23
Installing the System Piping
PQ Curve
NFB-175H/200H
H[ft]
Q[GPM]
0
2
4
6
8
10
12
14
16
0 2 4 6 8 1 0 1 2
1 4
1 6 1 8 2 0 2 2
2 4 2 6
2 8
Q [GPM]
0
2.6
5.3
7.9
10.6
13.2
15.9
18.5
21.1
23.8
26.4
H [ft]
0
0.3
0.7
1.1
2
3
4.3
5.6
7.4
9.2
11.5
Maximum and Minimum Flow Rates through the Boiler
Model
Minimum Pipe Diameter
Maximum Flow (GPM)
Minimum Flow (GPM)
NFB-175H
1
1
/
4
"
23.1
7.0
NFB-200H
1
1
/
4
"
26.4
8.0
Temperature Rise Conditions
Model
20°F ΔT @ 100% water
25°F ΔT @ 100% water
35°F ΔT @ 100% water
Flow Rate
(GPM)
Head
(Ft)
Flow Rate
(GPM)
Head
(Ft)
Flow Rate
(GPM)
Head
(Ft)
NFB-175H
16
4.2
13
2.9
9
1.4
NFB-200H
18
5.3
15
3.9
11
2.1
Summary of Contents for NFB-175H
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