Navien NCB-180, Service Manual

Page: 21 / 149

18 NCB Service Manual Version 1.0
3.2 Dimensions
The following diagrams show the dimensions of the boiler and the table lists the supply connections.
Overhead View
Supply Connections
Supply Connections
Description Diameter
A
Air Intake 2 in
B
Exhaust Gas Vent 2 in
C
Space Heating Supply 1 in
D
Space Heating Return 1 in
E
Hot Water Outlet (DHW) 3/4 in
F
Gas Supply Inlet 3/4 in
G
Cold Water Inlet (DHW) 3/4 in
H
Condensate Outlet 1/2 in
I
Auto Feeder Inlet (Make-up Water) 1/2 in
12
“ (
306 m
m
)
3.
0”
(77
m
m
)
2”
(50 mm)
3.5”
(88 mm)
4.8”
(123 mm)
17.3"(440mm)
2.
4"
(61
m
m
)
3”
(76 mm)
1.8”
(46 mm)
3”
(77 m
m
)
0.
4“
(10
m
m
)
1.5“ (38 mm)
14.3” (364 mm)
2.
6”
(67
m
m
)
4.5” (115 mm) 6.7” (170 mm)
28.
8”
(73
1m
m
)
27.
4"
(69
5m
m
)