McQuay Skyline IM 777-1, Installation And Maintenance Manual

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18 McQuay IM 777-1
Operation Guidelines
Figure 29: Torque for FC variable inlet vanes (in–lb) Figure 30: Torque for AF variable inlet vanes (in–lb)
Figure 31: Torque requirements at 100% WOV for SWSI
plenum fans with NESTED inlet vane
300
250
200
150
100
90
80
70
60
50
350 400 450 500
550
600 650 700 750 800 850 900
1000 1500 2000
Fan speed (rpm)
FC22.25
FC20.00
FC18.00
FC15.00
FC12.62
FC24.50
Torque (in–lb)
300
250
200
150
100
600 650 700 750 800 850
1000
Fan speed (rpm)
900
400
350
550
900
AF40.25
AF27.00
AF24.50
AF22.25
AF20.00
AF38.50
AF33.00
AF30.00
500
600
700
800
2000
1000
1500
1500 2000 3000 2500
Torque (in–lb)
Table 9: Operating limits—plenum fans
Fan operating limits
Plenum fans
Diameter 13.5 15 16.5 18.25 20 22.25 24.5 27 30 33 36.5 40.25 44.50 49 54.25 60
Maximum rpm Class I 2895 2589 2376 2256 2077 1875 1691 1479 1328 1209 1073 972 882 799 725 651
Maximum rpm Class II 3786 3384 3100 2959 2703 2413 2199 1928 1730 1579 1401 1264 1150 1043 938 847
Maximum rpm Class III 4000 4000 3887 3735 3409 3065 2780 2423 2182 1984 1756 1598 1447 1314 1178 1071
60
0
700
600
500
400
100
900
300
200
T
o
rq
ue
(lb.
/in
.)
Fan Speed (rpm)
800 900
10
00
15
00
2000
400 500
600 700
300 200
3000
800
1000
2000
3000
4000
5000
54
2
49
0
44
5
40
2
36
5
33
0
30
0
27
0
245
To
rqu
e
(in-lb
)