Lennox 22V26 Assembly instructions
©2022 Lennox Industries Inc.
Dallas, Texas, USA
Lennox®Smart Devices
Installation and Setup Guide
Lennox
®
Smart Room Sensor
(22V25)
Lennox
®
Wireless Extender
(22V26)
508227-01 10/2022
2
Table of Contents
Shipping and Packing List .................................................3
Lennox®Smart Room Sensor (22V25) ........................................ 3
Lennox®Wireless Extender (22V26).............................................. 4
Introduction........................................................................4
Hardware............................................................................................... 4
Software Applications ...................................................................... 4
Smart Devices Overview ....................................................5
Lennox Smart Room Sensor .......................................................... 5
Lennox Wireless Extender .............................................................. 6
Installation Considerations ...............................................6
Smart Room Sensor........................................................................... 6
Wireless Extender............................................................................... 7
Downloading Lennox Smart Applications........................7
Lennox Smart Technician App....................................................... 7
Lennox Smart Thermostat App ..................................................... 7
Lennox Smart Devices Details ...........................................8
Smart Room Sensor........................................................................... 8
Pairing/Factory Reset Button, Battery Compartment
and Light Display Location........................................................... 8
Light Indicators................................................................................8
Battery Power ...................................................................................9
Wireless Extender............................................................................... 9
Light Indicators................................................................................9
Outlet Line Power ..........................................................................10
Applying Power to the Smart Devices ............................10
Smart Room Sensor.........................................................................10
Wireless Extender.............................................................................11
Adding Smart Devices to Thermostat Smart Devices
Network.............................................................................11
Considerations ..................................................................................11
Using the Lennox Smart Technician App.................................12
Creating the Smart Devices Network .......................................12
Adding Devices...............................................................................12
Using the Lennox Smart Thermostat App...............................13
Smart Devices Installation...............................................13
Smart Room Sensor.........................................................................13
Placement .......................................................................................13
Wall Mounting ...............................................................................15
Using Smart Room Sensor Stand ..............................................15
Wireless Extender Installation .....................................................15
Smart Devices Management............................................16
Remove or Replace Smart Devices ...........................................16
Using the Lennox Smart Technician App.................................16
Using the Lennox Smart Thermostat App ...............................16
Performing Smart Device Factory Reset..................................17
Cycling Power for Troubleshooting ...........................................17
Occupancy Detection Feature for Temperature
Averaging..........................................................................17
Enabling Room Averaging using Occupancy Detection ...17
Occupancy Sensor Setting............................................................18
Occupancy Sensor Detection Pattern.......................................19
Smart Devices Thermostat Alert Codes ..........................20
FCC Compliance Statement .............................................24
Lennox Smart Devices Troubleshooting.........................25
3
CAUTION
Electrostatic discharge can aect electronic
components. Take precautions during unit
installation and service to protect the unit’s
electronic controls. Precautions will help to avoid
control exposure to electrostatic discharge by
putting the unit, the control and the technician
at the same electrostatic potential. Neutralize
electrostatic charge by touching hand and all tools
on an unpainted unit surface before performing any
service procedure.
IMPORTANT
Take care not to drop the sensor or extender during
unpacking. Dropping either could result in damage
to internal components which could render either
unusable.
IMPORTANT
DO NOT paint any Lennox smart devices. Doing so
could compromise functionality.
This guide can be used by both the technician to cre-
ate the smart devices network and add, replace and
remove Lennox Smart Room Sensors and Wireless
Extenders.
The homeowner can also use this guide to add, re-
place or remove Lennox Smart Room Sensors and
Wireless Extenders.
Shipping and Packing List
Please note that these products are sold separately.
®
Package 1 of 1 contains:
Parts Quantity
Lennox Smart Room Sensor with two AA
Lithium Batteries pre-installed 1
Sensor Stand 1
Wall Anchors 2
Screw #4 X 1.25 SMS 2
Wall Mounting Template 1
Warranty 1
Installer Quick Start Guide 1
Homeowner Quick Start Guide 1
4
®
Package 1 of 1 contains:
Parts Quantity
Lennox Wireless Extender 1
Warranty 1
Installer Quick Start Guide 1
Homeowner Quick Start Guide 1
IMPORTANT
Information concerning thermostat smart devices
user screens are listed in the Lennox S40 User
Guide.
Introduction
The Lennox®S40 Smart Thermostat's smart devices
network will
. The maximum supported smart de-
vices per smart devices network is:
• Six (6) Lennox®Smart Room Sensor
• Two (2) Lennox®Wireless Extender
• One (1) Lennox®Smart Air Quality Monitor
NOTE: The Lennox Smart Air Quality Monitor In-
stallation and Setup Guide is included with
that product.
If the homeowner has multiple S40 thermostats in the
home, then each thermostat can support up to nine
(9) smart devices simultaneously in the conguration
as listed above for each individual thermostat.
• Lennox® S40 Smart Thermostat hosts the smart
devices network.
• Lennox® Smart Room Sensor is used for tem-
perature averaging with up to a maximum of six (6)
Smart Room Sensors supported per a single smart
devices network.
• Lennox® Wireless Extender is used to extend
the smart devices network with up to a maximum
of two (2) wireless extenders supported per a sin-
gle smart devices network.
• Lennox® Smart Technician App is used by the
technician to create the smart devices network and
to manage all Lennox smart devices. This applica-
tion is available for both IOS 11.0 or higher (App
Store) and Android 9.0 or higher (Google Play).
• Lennox®Smart Thermostat App is used by the
homeowner to add or remove smart devices only
5
after the technician has created the smart devices
network using the Lennox Smart Technician
App. In addition the homeowner can manage
the temperature averaging feature as well. This
application is available for both IOS 11.0 or higher
(App Store) and Android 9.0 or higher (Google
Play).
Smart Devices Overview
• This device collects room temperature, humidity
and occupancy status and passes this information
to the S40 Smart Thermostat.
• When replacing batteries it is highly recommended
to always use lithium batteries. When using lithium
batteries the estimated battery life is two years.
• Maximum unobstructed view of smart device
signal under ideal conditions is 70 feet (21.3
meters). Maximum range could be aected by the
number of walls or oor and other obstacles which
the signal has to penetrate.
• Maximum unobstructed distance for the occupancy
sensing capability is 20 feet (6.1 meters) and
maximum width pattern of 110º at a mounting
height of ve (5) feet (1.5 meters) from the oor.
• The thermostat uses an algorithm to calculate
average room temperature based on room
occupancy / temperature sensor input along with
the thermostat's built-in sensors.
Where N is the number of smart room sensors in-
stalled.
• The Smart Room Sensor sends data to thermo-
stat in 2 to 20 minute intervals to preserve battery
life. The update rate is faster if rapid temperature
changes are detected. Otherwise, the average
sampling rate is every two minutes and a transmis-
sion rate is every 30 minutes.
NOTE: It could take 2-10 minutes to report initial
temperature data after adding the smart
device to the smart devices network. The
farther the smart device is from the S40
Thermostat, the longer it may take.
• Dimension: 4" x 5.5" x 3" (102 x 140 x 76 mm)
• Weight: 4.24 ounces (120 grams) without batteries
installed.
• Temperature Range:
»Display on thermostat: 40 to 100°F (5 to 37°C)
»Sensitivity: +- 1°F (+- 0.5°C)
»Operating range: 32 to 130°F (0 to 55°C)
6
• Humidity Range:
»Display on thermostat: 20% to 90% RH
»Operating range: 5% - 95% RH (non-condensing)
»Sensitivity of +- 5%
IMPORTANT
The Lennox Smart Room Sensor is not a zoning
product and will not solve problems related to poor
duct work and incorrect equipment sizing.
• Extends the eective smart devices network range.
• Powered by 120VAC outlet.
• Dimension: 4" x 5.5" x 2.5" (102 x 140 x 64 mm)
• Weight: 4.24 ounces (120 grams)
Installation Considerations
If at all possible it is recommended that all Smart
Room Sensors are installed on a wall. This insures
the device will not be lost or accidentally damaged.
Consider placement when addressing the occupancy
sensor detection pattern (see page 19).
If used with the provided stand, it is recommend that
the Smart Room Sensors is placed on a bookshelf or
desk out of reach of children or pets.
Do not install the Smart Room Sensors where it can
be aected by:
• Drafts or dead spots behind doors and in corners
• Exterior entrances or interior doors
• Heat generating equipment such as kitchen
appliances
• Hot or cold air from ducts
• Radiant heat from sun or appliances
• Direct sunlight
• Concealed pipes and chimneys
• Non-conditioned areas such as an outside wall
behind the sensor
Another consideration is smart device signal strength
interference by physical objects and materials. The
type and thickness of the material can aect how
much interference is induced. One or more of the fol-
lowing can interfere with the smart device signal:
• Large metal objects and appliances like ling
cabinets, metal doors, and refrigerators.
• Floor and ceiling plenum spaces featuring joists,
plumbing, duct work, and other materials.
7
• Plaster, concrete, and specialty glass such as
bulletproof or shatterproof glass
• Water, brick, and marble materials
• Wood, glass, and synthetic materials like plastic.
The Smart Room Sensors will indicate if adequate
signal strength is present (see "Table 1. Sensor -
Three Color Descriptions" on page 8). In case
of a weak signal, the Lennox Wireless Extender can
be used to improve the smart room sensor’s signal
strength and thus limit the impact of interference by
these sources.
Considerations are the same as for the Smart Room
Sensor plus a wall outlet in a optimal location for best
performance.
Downloading Lennox Smart Applications
Scan the QR codes listed as follows to
download the specic application you
desire.
Google Play
(AndroidTM)
App Store
(iOS)
Google Play
(AndroidTM)
App Store
(iOS)
8
Lennox Smart Devices Details
This section provides details on the Smart Room
Sensor buttons, battery compartment, stand and light
indicator location.
Pairing/Factory reset Button, Battery comPartment and
Light disPLay Location
Sensor Stand
Pairing / Factory
Reset Button
Relative Humdity
and Temperature
Sensors
Front Cover (removable)
Battery compartment
for two AA lithium batteries
Opening Latch (Depress
and pull tab to
remove front cover)
LED Light Pipe
Occupancy
Fresnel Lens
NOTE: LED light pipe is not visible on top of plastic surface.
User will see illumination on the front plastic when LED is on.
Occupancy Sensor
Figure 1. Sensor Light Indicator, Buttons, Sensor Vents,
Battery Compartment Locations
Light indicators
Table 1. Sensor - Three Color Descriptions
Color
Battery RED
A ashing red light in one minute
intervals indicates the battery is
low (20%). When the red light is o
it indicates battery life is good.
Signal
Strength BLUE
A ashing blue light in ve (5)
minute intervals indicates the
signal strength is low or connection
to the thermostat is lost.
When the blue light is o it
indicates signal strength is good
and connected to the smart device
network.
Pairing GREEN
• When batteries are inserted into
a new or unpaired device the unit
will automatically go into pairing
mode (ashing green light). The
unit will stay in pairing mode
for three (3) minutes. To restart
pairing mode, press the pairing
button for two (2) seconds.
• When a device has been paired
to the thermostat and new
batteries are installed, the unit
will ash a green light three times
after powering up.
9
Table 1. Sensor - Three Color Descriptions
Color
If there are more than two conditions are active
simultaneously, for example low battery and weak signal,
the light will alternate back and forth between blue and
red in one (1) second intervals.
See "Smart Devices Thermostat Alert Codes" on
page 20 for a complete list of alerts applicable to
the Smart Room Sensor and Wireless Extender that
are generated by the Lennox S40 Smart Thermostat.
Battery Power
Two lithium batteries are pre-installed. Removing the
battery insulation tape will allow the smart room sen-
sor to be powered up.
IMPORTANT
When replacing the batteries, use ONLY lithium
batteries. Using any other type of battery is not
recommended and will reduce operational duration
signicantly.
Pairing Button
Prongs
View area
for LED
Keyhole Factory Reset button (recessed)
Figure 2. Wireless Extender Buttons
and Light Indicator
Light indicators
NOTE: The light on the device is only on when
there is an issue with signal strength or dur-
ing pairing mode.
See "Smart Devices Thermostat Alert Codes" on
page 20 for a complete list of alerts applicable to
the device that are generated by the S40 thermostat.
10
Table 2. Wireless Extender Light - Two Color Descriptions
Color
Light
Signal
Strength BLUE
A solid blue light indicates
the signal strength is low or
connection to the thermostat
is lost.
When the blue light is o it
indicates signal strength is
good and connected to the
smart devices network.
Pairing GREEN
When a paired Wireless
Extender is powered up, it will
ash green three (3) times.
When a unpaired Wireless
Extender is powered up, it will
ash green for two (2) minutes
which indicates the units is in
pairing mode.
outLet Line Power
The device is powered by an 120VAC outlet.
Applying Power to the Smart Devices
1. Depress and pull tab to remove smart room
sensor front cover (see "Figure 1. Sensor Light
Indicator, Buttons, Sensor Vents, Battery Com-
partment Locations" on page 8 for details).
2. Remove the insulation tape located between the
battery and the sensor's positive (+) terminal
(see "Figure 3. Insulation Tape Removal" on
page 10).
Remove battery
insulation tape
Figure 3. Insulation Tape Removal
Once insulation tape is removed the unit will automat-
ically go into pairing mode (ashing green light). The
11
unit will stay in pairing mode for three (3) minutes. To
restart pairing mode, press the pairing button for two
(2) seconds.
Plug the extender into to a 120VAC power source. A
ashing green light on the device will indicate it is in
pairing mode.
Adding Smart Devices to Thermostat Smart
Devices Network
1. Only the S40 Smart Technician App can be
used to create the smart devices network. Both
S40 Smart Technician and Smart Thermostat
Apps can be used to add/remove sensors.
2. When adding or removing the smart devices the
S40 Smart Technician or Smart Thermostat
Apps (mobile device) will need to be within 10
feet (3 meters) of the thermostat.
3. If the smart device just added does not appear
under the (Equipment List or My Home)
screens, then allow a few minutes to past
before checking again.
4. Do not switch back-and-forth between your
mobile device's screens during the adding or
removing procedure.
5. If one of the following conditions occur when
adding a battery powered smart device:
• Smart device does not appear under Equip-
ment List or My Home Screens.
• Smart device appears on both screens but
conguration details are missing in the de-
vice's details screen.
It is possible that the battery operated smart
device may have gone into sleep mode. If this
occurred then updated information could take
between 2 to 10 minutes to refresh the device's
screen information.
6. If adding a smart device which will be out of
direct range of the thermostat and will connect
via a Lennox Wireless Extender, then the
Lennox Smart Technician or Thermostat
Apps do not required the user's mobile device
to be near the thermostat for the adding or
removing procedure.
7. Always give each smart device a unique name.
8. After removing a functional smart device, make
sure to perform a factory reset.
9. In case the adding procedure fails, then always
perform a factory reset on the smart device
before trying to add it again.
12
IMPORTANT
Only one smart device can be paired at a time.
creating the smart devices network
The Lennox S40 Smart Thermostat must have al-
ready been commissioned before the smart devices
network can be created and adding any smart de-
vices.
IMPORTANT
The rst device must be added by the technician in
order to create the smart devices network.
ADD SENSOR OR EXTENDER USING THE
TECHNICIAN APP
Add Device
Dealer Service
Center
Equipment
Settings
Discover Smart
Device
Smart Devices Network is created
(When first device is added)
Name Smart
Device
Add another? Yes
Figure 4. Creating Smart Devices Network and Adding
Smart Devices Using the Lennox Smart Technician App
adding devices
1. Open the Lennox Smart Technician App on
your mobile device and select your language.
2. From the S40 thermostat home screen, go to
Menu > Settings > >
and select
Connect to Lennox Smart Technician App.
3. Once the connection between the Lennox
Smart Technician App and the S40 is
established, then from the Technician
App Dealer Service Center screen select
Equipment Settings > Add Devices.
4. Follow the on screen prompts to create the
smart device network and add a smart device.
IMPORTANT
DO NOT interrupt the adding of the device. If
interrupted the device will need to be factory-reset.
13
ADD SENSOR OR EXTENDER USING THE
THERMOSTAT APP
Settings
Home Screen
Menu
Add Device
Name Smart
Device
Add another? Yes
NOTE: Smart devices cannot be added to the smart devices network until after
the technican creates the smart devices network and adds the first device using
the Lennox Technican App.
Figure 5. Adding Smart Device Using the Lennox Smart
Thermostat App
NOTE: The Lennox Smart Thermostat App must
be connected to the thermostat to perform
the following procedure.
IMPORTANT
The rst device must be added by the technician
in order to create the smart devices network.
Afterwards the homeowner can add or remove
devices using the Lennox Smart Thermostat App.
1. Open the Lennox Smart Thermostat App and
from the home screen select Menu in the upper
left-hand corner of the screen.
2. Under select Settings.
3. Under select .
4. Follow the screen prompts for adding a sensor
or extender to an existing sensor network.
NOTE: When naming smart devices no blank spac-
es or special characters are allowed.
Smart Devices Installation
PLacement
• Locate the desired location for the Smart Room
Sensor.
• If the Smart Room Sensor is out of range of your
S40 thermostat (approximately 70 feet (21.3
meters) a blue light on the device will indicate so
with the blue light ashing every ve (5) minutes)
14
and a message will be displayed for the device on
the My Home menu option.
• Move device closer to the S40 thermostat or
add an Lennox Wireless Extender between the
sensor and thermostat.
• For wall placement, install room sensor at a minium
height of 5 feet (1.52 meters) on an interior wall.
See "Wall Mounting" on page 15 for illustration
example.
• Use the provided wall template when mounting
sensor to the wall.
• For sensor desktop/table placement use the
provided stand.
• For eective temperature sensing, mount the
sensor in a location enabling it to sense the general
room environment. The sensor must NOT be:
»Blocked from normal air circulation by ob-
structions (e.g., behind curtains or cubicle
walls).
»Exposed to articial heat sources (e.g., lights,
computers, copiers, or coee makers) or to
sunlight (at any time of the day).
»Exposed to direct sunlight.
»Exposed to drafts from windows, doorways,
diusers, or returns.
»Exposed to air ow through the conduit (e.g.,
from leaks in plenum ducts) or other holes
into the wall cavity.
»Mounted on an exterior wall.
»Mounted on or near a large thermal mass
(e.g., a concrete block wall).
NOTE: The above factors primarily aect tempera-
ture sensing, but some also aect accurate
humidity and occupancy sensing as well.
»If the device is out of range of your S40 ther-
mostat a blue light will turn on.
• For eective occupancy detection, determine a
location that will maximize the area of detection in
a room.
»The smart room sensor occupancy detec-
tion function has a 100 degree horizontal
span and a 32 degree vertical span. Improper
placement may limit the area of occupancy
detection for the sensor.
»Large rooms may require more than one sen-
sor to ensure occupancy detection. Please
see "Figure 9. Occupancy Sensor Detection
Pattern Examples" on page 19 for ex-
amples of optimal mounting locations for the
smart room sensor.
15
waLL mounting
1. Conrm that the desired smart room sensor
location has good signal strength.
2. Select wall location for sensor installation.
Minimum 6” (15.24 cm)
from corner
Minimum 5’ (1.52 m)
from oor
3. Use the provided wall template along with a
eld-provided leveler tool for proper horizontal
alignment on the wall before marking the
mounting holes.
NOTE: The distance between the to mounting
points is 3/4" (19mm).
4. Use the provided screws and wall anchors (for
drywall applications) if needed.
NOTE: Screw depth adjustments may be required
in order to accommodate a snug t for the
sensor when attaching to the wall.
Insert wall anchors in hole until flush with wall.
3/4”
(19 mm)
using smart room sensor stand
If the stand is used, then the smart room sensor
should be placed out of reach of children or pets.
Possible locations can include a book shelf or a desk.
Wall mounting the sensor is preferred to avoid poten-
tial loss of or damage to the smart room sensor.
• Place the wireless extender mid-point if possible
between the thermostat and the furthest smart
room sensor.
16
• If the wireless extender is out of range of the
thermostat, a solid blue light on the device will
indicate so.
Smart Devices Management
REPLACE OR REMOVE SMART DEVICE USING THE TECHNICAN APP
Smart Device
Replace Remove
Control
Center Equipment
Figure 6. Replace or Remove Smart Devices using the
Lennox Smart Technician App
IMPORTANT
It is important that at least one smart device
needs to be paired to the smart devices network.
Removing all devices will deactivate the smart
devices network. Creating a new network will have
to be accomplished by your installer.
using the Lennox smart technician aPP
To replace the installed device from the Lennox S40
Smart Thermostat, use the following procedure:
1. Pair the Lennox Smart Technician App to the
thermostat.
2. Go to Dealer
3. Select the smart room sensor or wireless
extender to remove or replace and follow the
screen prompts.
To reuse the device that was just replaced, perform a
factory reset (see "Performing Smart Device Factory
Reset" on page 17).
using the Lennox smart thermostat aPP
1. Conrm your Lennox Smart Thermostat App
account has been setup and thermostat added
to it.
2. Go to Menu > > Settings > .
3. Select the smart room sensor or wireless
extender to remove or replace and follow the
screen prompts.
NOTE: Instructions are provided in detail on the
screens to provide instructions on how to
proceed.
To reuse the device that was just replaced, perform a
factory reset (see "Performing Smart Device Factory
Reset" on page 17).
17
Use the following procedure to perform a factory re-
set if the device being removed is operable.
1. Press and hold the Pairing button for ten (10)
seconds.
2. If successful a ashing green light will appear
on either device. This indicates the devices can
be paired again to a smart device network.
Use the following procedures to cycle power:
1. : To cycle power on the
sensor, remove the sensor batteries and then
reinstall them.
: To cycle power on the
wireless extender, unplug the device from the
wall outlet and then reinstall.
Occupancy Detection Feature for
Temperature Averaging
The following two features can be set using either the
thermostat or Lennox Smart Thermostat App using
the system setting screen.
From the home screen, go to Menu > > Set-
tings > .
System Settings
Back TV Room
Current Temperature
Wi-Fi
Settings
Devices
Away
TV Room
TSTAT
Battery Sensor
Light Switch
Current Temperature
Fan
Heat/Cool
Humidity
iHarmony Zoning
Notifications
Ventilation
System Info
Feels Like
Peak Monitoring
Thermostat Off
Laura’s Room On
TV Room On
Off
Participating Sensors in Temperature Averaging Based on Occupancy
Figure 7. Thermostat Current Temperature Screen
18
Figure 8. Smart Thermostat App Current Temperature
Screen
The occupancy detection feature is built into every
sensor. The settings are as follows:
• OFF - When the occupancy feature is turned OFF,
the thermostat will always include the sensor in
temperature averaging.
• ON - When the occupancy feature is turned ON,
the thermostat will only include the sensor in
temperature averaging if the room is .
19
This indicates occupany detection pattern.
NOTE: The maximum occupancy detection by the sensor could be reduce by
furniture, applicances and field of range of the occupancy sensor.
TOP VIEW:
SIDE VIEW:
(6.1 m)
20 ft
(6.1 m)
20 ft
(1.5 m)
5 ft
(6.1 m)
20 ft
(18.1 mm)
0.71 in
Sensitive
Elements
(23.4mm)
Flat View of Lensed Area
0.96 in
Figure 9. Occupancy Sensor Detection Pattern Examples
20
Smart Devices Thermostat Alert Codes
To access a more detailed description of the alert code, press the down arrow to expand the description.
• - Your system is in a No Heat/ No Cool or not operating condition. Dealer service
call is needed to get the system running
• - System is not reaching set point or is partially operating. A Dealer will need to
service it with 24-48 hours
• alerts are those intervals you put in the thermostat as reminders to change lters,
replace UV lamps, tune up systems.
• System is operating normally. Collected thermostat data is accessible
to Dealer as system history.
Table 3. Thermostat Smart Devices Alert Codes
Alert
ID Priority Message Troubleshooting
70501 Service Soon Custom Sensor Name:
Internal Data Fault
Cycle power to the Smart Room
Sensor (see "Cycling Power for
Troubleshooting" on page 17 for
procedure).
After power cycle, wait for ten
(10) minutes for self-clearing
to take place, if condition is
resolved for temperature and
relative humidity.
For occupancy sensor self-
clearing will take forty-ve
(45) minutes.
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