A.O. Smith NW 37-670 User Manual
Page 3
3
SIZES AND DATA 780KW THRU 3300KW
Model Number
Inlet* & Boiler
Prefix
Gal.Cap. Std.KWInput
D
E
F
G**
H
J
K
S
T
Outlet*
Drain
NW
220
780K
60
50
25
71
21
2
25 1/2
30
5 1/2
5
1 1/2
NW
220
840K
60
50
25
71
21
2
25 1/2
30
5 1/2
5
1 1/2
NW
220
900K
60
50
25
71
21
2
25 1/2
30
5 1/2
5
1 1/2
NW
220
960K
60
50
25
71
21
2
25 1/2
30
5 1/2
5
1 1/2
NW
220
1020K
60
50
25
71
21
2
25 1/2
30
5 1/2
5
1 1/2
NW
220
1080K
60
50
25
71
21
2
25 1/2
30
5 1/2
5
1 1/2
NW
220
1140K
60
50
25
71
21
2
25 1/2
30
5 1/2
5
1 1/2
NW
334
1200K
60
50
25
99
25
2
25 1/2
30
7 1/4
6
2
NW
334
1260K
60
50
25
99
25
2
25 1/2
30
7 1/4
6
2
NW
334
1380K
60
50
25
99
25
2
25 1/2
30
7 1/4
6
2
NW
334
1500K
60
50
25
99
25
2
25 1/2
30
7 1/4
6
2
NW
334
1620K
60
50
25
99
25
2
25 1/2
30
7 1/4
6
2
NW
334
1740K
60
50
25
99
25
2
25 1/2
30
7 1/4
6
2
NW
400
1800K
66
56
28
90 1/2
25 1/2
2 1/2
30
33
7 3/4
8
2
NW
400
1860K
66
56
28
90 1/2
25 1/2
2 1/2
30
33
7 3/4
8
2
NW
400
1980K
66
56
28
90 1/2
25 1/2
2 1/2
30
33
7 3/4
8
2
NW
400
2100K
66
56
28
90 1/2
25 1/2
2 1/2
30
33
7 3/4
8
2
NW
500
2200K
72
62
31
90 1/2
26 1/2
2 1/2
34
36
7 3/4
8
2
NW
500
2340K
72
62
31
90 1/2
26 1/2
2 1/2
34
36
7 3/4
8
2
NW
500
2460K
72
62
31
90 1/2
26 1/2
2 1/2
34
36
7 3/4
8
2
NW
500
2580K
72
62
31
90 1/2
26 1/2
2 1/2
34
36
7 3/4
8
2
NW
670
2700K
78
68
34
96 1/2
30 1/2
2 1/2
38
39
7 3/4
8
2
NW
670
2820K
78
68
34
96 1/2
30 1/2
2 1/2
38
39
7 3/4
8
2
NW
670
2940K
78
68
34
96 1/2
30 1/2
2 1/2
38
39
7 3/4
8
2
NW
670
3060K
78
68
34
96 1/2
30 1/2
2 1/2
38
39
7 3/4
8
2
NW
670
3180K
78
68
34
96 1/2
30 1/2
2 1/2
38
39
7 3/4
8
2
NW
670
3300K
78
68
34
96 1/2
30 1/2
2 1/2
38
39
7 3/4
8
2
NOTE: For boilers 3400KW to 6000KW, consult factory.
* All fittings under 4” will be threaded type. All fittings 4” and larger will be flanged.
** Where overall height is a problem a larger diameter vessel with a reduced height may be furnished.