Lennox Baltic BCK 020, Installation Operating & Maintenance Manual

Page: 34 / 110

IOM / ROOFTOP BALTIC Series - 0
8
03 - E Page 33
VENTILaTION : PULLEYS
MOUNTING AND ADJUSTING PULLEYS
Fan pulley removal
Remove the 2 screws and put one of them in the extraction
threaded screw.
Screw in fully. The hub and the pulley will separate from
each other.
Remove the hub and the pulley by hand without damaging
the machine.
Fan pulley installation
Clean and de-grease the shaft, hub and conical bore of the
pulley. Lubricate the screws and install the hub and pulley.
Position the screws without turning them.
Place the assembly on the shaft and screw in the screws
alternatively and evenly. Using a mallet or a hammer with a
wooden wedge, tap on the face of the hub to keep the
assembly in place. Torque the screws to 30 Nm.
Take the pulley in both hands and shake it vigorously to
make sure everything is in place.
Fill the holes with grease for protection.
NOTE : During installation, the key should never protrude
out of its groove.
After 50 operating hours, check that the screws are still in
place.
MOTOR PULLEY INSTALLATION AND REMOVAL
The pulley is held in position by the key and a screw located
in the groove. After unlocking, removing this screw by
pulling against the shaft spindle (if necessary, use a mallet
and tap uniformly on the hub to remove it).
To assemble, proceed in the reverse order after having
cleaned and de-greased the motor shaft and the pulley
bore.
PULLEYS ALIGNMENT
After adjusting one or both of the pulleys, check the trans-
mission alignment using a ruler placed on the inner face of
the two pulleys.
NOTE: The warranty may be affected if any major modifica-
tion is made to the transmission without obtaining our
agreement beforehand.
Fig. 31
Fig. 32
Fig. 33