Trane QFNA-IOM-1 - Manual (Page 12)

Caution:
When the customer is providing
drives and/or motor, the Trane
Company will not assume any
responsibility for damages
occurring due to selected
drives or motors.
Installation of Motor and
Beltguard When NOT
Factory Installed
Arrangement 9
1. Remove the belt guard from
the shipping position. Remove
the screws on two sides along
the edge (the number varies
with the fan size). Lift the guard
off.
2. If needed, reposition the belt
tightener to correspond to the
specific belt length and motor
frame (drive center line). (See
Figure 3).
3. To mount the motor, first turn
the adjusting screws for the
belt tightener (angles or base
plate) down as far as possible.
4. Bolt the motor to the belt
tightener. Before final
tightening, center the motor on
the belt tightener.
5. Check the motor rotation to be
sure the fan will rotate in the
direction shown in Figure 4
when the drive is installed.
6. Disassemble the belt guard by
removing the clips or screws
that hold the front and rear
panels together. See Figure 5.
Slip the rear panel assembly of
the belt guard over the shaft so
that the shaft protrudes
through the rubber block-off to
belt guard. On fans sizes
49-60, secure the rubber
block-off by putting a crimp in
the slots holding block-off to
belt guard. See Figure 6.
Locate the edge of the rear
panel assembly on gasketing
approximately 1/4" from the
drive hole. Refer to Figure 7.
Center the rear panel over the
drive hole in the shell and
secure with the self-drilling
screws provided as shown in
Figure 8.
Arrangement 1
Remove the motor pedestal
support and belt guard from the
top of the unit and bolt the “F”
shaped pedestal support to the
unit as illustrated in Figure 2.
Mount slide rail base to pedestal.
Bolt the motor to the slide rail
base. Disassemble the belt guard
by removing the self-tapping
screws. Slip the rear side
assembly of the belt guard over
the motor shaft so that the shaft
protrudes through the rubber
block-off. See Figure 6. Locate the
edge of the rear side assembly of
the belt guard on gasketing
approximately 1/4" from the edge
of the drive hole in the fan shell.
The motor should be as close to
the fan shaft centerline as the
slide rail base will permit.
Fasten the front side assembly of
the belt guard to the rear side
assembly already in place on the
unit with the self-tapping screws
provided. The polyurethane
gasket must remain in position
during this operation. Drill pilot
holes in the shell using the front
side assembly as a template and
attach to the shell with screws
proved in Figure 8. Attach support
leg and angle with screws
provided.
Installation —Q Fan
12 QFNA-IOM-1