Dimensional data, Nyd - 120 - a, Model number code – Greenheck Fan Centrifugal Roof Exhaust Fans NYB User Manual
Page 4: Motor hp, Model, Fan size, Motor rpm
4
Dimensional Data &
Model Number Code
Model Number Code
The model number code is designed to completely identify the fan. The correct code letters must be
specified to designate the correct construction. The remainder of the model number is determined by
the size and performance.
NYD - 120 - A
Motor HP
for Belt Drive
4
= 1/4
7
= 3/4
3
= 1/3
10
= 1
5
= 1/2
15
= 11/2
Model
NYD
- Direct Drive
NYB
- Belt Drive
Fan Size
75
through
240
4
Motor RPM
for Direct Drive
A
= 1725
B
= 1140
Dimensional Data
Model
A
B
C
Damper Square
NYD-75
19
(483)
30
3
⁄
4
(781)
20
1
⁄
2
(521)
10
(254)
NYD-90
19
(483)
30
3
⁄
4
(781)
20
1
⁄
2
(521)
10
(254)
NYD/NYB-100 22
(559)
35
1
⁄
2
(902)
25
(635)
12
(305)
NYD-120
24
(610)
37
(940)
23
1
⁄
8
(587)
14
(356)
NYD-130
24
(610)
37
(940)
23
1
⁄
8
(587)
14
(356)
NYD/NYB-140 26
(660)
41
1
⁄
2
(1054)
26
7
⁄
8
(683)
16
(406)
NYB-180
30
(762)
45
(1143)
32
5
⁄
8
(829)
18
(457)
NYB-240
34
(864)
52
1
⁄
2
(1334)
38
5
⁄
8
(981)
24
(610)
All dimensions in inches (millimeters).
B
C
A
2 1/2 in.
(64 mm)