Navien NFC-175, Service Manual

Page: 19 / 138

NFC Service Manual 19 Version 1.0
3.2 Dimensions
The following diagrams show the dimensions of the boiler and the
table lists the supply connections.
33.5" (850mm)
Supply Connections
Description Diameter
A Air Intake 2 in
B Exhaust Gas Vent 2 in
C Air Vent Connection 3 /
4
in
D Heating Supply 1 in
E Heating Return 1 in
F Gas Connection
3
/
4
in
G Condensate Outlet
1
/
2
in
H Cold Water Inlet (DHW)
3
/
4
in
I Hot Water Outlet (DHW)
3
/
4
in
J Auto Feeder Inlet (Make-up Water) 1 /
2
in
Overhead View
A
B
C
3.8” (97 mm)
4.3” (109 mm) 4.1”
(105 m
m
)
9.7” (246 mm)
17.3” (440 mm)
Supply Connections
14.6” (370 mm)
2.6” (67 mm)
9.7” (247 mm)
5.2” (131 mm)
D J E
17.3”
(440
m
m
)
8.5” (215 mm) 10.6“ (269 mm)
3.3” (85 mm)
5.4” (136.6 mm)
2” (53 mm)
3.4” (87 mm)
I H F G