Setpoint Range And Sensor Calibration; Troubleshooting - Lennox ComfortSense 8500 Installation And Setup Manual

Setpoint Range and Sensor Calibration

There is a set point adjustment range except when
the zone is in manual mode.
• Internal temperature offset calibration.
• External temperature offset calibration.
• RH offset calibration.

Troubleshooting

Make sure the CS8500 is displayed on the NCP
network list. If the CS8500 is not displayed:
1. Make sure 24VAC is supplied to the CS8500.
2. Make sure the CS8500 address setting
is different from all other CS8500s on its
ZoneBus.
3. Check communication cable wiring: the red and
black leads should be connected to CS8500's
CM- and CM+ terminals.
• Make sure connections are correct at the
Zone Link and unit.
• Verify communication using LEDs on the
Zone Link and IMC or NTC.
4. Make sure the IMC or NTC is setup for zoning
application. Refer to the Zone Link installation
instruction.
5. Re-poll the network at the NCP (see NCP
user's manual).
Verify that the sensor data from the CS8500 display
matches the NCP zone data screen.
15