Align Fan And Motor Sheaves; Check Multiple Belts; Airflow Measuring Systems; Traq™ Dampers - Trane Climate Changer TCFS Nstallation, Operation, And Maintenance

Align Fan and Motor Sheaves

Align the fan and motor sheaves using a straightedge. The
straightedge must be long enough to span the distance
between the outside edges of the sheaves. When the
sheaves are aligned, the straightedge will touch both
sheaves at points A through D (see
the shaft is parallel. For uneven width sheaves, place a
string in the center groove of both sheaves and pull tight.
Adjust the sheaves and tighten the sheave set screws to
the proper torque given in

Check Multiple Belts

Tighten the belts slightly and rotate the drive several
times.
On multiple belt drives, ensure the force of deflection is
approximately the same on each belt by pushing each belt
in an equal distance at a point halfway from each sheave
(see Figure 64). If this force is not the same for each belt,
the motor and fan shaft are not parallel. Realign as
required. After realignment, tighten the belts again to the
standard belt tensioning specifications. If the force is still
not the same for all belts, the belts or sheaves are worn
and must be replaced.
Table 3. Set screw torque settings (inches)
Screw Size Hex Key
1/4 1/8
5/16 5/32
3/8 3/16
7/15 7/32
1/2 1/4
5/8 5/16
#10 3/32

Airflow Measuring Systems

Traq™ Dampers
Traq dampers are low-leak dampers that modulate and
measure airflow. Each Traq damper section is supplied
with a factory-mounted ventilation control module (VCM)
on the interior of the mixing box section. The VCM has an
input terminal for power and an output terminal for air
velocity (see Figure 65). A direct-digital controller controls
the factory-mounted and wired actuators.
CLCH-SVX010A-EN
Figure 64) to confirm
Table 3.
Square Head
3/8
1/2
9/16
5/8
3/4
15/16
-
Figure 64. Proper drive alignment
Fixed
Sheave
Hex Head Torque (in.-lb.)
7/16 66-90
1/2 126-164
9/16 228-300
5/8 348-450
3/4 504-650
15/16 1290-1390
- 28-40
Figure 65. Traq damper terminal connections
Velocity (2-10 Vdc)
GND
24 Vac
GND
Thermistor
Center line
Lines must
must coincide
be parallel
D
Fixed
Sheave
C
Straight
Edge
B
A
Adjustable
Sheave
Torque (ft.-lb.)
5.5-7.5
10.5-13.7
19.0-25.0
29.0-37.5
42.0-54.2
107.0-116.0
2.3-3.3
Ventilation Control Module
J4 (Red)
J4 (White)
J2 (Black)
J2 (Green)
J5 (Yellow)
J5 (White)
Start-Up
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