Lennox 21L07 User manual
©2021 Lennox Industries Inc.
Dallas, Texas, USA
INSTALLATION
INSTRUCTIONS FOR
WIRELESS SENSOR AND
REPEATER KITS
TEMPERATURE / RELATIVE HUMIDITY
SENSOR
CATALOG # 21L07
WIRELESS REPEATER
CATALOG # 21L09
Table of Contents
...........................................2
Overview........................................................................3
Sensor (21L07)..............................................................5
Sensor – Power Options..................................................................6
Sensor – S-Bus Wired Installation Setup.........................................6
Sensor – Wired Standalone / NCP Setup........................................6
Sensor – Operation with BACnet Network (M3/M4 ONLY)............12
Sensor – Wiring Troubleshooting...................................................14
Sensor – Wireless Installation Setup.............................................15
Sensor – Wireless Standalone ......................................................16
Sensor – Placement and Conrming Location (Test) ....................17
Sensor – Wireless Checkout / Troubleshooting.............................18
Sensor – Signal Strength Alert Indication ......................................18
Sensor – Low Battery Indication....................................................18
Sensor – After Hour Override (AHO) .............................................18
Sensor – Data Verication .............................................................19
Sensor – Network Removal and Reset .........................................19
Repeater (21L09).........................................................20
Repeater – 24VAC Line Power......................................................20
Repeater – Wireless Installation Setup..........................................20
Repeater – Signal Strength Alert Indication...................................21
Repeater – Placement and Conrming Location (Test).................21
Repeater – Network Removal and Reset ......................................22
Repeater and Sensor Placement Requirements......23
FCC Compliance Statement ......................................26
FCC RF Exposure Information .................................26
2
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
Improper installation, adjustment, alteration,
service or maintenance can cause personal
injury, loss of life, or damage to property.
Installation and service must be performed by
a licensed professional installer (or equivalent)
or a service agency.
Shipping and Packing List
Please note that wireless temperature sensor and
wireless repeater are sold separately.
Wireless Temperature / Relative Humidity
Sensor (21L07) 106924-01
Package 1 of 1 contains:
1 - Wireless Sensor
4 - AA Lithium batteries
2 - Wall anchors
2 - Screw #6 X 1.25 SMS
1 - Warranty and Installation instruction
Wireless Repeater (21L09) 106926-01
Package 1 of 1 contains:
1 - Wireless Repeater
2 - Wall anchors
2 - Screw #6 X 1.25 SMS
1 - Warranty and Installation instruction
3
Overview
The wireless system employs the following
components:
M4/W4 Wireless Gateway System:
• Plenum-rated Bluetooth Low Energy (BLE)
antenna which will assist in boosting the sig-
nal from to Lennox CORE Unit Controller to:
»CORE Service App
»Wireless room sensors (wireless
mode)
»Wireless repeaters
• Ecient design allows for use in vertical and
horizontal applications
• Return air mounted antenna reduces signal
loss from roof and connected to gateway sys-
tem via coax cable.
Wireless Repeater (21L09)
• Used to “repeat” signal to sensors
• Increases eective range
• Up to ve repeaters can be used per rooftop
unit
• Powered by external 24VAC only
• Used in wireless application only
• Locking captive screw
Wireless Temperature / Relative Humidity
Sensor (21L07)
• TMP / RH / After hours override
• Unit powered by either 24VAC or four AA bat-
teries. Batteries provided but not installed.
Greater than two year battery life using AA
Lithium batteries.
NOTE: Please allow for a 45 minute adjustment
period on 24VAC powered sensors on
temperature readings
NOTE: Battery life of greater than two years is
subject to the sensor operating under
good signal coverage. If signal is weak or
the RTU is o for long periods the signal
strength LED will be on and the battery
will be depleted
• Wireless or S-BUS
• Locking captive screw
• Up to ve sensors can be used per rooftop
unit
4
Lennox®CORE Service Application Used for
adding Sensors and Repeaters)
• Connects to the Lennox®CORE Unit Control-
ler via the wireless gateway (W4)
• Pairs with a simple button press (requires
physical access)
• Used for installation of wireless sensors
and repeaters, service, and maintenance of
Model L rooftop units
5
Sensor (21L07)
RESET button
BEACON enable button
BATTERY status LED
SIGNAL strength LED
Air Circulation Vents
CAPTIVE screw
After Hour Override
(AHO) enable switch
LCS-5030 TMP/RH SENSOR
CATA LOG # 21L07
Figure 1. Wireless Sensor Buttons and
Indicators
Figure 2.
(Factory Defaults) Label
NOTE: Changed switch settings only take af-
fect after a sensor power reset. Remove
24VAC or battery power after switch set-
ting changes.
NOTE: Switch settings are 1 = ON and 0 = OFF
Example:
S1 switch 6 (MODE)
ON = 1 – STAND ALONE
OFF = 0 – NETWORK/BAS (DEFAULT)
NOTE: S2 switches 4 and 5 are for future use
and have not aect on sensor operations.
6
• Battery Power: When the wireless sensor is
powered by the included four AA Lithium bat-
teries the sensor has a typical operational life
of two years.
• Line Power: When the wireless sensor is
powered by external line power (24VAC).
Battery Compartment
(4 AA Lithum Batteries)
Figure 3. Wireless Sensor Battery
Compartment
S-Bus connections can be used with M1-8 (IMC),
M2, M3 and M4 Unit Controllers. The sensor can
be used in the following congurations:
• By itself with a controller (Wired Standalone)
• In a network with a Lennox Network Control
Panel (NCP)
• In a network with a third party BACnet Con-
troller – M3/M4 Unit Controllers ONLY.
Standalone operation is a consist of (1) Unit
Controller and (1) sensor without a building
automation system (BAS). See Figure 4. Wired
Standalone for wiring connection detail example.
7
NCP
The sensor can also function with a unit controller
with an NCP/L-Connection System. The 21L07 is
compatible in standalone or with an NCP with the
following unit controllers:
• M1-8
• M2
• M3
• M4
See Figure 5. NCP Wiring Conguration on page
8 for wiring connection detail example..
RTU BUS
Address = 2
S-BUS OPERATION IN STANDALONEMODE
SENSOR BUS
Address = 2
NOTE: Wireless sensor S-Bus address MUST
match RTU S-Bus address.
DRAIN WIRE
NOTE: Use 22AWG, one twisted pair shield cable
(100% aluminium shield with strain wire with Teflon jacket.
Recommend Lennox Catalog numbers 94L63, 27M19, 68M25
or Beld Type 88761 or equivalent.
Figure 4. Wired Standalone
8
NCP
RTU
S-Bus Address = 1
RTU
S-Bus Address = 2
RTU
S-Bus Address = 3
RTU
S-Bus Address = 4
Sensor
S-Bus
Address = 1
S-BUS OPERATIONS WITH NETWORK CONTROL PANEL (NCP)
NOTE: Use 22AWG, 1 twisted pair shielded cable (100% aluminum shield with strain wire with Teflon™
jacket). Recommend Lennox catalog numbers 94L63, 27M19, 68M25 or Belden Type 88761 or
equivalent.
Drain
Wire
Drain
Wire
Drain
Wire
Drain
Wire
Drain
Wire
NOTE: Wireless Sensor S-Bus address MUST match RTU S-BUS address.
Sensor
S-Bus
Address = 2
Sensor
S-Bus
Address = 3
Sensor
S-Bus
Address = 4
Drain
Wire
Drain
Wire
Drain
Wire
Figure 5.
9
NOTE: The following S1 and S2 switches need
to be set before power is applied to the
sensor.
STAND ALONE AND S-BUS
SETTINGS
NETWORK/BAS AND S-BUS
SETTINGS
NOTE: S2 switches 4 and 5 are for future use
and have not aect on sensor operations.
1. Set S1 (switches 1 through 5) for S-BUS Ad-
dress to match the S-BUS address of the
RTU. In operation with an NCP, each RTU
must have a unique address.
NOTE: Lennox M3/M4 unit controllers use a de-
fault S-BUS address of 2. If the sensor
and unit controller are both congured
to use address 2, there is no need to go
through S-BUS setup to change the unit
S-BUS address.
2. Set S1 (switch 6) for Mode to the ON position
to enable STAND ALONE or OFF (factory de-
fault) for NETWORK/BAS.
3. Set S2 (switch 3) Operation Mode to ON, for
wired S-BUS mode.
4. Connect sensor and RTU controller using rec-
ommended wire (two conductor, twisted-pair,
shielded, 22AWG). See Figure 5. NCP Wiring
Conguration on page 8 for further details.
5. For setup with the M4 Unit Controller use the
following procedure:
a. Download the CORE Service app.
b. Apply power to the sensor.
c. Using the CORE Service app, go to the
Rooftop Unit menu and select Network
Integration under Setup.
d. Select the Network Setup Wizard.
e. Select S-Bus / Wireless Sensor under
Network Setup Wizard and select Next.
f. Enter the S-Bus Address and select
Next.
10
g. Select the Control Source as Room
Sensor then select Next.
h. Select CO2 sensor source as Local or
None.
i. Select Relative Humidity Sensor
Source as Network and select Next.
j. Select Temperature Sensor Source
as Network and select Next.
k. Set Occupied Blower Mode as Auto
cycling/Continuous depending on
ventilation need and select Next.
l. Select Backup Mode as None/Wired
Thermostat/Return Air Backup and
then select Next.
m. The summary is displayed and then se-
lect Next after checking the displayed
setting information.
n. Select Finish.
6. For setup with the M3 Unit Controller use
the following procedure:
a. Navigate on the M3 Unit Controller
screen to Setup > Network Integration.
b. Select L-CONNECTION and select
SAVE.
c. Enter the S-Bus address and select
SAVE.
d. Select the Control Mode as Room
Sensor then select SAVE.
e. Select CO2 network sensor source
as NO, then select SAVE.
f. Select Relative Humidity Network
Source as YES, then select SAVE.
g. Select Temperature Network Source
as YES, then select SAVE.
h. Set Occupied Blower Mode as Auto
Cycling/Auto-Continuous 1/2/3 and
select SAVE.
i. Select Backup Mode as None/Wired
Thermostat/ Return Air Backup and
then select SAVE.
NOTE: Lennox recommends selecting backup
mode (Return Air Backup).
j. Finish the wizard and return to the main
menu.
7. For Setup with the M2/M1-8 Unit Control-
lers: Refer to the application manual for
these controllers. Setup will be similar to the
M3 Unit Controller.
11
BACNET
EXECUTIVE
CONTROLLER
RTU
BACNET MAC
Address = 1
S-Bus Address = 2
RTU
BACNET MAC
Address = 2
S-Bus Address =2
RTU
BACNET MAC
Address = 3
S-Bus Address = 2
Sensor
S-Bus
Address = 2
Sensor
S-Bus
Address = 2
Sensor
S-Bus
Address = 2
S-BUS OPERATIONS WITH BACNET -WIRED
NOTE: Use 22AWG, 1 twisted pair shielded cable (100% aluminum shield with strain wire with Teflon™
jacket). Recommend Lennox catalog numbers 94L63, 27M19, 68M25 or Belden Type 88761 or
equivalent.
NOTE: Wireless Sensor S-Bus address MUST match RTU S-BUS address.
Drain
Wire
Drain
Wire
Drain
Wire Drain
Wire
Drain
Wire
Drain
Wire
Drain
Wire
Figure 6.
12
(M3/M4 ONLY)
The sensor can also function with a unit controller
with an BACnet Building Automation System
(BAS). The 21L07 is ONLY compatible in this mode
of operation with M3 and M4 Unit Controllers.
NOTE: The following S1 and S2 switches should
be set before power is applied to the sen-
sor.
NETWORK/BAS AND S-BUS
SETTINGS
1. Set S1 (switches 1 through 5) for S-BUS
Address to match the S-BUS address of the
RTU. Each RTU must have a unique address.
2. Set S1 (switch 6) for Mode to the OFF posi-
tion for NETWORK/BAS.
3. Set S2 (switch 3) Operation Mode to ON, for
wired S-BUS mode.
4. Connect sensor and RTU controller using rec-
ommended wire (two conductor, twisted-pair,
shielded, 22AWG). See Figure 6. BACnet
Wiring Conguration on page 11 for further
details.
5. For setup with the M4 Unit Controller use the
following procedure:
a. Download the CORE Service app.
b. Apply power to the sensor.
c. Using the CORE Service app, go to the
Rooftop Unit menu and select Network
Integration under Setup.
d. Select the Network Setup Wizard.
e. Select BACnet under Network Setup
Wizard and select Next.
f. Enter the BACnet MAC address,
Device Instance, and Baud Rate and
select Next.
g. Select the Control Source as Room
Sensor then select Next.
h. Select CO2 sensor source as Local or
None.
i. Select Relative Humidity Sensor
Source as SBUS / Wireless Sensor
and select Next.
13
j. Select Temperature Sensor Source
as SBUS / Wireless Sensor and select
Next.
k. Set Occupied Blower Mode as Auto
Cycling/Auto-Continuous1/2/3 and
select Next.
l. Select Backup Mode as None/Wired
Thermostat/ Return Air Backup and
then select Next.
NOTE: Lennox recommends setting a backup
mode (Return Air Backup).
m. The summary is displayed and then
select Next after checking the displayed
setting information.
n. Select Finish.
6. For Setup with the M3 Unit Controller:
a. Use the M3 Unit Controller and navigate
on the screen to Settings > RTU Op-
tions > Edit Parameter.
b. Use the up arrow until the screen shows
DATA ID = 385, then select SAVE.
c. Set ID 385 (BACnet and CS COEXIST)
to 1, then select SAVE.
d. Navigate on the screen to Setup > Net-
work Integration.
e. Select L-CONNECTION and select
SAVE.
f. Enter the S-BUS Address and select
SAVE. This should match the S-BUS Ad-
dress on switch S1 on the sensor.
NOTE: Lennox M3/M4 unit controllers use a de-
fault S-BUS address of 2. If the sensor
and unit controller are both congured
to use address 2, there is no need to go
through S-BUS setup to change the unit
S-BUS address.
g. Select the Control Mode as Room Sen-
sor then select SAVE.
h. Select CO2 network sensor source as
NO, then select SAVE.
i. Select Relative Humidity Network
Source as YES, then select SAVE.
j. Select Temperature Network Source
as YES, then select SAVE.
k. Set Occupied Blower Mode as Auto
Cycling/Auto-Continuous1/2/3 and
select SAVE.
l. Select Backup Mode as None/Wired
Thermostat/ Return Air Backup and
then select SAVE.
14
NOTE: Lennox recommends setting a backup
mode (Return Air Backup).
m. Finish the wizard and return to the main
menu.
n. Navigate on the screen to Setup > Net-
work Integration:
o. Select BACNET and select SAVE.
p. Enter the BACNET MAC ADDRESS,
and BAUD RATE and select SAVE. The
BACnet MAC address should be unique
for each RTU. It does not have to match
the S-BUS address.
q. Select the Control Mode as Room Sen-
sor then select SAVE.
r. Select CO2 network sensor source as
NO, then select SAVE.
s. Select Relative Humidity Network
Source as YES, then select SAVE.
t. Select Temperature Network Source
as YES, then select SAVE.
u. Set Occupied Blower Mode as Auto
Cycling/Auto-Continuous1/2/3 and
select SAVE.
v. Select Backup Mode as None/Wired
Thermostat/ Return Air Backup and
then select SAVE.
NOTE: Lennox recommends setting a backup
mode (Return Air Backup).
w. Finish the wizard and return to the main
menu.
1. Make sure 24VAC is supplied to the sensor.
2. Check communication cable wiring.
3. Check the sensor data from the zone sensor.
• For the M1 unit controller (IMC), use the
IMC MODE TEMP switch to display the
data.
• For the M2 unit controller, use the DATA >
SENSORS menu to display the data.
• For the M3 Unit Controller, use the DATA
> IN/OUTPUT > SENSORS > NET-
WORK.
• For the M4 Unit Controller, use DATA >
SYSTEM DATA > SENSORS > OUT-
PUTS > NETWORK.
15
Wireless operation is ONLY compatible with M4
Unit Controller). To commission a wireless sensor,
you must rst pair the CORE Service App to the
applicable RTU.
After the App is connected to the RTU, and the
sensor search process has begun (step 3), you
can leave the range of the RTU and provision
sensors in the space.
IMPORTANT
Sensors MUST be added prior to the repeaters,
otherwise power needs to be removed from the
repeaters before adding the sensors.
1. Open the CORE Service App and navigate
to RTU Menu > Network Integration >
Wireless Sensor Network Setup > Wireless
Sensor Network.
NOTE: Provisioning the RTU is only required
once. If you have already completed this
step, proceed to step 3. Select Adding,
and wait for the adding process to com-
plete.
2. Click Add node on the Network Nodes
screen. This triggers the CORE Service App
to scan for new sensors or repeaters.
3. Press and hold for two seconds the “Beacon
button” on the side of the wireless sensor.
4. The MAC address of the wireless sensor
should be visible now on the CORE Service
App.
NOTE: The wireless sensor MAC address can
be veried with the label axed to the
cover of the sensor.
5. Optionally, name the sensor. Otherwise follow
the prompts on the screen to nish the setup
process.
6. Verify that the CORE Service App displays the
“Node Provisioned” on the Provision Sensor
Network.
IMPORTANT
DO NOT interrupt the adding process of the
wireless sensors. If interrupted the sensor will
need to be factory-reset.
Maximum of ve wireless sensors can be
provisioned per RTU
16
Standalone operation is a setup of one CORE Unit
Controller and up to ve wireless sensors without
a Building Automation System (BAS).
NOTE: The following S1 and S2 switches should
be set before power is applied to the sen-
sor.
STAND ALONE AND BLE
SETTINGS
1. Set S1 (switch 6) the MODE switch to ON to
enable STAND ALONE operation.
2. Set S2 (switch 3) OPERATION MODE switch
to OFF to enable wireless BLE operation.
3. Download the CORE Service App and use the
following procedure:
a. Using the CORE Service App, go to the
Rooftop Unit menu and select Network
Integration under Setup.
b. Select the Network Setup Wizard.
c. Select S-Bus / Wireless Sensor under
Network Setup Wizard and select Next.
d. Leave the S-Bus address in its current
setting and select Next.
e. Select the Control Source as Room
Sensor then select Next.
f. Select CO2 sensor source as Local or
None.
g. Select Relative Humidity Sensor
Source as Network and select Next.
h. Select Temperature Sensor Source as
Network and select Next.
i. Set Occupied Blower Mode as Auto
cycling/Continuous depending on
ventilation need and select Next.
j. Select Backup Mode as None/Wired
Thermostat/Return Air Backup and
then select Next.
k. The summary is displayed and then
select Next after verifying the displayed
setting information.
l. Select Finish.
17
The wireless sensor has a test functionality to
conrm placement of the sensor is acceptable
range of the RTU. To test the sensor placement:
1. Take the sensor to the desired location.
2. Hold the beaconing button for ve seconds
and release.
3. Observe the battery status (battery powered
units only) and signal strength LED (see Table
1. Sensor LED Descriptions).
NOTE: Wait 5 to 20 seconds for the test to com-
pete and observe the status of the battery
(if applicable) and signal strength LED
Table 1. Sensor LED Descriptions
Battery LED
Signal
Indicator
LED
Description
O 3 Blinks
Battery is good, and
sensor is within range.
Sensor is good to install.
Blinking for 10
seconds 3 Blinks
Sensor is within range,
but battery power is low.
Replace battery.
Table 1. Sensor LED Descriptions
Battery LED
Signal
Indicator
LED
Description
Blinking for 10
seconds
Solid for 10
seconds
Battery power is low,
and sensor is out of
range. Move sensor
closer and replace
batteries.
O Solid for 10
seconds
Battery is good, but
sensor is not within
range. Re-Test, or nd a
closer location.
O O
Sensor does not have
power. Power sensor
and re-test.
In terms of BLE signal strength, in the technician
application the following is display for signal
strength:
• Out of range: <= -88 dBm
• Low RSSI: -71 to -87 dBm
• Fair RSSI: -56 to -70 dBm
• Good RSSI: >= -55 dBm
18
This step may be required to verify whether added
wireless sensor is grouped and communicating
with the rooftop unit.
Sensor data will be displayed on the CORE Service
App dashboard screen. More details are available
in the Sensor Menu (RTU Menu > Network
Integration > Wireless Sensor Network Setup >
Wireless Sensor Network).
1. Make sure 24VAC / AA Battery Power is
supplied to the sensor.
2. Battery power can be used temporarily to con-
rm signal strength by moving sensor closer
to unit / on roof.
NOTE: Wireless range will vary based on build-
ing construction.
NOTE: By default the LED indicators are set to
ON (enabled).
Once the wireless sensor is added successfully,
it will communicate with the RTU. If the signal
strength is weak, the Signal Strength LED indictor
will be ON for 10 seconds.
The Battery LED will blink for 10 seconds when the
battery voltage drops below 20%. When used with
an M4 Unit Controller an alarm will be activated.
After hour override can be triggered by pressing
the ‘AHO button’ on wireless sensor. The AHO
event will notify the associated roof top unit. The
roof top unit decides and performs AHO based
on its ‘Network type’ selection. Refer to the unit
controller manual to congure the duration of the
after-hours override.
NOTE: After Hour (Hr) Override is disabled by
default, and can be enabled by setting
the S2 (switch 1) to ON.
NOTE: The following S2 switch changed setting
should be set before power is applied to
the sensor or power cycled if already in-
stalled.
AFTER HOUR OVERRIDE ENABLED
SETTING
19
This step may be required to verify whether added
wireless sensor is grouped and communicating
with the rooftop unit.
Sensor data will be displayed on the CORE Service
App dashboard screen.
To remove the node (sensor) from the RTU, use
the CORE Service App and navigate to RTU
Menu > Network Integration > Wireless Sensor
Network.
1. Select the node (sensor) to remove.
2. Select Remove Sensor at the bottom of the
screen.
3. The screen Remove Sensor will appear, se-
lect Yes to proceed.
4. Press and hold the beacon button for two sec-
onds to remove the node (sensor) from the
BLE mesh network.
5. Enter the sensor name on this screen and
select Proceed.
IMPORTANT
It is recommended that any sensors that are
taken out of use should be removed from the
network and a hard reset performed.
Use the following procedure to perform a sensor
hard reset.
1. Press and hold both the beacon and reset
buttons simultaneously for 10 seconds.
2. Release only the reset button.
3. After two seconds release the beacon button.
After performing the hard reset, the wireless sensor
can be added to any other rooftop unit group or
added back to same the rooftop unit network.
20
Repeater (21L09)
The wireless repeater can only be powered by an
external 24VAC power source.
NOTE: Wireless Repeaters are only compatible
with the CORE (M4) Unit Controller.
IMPORTANT
It is recommended to add the repeaters
after adding the wireless sensors. It is highly
recommended adding the repeaters at the roof-
top unit before installation in desired locations.
To join the wireless repeater to the rooftop unit BLE
mesh network, the following is required.
Using the CORE Service App, and go to the RTU
Menu > Network Integration > Wireless Sensor
Network Setup > Wireless Sensor Network >
Provision Sensor Network > Network Nodes.
1. Click Add Node on the Network Nodes
screen. This triggers the CORE Service App
to scan Bluetooth Low Energy (BLE) mesh
beaconing.
2. Press and hold the Beacon button on the
wireless repeater for two seconds.
3. The user should be able to see the MAC ad-
dress of wireless repeater on the CORE Ser-
vice app.
NOTE: The wireless repeater MAC address can
be veried with the label on the repeater.
4. Verify the CORE Service app displays the
“Node Added” on the Sensor Network.
RESET button
BEACON enable button
CAPTIVE screw
SIGNAL strength LED
Figure 7. Wireless Repeater Buttons,
Indicators and Terminals
This manual suits for next models
4
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