 mbar (6.9 and 34.6"w.c.) main air pressure (UA) if piped with >5 diameters of straight pipe into burner. Square rooting the UA-DA pressure drops using the published 69 mbar (27.7"w.c.) data is reasonably accurate between 17-86 mbar (6.9-34.6"w.c.) air pressure. Below 17 mbar (6.9"w.c.) the UA-DA data is suspect and should not be used for accurate air metering. Square rooting will over-estimate air flow below 17 mbar (6.9"w.c.) and underestimate above 86 mbar (34.6"w.c.) . UG-DG:................................ UG-DG information can be used to approximate fuel gas flow. External gas orifices or O 2 analysis should be used for precise determination of fuel metering and air/fuel ratio.
Max % XSAir, fs Max % XSAir, UV Max % XSAir, flame rod Max % XSFuel, fs
fs - indicates the maximum flame supervisory XSAir or XSFuel using either a UV detector or the specified flame rod listed on the 4441 parts list.
Max % XSAir, ignition Max % XSFuel, ignition
ignition - indicates the maximum XSAir or XSFuel at which the integral igniter will light the burner.
DG:...................................... Tile pressures are average values and are subject to considerable variation (±10%)
NATURAL GAS OPERATION Main Air Pressure, (UA pressure tap), mbar
4441-1
2
4
17
39
52
69
86
103
Capacity, Nm3/h main air (not burning)
43
Capacity, Nm3/h burner (burning stoich)
5
7
16
24
27
33
37
41
Air Orifice , (UA-DA) mbar Gas Orifice , (UG-DG) mbar
1.0
1.7
7.2
17.7
24.1
32.8
39.3
48.5
0.2
0.5
2.5
5.5
6.2
9.7
12.4
14.9
Tile Pressure, (DG) mbar
1.4
2.2
9.2
20.2
26.9
35.1
44.0
52.3
Max. % XSAir, fs, ignition
400
600
900
2000
2000
2000
2000
2000
Max. % XSFuel, fs
30 30 152
30 30
30 30
30 30
30 30
30 30
30 30
30 30
Max. % XSFuel, ignition
Flame Length, mm
178
178
203
229
254
254
254
Flame Diameter, mm
19
19
19
25
25
25
25
25
4441-2
.7
4
17
39
52
69
86
103
Capacity, Nm3/h main air (not burning)
72
Capacity, Nm3/h burner (burning stoich)
5
12
28
44
51
59
67
72
Air Orifice , (UA-DA) mbar Gas Orifice , (UG-DG) mbar
0.4
3.1
9.2
22.4
28.4
41.3
52.0
63.0
0.1
0.7
3.2
7.5
10.9
16.7
21.1
21.4
Tile Pressure, (DG) mbar
0.5
2.0
7.2
14.7
19.2
24.4
29.9
35.6
Max. % XSAir, fs, ignition
400
600
900
2000
2000
2000
2000
2000
Max. % XSFuel, fs
30 30 152
30 30
30 30
30 30
30 30
30 30
30 30
30 30
Max. % XSFuel, ignition
Flame Length, mm
203
254
254
254
254
279
254
Flame Diameter, mm
25
51
38
38
51
51
51
51
Bulletin 4441M page 4
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