McQuay IM 777-7
21
Operation Guidelines
Figure 31: Wheel-to-Inlet Funnel Relationship—13 to 36
Belt-Drive Plenum Fans
Figure 32: Wheel-to-Inlet Funnel Relationship—40 to 60
Belt-Drive Plenum Fans
Table 9: Wheel-to-Inlet Funnel Relationship—40 to 60 Belt-
Drive Plenum Fan
Figure 33: Fan Wheel Rotation
Table 8: Wheel-to-Inlet Funnel Relationship—13 to 36 Belt-
Drive Plenum Fan
Wheel-Funnel Parameters
Size
A
B
C
13
0.25
0.91
3.50
15
0.25
0.91
3.50
16
0.25
0.91
3.50
18
0.38
0.86
3.88
20
0.42
1.11
3.88
22
0.45
1.11
3.88
24
0.51
1.11
3.88
27
0.55
1.36
4.50
30
0.62
1.36
4.50
33
0.55
1.50
5.00
36
0.63
1.50
5.00
Cross Section Reference
C
AROUND DIAMETER
EQUALLY SPACED
B
A
FROM FUNNEL END TO
FANWHEEL OPENING END
Wheel-Funnel Parameters
Size
A
B
C
40
0.82
2.00
4.88
44
0.91
2.25
5.50
49
1.00
2.50
5.50
54
1.10
2.50
5.50
60
1.23
3.00
5.50
Cross Section Reference
B
C
A
FUNNEL END TO FAN
WHEEL OPENING
EQUALLY
SPACED AROUND
DIAMETER