Page 14
IM777
Fan Wheel Alignment
Table 2: Wheel-to-inlet funnel relationship —
airfoil type fan wheels (housed)
Notes:
1. Dimensional relationship must be held to obtain rated air performance.
2. Dimension A is achieved by loosening setscrews in wheel hub(s), shifting
wheel(s) axially as needed, and retightening setscrews.
3. Dimension B is obtained by loosening screw and washer fasteners around
periphery of funnel(s), shifting funnel radially as required, and re-torquing
fasteners.
Table 3: Wheel-to-inlet funnel relationship —
forward curved type fan wheels (housed)
Notes:
1. Dimensional relationship must be held to obtain rated air performance.
2. Adjust dimension C by loosening wheel hub setscrews, shifting wheel(s) axi-
ally as needed, and retightening setscrews.
AIRFOIL
Unit Sizes 003-055
Diameter
A (inches)
A (mm)
B (inches)
B (mm)
13.22
4.56
116
0.21
5.33
14.56
5.06
129
0.21
5.33
16.18
5.62
143
0.21
5.33
17.69
6.90
175
0.22
5.59
21.56
7.59
193
0.24
6.10
24.00
8.45
215
0.23
5.84
A
A
B
Equal spacing
all around
FORWARD CURVED
Unit Sizes 003-055
Diameter (Inches)
C (inches)
C (mm)
9 x 4
0.25
6.35
9 x 7
0.13
3.30
9 x 9
0.25
6.35
10
0.22
5.59
12
0.35
8.89
15
0.44
11.18
18
0.25
6.35
20 (class 1 & 2)
0.73
18.54
22-1/2 (class 1 & 2)
0.59
14.99
24-1/2 (class 1 & 2)
0.56
14.22
Inlet
Funnel
Wheel
C
C
Inlet
Funnel
Summary of Contents for Skyline IM777
Page 27: ...IM777 Page 27 Notes...