Daikin RoofPak RPS Series Installation And Maintenance Manual page 56

Adjusting Supply Fan Thrust Restraints
Thrust restraints are provided when housed double-width
fans are mounted on springs. After the spring mounts are
adjusted for level operation when the fan is running, check
the thrust restraints. With the fan off, set the adjustment nuts
so the spring is slightly compressed against the angle bolted
to the fan housing frame. Refer to
turned on, the fan moves back to a level position and the thrust
restraint spring compresses.
Thrust Restraint Adjustment (with Fan OFF)
1. Loosen jam nuts "A", Figure 79, Detail A.
2. Turn nut "C" until spring cup and washer contact thrust
restraint angle.
3. Turn nut "B" until spring is compressed by 2 turns of nut
"B".
4. Tighten jam nuts "A".
IM 926-3 • ROOFPAK APPLIED SYSTEMS
Figure 79. When the fan is
Preparing Unit for Operation
Figure 79: Thrust Restraint Adjustment
See Detail A
Jam nut A
Nut B
Spring clip
Washer
Detail A
Thrust restraint adjustment (with fan off)
1. Loosen jam nuts A.
2. Turn nut C until spring cup and washer contact thrust restraint angle.
3. Turn nut B until spring is compressed by two turns of nut B.
4. Tighten jam nuts A.
56
Fan bulkhead
Nut C
Jam nut A
Thrust restraint angle
Fan housing frame
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