Lvp Variable Speed Sheaves - Daikin Destiny VFD Series Installation And Maintenance Manual

LVP Variable Speed Sheaves

Mounting:
1. Slide sheave on motor shaft so that the side of the sheave
with setscrew A is next to the motor, when setscrew A is in
the hub or barrel of the sheave. See
2. When setscrew A is at an angle in the center flange B,
mount it away from the motor so the outer locking ring
and flange can be removed to get to the setscrew.
3. 3 To remove the flange and locking ring:
a. Loosen setscrews D.
b. Loosen but do not remove capscrews E.
c. Remove key F. (This key projects a small amount
to provide a grip for removing.)
d. Rotate the flange counterclockwise until it
disengages the threads on the sheave barrel.
4. Verify that the driving and driven sheaves are in
alignment and the shafts are parallel. When aligning two-
groove sheaves, allow room between the sheave and
motor to get to capscrews E.
5. Insert key C between the sheave and the shaft and
tighten setscrew A securely.
6. If flange and locking ring have been removed, when
replacing them make sure that the inner and outer
flanges are open from the closed position by the same
amount as the other flange. Determine this by accurately
measuring the top width of the grooves.
7. Insert key F.
8. Tighten setscrews D and capscrews E.
9. Put on belts and adjust belt tension. Do not force belts
over grooves. See Fan Drive Belt Adjustment on page
50.
10. Be sure that all keys are in place and all setscrews
and all capscrews are tight before starting the drive.
Check and retighten all screws and retension belts after
approximately 24 hours of service.
Figure 50: LVP Type Sheave Adjustment
A
Section A-A
IM 782-12 • DESTINY AIR HANDLERS
Figure 51.
A
E
E
C
F
D
D
Section A-A
Adjusting:
1. Slack off belt tension if belts have been installed.
2. Loosen setscrews D.
3. Loosen but do not remove capscrews E.
4. Remove key F. (This key projects out a small amount to
provide a grip for removing.)
5. Adjust pitch diameter by opening or closing the movable
flanges by half or full turns. (Two-groove sheaves
are supplied with both grooves set at the same pitch
diameter.) Move both movable flanges the same
number of turns to provide the same pitch diameter for
satisfactory operation. Do not open sheaves more than
five turns for A belts or six turns for B belts.
6. Replace key F.
7. Tighten setscrews D and capscrews E. 9 Verify that all
keys are in place and all setscrews and all
8. If belts have been installed, readjust belt tension. If
belts have not been installed, install them and adjust
belt tension. Do not force belts over grooves. See
Fan Drive capscrews are tight before starting the drive.
Check and retighten all screws and retension belts after
approximately 24 hours of operation,
50.
E
C
A
F
D
B
48
Service and Maintenance
Figure 53 on page
A
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