Lennox ComfortSense 8500 Series - Icon by Lennox; L Connection; Equipment; Network Thermostat Control (NTC) Setup

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The following is an example on how to make connections for a occupancy sensor.
Figure 7. Occupancy Sensor Connections and 24VAC Transformer
iCON / L Connection Equipment
A single CS8500 can be connected directly to the
S-Bus connection on the Prodigy Unit Controller.
The optional settings (M2 ECTOs or M3 Parame-
ters) can be adjusted using Unit Controller software,
a PC with UC software, and L Connection PC con-
verter.
All parameters can also be set directly at the Unit
Controller. Refer to the applicable unit controller
application guide to edit the required ECTOs or pa-
rameters.
Network Thermostat Control (NTC) Setup
• NTC ECTO A4.07 is factory set to option 0
(local). In this system mode, the NTC will
operate the unit based on input from a local
sensor.
• NTC ECTO A4.07 must be set to option 1
(remote) if an L Connection communication
compatible ComfortSense 8500 is used. In
this system mode, the NTC will operate the unit
based on input from the ComfortSense 8500.