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Partial iComfort® System — iComfort® Air Handler and Non-Communicating Lennox Brand (conventional) Air
Conditioner
An iComfort® air handler (CBX32MV or CBX40UHV) with a 7. Select the Outdoor Unit Type from the device list using the
conventional non-communicating Lennox brand air
up/down arrows and press the edit button. Then select
the air conditioner type (1-stage AC or 2-stage AC) and
conditioner unit.
press the save button.
IMPORTANT! Be sure to set up the air handler control for heat
strips (if used) prior to powering up the system and thermostat. 8. On the thermostat, go past the “Add or remove
non-communicating equipment” to the “To adjust a
1. Configure air handler control (AHC) for auxiliary heat
setting” screen.
strips if used.
2. Wiring—See Communicating System and optional 9. Use the arrows to select Air Handler from system devices
list; press edit. From this air handler screen you will have
accessories Wiring diagrams.
access to the various airflow settings. Set the system air
4-conductor thermostat wire from the iComfort Wi-Fi®
volumes according the needs of the home. When you
thermostat to the air handler (R, i+, i-, C)
change certain settings, the system will prompt you to
iComfort® air handler to conventional Lennox brand
air conditioner (5 – 8 wires). (Y1, Y2, C, R, W1,W2)
“please view and save all red settings”. Use the arrows to
Wiring as required for accessories
select the red settings and press edit. Either make
3. On air handler control, when matched with conventional
changes or not, but press save either way. The red
settings will go away after pressing save. When all CFM
Lennox brand 2­stage air conditioner, cut the Y1­Y2 2
settings are complete, press the back button. Press next
stage comp on­board clippable link.
step to advance to the tests button.
4. On air handler control, remove jumper between W1 and
W2 for two-stage electric heat only.
10. Test the system operation and confirm the system is
5. After the entire system is wired, power up the system; the
electrically energized and operational. Particularly, test
the heat strips (when used) to insure the auxiliary stages
iComfort Wi-Fi® thermostat will check the system for
installed communication devices.
have been detected and are operational. Press done.
6. In the installer setup button, select Add or Remove 11. Exit the installer setup mode by selecting the EXIT button.
non-communicating equipment by pressing the yes
button.
TIPS
If the thermostat “System Setting” does not offer a choice for emerg. heat and or the electric heat will not function; the
electric heat has not been configured. Configure the electric heat as described on Page 56, or for complete detail, see
the Air Handler installation instructions. Reconfigure the iComfort® system by entering the installer program and selecting
the setup button and following the prompts.
If the thermostat System Setting only shows “heat only“ or “off“ choices and does not offer a choice for “cooling” you must
“Install” the non-communicating air conditioning unit. Select Add or Remove non-communicating under the setup button
in the Installer Section. Select Outdoor Unit Type, press the edit button and then choose “1 Stage AC” or “2 Stage AC”
and press the save button.
For two-stage air conditioners you must cut the Y1­Y2 2 stage comp on­board clippable link on the air handler control.
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