McQuay SWP Series Installation And Maintenance Manual page 47

BOA concentric inserts
Be sure that BOA Concentric collar is fitted square and
1
snug against the shoulder on the inner ring.
Torque BOA Concentric collar cap screw to torque
2
recommended in Table 21.
Table 21: Recommended Torque Values for Concentric
Locking Bearing/Shaft Size
Fan Size (in) Bore Size (in)
27 (AF)/40 & 49 2-3/16
(SWSI)
30 & 33 (AF)/44 2-7/16
(SWSI)
36 (AF) 2-11/16
40 (AF) 2-15/16
AF = DWDI AF, SWSI = AF Plenum Fan
Note:
McQuay IM 937
Torx Screw
In lbs.
Size
T-30 180
T-45 400
T-45 400
T-45 400
System Maintenance
Monitor installed bearing
After bearing has been run for several minutes, and again after
several hours, check bearing for excessive noise or vibration.
Shutdown machine and check housing temperature: typical
applications operate at 100°F - 105°F (38°C - 66°C). Tighten
all locking devices after 500 hours or 3 months, whichever
comes first.
47