Home
href="
INSTALLER’S SYSTEM SETUP  
GUIDE  
ꢀ 2012 Lennox Industries Inc.  
Dallas, Texas, USA  
icomfort Wi-Fiꢀ Thermostat  
Touch Screen Programmable Communicating Thermostat  
CONTROLS  
away  
mode  
506920−01  
09/12  
Supersedes 05/12  
outdoor  
temperature  
indoor temperature  
set temp  
heat  
or  
cool  
80  
75  
cool−to  
icomfortꢀ−Enabled Units  
fan is  
AUTO  
72  
AOUFTFO  
heat to  
G71MPP−03 or later  
SLP98−01 or later  
SL280−03 or later  
XC17−02 or later  
XP17−02 or later  
XP19−06 or later  
XC21−05 or later  
XP21−01 or later  
indoor humidity is 41%  
system is cooling  
EL296V−01 or later  
CBX40UHV−02 or later  
CBX32MV−06 or later  
9:39 am Aug 15, 2012  
Wi−Fi  
Shipping and Packing List  
THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER  
FOR FUTURE REFERENCE  
1 − icomfort Wi-Fiꢁ thermostat  
4 − Mounting Screws  
4 − Wall Anchors  
1 − Installation Quick-Start Guide  
1 − Installer’s System Setup Guide  
1 − Homeowner’s Manual  
1 − Warranty card  
NOTICE  
Read this manual before programming this thermostat.  
Use this thermostat only as described in this manual.  
09/12  
506920−01  
*2P0912*  
*P506920-01*  
href="
Table 6. Troubleshooting Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55  
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59  
Thermostat wire termination in communicating system . . . . . . . . . . . . . . . . 63  
Table 7. Replacement Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72  
Table of Contents  
Page  
Technical Description/Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Installation and Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
System Settings screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Change settings (dealer info, daylight savings, fan circulate) . . . . . . . . . . .  
Table 1. System settings defaults and ranges . . . . . . . . . . . . . . . . . . . . . . .  
Set Time and Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Add or Remove Non−communicating equipment . . . . . . . . . . . . . . . . . .  
Maintenance Timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
3
4
4
5
6
7
9
9
Setting up typical icomfortꢀ systems  
Indoor Unit  
Outdoor Unit  
icomfort enabled AC  
non−communicating AC  
icomfort enabled HP  
non−communicating HP  
icomfort enabled AC  
non−communicating AC  
icomfort enabled HP  
non−communicating HP  
page  
65  
icomfort−enabled  
furnace  
66  
67  
icomfort−enabled  
furnace (dual fuel)  
Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
Humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Dehumidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
Adjust a setting screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
Configure Humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Configure Dehumidifier (Humiditrol®/Aux. Dehum. installed) . . . . . . . . 16  
Configure Dehumidification (no dehumidifier installed) . . . . . . . . . . . . . . 17  
Humidification and Dehumidification Modesꢀhow they work . . . . . . . . . . . 18  
Use the Test Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
Set up Equipment Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20  
Use the Diagnostic Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21  
View and Clear Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22  
Enable Wi−Fi from User Home Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24  
Register the icomfort Wi-Fiꢁ thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26  
Personal Computer account registration to icomfort Wi-Fiꢁ server . . . . . . 26  
PC Welcome screen, interactive demo, Gelaskins . . . . . . . . . . . . . . . . . . . . 27  
Access Installer Program from User Home Screen . . . . . . . . . . . . . . . . . . . 28  
Reconfigure a System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29  
Stage Delay Timers & Differentials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30  
Smooth Setback Recovery (SSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31  
Heat Pump, Dual Fuel and Balance Points . . . . . . . . . . . . . . . . . . . . . . . . . . 32  
Gas Heat Control Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34  
Table 2. Variable Capacity Furnace Operation . . . . . . . . . . . . . . . . . . . . . . . 35  
Table 3. Adjustable Parameters (Installer) . . . . . . . . . . . . . . . . . . . . . . . . . . . 37  
Table 4. Adjustable Parameters (User) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43  
Table 5. Alert Codes and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 45  
Homeowner Service Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54  
not supported  
68  
69  
70  
71  
icomfort−enabled  
air handler  
icomfort−enabled  
air handler  
CAUTION  
This is a 24VAC Class 2 thermostat. Do not install on voltages higher than  
30VAC.  
Do not switch system to cool if the outdoor temperature is below 45°F  
(7°C). This can damage the cooling system.  
WARNING  
Electric shock hazard.  
Always turn off power at the main power source by switching the circuit  
breaker to the OFF position before installing or removing this thermostat.  
All wiring must conform to local and national building and electrical  
codes and ordinances.  
506920−01 09/12  
Page 2  
href="
icomfortWi-Fiꢀ Thermostat − Technical Description and Features  
The 24VAC icomfortWi-Fiꢁ thermostat (figure 1) is an electronic communi-  
cating, color display touchscreen, 7−day programmable thermostat. It stores  
system parameters and settings in nonvolatile memory (i.e., it retains data  
when electrical power fails or is turned off). It is designed for 4−wire connec-  
tion to other communication devices as listed in figure 1.  
BEST PRACTICES! Keep all communication wiring as far away from house  
electrical wiring and large electrical appliances as possible (15’ [5m] recom-  
mended).  
The thermostat also:  
ꢂ
ꢂ
supports three languages (English, French, Spanish),  
supports air conditioning units or heat pump units with up to four stages  
of heat / two stages of compressor operation (2 stages of heat pump  
heating, 2 stages of auxiliary back−up heating, 2 stages of emergency  
heating),  
The icomfortWi-Fiꢁ thermostat can connect to online services via the inter-  
net through the homeowner’s Wi−Fi access point. After online registration is  
completed, the system may then be accessed by the homeowner from any-  
where using a remote internet connection via computer or personal commu-  
nicating device.  
ꢂ
ꢂ
supports Indoor Air Quality with time-based notification of consum-  
ables including media filters, UVC bulbs, humidifier pads, and Pure-  
Airꢁ system catalyst service / replacement,  
supports variable−capacity / multi−stage heat/cool, universal compati-  
bility (gas/electric/heat pump/ac), and is dual fuel capable (icomfort−  
enabled HP only) with two balance points.  
Thermostat  
connections  
R
i+ i− C  
Important  
Connections to non−communicating outdoor units and accessories are de-  
scribed in the Quick−Start Installation guide. (Wiring diagrams are also  
shown beginning on Page 59 of this manual.)  
Maximum total length of all  
connections on the RSBus is  
limited to 1500 ft. (450 m).  
Max. length between compo-  
nents is 300 ft. (90 m).  
Supports  
RSBus  
ꢂ
ꢂ
ꢂ
ꢂ
ꢂ
ꢂ
ꢂ
Humidification Measurement and Control,  
Dew Point Adjustment Control  
Dehumidification Measurement and Control  
Humiditrol Enhanced Dehumidification Accessory (EDA)  
Multi-Stage HVAC Systems  
Minimum wire  
size is 18 gauge  
®
icomfortꢁ −enabled Furnace Control  
icomfortꢁ −enabled Air Handler Control  
icomfortꢁ −enabled Outdoor Unit Control  
Note: icomfort  
Wi-Fiꢁ thermo-  
stat does not  
require  
Equipment Maintenance Reminders  
AutochangeoverMode −− Permits control of heating, cooling, humidifi-  
cation, and dehumidification without user involvement.  
External Sensors − outdoor temperature, discharge air  
Humidify Control  
shielded cable  
wiring.  
Outdoor Temperature Sensor (option)  
Dehumidify Control  
Figure 1. icomfort by Lennoxꢀ system  
Communicating outdoor units contain a built−in outdoor temperature sensor.  
icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat  
Page 3  
 
href="
Installation and Setup  
IMPORTANT! Make sure the router is capable of, and set to operate in  
wireless network ꢀb" mode. Check router utility program or contact  
service provider for help. When determining the location for the Wi−Fi ther-  
mostat, be sure it is in an area near enough to the homeowner’s Wi−Fi router  
to ensure good communications signal between the thermostat and the rout-  
er. (Hint: use a smart phone with Wi−Fi to find and determine signal  
strength.)  
ꢁSystem settingsꢁ (figure 2) appear first. As you use the up/down arrows to  
scroll through the settings, the right hand side will show the current value.  
For example, current value: 9:39 am Aug 15, 2012 shows the current date  
for Time and Date.  
To adjust a setting, highlight it, then  
press edit  
system settings  
Time and Date  
Refer to the Quick Start Guide for information about installing the thermostat  
on a wall and for wiring diagrams for field wiring the thermostat to the system  
using one of a number of possible configurations. (Wiring diagrams are also  
shown beginning on Page 59 of this manual.)  
current value:  
Daylight Saving Time  
Circulate Fan ON Time  
System Name  
9:39 am Aug 15, 2012  
NOTE − If electric heat strips are used with an icomfortt−enabled air handler,  
the strips MUST be configured on the air handler control (AHC) board before  
beginning the ꢀdiscovery" sequence below.  
Dealer Number  
Dealer Name  
edit  
Dealer Address  
Dealer Phone  
After all wiring connections are made, apply power to the system. 24VAC will  
power up the thermostat.  
Dealer Email  
back  
After power is applied to the thermostat for the  
first time, the processor checks the system for  
installed communicating devices, the ꢁSo Sim-  
ple. So Smart. So Comfortable" screen dis-  
plays; followed by ꢁUse this thermostat?"  
screen. Touch press here to continue. During  
next  
Dealer Website  
9:39 am Aug 15, 2012  
Figure 2. ꢀSystem settings" screen  
(Thermostat 1)  
Use this Thermostat?  
the setup process, alerts may pop open to provi-  
de the installer with information that affects the  
press here  
setup. Correct the cause of any such alerts  
prior to continuing setup.  
506920−01 09/12  
Page 4  
 
href="
Change settings  
Circulate Fan ON Time Range  
is 15 to 50 %  
Default is 35, inc: 1  
up/down  
arrows  
If you want to change a setting, use one of the Settings change tools shown  
in figure 3. (Also, see Set time and date on Page 7.) After changes have  
been made, use save to store the changed data or cancel to exit the screen  
and return to the list of settings.  
set−to  
45%  
save  
cancel  
Dealer Number  
radio  
buttons  
Use the arrows to scroll to the Dealer Number setting. Press edit and use the  
typewriter tool (shown in figure 3) to enter your dealer number. Press save to  
store the identification.  
Outdoor Unit Type  
Select one  
Not Installed  
1 Stage A/C Unit  
1 Stage HP Unit  
2 Stage A/C Unit  
2 Stage HP Unit  
system settings  
To adjust a setting, highlight it, then  
press edit  
Time and Date  
Daylight Saving Time  
Circulate Fan ON Time  
System Name  
current value:  
save  
cancel  
Dealer Number  
Dealer Name  
keyboard  
tool  
Dealer Name  
edit  
Dealer Address  
Dealer Phone  
Dealer Email  
Dealer Website  
back  
next  
9:39 am Aug 15, 2012  
Figure 3. Settings change tools  
Figure 4. Entering ꢀDealer Number"  
icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat  
Page 5  
 
href="
Circulate fan ON time setting  
Table 1. System setting defaults and range  
default  
system  
setting  
range/  
condition  
use  
NOTE − If the circulate fan mode is on, a timer is set to measure all the time  
that the fan is blowing, regardless if it is running to deliver heating or cooling  
or just for circulation.  
Time and Date  
see Page 7  
Enabled  
Daylight Saving  
Time  
ꢁCirculate" is enabled on the user’s home screen or system settings page.  
It keeps air circulating from 15% to 50% percent of time. The following set-  
tings approximate how long the fan will run at these typical settings:  
Enabled/Disabled  
Circulate Fan  
ON Time  
15 to 50% (in 1%  
increments)  
35%  
15% (9 minutes fan run time per hour)  
25% (15 minutes fan run time per hour)  
35% (21 minutes fan run time per hour)  
45% (27 minutes fan run time per hour).  
(alpha−numeric  
characters)  
use keyboard  
tool to change  
System Name  
Dealer Number  
ꢀ
****  
Table 1 shows the range/condition and defaults for the system settings and  
indicates the tools used to make changes.  
Dealer Name  
Dealer Address  
Dealer Phone  
Dealer Email  
Lennox  
ꢀ
(alpha−numeric  
characters)  
use keyboard  
tool to change  
1−800−9−LENNOX  
ꢀ
Dealer Website  
www.lennox.com  
506920−01 09/12  
Page 6  
 
href="
Set time and date  
Use the arrows to select Time and Date;press edit (see figure 5) to proceed  
to the ꢁSet current time and date" screen (figure 6).  
When ꢁTime and Date" screen (figure 6) appears, enter the correct date as  
follows:  
ꢂ
ꢂ
ꢂ
ꢂ
ꢂ
Use the left and right arrows to change the month and year.  
Touch a day of the month to select it.  
To adjust a setting, highlight it, then  
press Edit  
system settings  
Press on the hour or minute; up down arrows appear to allow change.  
Touch the am/pm field to toggle it between am and pm.  
Time and Date  
current value:  
Daylight Saving Time  
9:39 am Aug 15, 2012  
Circulate Fan ON Time  
When the correct date and time is set, press save to save settings and  
return to previous settings screen.  
System Name  
Touch next to continue to next screen.  
Dealer Number  
edit  
Dealer Name  
Dealer Address  
Dealer Phone  
Dealer Email  
system settings  
January 2012  
S
1
M
2
T
3
W
4
T
5
F
6
S
7
back  
next  
Dealer Website  
09 : 39 am  
9:39 am Aug 15, 2012  
8
9
10 11 12 13 14  
15 16 17 18 19 20 21  
22 23 24 25 26 27 28  
29 30 31  
Figure 5. View/edit time and date  
save  
9:39 am Aug 15, 2012  
Figure 6. Set current time and date  
icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat  
Page 7  
 
href="
Use ꢀabout" screen & access ꢀAdd or Remove Non−communicating equipment" screen  
The ꢁabout" screen shows details of discovered installed equipment.  
From the ꢁsystem devices" screen, use arrow buttons to scroll to a device; then press the about button. Use the up/down arrows to scroll through and view  
additional information about the selected device. When finished viewing, press the back button.  
Press next to advance to the ꢁAdd or Remove Non−communicating equipment?" screen.  
device feature list  
Language Support  
device description  
Equipment Type Name  
Furnace  
Unit Model Number  
Unit Serial Number  
Equipment Type Name  
Furnace  
system devices  
System  
press ’about’ for  
more information on  
a highlighted device  
Unit Nominal Capacity  
Number of Heating Stages  
Heating Capacity by Stage  
Indoor Blower CFM Range  
Control Software Revision  
Control Model Number  
about  
(returns to  
system  
devices  
screen)  
Heat Pump  
Furnace  
Thermostat  
back  
Add or Remove  
Non−communi-  
cating equip-  
ment?  
system devices  
System  
yes  
back  
next  
Heat Pump  
Furnace  
9:39 am Aug 15, 2012  
Thermostat  
If no, press Next  
Step.  
back  
next  
Figure 7. Using the ꢀabout" screen and accessing ꢀAdd or Remove Non−communicating equipment" screen  
506920−01 09/12  
Page 8  
 
href="
Add or Remove Non−communicating equipment  
Figure 7 (previous page) shows how to access the ꢁAdd or Remove Non−  
communicating equipment" screen.  
HUMIDITY CONTROL TIPS  
The standard humidification mode is ꢁBasic" (humidifier is energized  
during a call for heat, if there is a humidification demand).  
ꢂ
ꢂ
Sensed outdoor temperature, required for some features, is provided  
from one of the following sources:  
Adding Non−Communicating Outdoor unitꢀSee figure 8 for details  
for adding/removing an outdoor unit.  
A
B
C
downloaded via Wi−Fi when available (primary source),  
sensor furnished with icomfortꢁ−enabled outdoor units,  
separate outdoor sensor connected to the furnace or air handler  
ꢁoutdoor sensor" connections.  
Adding HumidifierꢀThe procedures in figure 9 describe adding a non−  
communicating humidifier which will be controlled by the icomfort Wi-Fiꢁ  
thermostat through the ꢁH" or ꢁHUM" terminals on the furnace or air handler.  
NOTE − If no source for outdoor temperature is present, ꢀBasic and  
Precision Dew Point Control" modes are not available.  
Adding DehumidifierꢀThe procedures in figure 10 describe adding a  
non−communicatingdehumidifier controlled by the icomfort Wi-Fiꢁ thermo-  
stat through the ꢁDH" output on the furnace or air handler.  
ꢂ
If you do not have the ability to select or adjust the Humidity RH set-  
point on the ꢀIndoor Humidity" button, the control is set for ꢁDisplay  
Only." In the installer program, go the equipment button and select  
ꢁSystem" and press the edit button. Select ꢁHumidification Control  
Mode" and press edit. Choose ꢁBasic," ꢁPrecision," ꢁBasic Dew Point  
Control" or ꢁPrecision Dew Point Control" and press save.  
Adding non−communicating accessoriesꢀAdding maintenance  
timer reminders to accessories is a simple process of ꢁinstalling" the device,  
which effectively tells the thermostat to activate access to its service timers.  
NOTICE  
For details about how the humidification and dehumidification  
modes operate and how to configure those modes, see additional in-  
formation beginning on Page 18.  
Timers are available for two (2) filters, Humidifier pad, UV bulb maintenance  
and the PureAirꢁ Air Purification system.  
icomfort Wi-Fiꢁ 7−Day Programmable Communicating Thermostat  
Page 9  
 
href="
Add Non−Communicating Outdoor unit  
To add (or remove) an outdoor unit that is not icomfortꢁ −enabled, you must be at  
the ꢁAdd or Remove Non−communicating equipment?" screen.  
1. Press the yes button on this screen (see 1).  
Add or Remove  
Non−communicating  
equipment?  
System Devices  
2. In the ꢁnon−communicating device list" screen, use the arrows (2a) to  
highlight Outdoor Unit Type and press edit (2b).  
yes  
1
System  
3. Touch one of the radio buttons (3a) to select a 1−or 2−Stage AC Unit or a  
1−or 2−Stage HP Unit; press save (3b).  
Furnace  
4. Use arrows (4a) to highlight any red colored text in the device list (e.g.  
select Outdoor Unit Capacity; text turns white). Press edit (4b).