Lennox P506052-01, 2P1109 User Manual
2009 Lennox Industries Inc.
Dallas, Texas, USA
INSTALLER’S SYSTEM SETUP
GUIDE
icomfortt Thermostat
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.
*2P1109* *P506052-01*
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 electrical 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 voltages 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 thermostat and void the warranty.
IMPORTANT
Read this manual before programming this thermostat.
Use this thermostat only as described in this manual.
506052−01 11/09
Page 2
icomfortt Thermostat 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 transmission 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 safety monitors in the unit.
Discharge Air Sensor (DAS): Communicating discharge air sensor.
Provides discharge air temperature to Bus, UI, and IFC for proper operation 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
Page 3
icomfort Touch Screen 7−Day Programmable Thermostat
icomfortt Technical Description
The 24VAC icomfort thermostat stores system parameters and settings 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 heating 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
R I+ I − C
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
Figure 1. icomfort thermostat system
Maximum total length
of all connections on
the RSBus is limited
to 1500ft.
506052−01 11/09
Page 4
icomfortt Thermostat Features
Thermostat Type
Electronic communicating, color display touch screen, 7−day programmable.
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 involvement.
Outdoor Temperature Sensor
Communicating outdoor units contain a built in outdoor temperature sensor.
Installing icomfortt thermostat
Refer to the Quick Start Guide for all the information about installing the
thermostat to a wall and for wiring diagrams for connecting the thermostat 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 begin to power up the thermostat.
Continue with the Installer setup that follows.
Page 5
icomfort Touch Screen 7−Day Programmable Thermostat
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 continue.
SYSTEM DISCOVERY IN PROGRESS
Figure 2. System discovery
setup HELP
tests
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.
critical alert
Active
Critical Alert Code: 31
AIR HANDLER reports:
Lost Communication with
THERMOSTAT −
Latest occurrence: 8/23/09
1:57 PM
press for more
close
506052−01 11/09
Thermostat 1
Use this Thermostat?
press here
Figure 3. Use this thermostat screen
Figure 4. Alert window
Page 6
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.
setup HELP
system settings
Time and Date
Daylight Saving
Time
To view/edit a setting,
highlight it, then press edit.
Current Value:
(35%)
Circulate Fan ON
time
edit
Dealer Name
Dealer Address
Dealer Phone
Number
back
next step
Dealer Email
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
Dealer Address
Dealer Phone Number
Dealer Email
Dealer Website
(alpha−numeric
characters)
Lennox
1−800−9−LENNOX
www.lennox.com
use type
writer to
change
Installer setup − Page 2 of 8
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
typewriter tool to input
names, address, phone
numbers etc.
Lennox Repairman
21
qwe
@!
asd
−
*
zxc
symbols
CAPS
ON
Figure 6. Settings change tools
Daylight Saving Time
Enabled
Disabled
Dealer Name
43658709
r
ityu po
$#^%(&)
f
_
v
+
=
bnm
space
/
kghj l
.
back
space
cancel
save
cancel
save
Page 7
icomfort Touch Screen 7−Day Programmable Thermostat
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).
setup HELP
system settings
Time and Date
Daylight Saving
Time
Circulate Fan ON
time
Dealer Name
Dealer Address
Dealer Phone
Number
Dealer Email
tests
to adjust a setting, highlight
it, then press edit.
Current Value:
(September 15, 2009,
09:23 AM)
edit
back
next step
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.
setup HELP
Time and Date
10 :19 AM
adjust
Oct 15 2009
cancel
save
Figure 7. View/edit time and date
When the Time and Date" screen appears, enter the correct date as follows:
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.
506052−01 11/09
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 parameters 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.
Page 8
Add/remove/modify non−communicating devices
From this screen (figure 9), use the yes button to access a list of non−
communicating devices for installing or removing. A list similar to that
shown in figure 10 will appear.
setup HELP
system devices
HP
XP19−060−230−06
5809K00015
AIR HANDLER
CBX32MV−60
5809K00020
THERMOSTAT
49W95
A109K00139
SYSTEM
Add or Remove
Non−communicating
equipment?
yes
next stepback
Figure 9. Add/remove/modify non−communicating devices
Humidification / Dehumidification Control Modes depend on a humidifier 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.
Installer setup − Page 4 of 8
setup HELP
non−communicating
device list
HUMIDIFIER
DEHUMIDIFIER
UV LIGHT
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
Not Installed
UV LIGHT
Figure 11. Typical non−communicating device edit screen
to adjust a setting, highlight it,
then press edit
Current Value:
(Not Installed)
edit
back
cancel
save
Page 9
icomfort Touch Screen 7−Day Programmable Thermostat
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.
setup HELP
system devices
HP
XP19−060−230−06
5809K00015
AIR HANDLER
CBX32MV−60
5809K00020
THERMOSTAT
49W95
A109K00139
SYSTEM
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 observe the right hand side of the screen (figure 13) to see the current setting, for example, Current Value: (Off). Press edit if you want to modify
that setting, or press back to return to the previous screen.
506052−01 11/09
to adjust a device, highlight
it, then press edit
edit
reset ALL
back
next step
about
setup HELP
HP
Equipment Name
Compressor Short
Cycle Delay
Defrost
Termination Temp
Compressor Shift
Delay On/Off
to adjust a setting, highlight it,
then press edit
Current Value:
(Off)
edit
back
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.
Compressor Shift Delay On/Off
On
Off
Page 10
cancel
save
reset
If you select reset and then confirm, the highlighted device will be reset
to its factory setting. You would see a screen similar to figure 14, but referencing only the selected device.
Resetting ALL devices to their factory default
settings will cause the system to restart the
setup process. If you want to continue, then
press ’confirm’ or press ’cancel’.
confirm
cancel
Installer setup − Page 6 of 8
After a reset, the device which had its settings reset to
default will display in the system devices screen in red
type. You will be required to highlight the red−type device(s) and use edit (see figure 12) to change, or at
least view the changed settings of the red−type devices .
In the edit mode, the feature list will show the selected
device’s changed features in red type. Use the up/
down arrows to select each red−typed feature and
press edit. Make changes to the settings using the
Edit tools if desired, or at least, press save in each fea-
ture screen. Upon saving, the previous screen will
display and the type will again be black. Press back to
return the Modify communicating device settings
screen.
HP
XP19−060−230−06
5809K00015
AIR HANDLER
CBX32MV−60
5809K00020
Equipment
Name
Electric Heating
Airflow
Low Cooling
Airflow
Low Cooling
Airflow
Figure 14. Reset device confirmation note
At this point press next step to advance to the test controls.
Page 11
icomfort Touch Screen 7−Day Programmable Thermostat
Installer setup − Page 7 of 8
Indoor air quality controls
An example of installing UV Light is shown in figure 10, Page 9.
To turn on humidification or dehumidification controls, in addition to
the setup described on Page 9, work from either the setup tab or the
equipment tab to get to the adjustment screen (figure 15). Use the arrows
to highlight the SYSTEM selection. Press edit.
A long list of features are listed on the right of the next screen (see figure
16). Use the arrows to locate Humidification Control Mode and/or De-
humidification Control Mode. Press edit.
Depending on the type of equipment installed, the lists of options may be
different than those shown in figure 17. In order for either or both of these
controls to display, the selected option must be other than Display
Only".
setup tests equipment HELP
system devices
XP19−060−230−06
5809K00015
AIR HANDLER
CBX32MV−60
5809K00020
THERMOSTAT
49W95
A109K00139
SYSTEM
49W95
A109K00139
(to adjust a device, highlight
it, then press edit)
edit
back
Figure 15. Accessing the SYSTEM adjustment screen
about
reset ALL
next step
506052−01 11/09
Page 12
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