Ntc Or Unit Controller System Setups; Ntc Setup; M1 Or M2 Unit Controller Setup; M3 Unit Controller - L Connection Setup - Lennox ComfortSense 8500 Installation And Setup Manual

NTC or Unit Controller System Setups

The optional settings (M2 ECTOs or M3 Parameters)
can be adjusted using Unit Controller software, a PC
with UC software, and L Connection PC converter.
Settings do not have to be adjusted for zoned
system operation; default parameters will be used.
See the M2 and M3 application guides for additional
M2 ECTOs or M3 Parameters information.

NTC Setup

ECTO A4.07 - Set to 1. Enables remote sensor
mode in the NTC.

M1 or M2 Unit Controller Setup

The following options (M1/M2 ECTOs and M3
Parameters) must be set when the CS8500 is used.
ECTO 6.01 - Set to 4 through 7. Tells the M1/M2
unit controller what control mode and back-up set
points to use.
• 4 = Remote Demand mode with no backup.
• 5 = Remote Demand mode with local sensor
backup.
• 6 = Remote Demand mode with return air sensor
backup.
• 7 = Remote Demand mode with zone sensor
backup.
ECTO 5.27 - Set to 2, 3, 10, or 11, depending on
the options available. Zone temperature reading is
standard on all models. Setting tells the M1/M2 unit
controller where to get zone temperature, CO
indoor RH input.
• 2 = Zone temperature (A2)
• 3 = Zone temperature and IAQ (A63)
• 10 = Zone temperature and indoor RH (A91)
• 11 = Zone temperature, IAQ, and indoor RH
ECTO A4.07 - Set to 1. Enables remote sensor
mode in the network thermostat controller (NTC).
M3 Unit Controller — L Connection Setup
To enable the M3 Unit Controller to use the CS8500,
use the following procedure:
1. Set CONFIGURATION ID1, position 5 to N.
2. Go to
INTEGRATION.
3. Use the adjust and set values arrows to display
L-CONNECTION and press the SAVE button
to continue.
Adjust the L-CONNECTION ADDRESS if
4.
required and press SAVE button to continue.
NOTE: In most cases both the L-Connection
address setting and CS8500 address
setting will need to be exactly the same.
One exception would be in multi-zone
applications.
5. CONTROL MODE will need to be set to
NETWORK THERMOSTAT. Press the SAVE
button to continue.
6. NETWORK SENSOR > CO2 (if equipped)
needs to be set to YES if needed. Press the
SAVE button to continue.
, and
2
11
SETUP and select NETWORK