McQuay Skyline OAC 003G Manual de instalación descargar pdf (Pagina 23)

McQuay IM 777-7 23

Operation Guidelines

Operating Limits

Do not exceed the operating limits in Table 15 through

Table 19. A fan wheel operated beyond the rpm and

temperature limits shown can suffer permanent distortion or

fracture. The resulting unbalance can cause severe unit

vibration

Table 15: Unit Sizes 003 to 035

Fan operating limits

Forward curved—housed

Diameter 9 × 4 9 × 7 9 × 9 10.62 12.62 15 18 20 22.25 24.50

Maximum rpm Class I N/A 2189 2223 1934 1614 1328 1155 1050 944 858

Maximum rpm Class Il 2700 2854 2896 2518 2091 1725 1450 1200 1030 910

Airfoil—housed

Diameter 13.22 14.56 16.19 19.69 21.56 24.00

Maximum rpm Class I 3000 3000 2300 2000 1700 1500

Maximum rpm Class Il 4335 3918 3457 2858 2427 2255

Table 16: Unit Sizes 040 to 090

Fan operating limits

Forward curved—housed

Diameter 20 22.38 25 27.62 30.25 33 36

Maximum rpm Class I 1010 930 790 690 650 600 560

Maximum rpm Class Il 1281 1178 1011 910 835 763 715

Airfoil—housed

Diameter 20 22.25 24.5 27 30 33 36.5

Maximum rpm Class I 2077 1875 1691 1479 1328 1209 1073

Maximum rpm Class Il 2703 2413 2199 1928 1730 1579 1401

Table 17: Operating Limits—Belt-Drive Plenum Fans

Fan Operating Limits

Belt-Drive Plenum Fans

Size 13 15 16 18 20 22 24 27 30 33 36 40 44 49 54 60

Maximum rpm Class II 3909 3468 2820 2930 2674 2403 2183 1860 1783 1620 1465 1329 1202 1091 986 891

Maximum rpm Class III 4000 4000 3887 3735 3409 3065 2780 2423 2182 1984 1759 1598 1447 1314 1178 1071

Table 18: Operating Limits—Inline Fans, Twin Fans

Fan Operating Limits

Inline fans

Diameter 18.25 20 22.25 24.5 27 30 33 36.5 40.25 44.50 49 54.25

Maximum rpm Class I 2727 2488 2236 2041 1835 1665 1476 1330 1208 1072 973 880

Maximum rpm Class II 3409 3111 2796 2551 2294 2082 1846 1662 1510 1340 1216 1100

Twin fans

Diameter 9 x 9 10.62 12.62 15 18.12 20

Maximum rpm 2575 2400 2000 1700 1400 1200

Maximum HP 10 15 15 30 40 40

Table 19: Operating Limits—Direct-Drive Plenum Fans

Fan Operating Limits

Belt-Drive Plenum Fans

Size 11 12 13 15 16 18 20 22 24 27 30 33 36 40 44 49 54 60

Maximum rpm Class II 4000 4000 — 3909 3650 3650 2674 2403 2183 1981 1783 1620 1465 1329 1202 — — —

Maximum rpm Class IlI — — 4000 4000 3887 3735 3409 3065 2780 2423 2182 1984 1759 1598 1447 1314 1178 1071

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 39 40

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McQuay Skyline OAC 003G Manual de instalación Pagina 23

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