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506920−01 09/12
Page 70
Setting up typical systemsĊAIR HANDLER & HEAT PUMP UNITS
icomfortt−enabled Air Handler & icomfortt−enabled Heat Pump unit
An icomfort air handler (CBX32MV or CBX40UHV) with an icomfort−enabled
heat pump (XP17 or XP21 only) unit.
NOTE − IMPORTANT! Be sure to set up the air handler control for heat strips
(if used) prior to powering up the system and thermostat.
1. Configure air handler control (AHC) for auxiliary heat strips if used.
2. WiringĊSee Communicating System Wiring diagram on Page 59
and Optional Accessories Wiring (Page 61) for any accessories be-
ing installed with the system.
D 4−conductor thermostat wire from the icomfort Wi-Fit thermostat
to the air handler (R, i+, i−, C)
D 4−conductor thermostat wire from the air handler terminal strip to
the icomfort−enabled HP (R, i+, i−, C)
D Wiring as required for accessories
3. DO NOT cut any option link on air handler control.
4. After the entire system is wired, power up the system; the icomfort Wi-
Fit thermostat will check the system for installed communication de-
vices.
5. On the thermostat, go past the Add or remove non−communicating de-
vices" to the To adjust a setting" screen. Select the System" from the
device list using the up/down arrows and press the edit button
6. Select Balance Point Control and press edit. Use the down arrow to
select Enabled and press save. High and Low Balance Points will ap-
pear in red.
7. Complete Balance Point Control by editing the High and Low Balance
Points. It is not necessary to change the defaults, but you must save
each setting. The red settings will go away after pressing save. Press
the back button to return to the adjust screen.
8. Use the arrows to select Air Handler from system devices list. Press
edit. From this Air Handler screen you will have access to the various
airflow settings. Set the system air volumes according the needs of the
home. When all CFM settings are complete, press the back button.
Address any red settings as described in steps 6 and 7. Press next
step to advance to the tests button.
9. Test the system operation and confirm the system is electrically ener-
gized and operational. Particularly, test the heat strips (when used) to
ensure the auxiliary stages operate as designed. Press done.
10. Exit the installer setup mode by selecting the EXIT button.
TIPS
S 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 64,
or for complete detail, see the Air Handler installation instructions. Re-
configure the icomfort system by entering the installer program and se-
lecting the setup button and following the prompts.
S High & low balance points are enabled and adjusted under the installer
section of the thermostat. In the equipment button select System" and
press edit. Scroll down to Balance Point Control" and press edit and
select Enabled and then save.
S An outdoor temperature sensor is provided in an icomfort enabled heat
pump unit. To display the outdoor temperature on the home screen of
the thermostat, you must turn on (or off) the Outdoor Temp Display".
From the Home screen, press press for more area and select the
HELP icon. Press the user preferences box and scroll down to Out-
door Temp Display". Press the modify button and use the up/down ar-
rows to select On (or Off) and then press the save button. Press done
to return to the Home screen.