Lennox 11U61 Operating and safety instructions

201Lennox Industries Inc.
Dallas, Texas, USA
THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER
FOR FUTURE REFERENCE
NOTICE
Read this manual before programming this thermostat.
Use this thermostat only as described in this manual.
WARNING
Improper installation, adjustment, alteration, service or maintenance
can cause property damage, personal injury or loss of life.
Installation and service must be performed by a licensed professional
HVAC installer (or equivalent) or service agency.
INSTALLER'S SYSTEM SETUP
GUIDE
iComfort Wi-Fi®Flex
Touchscreen Programmable Thermostat (11U61)
CONTROLS
Shipping and Packing List
Thermostat container includes:
1 - Thermostat
4 - Wall anchors
1 - Homeowner's manual
4 - Mounting screws
Equipment Interface container includes:
1 - Equipment Interface Module
1 - Equipment Interface Module Installation Instruction
1 - Warranty card

507428-01 2
TABLE OF CONTENTS
Overview - Technical Description and Features 2................
Installation and set up 3.....................................
Adjusting System Settings 4..................................
Connecting to Home Wi-Fi Router 6...........................
Troubleshooting Wi-Fi Connection 9...........................
Account Registration 14......................................
Firmware Update 15.........................................
Adding Conventional Outdoor Unit and Accessories 15............
Outdoor Unit (Air Conditioner or Heat Pump) 15...................
Bypass (24VAC) Humidifier 15..................................
Auxiliary Dehumidifier 16......................................
Adjusting Humidification and Dehumidification Settings with
Conventional Outdoor Units 17................................
Using the Tests / Diagnostics Features 20.......................
Using the Secure Web Portal 22...............................
Skins 22...................................................
Screen-Saver 22............................................
Accessing Installer Screens and Changing
Equipment Parameters 24....................................
Wiring Diagrams 26..........................................
Overview - Technical Description and Features
The iComfort Wi‐Fi®Flex Thermostat is a 24VAC, color
display touchscreen and 7-day programmable
thermostat. It stores system parameters and settings in
non-volatile memory (i.e., it retains data when electrical
power fails or is turned off).
The iComfort Wi‐Fi®Flex thermostat can connect to
online services via the Internet through the homeowner's
Wi-Fi access point. After online registration is
completed, the system may then be accessed by the
homeowner from anywhere using a remote Internet
connection via computer, smartphone or other personal
Internet-connected devices.
WARNING
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
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7-Day Programmable iComfort Wi‐Fi®Flex Thermostat
3
This thermostat supports:
 Wireless bands 802.11b, 802.11g and 802.11n
 Three languages (English, French, Spanish)
 Air conditioning 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 and 2 stages of emergency heating)
 Variable-capacity / multiple-stage heat / cool and
universal compatibility (gas/electric/heat pump/air
conditioner).
 Dual-fuel capable with two balance points.
 Indoor air quality with time‐based notification of
consumables including media filters, UVC bulbs,
humidifier pads and PureAir system catalyst
service / replacement,
 Humidification measurement and control.
 Dew point adjustment control
 Equipment maintenance reminders
 Autochangeover mode -- Permits control of heating,
cooling, humidification, and dehumidification without
user involvement
Installation and Setup
During initial thermostat start-up the following screen will
appear (see figure 1). This indicates that the thermostat
is active and booting up.
...
Figure 1. Boot-Up Screen
COMMUNICATION ERROR SCREEN
During initial thermostat start-up if the following screen
appears (see figure 2), this will indicate that the
thermostat has been incorrectly wired or has shorted

507428-01 4
wires. Turn power off to the system and verify that all
wiring is correct.
Figure 2. Communication Error Screen
Adjusting System Setting
SET TIME AND DATE
Use the arrows to select Time and Date; touch edit to
proceed to the “Set current time and date” screen.
When “Time and Date” screen appears, enter the correct
date as follows:
 Use the left and right arrows to change the month
and year.
 Touch a day of the month to select it.
 Touch on the hour or minute; up down arrows appear
to allow change.
 Touch the am/pm field to toggle it between am and
pm.
 When the correct date and time is set, touch save to
save settings and return to previous settings screen.
Touch next to continue to next screen.
CIRCULATE FAN ON TIME SETTING
“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 settings
approximate how long the fan will run at these typical
settings:
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).
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 air
circulation.
DEALER NUMBER
Either the dealer number or phone number is required.
Once either number is entered, all other fields will
automatically be populated once the thermostat has
been registered during the Wi-FI set up procedure later
on in this instruction (if the dealer has an account with
Lennox already).

7-Day Programmable iComfort Wi‐Fi®Flex Thermostat
5
NOTE - Dealer number is the dealer's Lennox account
number. Dealer phone number is the dealer's main office
phone number.
1. Use the arrows to scroll down to the Dealer Number
or Dealer Phone setting. Press the edit button.
2. Enter the Dealer Number or Dealer Phone
Number using the on-screen keyboard. Press save
to continue.
NOTE: If a Dealer Number or Dealer Phone Number is
not entered and the next button is selected, a pop-up
warning screen will appear.
3. Press yes to continue to the System Devices
screen. Press no to return to the system settings
screen.
WARNING
Are you sure you want to proceed?
Please enter your DEALER PHONE NUMBER or DEALER NUMBER
If you do not enter either, the thermostat will not show up on
DaveNet and you will not be able to remotely monitor the system
status or receive email alerts when there is a problem.
no
yes
WARNING
The dealer number is your Lennox account number) i.e
A12345). Your dealer phone number should be the main office
phone number associated with your dealership. If you have any
questions, please contact your Lennox representative.
Are you sure you want to proceed?
Figure 3. Dealer Number Warning
The following table lists all of the installer configurable
system level parameters available from the installer set
up screens. After adjusting system settings, select next
to continue.
Table 1. System Settings
Parameter
Name Default Parameter Value Setting Increment
Time and
Date —(Time/date elements screen) —
Daylight
Saving Time Enabled Enabled, Disabled —
Circulate Fan
ON Time 35% Range 15 to 45% 1%
Temperature
Unit Fahrenheit Fahrenheit or Celsius —
System Name —(keyboard input
screen) —
Dealer
Number ****
(keyboard input
screen)
Note: When adding
the dealer number,
all other dealer
fields will auto pop
ulate once thermo
stat registration is
completed.
—
Dealer Name Lennox —
Dealer
Address — —
Dealer Phone 1-800-9-LEN
NOX —
Dealer Email — —
Dealer
Website
www.lennox.
com —

507428-01 6
Connecting to a Home Wi-Fi Router
Check the router utility program or contact service
provider for help. When determining the location for the
Wi-Fi thermostat, be sure it is in an area near enough to
the home Wi-Fi router to ensure good communications
signal strength between the thermostat and the Wi-Fi
router. (Hint: Use a smart phone with Wi-Fi and Wi-Fi
finder application to locate and determine optimal
location based on router Wi-Fi signal strength.)
NOTE - Thermostat will not be able to reliably connect to
a router if the received signal strength indicator (RSSI) is
-70 or greater.
NOTE - Correct the cause of any alerts prior to
continuing set up. Secure Connection Recommended!
Verify the home Wi-Fi router supports at least one of the
supports wireless bands (802.11b, g or n). Check router
utility program or contact service provider for assistance.
ENABLING WI-FI
To enable the Wi-Fi feature to communicate with a
wireless router
1. Press and release Wi-Fi in the lower left corner of
the HOME screen
indoor temperature
indoor humidity is 41%
fan is
OFF
9:39 am Aug 15, 2012
fan is
AUTO
cool-to
set temp
75
Heat-to
72
heat
or
cool
fan is
AUTO
enter
away
outdoor
temperature
80
system is cooling
Wi-Fi ?
1
Wi-Fi
Figure 4. Press Wi-FI
2. Press the Wi-Fi disable button to enable Wi-Fi.
WI-FIL SETTINGS
Press to enable /
disable Wi-FI
disabled
Thermostat is not connected to the Wi-FI network
WI-FI
X
Figure 5. Enable Wi-FI

7-Day Programmable iComfort Wi‐Fi®Flex Thermostat
7
3. The User Agreement screens will appear next.
Press next as many times as necessary; then press
accept after reading the User Agreement.
ESTABLISHING A WI-FI CONNECTION
There are two methods to set up your Wi-Fi connection.
Select either NETWORK SETTINGS or connection
status.
Method 1 — Network Settings Method
1. Press NETWORK SETTINGS; this screen shows a
graphical view of buttons representing OPEN and
SECURE Wi-Fi networks and a button for adding a
network.
WI-FI SETTINGS
press to enable /
disable Wi-FI
enabled
Thermostat is not connected to the Wi-FI network
WI-FI
X
NETWORK
SETTINGS
press to change
network settings
Must setup a network connection before registering thermostat
connection
status
Press to see
connection status
Figure 6. Enable Wi-FI
Open connection which which requires no
password.
Secure connection which requires Wi-Fi
password (security key).
Add a network is required when Wi-Fi
identification (SSID) is being hidden (not
broadcasting). You will need to know the Wi-Fi
network name (SSID), security encryption type
(if enabled), and security password (if security
encryption is enabled).
2. When selecting a:
unsecured connection a screen will appear with
two options, connect and router info. Press
connect to continue.
secured connection a screen will appear
requesting the Wi-Fi network password
(security key). There are two options to select
from which are connect and router info. Using
the on-screen keyboard, enter the password
(security key) and then press connect to
continue.
HOME
DS9A
Open connection (no password required)
Secure connection (password required)
(lock icon is present)
Figure 7. Typical Connection Type and Signal
Strength

507428-01 8
NOTE - The router info button provides information
concerning the home Wi-fi connection (i.e, RSSI, IP
address, MAC address and wait state) all of which may
be helpful in troubleshooting network connection
issues).
3. If connection is successful the screen will return to
the available networks screens. Press AP3 as
exampled in figure 8 to return to the previous screen.
If the connection was successful it will be listed
connected as exampled below.
WI-FI SETTINGS
press to enable //
disable Wi-FI
9:39 am Aug 15, 2012
enabled
WI-FI
?
X
AP3
connected
press to change
wireless network
Must setup a network connection before registering thermostat
Wi-Fi
connection
status
Press to see
connection status
thermostat
not
registered
press to change
thermostat
registration
Figure 8. Network Connected
ESTABLISHING A WI-FI CONNECTION TO A
HIDDEN NETWORK
1. When connecting to a hidden network, press the
add new network icon to continue. Enter the
network name (SSID). If security encryption is
enabled, then press the security is none icon.
Select either WEP, WPA or WPA2.
2. Using the on-screen keyboard, enter the password
(security key). If the network name or security key
combination is incorrect or incorrectly type, and
access to the specified network failed, a message
will alert you to retry.
3. If connection is successful the screen will return to
the available networks screens. The network
successfully connected will be listed and shown as
connected as exampled in figure 8.
Method 2 — Connection Status Method
1. Press connection status; this screen shows a
graphical view of the current connection status.
2. Select the router icon to choose the desire W-Fi
network. When selecting a:
unsecured connection a screen will appear with
two options, connect and Router Info. Press
connect to continue.
secured connection a screen will appear
requesting the Wi-Fi network password
(security key). There are two options to select
from which are connect and router info. Using
the on-screen keyboard, enter the password

7-Day Programmable iComfort Wi‐Fi®Flex Thermostat
9
(security key) and then press connect to
continue.
3. If connection is successful the screen will return to
the available networks screens. Press Xto return to
the previous screen. If the connection was
successful it will be listed connected as exampled
below.
WI-FI SETTINGS
press to enable //
disable Wi-FI
9:39 am Aug 15, 2012
enabled
WI-FI
?
X
xxxx
connected
press to change
wireless network
Must setup a network connection before registering thermostat
Wi-Fi
connection
status
Press to see
connection status
thermostat
not
registered
press to change
thermostat
registration
Figure 9. Network Connected
4. Select Xto return to the WI-FI SETTINGS screen.
Select connection status again to verify that
connection to the router and Internet is active. Both
the router and internet icons will have green
backgrounds if connections are successful.
5. Skip the next section if connection to the home Wi-Fi
router, Internet and server were successful.
Troubleshooting Wi-Fi Connection
ROUTER / MODEM CHECK IF CONNECTION FAILS
1. Make sure the router and modem are turned on.
2. Check for connections to other wireless devices and
internet connection.
3. Make sure the thermostat's Wi-Fi is enabled and
connected to the home network (Router).
4. If having difficulty connecting to the router, online
research the router model number and/or internet
provider to discover and verify that the router band
is set to B, G or N bands. You will need to access the
routers utility program to make any changes. If not
accessible please contact your service provider for
help. The thermostat will connect to B, G or N band
routers at this time. NOTE: When set to B or G
bands, video streaming will likely be slower that N
band. If homeowner has implemented a dedicated N
band router for the purpose of video streaming, a
separate router for the thermostat may be required.
5. Reboot your router
A Unplug your power cord, wait 30 seconds, then
reconnect. If you have multiple routers, try
rebooting all of them when problems occur.
B If their are multiple routers you must have
different name and password for each one.

507428-01 10
C On your computer, turning Wi-Fi off and then
back on will force the system to rescan for
available networks. Do you see the network your
thermostat is trying to connect to?
6. Power cycle the thermostat.
7. Keep cordless phones, microwaves and other
electrical equipment at least 3.5 feet (1m) away from
access point.
A Try moving your router closer to the device if
possible. If connection is improved, then there is
probably some interference. Must have signal
stronger than -70db (also, see Router Signal
Strength on page 3); anything less will have
signal losses or not connect at all.
B Adjust the direction of the router toward the
thermostat. Adjust the routers antenna. A signal
repeater may be needed.
8. Try changing channels on the access point and test
it out with one of your internet devices (i.e. laptop,
desktop). The IP address to the server from the stat
will be close to the same IP address from the
computer to the server (www.mycomfortsync.com).
COMPUTER CONNECTIONS:
A On Access Point, Login to configuration (usually
web based interface) > go to Wireless Settings
and select a different channel > Save settings.
B Devices cannot change Wi-Fi channel. It is set
only at the router.
C On the thermostat, disable, then re-enable the
Wi-Fi connection.
9. Antenna in thermostat is fixed and cannot be moved.
Location of your access point with respect to the
thermostat is very important.
10. Baby monitors, garage door openers and wireless
video cameras may create signal interference.
11. Check your encryption key (Password).
12. Double check and re-enter your WEP/WPA
encryption keys / pass-phrases (usually found on
the router). If set to WEP security, change to WPA
if allowed.
13. In your thermostat's wireless settings, verify that
your encryption key (password) is correct. There can
not be spaces at the end of the SSID or Password.
14. It is important to note that number of walls that the
signal must pass thru to reach the thermostat can be
an issue. (e.g. 4 indoor walls, or 1 outdoor wall + 2
indoor walls could mean a weak signal at the
thermostat).
15. The addition of a signal repeater or extender maybe
an option. (Desktop or wall outlet plug-in devices are
available online or at your local electronics stores in
price range $70 - $150).
16. If multiple routers are in the home make sure each
router has a different name.

7-Day Programmable iComfort Wi‐Fi®Flex Thermostat
11
17. If you don't get the pop up box that says the
registration request has been forwarded, then the
email was not sent to the server and the return
registration link will not be sent to your email
address. Try all the router troubleshooting
procedures and if you still can't get it to send the
email, cycle the power to the thermostat. This will
cause the thermostat to ask for the Lennox server
mac address again and try to resend the email.
18. If all is correct, refer user to their Router
manufacturer and Network provider. Router may
have incoming fire wall check with service provider.
ROUTER SIGNAL STRENGTH
After connecting to your router, you can check your
signal strength by pushing the Wi-Fi icon on the home
screen, then the networks button, then your network
button, then the router info button (see figure 10).
A strong wireless signal (RSSI) is indicated by a
NEGATIVE decibel number in the range from -46 to
-58db; anything greater than -70db will not connect.
If you are connected but have a signal above -70db then
you may consider adding a signal repeater/extender or
making some of the other router adjustment mentioned
in the Router / Modem Check section
router Info
connect Push router info
button
Figure 10. Access connection data
AT+NSTAT=?
MAC=00:ID:C9:A0:40:95
WSTATE=CONNECTED MODE=AP
BSSID=98:FC:11:47:B9:00 SSID= LINKSYS” CHANNEL=6 SECURITY=NONE
RSSI=-78
IP ADDR=192.168.8.117 SUBNET=255.255.255.0 GATEWAY=192.168.8.1
DNSI=192.168.1.1 DNS2=0.0.0.0
RXCOUNT=14 TXCOUNT=345
OK
Figure 11. Connection Data

507428-01 12
Registering the Thermostat
REGISTRATION FOR ONLINE ACCESS
1. From the WI-FI SETTINGS screen, press either the
thermostat not registered icon or the connection
status icon and select the server icon.
WI-FI SETTINGS
connection
status
thermostat
not
registered
AP3
connected
press to change
network settings
press to enable /
disable Wi-Fi press to change
thermostat
registration
press to toggle
off / auto
Wi-Fi
enabled
2. Enter homeowner email address and system
description and press the register button.
register
enter your email
Register with iComfort Wi-Fi thermostat to enable remote access and
online weather information
System Desc
3. A pop-up screen will appear asking if the email
address below is correct? Verify the email address
is correct and press yes.
4. Another pop-up screen will appear notifying the user
to check their email.
An email has been sent to
[email protected]
with instructions on how to register your thermostat. If you haven't
received the email, please check your spam folder and make sure
that your email address is correct.
NOTE - If the email address originally entered is
incorrect, return to the thermostat registered screen
and reenter the correct information and press register.
5. After the iComfort Wi‐Fi®server sends the email
with the network link, registration and account
creation must be completed from the homeowner's
personal computer.

7-Day Programmable iComfort Wi‐Fi®Flex Thermostat
13
NOTE - Time from pushing the registration button on the
thermostat and receiving the consumer portal register
link from your email on your computer is normally from 5
to 15 minutes depending on Internet speed and traffic.
6. After registration has been completed, press the
connection status icon to verify the connection was
successful. If the connection is successful the server
icon background will be green.
7. After successful connection to the server is
completed, the firmware update button will appear.
The default setting is set to auto. If any firmware
updates are available they will immediately start
downloading and update the thermostat. The
thermostat will reboot itself after the update is
completed. Updates are done in the background and
will not impair normal thermostat operations.
This auto update feature can be disabled by
pressing the firmware update button to toggle to
OFF but is not recommended.
NOTE - Firmware updates will not affect installer or user
thermostat settings. Both will be retained after the
update.
WI-FI SETTINGS
connected
Wi-Fi
enabled
thermostat
registered
Connection to server has not bee established or it has been lost.
Please wait until a connection is established.
firmware
update
auto
press to enable /
disable Wi-Fi
press to change
wireless network
press to change
thermostat
registration
press to search
for new update
NOTE -
If any downloads are available for the thermostat they will start down
loading right away. When new firmware is being downloaded or when
Gelaskins are being installed, the thermostat screen will temporarily go
blank and running units may cease operation while the system is being
reset to accommodate the new changes. This is normal and can last
a couple minutes.
AP3
connection
status
press to see
connection status
Figure 12. Registration for Online Access

507428-01 14
User Account Registration for Lennox Server
Access
Figure 13. Registration Screen
NOTE - This following information is customer set
up instructions and is shown here to allow the
installer to help walk the customer through the set
up process.
After registering through your iComfort Wi‐Fi®Flex
thermostat interface, go to the homeowner's computer
and locate the email sent from the server.
NOTE - if the customer has already set up an
account, click the “Click Here” button to access that
account.
Click on the Register link; the screen (to the left) will
appear. Fill in the User Name and Password fields and
check the agree to terms and conditions box. Click
Create User button.
A series of pages and prompts follows to provide
guidance through profile set up and user preference
definitions.
USER NAME REQUIREMENT
The following are the minimum user name requirements:
 User name must begin with a letter.
 User name has a minimum of four and a maximum
of 37 characters.
 User name is not case sensitive.
 User name cannot be a email address
 User name must be unique. If user name used is
already in use, a message indicating so will appear.
PASSWORD REQUIREMENT
The following are the password requirements:
 Upper and lower case combinations are allowed.
 At least one number must be used.
 Minimum of six characters.

7-Day Programmable iComfort Wi‐Fi®Flex Thermostat
15
Firmware Update
FIRMWARE UPDATE BUTTON
1. Firmware Update (Off) – No automatic firmware
updates (highly recommend leaving ON)
2. If the status is changed from Off to Auto, it will trigger
an immediate check and update for the firmware
update. This can take up to 1 hour to complete
depending on the user's internet speed, signal
strength, internet traffic, etc.
3. Changing from Auto to Off during a download will
NOT stop the current download if it is already in
process.
4. Firmware Update (Auto) – (Default state). If
enabled, the thermostat checks for firmware update
a few minutes after commissioning and then every
24 hours in early morning hours.
5. Once a download is completed, the thermostat stops
all activity for up to 3 seconds, restarts for 5 seconds,
then continues with normal operation. All prior
system and user settings are retained (Equipment,
programs, Wi-Fi settings, etc.). Note a variation in
indoor temperature may be observed after restart.
This is normal operation of the thermostat while the
temperature sensor algorithms adjust after a restart
of the system.
Adding Outdoor Unit and Accessories
OUTDOOR UNIT (AIR CONDITIONER OR HEAT
PUMP)
To add (or remove) an outdoor unit, you must be at the
“Add or Remove Non-communicating equipment?”
screen.
1. Touch the yes button next to Add or Remove
Non-communicating equipment?.
2. In the “non-communicating device list” screen, use
the arrows to highlight Outdoor Unit Type and
touch edit.
3. Touch one of the radio buttons to select a 1-or
2-stage air conditioner unit or a 1-or 2-stage heat
pump unit; touch save.
4. Use arrows to highlight any red colored text in the
device list (e.g. select Outdoor Unit Capacity;
text turns white). Touch edit.
5. Use either the up or down arrows to display the
correct size outdoor unit. Touch save to continue.
NOTE - If the defaults are correct, you do not have to
make any changes, but you must touch save. When all
red text is gone, the back button will appear; touch it to
return to the “Add or Remove Non-communicating
equipment?” screen.
HUMIDIFIER
Before adding a humidifier, be sure that the:

507428-01 16
 Humidifier is wired to the equipment interface
module and furnace or air handler control,
 Entire system is wired, powered up and you are at
the “Add or Remove Non-communicating
equipment?” screen.
To add a humidifier:
1. Touch the yes button on this screen.
2. In the “non-communicating device list” screen, use
the arrows to highlight Humidifier (note the current
value, Not Installed) and touch edit.
3. Touch one of the radio buttons to select the type of
humidifier (or select Not Installed, if removing
humidifier); touch save.
4. The previous screen returns, but the current value
now shows your selection. Touch the back button.
5. The “Add or Remove...” screen reappears with your
addition shown in the system devices list. At this
point, you may add more equipment (touch yes) or
if finished, touch the next button to advance to the
“Adjust a setting...” screen (see page 17).
NOTE - Adding humidity regulating non-communicating
devices may be a 2-step procedure:
First the device must be installed and wired. After
the humidifier is installed, the setting under the
"System" mode "Humidification Control Mode"
defaults to "Basic".
Second, if you want another mode, i.e. Precision,
Basic Dew Point, or Precision Dew Point, the device
requires further configuration (see page 17).
AUXILIARY DEHUMIDIFIER
Before adding a dehumidifier, be sure that:
 the dehumidifier is wired to the equipment interface
model and furnace or air handler control.
 the entire system is wired, powered up and you are
at the “Add or Remove Non-communicating
equipment?” screen.
To add (or remove) a dehumidifier, you must be at the
“Add or Remove Non-communicating equipment?”
screen.
1. Touch the yes button on this screen.
2. In the “non-communicating device list” screen, use
the arrows to highlight Dehumidifier and touch edit.
Note the current value (e.g. Not Installed).
3. Touch one of the radio buttons to select the type of
dehumidifier (or select Not Installed, if removing
dehumidifier); touch save.
4. When you scroll to the Dehumidifier device, (Note
the current value, e.g. auxiliary dehumidifier.) Click
back to return to the “Add or Remove...” screen.

7-Day Programmable iComfort Wi‐Fi®Flex Thermostat
17
5. The “Add or Remove...” screen reappears with your
addition shown in the system devices list. At this
point, you may add more equipment (touch yes) or
if finished, touch the next button to advance to the
“Adjust a setting...” screen.
NOTE - The device must be installed and wired. After the
dehumidifier is installed, the setting under the "System"
mode "Dehumidification Control Mode" defaults to
"Basic".
Adjusting Humidification and Dehumidification
Settings with Outdoor Units
HUMIDIFICATION SETTINGS — SYSTEM DEVICES
SCREEN
Pre-adjustment REQUIREMENTS:
First the device has been installed.
Second, you pressed next at the “Add or
Remove...” screen.
Configure the device as follows:
1. In the “system devices” list, use the arrows to
highlight System. Touch edit.
2. In the “System” list, use the arrows to highlight
Humidification Control Mode. Touch edit.
3. Touch one of the radio buttons to select the mode of
humidification control; touch save.(After saving,
check that the current value now shows the new
selection).
4. Touch the back button to return to “Adjust a
setting...” screen.
NOTE - If the defaults for the settings are shown in red,
you are not required to make any changes, but you must
go into the edit tool, and touch save. When all red text is
gone, the back button will appear; touch it to return to the
“Adjust a setting...” screen.
How Humidification Mode Works
DISPLAY, BASIC AND PRECISION—These modes
allow user control of relative humidity between 15 and
45%. These conditions must be met for either mode to
operate:
 humidification mode has been enabled, and
 the unit is in HEAT mode, and
 humidification demand exists (24V present at H),
and
DISPLAY mode indicates humidification is OFF.
BASIC mode mode also requires presence of
heating demand [Y for HP heat, or W for gas heat (W
may be energized with G de-energized)].
PRECISION—(Available only if Wi-Fi is operational
or outdoor sensor is attached)

507428-01 18
Basic Dew Point Control adjustment mode will change
the humidification setpoint based on the outdoor
temperature and a user-defined dew point adjustment
setting.
Precision Dew Point Control adjustment mode will
operate when these conditions are met:
 humidification mode has been enabled, and
 the unit is in HEAT mode, and
 humidification demand exists (24V present at H).
HUMIDIFICATION SETTINGS — FEATURE
SCREEN
SYSTEM SETTINGS
current indoor humidity is 50%
humidifier
is ON
de-
humidifier
MEDIUM
40%
set to 50%
set to
ALL CHANGES MADE ON
THIS SCREEN ARE IN
STANTLY SAVED.
9:39 am Aug 15, 2012 ?
Wi-Fi
OFF
MEDIUM
HIGH
humidifier
display
is ON
humidification
settings
dehumidification
settings
Figure 14. Humidification Controls
1. From the Main Screen, touch the right arrow icon
to go the the Features screen.
2. From the Features screen, select system settings.
3. Touch the button of the humidification settings you
want to adjust; if it says humidifier OFF, one touch
will display a selection for ON.
4. When you touch the set-to button, the arrows
appear, allowing you to change to the desired
humidity percentage setting.
DEHUMIDIFICATION SETTINGS — SYSTEM
DEVICES SCREEN
Pre-adjustment REQUIREMENTS
First the device has been installed
Second, from the “Add or Remove
Non-communicating equipment?”, touch next.
Third, in the “Adjust a setting...” screen, configure
the device as follows:
1. In the “system devices” list, use the arrows to
highlight System. Touch edit.
2. Use arrows to highlight Min Dehumidification
Setpoint; touch edit. Note the current value (e.g.
45).
3. Use arrows to make changes; touch (After saving,
check that the current value now shows the new
selection).
4. Touch the back button to return to “Adjust a
setting...” screen.
DEHUMIDIFICATION SETTINGS — FEATURE
SCREEN
1. From the Main Screen, touch the right arrow icon
to go the the Features screen.

7-Day Programmable iComfort Wi‐Fi®Flex Thermostat
19
2. From the Features screen, select system settings.
3. Touch the button of the dehumidification settings you
want to adjust; if it says de-humidifier OFF, one touch
will display a selection for OFF, MEDIUM or HIGH.
4. Selecting MEDIUM or HIGH will bring on the set-to
button.
5. When you touch the set-to button, the arrows
appear, allowing you to change to the desired
de-humidifier percentage setting.
SYSTEM SETTINGS
current indoor humidity is 50%
humidifier
is ON
de-
humidifier
MEDIUM
40%
set to 50%
set to
ALL CHANGES MADE ON
THIS SCREEN ARE IN
STANTLY SAVED.
9:39 am Aug 15, 2012 ? Wi-Fi
OFF
MEDIUM
HIGH
humidifier
display
is ON
(default is ON)
humidification
settings
dehumidification
settings
Figure 15. Humidifier Controls (Outdoor Unit)
HOW DEHUMIDIFICATION MODE WORK — NO
EXTERNAL DEHUMIDIFICATION DEVICE
NOTE - OFF, MEDIUM and HIGH dehumidification modes
are also a function of the HVAC system with NO external
dehumidification devices installed.
In OFF mode, dehumidification if off.
In MEDIUM mode, dehumidification occurs if these
conditions are met and signals are present at specific
terminals:
 dehumidification has been enabled on installer
settings, and
 the unit is in COOL mode, and
 dehumidification demand exists (RH above setpoint),
and
 cooling demand exists (Y1 energized).
In HIGH mode, dehumidification occurs if all BASIC
conditions are true, except cooling demand may or may not
be present. Also note that:
Maximum over cool from cooling setpoint is 2ºF.
Deadband temperature is limited to a minimum of
5ºF (instead of 3ºF in DRY or MODERATE modes)
because of 2ºF overcooling.
AUXILIARY DEHUMIDIFIER — OUTDOOR UNITS
Control State Conditions
Auxiliary dehumidification
is controlled by
thermostat.
System must be in cooling mode and have
a call for dehumidification from the
thermostat. This will start the auxiliary
dehumidifier.
A separate wire from auxiliary dehumidifier
will need to be run to Gterminal on indoor
unit control to start the blower.
Auxiliary dehumidification
is controlled by dehumidi
fication control.
Needs a dehumidification demand from the
stand-alone dehumidification thermostat and a
separate wire run to G terminal on indoor unit to
start the blower.

507428-01 20
Using the Tests / Diagnostics Features
Blower
HP Heat - 1st Stage
HP Heat - 2nd Stage
Defrost Now
Cooling - 1st Stage
Cooling - 2nd Stage
Gas Heat - 1st Stage
Gas Heat - 2nd Stage
select all
select test to run
deselect all
skip tests
start
Only appears
if test item is
selected
Ö12
3
4
5
Figure 16. Selecting Tests
TO SELECT TESTS TO RUN
Use the following procedure to run tests for various
heating and cooling stage operations.
1. Select a specific test (1) to run or use the select all
(2) button to run all configurations. Use the deselect
all (3) button to un-check desired test.
2. Touch the start button (4) to run all selected tests or
touch skip tests (5) to end the test procedure.
3. After the tests are completed or you have selected
skip test select the exit button to end.
NOTE - Test mode lasts for 30 minutes (with the
temperature updating every 30 seconds) except for the
defrost test, which lasts 30 seconds. Tests feature
provides the technician time to manually verify the
equipment operation.
The tests feature is available after set up has been
completed once. After you touch next in the final set up
screen, the “select tests to run” screen (figure 16) will
appear. (If you want you may skip tests; touch skip
tests.)
To run all of the tests, touch select all. All boxes in the list
of tests will be checked. Or, touch box(es) next to test(s)
to run certain tests.
After the tests have been started, the screen will
describe which test is running and show a diagnostic
summary of each test (see figure 17). After reviewing the
results and concluding that no further tests are needed,
touch next to proceed to next test. The technician must
verify that the test procedure is producing the desired
result at the equipment.
After pressing next after the final test, the Testing
finished screen will appear (figure 18). At this point, use
the EXIT button (if you have completed the required set
up), or use diagnostics button (to analyze the system),
or use equipment button (if you wish to make any
changes to device details).