Daikin Vision CAH 003-090 C Installation And Maintenance Manual page 40

MVP Variable Speed Sheaves
Mounting:
1 . Verify both driving and driven sheaves are in alignment
and the shafts are parallel . The centerline of the driving
sheave must be in line with the centerline of the driven
sheave (Figure 55) .
2 . Verify that all setscrews are torqued to the values shown
in Table 27 before starting drive. Check setscrew torque
and belt tension after 24 hours of service .
Adjusting:
1 . Adjust motor base forward to release belt tension.
Remove the belts for easier adjustment .
2 . Loosen, but do not remove both of the locking setscrews
A in the outer locking ring by using a hex key or torque
wrench with a hex bit.
3 . Adjust sheave to desired pitch diameter by turning
the outer locking ring, using a spanner wrench or drift
inserted into the three holes that are located 120° apart
on the ring .
Figure 54: LVP Type Sheave Adjustment
A
E
C
F
D
Section A-A
IM 672-11 • VISION AIR HANDLING UNIT
A
E
D
B
Section A-A
4 . Any pitch diameter can be obtained within the sheave
range . One complete turn of the outer locking ring
changes the pitch diameter 0 .233" .
5 . Do not open sheaves more than the following
a . Do not open B sheaves more than 4-3/4 turns for
the A belts or 6 turns for the B belts .
b . Do not open C sheaves more than 9-1/2 turns .
c . Do not open 5V sheaves more than 6 turns .
d . Do not open 8V sheaves more than 8 turns .
6 . Tighten BOTH locking screws A in the outer locking ring
before operating the drive. Use a torque wrench and
tighten to the value shown in
7 . Replace belts and adjust the motor base to tension the
belts properly . See Fan Drive Belt on page
8 . Do not loosen any screws other than the two locking
screws A in the outer locking ring when adjusting the
sheave pitch . Do not operate the drive until the locking
screws have been set to the torque specifications.
E
C
A
F
D
40
M
aInTenanCe
Table 27 .
42 .
A
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