Navien NFC-175 Service Manual page 17

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.
Internal Recirculation Pump
16
14
12
10
8
6
4
2
0
0
NFC-175/200
Version 1.0
Item
NFC-175/200
NFC Flow Performance Curve
2 4 6
Grundfos Circulator Sp3 (Default)
8 10
Flow Rate (GPM)
Grundfos Circulator Sp2
Pump Model
Grundfos UPS 15-78 CIL2
(Part Number: 30021636A)
12 14
Grundfos Circulator Sp1
30
25
20
15
10
5
0
16
NFC Service Manual 17