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9
About the Boiler
NFC-H Internal Pump
The NFC-H boiler is equipped with an internal circulation pump. The following table provides detailed
information on the pump used for the boiler and the performance curve.
Item
Pump Model
NFC-250/175H, NFC-250/200H
Internal Recirculation Pump
Grundfos UPS 15-78 CIAO2
(Part Number: 30023987A)
0
5
10
15
20
25
30
0
2
4
6
8
10
12
14
16
0
2
4
6
8
10
12
14
16
FT
o
f
H
ea
d
△
P
(
p
si
)
Flow Rate (GPM)
NFC-250/175H, NFC-250/200H
Grundfos Circulator Sp3 (Default)
Grundfos Circulator Sp2
Grundfos Circulator Sp1
NFC-H Flow Performance Curve
0
5
10
15
20
25
30
35
40
45
0
1
2
3
4
5
6
7
8
9
10
11
△
P
(
p
si
)
Flow Rate (GPM)
NFC DHW Pressure Drop Curve
NFC-H DHW Pressure Drop Curve
Summary of Contents for NFC-250/175H
Page 67: ...67 Venting for Combustion Air WARNING The vent installation detector Detectable Undetectable...
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