Install Instructions

50
Fuel)
If using a conventional non-communicating heat pump unit in an iComfort dual-
fuel system then a iComfort Equipment Interface Module must be used and set
up as a communicating heat pump.
If the HD Display 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 (see procedures above).
For two-stage air conditioners you must cut the Y1-Y2 2-stage comp on-board
clippable link on the air handler control.
Communicating Air Handler and Conventional Air Conditioner
An communicating air handler (CBX32MV or CBX40UHV) with a conventional
non-communicating Lennox brand air conditioner unit.
IMPORTANT
Be sure to congure the air handler control so that heat strips (if used)
information will be detected by the thermostat. This must be done prior to
powering up the system and control system.
1. Congure air handler control (AHC) for auxiliary heat strips if used.
2. Wiring — See “Terminals and Wiring Recommendations” on page 5
and “Application Wiring” on page 7.
3. On air handler control, when matched with conventional Lennox brand
2-stage air conditioner, cut the Y1-Y2 2-stage comp on-board clippable
link.
4. On air handler control, remove jumper between W1 and W2 for two-stage
electric heat only.
5. After the entire system is wired, power up the system; the thermostat will
check the system for installed communication devices.
6. During commissioning you will arrive at the equipment found screen. From
there touch non-communicating equipment to add non-communicating
equipment.
7. From the add/remove equipment screen, touch either 1-Stage A/C unit
or 2-Stage A/C unit.
8. Touch the done to return to the equipment found screen.
9. Touch continue to proceed to the next screen.
10. Continue with the installer setup sequence. When the set up airow per
zone screen appears you can adjust blower, heating and cooling circulation
air ows. When done, press continue to proceed.
11. The dealer control center will appear. Touch tests to access the test
section.
12. Here you will have another opportunity to adjust blower circulation, heating
and cooling circulation air ows. Use the plus or minus buttons to adjust
up or down the CFM settings. Once adjustments are completed, touch
continue.
13. Under the touch test to run screen, you may un-check any tests not
required, or run all tests. Touch start tests to proceed. Once each test
section is completed, touch continue to proceed to the next group of tests.
14. Once all test are completed, touch done. The will return you to the select
tests to run screen. If nish, touch the back arrow (<) at the top left-hand
of the screen to return to the dealer control center.
15. Touch exit to return to the home screen.
TIPS
If the thermostat’s select mode screen does not offer a choice for “emergency
heat” then it may be possible that the electric heat is not working or perhaps
the electric heat has not been congured.
Congure the electric heat as described “Lennox Communicating Air Handler
Electric Heat Conguration” on page 16, or for complete detail, see the air
handler installation instruction. After conrming that the electric heat has been
congured correctly, recongure the iComfort system by going to menu >
system > advanced settings > view dealer control center > equipment >
reset > re-congure system.
Communicating Air Handler and Conventional Heat Pump Unit
An communicating air handler (CBX32MV, CBA38MV, or CBX40UHV) with a
conventional non-communicating Lennox brand heat pump unit.
IMPORTANT
Be sure to congure the air handler control so that heat strips (if used)
information will be detected by the thermostat. This must be done prior to
powering up the system and control system.
1. Congure air handler control (AHC) for auxiliary heat strips if used.
2. Wiring — See “Terminals and Wiring Recommendations” on page 5
and “Application Wiring” on page 7.
3. On air handler control:
• When matched with conventional Lennox brand 2-stage heat pump,
cut the Y1-Y2 2-stage comp on-board clippable link.
• Remove jumper between W1 and W2 for two-stage electric heat only.