Lennox icomfort User manual

*2P1109* *P506052-01*
2009 Lennox Industries Inc.
Dallas, Texas, USA
INSTALLER’S SYSTEM SETUP
GUIDE
icomforttThermostat
Touch Screen Programmable Communicating Thermostat
CONTROLS
506052−01
11/09
Shipping and Packing List1
1 − icomfortTouch Screen Communicating, 7−day Programmable
Thermostat
6 − Mounting Screws
6 − Wall Anchors
1 each − Installation Quick-Start Guide, Installer’s System Setup Guide,
Homeowner’s Manual, Warranty card, Warranty Audit tag
Litho U.S.A.

506052−01 11/09 Page 2
Table of Contents
icomfortThermostat Terms and Acronyms 3. . . . . . . . . . . . . . . . .
icomfortTechnical Description 4. . . . . . . . . . . . . . . . . . . . . . . . . . .
icomfortThermostat Features 5. . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing icomfortThermostat 5. . . . . . . . . . . . . . . . . . . . . . . . . . .
Installer setup 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System settings 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting time and date 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Add/remove/modify non−communicating devices 9. . . . . . . . .
Modify communicating device settings 10. . . . . . . . . . . . . . . . . .
Indoor air quality controls 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tests 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostics 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alerts 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Access installer program from User Home screen 22. . . . . . . . . . . .
Reconfiguring a system 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Editable parameters table (user and Installer) 25. . . . . . . . . . . . . . . .
Alarm Codes and Descriptions 31. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Diagrams 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WARNING
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 electri-
cal codes and ordinances.
Do not switch system to cool if the outdoor temperature is below
45°F (7°C). This can damage the cooling system.
CAUTION
This is a 24VAC low−voltage thermostat. Do not install on volt-
ages higher than 30VAC.
Do not short (jumper) across terminals on the gas valve or at the
system control to test installation. This will damage the thermo-
stat and void the warranty.
IMPORTANT
Read this manual before programming this thermostat.
Use this thermostat only as described in this manual.

icomfortTouch Screen 7−Day Programmable Thermostat
Page 3
icomforttThermostat Terms and Acronyms
Subnet Controller (SC): (part of the communicating thermostat) Local
device that controls the system.
Subnet: A part of the communication network that contains devices to
control one functional HVAC system.
RSBus − Residential Serial Bus − the means for transmitting data within
the communicating system.
Controller Area Network Protocol: Rules for networking, for transmis-
sion and receipt of information between communicating systems.
Baud Rate: Maximum speed of BUS 40K baud.
Byte: 8 bits of information transmitted on the RSBus.
Integrated Furnace Control (IFC): Communicating control for furnace.
IFC controls ignition, CAI, blower, and monitors all safety features in the
unit.
Air Handler Control (AHC): Communicating control for air handler
units. AHC controls operation of blower, heat strips, and monitors all
safety features in the unit.
HP Control (Defrost Control) (UC): Communicating defrost control.
UC controls low and high speed compressor operation, defrost opera-
tions, fan motor, and reversing valve and monitors all safety features in
the unit.
AC Control: Communicating air conditioning control. AC controls low
and high speed compressor operation, fan motor operation, and all safe-
ty monitors in the unit.
Discharge Air Sensor (DAS): Communicating discharge air sensor.
Provides discharge air temperature to Bus, UI, and IFC for proper opera-
tion of equipment.
R: 24V power
C: 24V common
i+: + data information connection
i−: − data information connection
Configuration: Function that accrues during setup of system to identify
other communicating devices. Configuration is also used in setup of a
variable capacity furnace to properly set furnace parameters.
Memory Fault Recall: Method of checking for errors
Firmware: Software stored on a memory chip instead of being part of a
program
Software: Programming and applications for computer

506052−01 11/09 Page 4
icomforttTechnical Description
The 24VAC icomfortthermostat stores system parameters and set-
tings in a nonvolatile memory (i.e., it retains data when electrical power
fails or is turned off). The thermostat (see figure 1) also:
includes on-board help screens,
supports heat pumps or non−heat pump units, with up to 4 stage
heat / 2 stage compressor operation. (2 stages of heat pump heat-
ing and 2 stages of auxiliary backup heat are provided. Also, 2
stages of emergency heat are provided),
supports Indoor Air Quality with time-based notification of consum-
ables including media filters, UVC bulbs, humidifier pads, and
PureAircatalyst service / replacement,
supports variable capacity / multistage heat/cool, universal com-
patibility (gas/electric/heat pump/ac), and is dual fuel capable with
two balance points.
Important
Always use correct software version as recommended for replacement
configuration (discovery).
Connections to non communication outdoor units and all accessories is
described in the Quick−Start Installation guide. (Wiring diagrams are also
shown beginning on Page 36.)
Thermostat
connections
RSBUS
Minimum wire size is
18 gauge
icomfortOutdoor Units Control
icomfortFurnace Control
icomfortAir Handler Control
External Sensors − outdoor temperature and humidity
Humidify control
Dehumidify control
R I+ I − C
Maximum total length
of all connections on
the RSBus is limited
to 1500ft.
Figure 1. icomfort thermostat system

icomfortTouch Screen 7−Day Programmable Thermostat
Page 5
icomforttThermostat Features
Thermostat Type
Electronic communicating, color display touch screen, 7−day program-
mable.
Supports
Humidification Measurement and Control,
Dew Point Adjustment Control,
Dehumidification Measurement and Control,
Humiditrol®Enhanced Dehumidification Accessory (EDA),
Multi-stage HVAC Systems,
Equipment Maintenance Reminders.
On-board Help Screens.
The icomfortthermostat’s autochangeover mode permits control of
heating, cooling, humidification, and dehumidification without user in-
volvement.
Outdoor Temperature Sensor
Communicatingoutdoor units contain a built in outdoor temperature sen-
sor.
Installing icomforttthermostat
Refer to the Quick Start Guide for all the information about installing the
thermostat to a wall and for wiring diagrams for connecting the thermo-
stat to the system using one of a number of possible configurations.
(Wiring diagrams are also shown beginning on Page 36.)
After all the wiring is in place, apply power to the system. 24VAC will be-
gin to power up the thermostat.
Continue with the Installer setup that follows.

506052−01 11/09 Page 6
Installer setup − Page 1 of 8
After power is applied to the thermostat for the first time, the processor
checks the system for installed communicating devices, the System
discovery" screen (figure 2) is displayed on the thermostat; followed by
the Use this thermostat" screen (figure 3). Press press here to contin-
ue.
SYSTEM DISCOVERY IN PROGRESS
Figure 2. System discovery
tests
Thermostat 1
Use this Thermostat?
press here
setup HELP
Figure 3. Use this thermostat screen
During the setup process, alerts may pop open to inform the installer
some item of information that affects the setup (figure 4). Tend to any
such alerts prior to continuing setup.
Active
Critical Alert Code: 31
AIR HANDLER reports:
Lost Communication with
THERMOSTAT −
Latest occurrence: 8/23/09
1:57 PM
press for more
critical alert
close
Figure 4. Alert window

icomfortTouch Screen 7−Day Programmable Thermostat
Page 7
Installer setup − Page 2 of 8
System settings (figure 5) 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: (35% ) shows the current setting of
the Circulate Fan ON time.
edit
next step
back
setup HELP
Time and Date
Daylight Saving
Time
Circulate Fan ON
time
Dealer Name
Dealer Address
Dealer Phone
Number
Dealer Email
To view/edit a setting,
highlight it, then press edit.
Current Value:
(35%)
system settings
Figure 5. System settings
The following shows the range/condition and defaults for the settings.
system setting range/condition default use
Time and Date see Page 8
Daylight Saving Time Enabled/Disabled Enabled
Circulate Fan ON Time 15 to 45 35%
Dealer Name
(alpha−numeric
characters)
Lennox

1−800−9−LENNOX

www.lennox.com
use type
writer to
change
Dealer Address
Dealer Phone Number
Dealer Email
Dealer Website
If you want to modify a setting, use one of the tools shown in figure 6.
(Make time and date as described on Page 8.) 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.
up/down arrows
scroll through a
numeric range for
some settings
save
cancel
Daylight Saving Time
Enabled
Disabled
typewriter tool to input
names, address, phone
numbers etc.
*=
r
Lennox Repairman
Dealer Name
21
qwe
43658709
ityu po
f
@!
asd
$#^%(&)
kghj l
v
−
zxc
_/ +.
bnm
space back
space
symbols CAPS
ON
save
cancel
Figure 6. Settings change tools

506052−01 11/09 Page 8
Installer setup − Page 3 of 8
Setting time and date
Use the arrows to select Time and Date; press edit (see figure 7). Press
next to proceed to the Set current time and date" screen (figure 8).
tests
setup HELP
system settings to adjust a setting, highlight
it, then press edit.
Current Value:
(September 15, 2009,
09:23 AM)
edit
next step
back
Time and Date
Daylight Saving
Time
Circulate Fan ON
time
Dealer Name
Dealer Address
Dealer Phone
Number
Dealer Email
Figure 7. View/edit time and date
When the Time and Date" screen appears, enter the correct date as fol-
lows:
Press one of the time and date boxes − the text will change to white
type in a dark box (for example, press the 10" box in figure 8).
Press the up/down arrows to change the data.
Press other boxes and adjust with the arrows for all time and date
information. When the date and time is correct, press save to save
settings and return to previous settings screen.
adjust
Time and Date
10 :19 AM
Oct 15 2009
save
cancel
setup HELP
Figure 8. Set current time and date
NOTE − After setting the time and date, if you don’t need to add any non−
communicating devices, you may wish to accept the default system pa-
rameters and skip forward to tests". To do so, repeatedly press next
step on each screen until you get to the tests screen. From there, you
can check the systems operation. Thereafter, should you need to
change a communicating device parameter, access those settings by
pressing the equipment tab in the installer section.

icomfortTouch Screen 7−Day Programmable Thermostat
Page 9
Installer setup − Page 4 of 8
Add/remove/modify non−communicating devices
From this screen (figure 9), use the yes button to access a list of non−
communicatingdevices for installing or removing. A list similar to that
shown in figure 10 will appear.
setup HELP
yes
next stepback
Add or Remove
Non−communicating
equipment?
HP
XP19−060−230−06
5809K00015
AIR HANDLER
CBX32MV−60
5809K00020
THERMOSTAT
49W95
A109K00139
SYSTEM
system devices
Figure 9. Add/remove/modify non−communicating devices
Humidification / Dehumidification Control Modes depend on a hu-
midifier and/or dehumidifier being added to the system. Therefore, you
must press yes on the button near "Add or Remove Non−communicating
equipment?" Also, in order for the user’s display to show these controls,
the system controls must be set. See Page 12 for more information.
Use the up/down arrows (see figure 10) to select a setting. The right hand
side of the screen indicates what is currently selected, for example, Cur-
rent Value: (Not Installed); press edit if you want to modify that setting.
setup HELP
edit
back
non−communicating
device list
HUMIDIFIER
DEHUMIDIFIER
UV LIGHT
to adjust a setting, highlight it,
then press edit
Current Value:
(Not Installed)
Figure 10. Installing UV Light
A typical Installed status screen (Figure 11) shows if the device is not
installed or type of equipment installed. Use the arrows to change and
use save to save the change. (Cancel goes pack to previous screen.)
Installed Status
save
cancel
Not Installed
UV LIGHT
Figure 11. Typical non−communicating device edit screen

506052−01 11/09 Page 10
Installer setup − Page 5 of 8
Modify communicating device settings
Use this screen (figure 12) to access communicating devices’ settings.
Use back to return to the previous screen or next step to go on.
HP
XP19−060−230−06
5809K00015
AIR HANDLER
CBX32MV−60
5809K00020
THERMOSTAT
49W95
A109K00139
SYSTEM
setup HELP
about
next step
back
system devices
edit
reset ALL
to adjust a device, highlight
it, then press edit
Figure 12. Accessing communicating device settings
With one of the devices highlighted, press about, then use arrow keys to
see a list of data about the selected device. If you select reset ALL, and
then confirm, ALL devices will be reset to their factory settings. (You
would see a screen similar to figure 14.)
With one of the devices in figure 12 highlighted, press edit to go to that
device’s list of settings (see figure 13).
Use the up/down arrows to scroll through the device’s settings and ob-
serve the right hand side of the screen (figure 13) to see the current set-
ting, for example, Current Value: (Off). Press edit if you want to modify
that setting, or press back to return to the previous screen.
Equipment Name
Compressor Short
Cycle Delay
Defrost
Termination Temp
Compressor Shift
Delay On/Off
setup HELP
back
HP
edit reset
to adjust a setting, highlight it,
then press edit
Current Value:
(Off)
Figure 13. Modify communicating device settings
Settings available for the devices are dependant on the components you
have. Shown below is an example of changing the compressor shift
delay on. After using the arrows to select On, press save to save the
changes and return to the previous screen.
save
cancel
On
Off
Compressor Shift Delay On/Off