Bulletin 4445/4445N
Page 3
Natural Gas, USCS
Main Air Pressure, (UA pressure tap), "w.c.
Engineering Data | 4445N Tempest®
4445N-2 osi
0.2
1
4
9
16
20
24
"w.c. 0.3
1.7
6.9
15.6
27.7
34.6
41.5
Air Flow, not burning (scfh)
2320
Air Flow, (scfh)
235
500
1020
1530
2065
2350
2625
Air
Orifi ce UA-DA, (in. w.c.)
0.4
1.1
4.7
11.6
19.6
24.8
29.6
Gas Pressure @ 10% excess air "w.c.
0.3
1.4
4.9
9.8
18.1
22.0
27.5
Max % Excess Air, ignition
200
300
1000
1500
1400
1600
1800
Max % Excess Air, Flame Rod fl ame signal
200
300
1000
1400
1400
1600
1700
Max % Excess Air, UV fl ame signal S, M length
200
300
1000
1400
1400
1700
2000
Max % Excess Air, UV fl ame signal L, XL Length
150
300
1000
1400
1400
1600
1700
Max % XS Fuel, ignition/fl ame signal
30
30
30
30
30
30
30
Flame Length (in)
8
9
10
10
11
12
12
Flame Length (in)
2
2
2
2
2
2
2
4445N-3 osi
0.2
1
4
9
16
20
24
"w.c. 0.3
1.7
6.9
15.6
27.7
34.6
41.5
Air Flow, not burning (scfh)
3650
Air Flow, (scfh)
3450
825
1650
2500
3350
3850
4100
Air
Orifi ce UA-DA, (in. w.c.)
0.2
1.3
5.3
12.1
22.0
27.5
33
Gas Pressure @ 10% excess air "w.c.
0.2
1.1
4.1
9.5
14.8
18.4
22
Max % Excess Air, ignition
300
1000
1100
1300
1900
1700
1700
Max % Excess Air, Flame Rod fl ame signal
300
1000
1100
1300
1900
1800
1700
Max % Excess Air, UV fl ame signal S, M length
300
1000
1100
1300
1900
2000
2000
Max % Excess Air, UV fl ame signal L, XL Length
150
400
1100
1300
1900
2000
2000
Max % XS Fuel, ignition/fl ame signal
30
30
30
30
30
30
30
Flame Length (in)
12
14
16
16
16
16
20
Flame Length (in)
3.0
2.5
2.0
2.0
2.5
2.0
3.0
4445N-4-A osi
0.2
1
4
9
16
20
24
"w.c. 0.3
1.7
6.9
15.6
27.7
34.6
41.5
Air Flow, not burning (scfh)
6600
Air Flow, (scfh)
550
1300
2700
4300
5800
6600
7400
Air
Orifi ce UA-DA, (in. w.c.)
0.2
1.1
1.5
10.8
19.6
25.0
30.4
Gas Pressure @ 10% excess air "w.c.
0.2
1.4
4.3
8.1
18.1
21.0
24.6
Max % Excess Air, ignition
400
700
1100
1400
1200
1400
1200
Max % Excess Air, Flame Rod fl ame signal
350
700
1100
1600
1600
1700
1700
Max % Excess Air, UV fl ame signal S, M length
800
800
1100
1400
1000
1400
1200
Max % Excess Air, UV fl ame signal L, XL Length
800
800
1100
1400
1000
1400
1200
Max % XS Fuel, ignition/fl ame signal
30
30
30
30
30
30
30
Flame Length (in)
14
14
18
18
20
20
20
Flame Length (in)
3.0
4.0
4.0
4.0
4.0
4.0
5.0
