IM 926-3 • ROOFPAK APPLIED SYSTEMS 104 www.DaikinApplied.com
Check, Test, and Start Procedures
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
sheaves, slide the sheave onto the motor shaft so that
the side of the sheave with setscrew A is away from the
motor (see
).
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.
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.
Both movable flanges must be moved
the same number of turns to ensure 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.
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 re-tension the belts
after approximately 24 hours of operation.
Figure 118: LVP Variable Pitch Sleeves
Summary of Contents for RoofPak RCS Series
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