icomfort Touch
7−Day Programmable Communicating Thermostat
Page 39
Setting up typical systemsFURNACE & HEAT PUMP (DUAL FUEL)
icomfort
−enabled Furnace & icomfort
−enabled HP unit
(Dual fuel)
Dual fuel system using an icomfort−enabled gas furnace
(G71MPP, SLP98, SL280) with an icomfort−enabled heat
pump (XP17 or XP21 only).
1.
Wiring
see
Communicating System Wiring
diagram
on Page
34 and
Optional Accessories Wiring
(Page 35) for any accessories being installed with the
system.
4−conductor thermostat wire from the icomfort Touch
thermostat to the gas furnace (R, i+, i−, C)
4−conductor thermostat wire from the furnace termi-
nal strip to the icomfort−enabled HP (R, i+, i−, C)
Wiring as required for accessories
2.
DO NOT
cut any option link on furnace control.
3. After the entire system is wired, power up the system; the
icomfort Touch
thermostat will check the system for
installed communication devices.
4. On the thermostat, go past the add/remove non−commu-
nicating devices" to the adjust a device" screen. Select
the system 49W95 from the device list using the up/down
arrows and press the
edit
button
5. Select Balance Point Control and press
edit
. Use the
down arrow to select Enabled" and press
save
. High and
Low Balance Points will appear in red.
6. Complete Balance Point Control by editing the High and
Low Balance Points. It is not necessary to change the de-
faults, 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.
7. Use the arrows to select Furnace" from system devices
list; press
edit
. From this Furnace screen you will have
access to the various airflow settings. Set the system air
volumes according the needs of the home. When you
change certain settings, the system will prompt you to
please view and save all red settings". Use the arrows
to select the red settings and press
edit
. Either make
changes or not, but press
save
either way. The red set-
tings will go away after pressing
save
. When all CFM set-
tings are complete, press the
back
button. Press
next
step
to advance to the tests tab.
8. Test the system operation and confirm the HP unit is elec-
trically energized and operational. Press
done
.
9. Exit the installer setup mode by selecting the
EXIT
tab.
TIPS
High & Low Balance points are enabled and adjusted un-
der the installer section of the thermostat. In the equip-
ment tab select System 49W95" and press
edit
. Scroll
down to Balance Point Control" and press
edit
and se-
lect
Enabled
and then
save
.
An outdoor temperature sensor is provided in an icom-
fort−enabled heat pump unit. To display the outdoor tem-
perature 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
tab. Press the
user preferences
box and scroll
down to Outdoor Temp Display". Press the
modify
but-
ton and use the up/down arrows to select
On
(or Off) and
then press the
save
button. Press
done
to return to the
Home screen.
Turn the Indoor Humidity Display on and off in a similar
manner as above.
Gas heat is not provided to temper the air during defrost
cycles.
icomfort
−enabled Furnace &
non−communicating HP unit (Dual fuel)
NOTE − DO NOT use a conventional non−communicating
heat pump unit in an icomfort dual fuel system.
TIPS
A conventional thermostat capable of controlling a dual
fuel system, like the ComfortSense
®
7000, must be se-
lected for this type of application.
