Daikin RDT Installation And Maintenance Manual page 109

LVP Variable Pitch Sheaves
Mounting:
1. For single-groove sheaves, slide the sheave onto the
motor shaft so that the side of the sheave with setscrew
A is next to the motor (see
sheaves, slide the sheave onto the motor shaft so that the
side of the sheave with setscrew A is away from the motor.
2. To remove the flange and locking rings:
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 shaft barrel.
3. Be sure 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.
4. Insert key C between the sheave and the shaft and
tighten setscrew A securely.
Figure 112: LVP Variable Pitch Sleeves
www.DaikinApplied.com
Figure 112). For two-groove
Adjusting:
1. Slack off all belt tension by moving the motor toward the
driven shaft until the belts are free from the grooves. For
easiest adjustment, remove the belts.
2. Loosen setscrews D.
3. Loosen but do not remove capscrews E.
4. Remove key F. This key projects a small amount to
provide a grip for removing.
5. Adjust the pitch diameter by opening or closing the
movable flange by half or full turns. Note that two-groove
sheaves are supplied with both grooves set at the same
pitch diameter. To ensure the same pitch diameter for
satisfactory operation, move both movable flanges the
same number of turns. 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.
8. Put on the belts and adjust the belt tension. Do not force
belts over grooves. Loosen the belts by adjusting the
motor base closer to the fan shaft
9. Before starting the drive, make sure that all keys are
in place and all setscrews and all capscrews are tight.
Check and retighten all screws and retention the belts
after approximately 24 hours of operation.
109 IM 893-10 • ROOFPAK SINGLEZONE UNITS
C , T , s
heCk esT and TarT