Lennox ComfortSense 8500 Installation And Setup Manual page 22

• When damper invert option is set to ON,
the analog control for the damper actuator
is a 2-10VDC with 2VDC being fully closed.
The CS8500 uses percent (%) for bypass
damper position. For example, 30% bypass
damper position equals 4.4VDC.
Table 7. Damper Invert is OFF
Damper Position (%)
0 (closed)
10
20
30
40
50
60
70
80
90
100
Control Voltage (VDC)
10.0
9.2
8.4
7.6
6.8
6.0
5.2
4.4
3.6
2.8
2.0
Table 8. Damper Invert is ON
Damper Position (%)
0 (closed)
10
20
30
40
50
60
70
80
90
100
22
Control Voltage (VDC)
2.0
2.8
3.6
4.4
5.2
6.0
6.8
7.6
8.4
9.2
10.0