Navien NFC-175 Installation & Operation Manual page 9

NFC Internal Pump
The NFC 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.
NFC-175/200
Internal Recirculation Pump
16
14
12
10
8
6
4
2
0
0 2
NFC-175/200
45
40
35
30
25
20
15
10
5
0
0 1
Item
NFC Flow Performance Curve
NFC Flow Performance Curve
4 6
Flow Rate (GPM)
Grundfos Circulator Sp3 (Default)
NFC DHW Pressure Drop Curve
NFC DHW Pressure Drop Curve
2 3 4 5
Flow Rate (GPM)
Grundfos UPS 15-78 CIL2
(Part Number: 30021636A)
8 10 12
Grundfos Circulator Sp2
6 7 8
Pump Model
30
25
20
15
10
5
0
14 16
Grundfos Circulator Sp1
9 10 11
About the Boiler 9