Trane Climate Changer T Series Installation Operation & Maintenance page 81

Traq™ Dampers
Traq dampers are low-leak dampers that modulate
and measure airflow. Each Traq damper 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
VCM (Transducer) Calibration The VCM has an auto-zero function that recalibrates the
transducer once every minute.
Input Power Signal The only input signal the VCM needs is the 24 VAC power
connected to terminals 1TB1-5 and 1TB1-6.
Output Velocity Signal The 2 to 10 VDC linear output signal from the VCM represents
air velocity. This voltage can be converted to represent airflow (cfm or L/s) using the
following formula, the altitude adjustment factors in Table 13, and data in your submittal
package.
Airflow = k (cfm @ 10V)
or
Airflow = k (L/s @ 10V)
For example, if the VCM on a size 30 T-Series air handler
with back inlet Traq air mixing section at sea level has
a 10-volt signal, it would represent 17,344 cfm (8185 L/
s) through the Traq damper. If the voltage were 6 volts,
airflow through the Traq damper would be 8672 cfm
(4093 L/s).
CLCH-SVX06A-EN • T-Series Climate Changer Air Handler IOM
Figure 62. Traq damper terminal connections
Figure 62.
( volts 2
–
------------------------------
8
( volts 2
–
------------------------------
8
Velocity (2–10 Vdc)
GND
24 Vac
GND
)
Table 13. Altitude adjustment factors
)
Elevation (feet)
Ventilation Control
Module (VCM)
1TB1–3
1TB1–4
1TB1–5
1TB1–6
Sea level = 1.0
k
1000 0.982
2000 0.964
3000 0.949
4000 0.930
5000 0.914
6000 0.897
7000 0.876
8000 0.860
9000 0.846
10,000 0.825
Start-Up
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