Engineering Data | 4445N Tempest®
Natural Gas Main Air Pressure, (UA pressure tap)
osi "w.c. mbar
4445N-2
0.2 0.3 0.9
1
4
9
16
20
24
1.7
6.9 17.2
15.6
27.7
34.6
41.5 103
4.3
39
69
86
Air Flow, not burning scfh (Nm 3 /h)
2320 (62.0)
Air Flow, scfh
235 (6.3)
500
1020 (27.3)
1530
2065 (55.2)
2350 (62.8)
2625 (70.2)
Air Flow (Nm 3 /h)
(13.4)
(40.9)
Air Orifice UA-DA, "w.c. (mbar)
0.4 (1.0) 0.3 (0.7)
1.1 (2.7) 1.4 (3.5)
4.7 (11.7) 4.9 (12.2)
11.6 (29)
19.6 (49) 18.1 (45)
24.8 (62)
29.6 (74) 27.5 (69)
Gas Pressure @ 10% excess air "w.c. (mbar)
9.8 (24.4)
22 (55)
Max % Excess Air, ignition
200 200 200 150
300 300 300 300
1000 1000 1000 1000
1500 1400 1400 1400
1400 1400 1400 1400
1600 1600 1700 1600
1800 1700 2000 1700
Max % Excess Air, Flame Rod flame signal Max % Excess Air, UV flame signal S, M length Max % Excess Air, UV flame signal L, XL Length
Max % XS Fuel, ignition/flame signal
30
30
30
30
30
30
30
Flame Length inches (mm) Flame Diameter inches (mm)
8 (203)
9 (229)
10 (254)
10 (254)
11 (279)
12 (305)
12 (305)
2 (51)
2 (51)
2 (51)
2 (51)
2 (51)
2 (51)
2 (51)
osi "w.c. mbar
4445N-3
0.2 0.3 0.9
1
4
9
16
20
24
1.7
6.9 17.2
15.6
27.7
34.6
41.5 103
4.3
39
69
86
Air Flow, not burning scfh (Nm 3 /h)
3650 (98)
Air Flow, scfh
350
825
1650 (44.1)
2500 (66.8)
3350
3850 (103)
4100 (110)
Air Flow (Nm 3 /h)
(9.36)
(22.1)
(90)
Air Orifice UA-DA, "w.c. (mbar)
0.2 (0.5) 0.2 (0.5)
1.3 (3.2) 1.1 (2.7)
5.3 (13.2) 4.1 (10.2)
12.1 (30) 9.5 (23.6)
22.0 (55) 14.8 (37)
27.5 (68) 18.4 (46)
33 (83) 22 (55)
Gas Pressure @ 10% excess air "w.c. (mbar)
Max % Excess Air, ignition
300 300 300
1000 1000 1000
1100 1100 1100 1100
1300 1300 1300 1300
1900 1900 1900 1900
1700 1800 2000 2000
1700 1700 2000 2000
Max % Excess Air, Flame Rod flame signal Max % Excess Air, UV flame signal S, M length Max % Excess Air, UV flame signal L, XL Length
150
400
Max % XS Fuel, ignition/flame signal
30
30
30
30
30
30
30
Flame Length inches (mm) Flame Diameter inches (mm)
12 (305) 3.0 (76)
14 (356) 2.5 (64)
16 (406)
16 (406)
16 (406) 2.5 (64)
16 (406)
20 (508)
2 (51)
2 (51)
2 (51)
3 (76)
Bulletin 4445/4445N Page 3
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