Lennox iComfort S30 Assembly instructions

iComfort®S30
Ultra Smart Thermostat
Installation and Setup Guide 507536-05 5/2018
Supersedes 507536-04
2018©Lennox Industries Inc.
Dallas, Texas, USA

2
Table of Contents
Shipping and Packing List........................................................................ 3
Operating and Storage Environment, Electrical and Dimensions........ 3
Installation Recommendations ................................................................ 3
Smart Hub Installation, External Components, LEDs and Terminals... 3
Installation .............................................................................................. 3
External Components ............................................................................. 4
Push Button Functions ........................................................................... 4
LED Indicators ........................................................................................ 5
Terminals ................................................................................................ 5
Mag-Mount LED and Installation.............................................................. 5
Installation .............................................................................................. 5
LED Indicators ........................................................................................ 6
HD Display Components and Installation ............................................... 7
Installation .............................................................................................. 7
External Components ............................................................................. 8
Connecting Low Voltage Wiring............................................................... 8
Control Wiring Requirements.................................................................. 8
Discharge Air Temperature Sensor (DATS)............................................ 8
Outdoor Air Temperature Sensor (OATS) .............................................. 8
Reducing Electrical Noise on Communication Bus - Indoor,
outdoor, S30 Smart Hub and Optional PureAir S................................... 8
Wiring Diagrams ................................................................................... 10
Electric Heat Conguration for iComfort Air Handlers ........................ 15
Commissioning and Service (Using the Mobile Setup Application)... 15
Mobile Device Operating System Requirements.................................. 15
Establishing a Direct Wireless Connection to the Smart Hub............... 16
Service.................................................................................................. 16
Alternative Method................................................................................ 17
Multiple Smart Hubs ............................................................................. 17
Restarting Smart Hub ........................................................................... 17
Commissioning (Using the HD Display)................................................ 17
Boot-up Screen..................................................................................... 17
Low Battery Status ............................................................................... 17
Apple HomeKit Wi-Fi Accessory Conguration .................................... 18
Dealer Info and Language Selection .................................................... 18
Warning Screen.................................................................................... 18
General Information.............................................................................. 18
Equipment Found Screen..................................................................... 18
Non-Communicating Equipment........................................................... 18
Reminders ............................................................................................ 19
iHarmony Zoning .................................................................................. 19
Commissioning Completion.................................................................. 19
Dealer Control Center ............................................................................. 20
Equipment Parameters......................................................................... 21
Tests ..................................................................................................... 38
Diagnostics ........................................................................................... 38
Installation Report................................................................................. 38
Information............................................................................................ 38
Dehumidication Settings ...................................................................... 39
Dehumidication Setting Options ......................................................... 39
Overcooling .......................................................................................... 39
Dehumidication Set Point ................................................................... 39
Advanced Dehumidication Descriptions ............................................. 39
Displaying Outdoor Temperature (Sensor) and Indoor Humidity
on the Home Screen................................................................................ 41
Displaying the Outdoor Sensor Temperature on the Home Screen ..... 41
Displaying the Indoor Humidity on the Home Screen........................... 41
System Congurations ........................................................................... 41
Complete iComfort Systems — Furnace and Air Conditioner .............. 41
Complete iComfort Systems — Furnace and HP Unit
(Dual-Fuel)............................................................................................ 42
Complete iComfort Systems — Air Handler and Air Conditioner.......... 42
Complete iComfort Systems — Air Handler and Heat Pump Unit ........ 43
Partial iComfort System — iComfort Furnace and Lennox
Conventional Air Conditioner ................................................................ 43
Partial iComfort System — iComfort Furnace and Lennox
Conventional Heat Pump Unit (Dual-Fuel) ........................................... 44
Partial iComfort System — iComfort Air Handler and Lennox
Conventional Air Conditioner ................................................................ 44
Partial iComfort System — iComfort Air Handler and Lennox
Conventional Heat Pump Unit .............................................................. 45
Partial iComfort System — iComfort Equipment Interface Module....... 45
G71MPP or SLP98 Furnace Setting Adjustments................................. 46
Wi-Fi Connection ..................................................................................... 46
Performance Reports.............................................................................. 47
Replacement Parts .................................................................................. 48
Replacement Indoor and Outdoor Communicating Controls ............. 48
Mobile Applications................................................................................. 48
Notications (Alert Codes) ..................................................................... 48

3
Alert Code Types .................................................................................. 48
Soft Disable .......................................................................................... 49
Installation Checklist............................................................................... 75
Electrical Troubleshooting ..................................................................... 76
Overview............................................................................................... 76
Denitions............................................................................................. 76
Testing .................................................................................................. 76
Index ......................................................................................................... 78
Shipping and Packing List
Quantity Description
1 iComfort S30 ultra smart thermostat includes a Smart Hub, HD Display, Mag-
Mount and optional use wall plate.
4 Mounting screws (#6 X 1.25” pan head)
4Wall anchors (alligator anged solid wall anchors)
1 Installation and setup guide
1 User guide
1Warranty certicate
NOTE: Due to Lennox’ ongoing commitment to quality, features and options
are subject to change without notice and without incurring liability.
Improper installation, adjustment, alteration, service or maintenance
can cause property damage or personal injury. Installation and service
must be performed by a qualied installer and servicing agency.
Operating and Storage Environment, Electrical and Dimensions
• Operating Temperature is -40°F to 175°F (-40 to 79°C)
• Shipping and storage temperature range is -40°F to 185°F (-40°C to 85°C)
• Operating humidity range is 10% to 90% non-condensing at 104°F (40°C)
• Storage humidity range is 5% to 95% non-condensing at 104°F (40°C)
• S30 Smart Hub Power Input: 24VAC, 1AMP at 60Hz.
• S30 Smart Hub DC Power Output: 12VDC (to Mag-Mount/HD Display)
• Dimensions (H x W x D):
» Mag-Mount: 3-1/4” x 3-1/4” x 1/2” (83 x 83 x 13 mm)
» HD Display: 5” x 7-1/2” x 1” (127 x 19 x 25 mm)
»S30 Smart Hub: 4-1/2 x 4-/2 x 1-1/2” (114 x 114 x 38 mm) - antenna
length is 7-1/4” (184 mm)
Installation Recommendations
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 a service agency.
WARNING
This product contains a chemical known to the State of California to cause
cancer, birth defects, or other reproductive harm.
Before beginning installation, note the type of equipment, number of stages,
and any accessories being installed.
Do
• Read this entire document, noting which procedures pertain to your specic
equipment and system requirements.
• Make sure that all wiring conforms to local and national building and electrical
codes and ordinances.
Do Not
• Install on voltages higher than 30VAC.
• Short (jumper) across terminals on the gas valve or at the system controls to
test installation. This will damage the thermostat and void the warranty.
• Exceed 300 feet (91 meters) run when using 18 #AWG thermostat wire or
larger.
• Allow power load from any thermostat connection to be more than 1 AMP.
Smart Hub Installation, External Components, LEDs and Terminals
InstallatIon
1. Things to consider when installing the Smart Hub:
• Install near the indoor unit such that there is a direct path to the
approximate location of the home Wi-Fi access point (the signal is not
blocked by the indoor unit or duct work, for example).
• Can be attached to a vertical surface such as a wall stud or roof truss
web, or to a horizontal surface such as a oor or ceiling joist, or a roof
rafter.
• Smart Hub antenna should be positioned such that it is roughly vertical,
no matter the orientation of the Smart Hub, itself.
• Do not install the Smart Hub on the indoor unit, duct work, or other
equipment that could induce vibration in the Smart Hub

4
• Do not install the Smart Hub on or near large metal objects. This could
adversely affect the range and directional coverage of the Smart Hub
Wi-Fi signal.
• If the Smart Hub MUST be installed on a metal object, orientate the
antenna perpendicular to the metal surface.
• In all cases, the Smart Hub antenna orientation may need to be
adjusted to obtain best Wi-Fi results.
2. Use the following procedure outlined in “Figure 1. Smart Hub Installation”
to install the Smart Hub controller.
1/4”
STRIP 1/4” INSULATION FROM
END OF EACH CONTROL WIRE
A
B
D
USE SMART HUB AS TEMPLATE TO MARK DESIRED MOUNTING
LOCATIONS ON WALL OR STUD.
CAUTION: DO NOT OVERTIGHTEN LOWER MOUNTING SCREW, MAY
DAMAGE SMART HUB.
SECURE SMART-HUB TO
WALL WITH
FIELD-PROVIDED
FASTENERS
RAER
TNORF
KEYHOLE
THROUGH-HOLE
C
MAKE CONNECTIONS TO SMART HUB
USING WIRING DIAGRAMS PROVIDED
PUSH SPRING-LOADED LEVER IN AND
INSERT WIRE THROUGH
HOLE LOCATED ON
BOTTOM SIDE OF
CONNECTOR. RELEASE
LEVER TO SECURE WIRE.
SMART HUB WIRE
CONNECTORS
18-GAUGE THERMOSTAT WIRE
Figure 1. Smart Hub Installation
3. For low voltage wiring connections use diagrams in section titled
“Connecting Low Voltage Wiring” on page 8.
ExtErnal ComponEnts
System Status LED
System Commissioning
Status LED
USB Port
Dealer commissioning and
manual reboot button
T
erminal Connection Access Cover
Antenna
Figure 2. Smart Hub Indicators and External Components
push Button FunCtIons
The Smart Hub push button switch has two primarily functions.
• Rebooting: Press and hold the button for ve seconds to reboot the Smart
Hub.
• Commissioning: Quickly press and release the button to start the process
of creating a direct network connection between the Smart Hub and mobile
device running the iComfort Mobile Setup application.

5
The push button has a LED associated with it that indicates the status of the
Smart Hub commissioning state (see “Table 1. LED Indicators”).
lED InDICators
Table 1. LED Indicators
System Status LED
LED Color Status Description
Green System is nor-
mal
A solid green LED indicates no system errors are detected.
System operating as designed.
Red HVAC Fault System has critical alert which needs attention.
Amber Wi-Fi Error
Blinking amber LED indicates either Wi-Fi is not connected,
no Wi-Fi is within range, or and Wi-Fi hardware error. Could
also indicate intermittent Wi-Fi connection.
Magenta Thermostat Error Blinking magenta LED indicates either Mag-Mount or HD
display not connected.
Cyan HVAC Error Indoor unit is not connected or unable to communicate.
Commissioning Status LED
Blue System is
normal
No mobile device is directly connected using Wi-Fi to the
Smart Hub.
Green Blinking green LED indicates the commissioning button has been activated and
the Smart Hub is waiting for a connection with a mobile device.
Green A solid green LED indicates a mobile device is connected to the Smart Hub.
• If multiple errors are present, the system status LED will display each active error for one
second on and one second off and then display the next error if present.
• The system will continue to cycle through all active errors.
• System status errors are displayed in the following priority: HVAC , thermostat and then Wi-Fi.
tErmInals
Table 2. Terminal Designations
Terminal Designation Description Terminal Color
R24VAC input Red
I+ RSBUS I+ Yellow
I- RSBUS I- Green
C24VAC return Black
ACC1* Accessory 1 and 2 (FOR
FUTURE USE)
Orange
ACC2* White
+12VDC output Blue
-12VDC return Black
ACommunications bus A Yellow
Table 2. Terminal Designations
Terminal Designation Description Terminal Color
BCommunications bus B Green
* ACC1 and ACC2 are for future use. DO NOT USE.
Mag-Mount LED and Installation
CAUTION
Magnets located in this product have far-reaching and strong magnetic elds.
They could damage TVs and laptops, computer hard drives, credit and ATM
cards, data storage media, mechanical watches, hearing aids and speakers.
Keep HD Display and Mag-Mount away from devices and objects that could
be damaged by strong magnetic elds.
InstallatIon
A
ccess Cover
Mag-Mount without
access cover installed.
Wall Plate
(Use is optional)
Use the following procedure for installation of the Mag-Mount where existing
thermostat wiring does not exist:
1. Unpack the HD Display and Mag-Mount (wall base).
2. Determine the best location to install Mag-Mount. Ideal location should be
located away from outside wall, direct sunlight or discharge air vents.
3. Cut or drill a small hole for thermostat wiring.
3/8” (10 mm)
Diameter Hole
4. Pull about three inches of thermostat wire through the opening and remove
the outer thermostat wire jacket.

6
Seal wire hole in wall to prevent
cold or hot air from affecting temperature
sensor in display.
IMPORTANT
Seal wire hole in wall to prevent cold or hot air from affecting temperature
sensor in HD Display.
5. Strip 1/4” (7 mm) insulation from end of each wire.
1/4”
6. Use a level to align either the mag-mount or wall plate on wall horizontally.
7. Remove cover from mag-mount by inserting a at-head screwdriver into
the slot on each side of the mag-mount. Give it a gentle twist to separate
the two sections.
Slot
Slot
8. Use Mag-Mount as a template to mark the desired mounting hole locations
on the wall.
Use either the Mag-Mount or wall
plate as a template to mark the
desired mounting hole locations
on the wall.
9. Drill 3/16” (5 mm) holes at marked locations on the wall for anchors. Then
insert wall anchors into holes until ush with the wall.
Drill Holes Insert in hole until flush with wall.
WARNING
DO NOT over-tighten mounting screws. Doing so my distort the mag-mount
plastic housing and cause connection issues when installed the HD display.
10. Secure mag-mount to wall or through wall-plate to wall with provided #6 x
1.25” pan-head screws (4).
11. Connect thermostat wiring to Mag-Mount terminals referencing provided
wiring diagrams in this guide.
12. Reinstall access cover.
NOTE: Verify that the Mag-Mount access cover is reinstalled correctly to the
Mag-Mount base. The access cover must be ush with the base or
could cause power or communication issues.
lED InDICators
1. A blue LED is visible on the front of the Mag-Mount when it is connected,
power applied, and the HD Display has not been installed (see following
illustration). The blue LED is also visible through the top vent of the Mag-
Mount near the top-left corner when the HD Display is installed.

7
System Status LED
System Commissioning
Status LED
Mag-Mount
COMM
A
BUS
B
12VDC
+ -
Blue LED Location
Smart Hub
Table 3. Communication Error Troubleshooting
(Mag-Mount to Smart Hub)
Possible Connection Issues
Mag-Mount
LED Condition
(HD Display
Removed)
S30 Smart
Hub - System
Status LED
One communication wire at either the Mag-
Mount or Smart Hub COMM BUS A or B termi-
nals is disconnected.
Steady Blue Flashing Magenta
LED
Both communication wires – at either the Mag-
Mount or Smart Hub COMM BUS A or B are
disconnected.
Flashing Blue Flashing Magenta
LED
Both communication wires – at either the
Mag-Mount or Smart Hub COMM BUS A or B
terminals are reversed.
Flashing Blue Flashing Magenta
LED
Power wires at either the Smart Hub or Mag-
Mount 12VDC + and - terminals are disconnect-
ed.
Off Flashing Magenta
LED.
If terminals are connected correctly, then check
HD Display mounting to Mag-Mount. HD Display
may not be secured correctly to Mag-Mount.
LED not visible
when HD Display is
installed.
Flashing Magenta
LED.
HD Display screen
may be either blank
or a message indicat-
ing iComfort cannot
communicate with the
equipment.
HD Display Components and Installation
InstallatIon
1. Hold the HD Display by the edges, line it up with the Mag-Mount (horizontal
position), and move the HD Display toward the Mag-Mount.
2. When the magnets in the Mag-Mount attract the HD Display, guide it toward
the Mag-Mount and let the magnets pull it into place.
3. Lightly press on the sides of the HD Display to verify it is completely seated
on the Mag-Mount.
4. To remove the HD Display from the Mag-Mount, rotate the HD Display right
or left (clockwise or counter-clockwise) at least 30 degrees to disengage
the plastic hooks and then pull it straight off of the Mag-Mount
WARNING
Failure to rotate the HD Display before pulling it off of the Mag-Mount may
loosen the dry wall anchors or pull the Mag-Mount off of the wall due to the
increased forced required to separate the HD Display from the Mag-Mount
when it is not rotated.
NOTE: If the HD Display is removed from the Mag-Mount base, the HD Display
will shut down and will not be able to communicate with the system.
System can be controlled from mobile devices or consumer/dealer web
portals once registration has been completed.
5. Do not remove the label covering the HD Display screen until after power
is applied to the system.
CAUTION
1) Battery may need to charge before operation. Once the display
is connected, instructions may appear within 15 seconds with
further detail.
2) TO AVOID BREAKING THE GLASS DISPLAY
a. Do not apply force directly to the glass display
b. Holding the display horizontally
i. Center the display cavity on the base
ii. Press both sides equally until the snaps engage
3) AVOID EXCESSIVE FORCE TO THE CLASS DISPLAY

8
ExtErnal ComponEnts
• Proximity sensor - Detects a person approaching the HD Display. If the
HD Display is in Screen Saver mode and the Proximity Sensor setting is
enabled, the proximity sensor takes the HD Display out of screen saver mode
automatically and returns to the home screen when someone approaches.
• Power button - Turns off the HD Display when pressed and held for about
ve (5) seconds.
• microSD card slot - Not functional, for future use.
• Micro USB connector - Not functional, for future use.
Proximity Sensor
Power Button
microSD Slot
Micro USB Connector
Figure 3. HD Display Components
Connecting Low Voltage Wiring
The following diagrams in this section illustrates the basic Lennox control wiring
for all compatible components.
Control WIrIng rEquIrEmEnts
The following is the wiring specication requirements for installation of this
system.
• iComfort wiring size is 18 #AWG.
• Thermostat does not required shielded cable wiring.
• Maximum total length of all connections combined is 1500 feet (457 meters).
• Maximum length between components is 300 feet (90 meters).
DIsChargE aIr tEmpEraturE sEnsor (Dats)
Installation of discharge air temperature sensor (DATS) (88K38) must comply
with the following requirements:
• Installed downstream of the heat exchanger or electric heat elements.
• It must be placed in free airow, where other accessories (such as humidiers,
UV lights, etc.) will not interfere with its accuracy.
• Wiring distance between the integrated furnace and air handler controls or
damper control module and the discharge air sensor must not exceed 10 feet
(3 meters) when wired with 18 #AWG thermostat wire.
• DATS is highly recommended for all systems that include a modulating
outdoor unit in order to provided more precise dehumidication operation.
outDoor aIr tEmpEraturE sEnsor (oats)
The optional outdoor air (temperature) sensor (OAS) (X2658) wiring distance
to the iComfort S30 should not exceed 150 feet (45 meters) when wired with
minimum 22 #AWG (recommend 18 #AWG) dedicated 2-conductor thermostat
cable. Installation of OAS must comply with the following requirements:
• Sensor wiring must be run to avoid touching or being close to high voltage
wiring and light ballast.
• Choose a protected outdoor location away from direct sunlight or other heat
sources (usually on the north side of the building).
• Ensure that water will neither collect on, nor wash over the sensor.
• Do not locate the sensor near driveways or similar heat-absorbing masses
which may reect stored heat energy onto the sensor and send inaccurate
information to the thermostat.
• Locate the sensor away from attic and soft vents, or furnace venting pipes.
• Do not locate the sensor directly above an air conditioner or heat pump.
rEDuCIng ElECtrICal noIsE on CommunICatIon Bus - InDoor, outDoor, s30 smart
huB anD optIonal purEaIr S.
Communicating systems requires four thermostat wires between the Mag-
Mount and Smart Hub. Four wires are also used between the Smart Hub and
indoor/outdoor units as well. When a thermostat cable with more than four
wires is used, the extra wires must be properly connected to avoid electrical
noise. The wires must not be left disconnected.
• Use wire nuts to bundle the unused wires at each end of the cable. A single
wire should then be connected to the indoor unit end of the wire bundle
and attached to the “C” terminals as shown in “Figure 4. Thermostat Wire
Termination in Communicating Systems (Electrical Noise)”.
• Keep all communication wiring as far away from the house electrical wiring
and large electrical appliances as possible. Recommended minimal distance
is 15 feet (5 meters).

9
Unused wires
Unused wires
12VDC
+ -
COMBUS
A B
12VDC
+ - COMBUS
A B
Single wire
to bundle
wire to indoor
terminal “C”.
Single wire
to indoor unit
terminal “C”.
Unused wires
Single wire
to terminal “C”.
Indoor Unit Controller
Outdoor Unit
Smart Hub
Mag-Mount
R i+ I- C
Figure 4. Thermostat Wire Termination in Communicating Systems (Electrical Noise)
Unused wires
Single wire
to terminal “C”.
Indoor Unit Controller
PureAir S
Figure 5. Thermostat Wire Termination in Communicating Systems (Electrical Noise) - Optional PureAir S

10
WIrIng DIagrams
The following diagrams are typical low voltage wiring connections for various
system congurations.
iComfort Indoor Unit
S30 Smart Hub
C
i+
i-
R
S30
Mag-Mount
12VDC
+ -
COM
BUS
A B
COM
BUS
B A
12VDC
- +
ACC1 ACC2
iComfort Outdoor Unit
OATS (Optional)
DATS (Optional)
Figure 6. iComfort System
24VAC 1- or 2-Stage
Heat Pump
iComfort
Air Handler
SETUP NOTES:
CUT Y1-Y2 ON-BOARD
MUNICATING)
CUT R-O ON-BOARD LINK
FOR OUTDOOR HEAT
MUNICATING)
COM
BUS
B A
12VDC
- +
12VDC
+ -
COM
BUS
A B
S30
Mag-Mount S30 Smart
Hub
ACC1 ACC2
DATS (Optional)
OATS (Optional)
Figure 7. iComfort System with Non-Communicating Heat Pump
24VAC Outdoor Unit
(1 - or 2-Stage Air Conditioner)
SETUP NOTE:
CUT Y1-Y2 ON-BOARD LINK FOR
2-STAGE OUTDOOR UNITS
(NON-COMMUNICATING)
COM
BUS
B A
12VDC
- +
12VDC
+ -
COM
BUS
A B
S30 Smart-Hub
S30
Mag-Mount
ACC1 ACC2
iComfort Indoor Unit
DATS (Optional)
OATS (Optional)
Figure 8. iComfort System with Non-Communicating Air Conditioner
24VAC 1- or 2-Stage
Indoor Unit
EIM
iComfort
Outdoor Unit
COM
BUS
B A
12VDC
- +
12VDC
+ -
COM
BUS
A B
S30
Mag-Mount
S30 Smart Hub
If jumber is present between
R and W2 on indoor unit terminals then
removed it. Installed jumper
may cause erroneous Alert Code 125.
ACC1 ACC2
Figure 9. iComfort System with Equipment Interface Module,
Non-Communicating Indoor Unit and Communicating Outdoor Unit

11
DATS
(Required)
OATS (Optional)
IN-ZONE
THERMOSTATS
PWR
D+
D-
C
PWR
D+
D-
C
PWR
D+
D-
C
See iHarmony Installation instruction for damper connection information.
INDOOR
DOOR” ON DAMPER CONTROL MODULE TO
CONNECT TO THE INDOOR UNIT.
PWR
D+
D-
C
iComfort Indoor
Unit
TSTAT
IHARMONY ZONING
SYSTEM
To Smart
Hub
To indoor unit
To iHarmony
If unable to connect two wires
to indoor unit terminals then
pigtail wiring as exampled
here.
COM
BUS
B A
12VDC
- +
12VDC
+ -
COM
BUS
A B
S30 Smart Hub
S30
Mag-Mount
DATS
UP TO THREE
IN-ZONE
THERMOSTATS
ARE SUPPORTED
ACC1 ACC2
iComfort
Outdoor
Unit
Figure 10. iComfort System with iHarmony Zoning System

12
+- AB ODT
FLOAT
Switch
DH DH
Gh Rf Cf Gs YW
HVAC EQUIP.
DH
C
G
R
NC NO
NC
NO
SPDT RELAY
f
CsGh
G W
fR
HVAC EQUIP
DH NC
AUXILIARY DEHUMIDIFIER MODELS HCWHD-090
AND HCWHD-135
NOTE: HCWHD-065 IS NOT COMPATIBLE
AUXILIARY DEHUMIDIFIER MODELS HCWHD3-070 AND HCWHD-095
཰ི
ཱ
ཱི
ICOMFORT
INDOOR
UNIT
12VDC
- +
12VDC
+ -
COM
BUS
B A
COM
BUS
A B
ICOMFORT
INDOOR
UNIT
COM
BUS
B A
12VDC
- +
12VDC
+ -
COM
BUS
A B
S30 MAG
MOUNT
S30 SMART
HUB
AUXILIARY
DEHUMIDIFIER
S30 SMART
HUB
S30 MAG
MOUNT
ACC1 ACC2
Figure 11. iComfort System with Auxiliary Dehumidier Accessory

13
SLP98 & G71MPP FURNACE (IFC) OR AIR
HANDLER (AHC) NOTE: 24V UV LIGHT APPLICATIONS
IN AN ICOMFORT
®
SYSTEM, NEITHER FURNACE NOR AIR HANDLER
CATIONS. AN ADDITIONAL TRANSFORMER FOR UV LIGHT APPLICATIONS IS
REQUIRED. UV LIGHT WIRING CONNECTIONS ARE INDEPENDENT OF HVAC
SYSTEM OPERATION; SEE UV LIGHT INSTALLATION INSTRUCTIONS.
NOTE: ICOMFORT
®
SENSES HUMIDITY & CONTROLS 24V “H” OUTPUT (&
120V “H” OUTPUT) TO CYCLE HUMIDIFIER BASED ON DEMAND. NO OTHER
CONTROL OR HUMIDISTAT REQUIRED.
OPTIONAL OUTDOOR AIR SENSOR FOR USE WITH HUMIDIFIER (IF NOT
FORT OUTDOOR UNITS). (SEE OAS NOTES)
SL280, EL296 FURNACE
48G96 Relay
GND
IN
ICOMFORT
®
OUTDOOR UNIT
SMART HUB
FOR SL280 & EL296, SEE HUMIDIFIER DIAGRAM BELOW
(BOTTOM RIGHT)
120VAC<-------HUMIDIFIER CONNECTIONS------> 24VAC
SMART
HUB
CHARGE AIR SENSOR
(SEE DAS NOTES)
OPTIONAL OUTDOOR
AIR SENSOR (SEE OAS
NOTES)
A
i+
B
-
A
i+
B
-
HD
DISPLAY
Mag-Mount
12VDC
+ -
COM
BUS
A B
12VDC
- +
COM
BUS
B A
ERV/HRV 3 AND 5
ACC1 ACC2
Figure 12. iComfort System with Humidier Accessory

14
LVCS VENTILATION CONTROL
SYSTEM
26L56 CURRENT SENSING RELAY
KIT.
NOTE: PASS THE BLOWER MOTOR
L1 WIRE THROUGH THE
RENT SENSING RELAY AS SHOWN.
SLP98 & G71MPP FURNACE
(IFC) OR AIR HANDLER (AHC)
LVCS. SET CYCLE TIME TO 1 HOUR; SET VENTILATION TIME TO 60 MINUTES.
NOTE: USE THE ICOMFORT®S30 CIRCULATE FAN PERCENTAGE OF ON TIME TO CONTROL VENTILATION TIME.
SMART HUB
Mag-Mount
12
VDC
- +
COM
BUS
B A
12
VDC
+ -
COM
BUS
A B
ICOMFORT
FURNACE OR AIR
HANDLER
HEPA BYPASS FILTER X2680 HEPA
INTERLOCK KIT
TOR COMMON WIRE
THROUGH CURRENT LOOP.
SEE HEPA INTERLOCK KIT
FOR INSTALLAT ION DETAILS
ICOMFORT
OUTDOOR AIR
CONDITIONING
OR HEAT PUMP
STANDARD 1 OR 2 STAGE
AC OR HP UNIT
ICOMFORT
FURNACE OR
AIR HANDLER
ICOMFORT
FURNACE OR AIR
HANDLER
(POWER COMPANY INTERRUPTION
SYSTEMS ARE WIRED SAME AS
OVERFLOW SWITCH)
ICOMFORT
2-STAGE
FURNACE
CUT
R-DS
W914
DS
R
HVAC HEAT OR COOL CALL, OR THE FAN IS IN CONTINUOUS
OPERATION, THE VENTILATION CONTROLLER WILL OPEN OA
DAMPER TO VENTILATE IF THE OUTDOOR TEMPERATURE AND
TION CONTROLLER.
ACC1 ACC2
Figure 13. Optional Accessories

15
Electric Heat Conguration for iComfort Air Handlers
IMPORTANT
Prior to running the thermostat installer setup, electric heat must be manually
congured.
IMPORTANT
After electric heat strips are installed, the air handler control must be manually
congured to detect the number of electric heat sections. (See 506181-01 for
complete conguration guide.
OUTDOOR
AIR SENSOR
HEAT
1234
COOL
1234
DELAY
12 34
ADJUST
NORM + −
HUMIDIFICATION
SMART AUTO
EVENHEAT
1234
BLOWER
ONLY CFM
100 11 5 130
85
Y1−Y2 2−STAGE COMPR R−O HEAT PUMP R−DS DEHUM
OR
C
W1
W2
G
Y2
Y1
C
R
DH
H
L
O
DS
W3
FUSE3AMP
XFMR 24V
24 VAC
COM
3
6
9
1
4
7
XFMR LINE
G
2
5
8
P8
L1
L2
L2 L1 INDOOR
BLOWER
POWER
EARTH
INDOOR BLOWER
SIGNAL
45 6
12 3
A92
INTEGRATED
CONTROL
OUTDOOR UNIT
LINK
I + I −
I +I−RC
I +I−RC
THERMOSTAT
HUMIDITROL
DH
DISCHARGE
AIR SENSOR
HARMONY
PUSHBUTTON LED
Figure 14. Air Handler Control
This procedure is applicable only to the CBX32MV-XX-230-6-06 and higher
and all CBX40UHV models. This procedure is for conguring the heat strips so
that they will be detected by the thermostat:
• Power must be applied to the air handler but NOT to the Smart Hub.
• Disconnect any communication wiring between the Smart Hub and indoor
unit prior to electric heat discovery.
• The air handler control must be in idle mode (decimal blinks at 1 Hertz—0.5
second ON, 0.5 second OFF to use the following procedure.
1. Select eld test mode—press and hold the push button until solid “–”
appears; release button. Display will blink.
2. Push and hold button and wait for the display LED to show “H” (capital H),
then release the button.
3. The air handler control cycles the indoor blower motor “on” to the selected
heat speed and stages the electric heat relays “on” and “off” to automatically
detect the number of electric heat sections. The air handler control stores
the number of electric heat sections, then automatically exits “Field Test
Mode”.
4. The thermostat will now detect the heat strip information stored in the air
handler control.
5. Turn off power and connect all low voltage wiring (power and communication
to and from the Smart Hub).
6. After completing the commissioning of the system then check to see if you
have electric heat or emergency heat.
Commissioning and Service (Using the Mobile Setup Application)
This application tool is used by dealers to commission a iComfort S30 ultra
smart thermostat using a Wi-Fi enabled mobile device.
A temporary Smart Hub local network provides a means for a mobile device
using the iComfort Mobile Setup application to directly communicate with the
Smart Hub.
NOTE: The iComfort Mobile Setup application running on a mobile device
cannot connect to the Smart Hub through the Internet or home Wi-Fi
network.
To use the iComfort Mobile Setup app, the mobile device must be:
• Wi-Fi capable
• Located in the home near the Smart Hub
NOTE: A router with Bonjour capabilities is required for this function. Check the
router features if the Smart Hub does not connect. Apple Bonjour®is an
implementation of Zero-conguration networking (Zeroconf), a group
of technologies that includes service discovery, address assignment,
and host name resolution.
moBIlE DEvICE opEratIng systEm rEquIrEmEnts
The iComfort Mobile Setup application is available for both IOS 6.0 and higher
(App Store) and Android 4.1 and higher (Google Play).

16
EstaBlIshIng aDIrECt WIrElEss ConnECtIon to thE smart huB
IMPORTANT
If the connection between the iComfort Mobile Setup application and Smart
Hub is idle for three (3) minutes, the Smart Hub will auto-disconnect from the
mobile device. Repeat procedures to reconnect.
1. Download and install the iComfort Mobile Setup application.
NOTE: It is recommend that when using the iComfort Mobile Setup application
to commission the system, remove the HD Display from the Mag-
Mount before starting. Once commissioning is completed, reattach the
HD Display to the Mag-Mount.
2. Go to the Smart Hub and press the commissioning button located on
the side of the unit (see “Figure 2. Smart Hub Indicators and External
Components” on page 4 for location of button).
3. The commissioning status LED will start blinking green for two minutes.
During this time the Smart Hub will broadcast its Wi-Fi identier (SSID).
4. Go to your mobile device’s Wi-Fi connection tool and locate the Smart
Hub Wi-Fi broadcast identier. A typical example of a identier (SSID) is
DIRECT-XY12-3456.
NOTE: Refer to your mobile device’s owners manual on how to use your Wi-Fi
Connection tool.
5. Connect to the Smart Hub by using the last eight digits of the Smart Hub
SSID as the password. In this example, it would be XY123456).
6. Once the mobile device is connected to the Smart Hub, the commissioning
Status LED will turn solid green.
7. Start the iComfort Mobile Setup application and make sure you are
connected to the correct Smart Hub by checking the serial number.
8. Touch the remote-in tab on the iComfort Mobile Setup application home
screen. This will take you to the commissioning screen.
9. You can use the information provided in “Commissioning (Using the HD
Display)” on page 17 to complete the commissioning process using the
iComfort Mobile Setup application.
10. If the system has not been commissioned it will go to commissioning screen
automatically. If the system has already been commissioned it will go to
dealer control center.
11. Once the commissioning is completed, exit the iComfort Mobile Setup
application.
12. Go to the mobile device’s Wi-Fi tool and manually disconnect from the
Smart Hub.
13. Once disconnected, the Smart Hub commissioning LED will change to
solid blue.
14. Reinstall the HD Display on the Mag-Mount.
sErvICE
To use iComfort Mobile Setup application as a service tool, the commissioning
of the system must have already been completed.
1. Download and install the iComfort Mobile Setup application if not already
installed.
2. Go to the Smart Hub and press the commissioning button once.
3. The LED will start blinking green for two minutes. During this time the Smart
Hub will broadcast its Wi-Fi identier (SSID).
4. If this is the rst time connecting to the target Smart Hub then go to your
mobile device’s Wi-Fi connection tool and locate the Smart Hub Wi-Fi
broadcast identier. A typical example of a identier (SSID) is DIRECT-
XY12-3456.
5. If your mobile device had already connected previously to the target Smart
Hub, then touch the applicable Smart Hub SSID on the list and skip to step
7.
NOTE: Refer to your mobile device’s owners manual on how to use our Wi-Fi
Connection tool.
6. Connect to the Smart Hub by using the last eight digits of the Smart Hub
SSID as the password (XY123456) for example.
7. Once connected to the mobile device the Smart Hub commissioning LED
will turn solid green.
8. Start the iComfort Mobile Setup application and make sure you are
connected to the correct Smart Hub by checking the serial number.
9. Touch the remote-in tab on the iComfort Mobile Setup application home
screen.
10. If the system has not been commissioned it will launch the commissioning
screen. If the system has already been commissioned it will go to dealer
control center.
11. Once servicing is completed, exit the iComfort Mobile Setup application.
12. Go to the mobile device’s Wi-Fi tool and manually disconnect from the
Smart Hub.
13. Once disconnected the Smart Hub LED will change to a solid blue.

17
altErnatIvE mEthoD
From the home screen, go to menu > settings > advanced settings > pair
Smart Hub to iComfort dealer mobile application selection. It will auto connect
to dealer application and start you at the dealer control center screen. The
following screen will appear and show the status of the connection. Once
connected the screen will automatically disappear.
view dealer dashboard
restart
pair Smart Hub to icomfort dealer mobile app
advanced settings
wi- local
smart away on
o
auto
Feels Like
fan
heat & cool
humidity
iHarmony zoning
notications
general
display
account
settings
home info
advanced settin
gs
wi-
lo
c
a
l
s
mar
t
a
Feels
L
f
an
h
eat &
h
umid
i
Harm
o
noti

c
a
gener
a
d
ispla
y
a
cc
ou
nt
s
ett
i
ngs
h
ome inf
o
i
vi
ew
d
d
e
a
l
le
r
d
da
h
sh
b
bo
a
r
d
d
aw
w
ay
y
L
i
ke
e
c
o
oo
o
l
i
ty
y
o
ny
y
z
o
on
a
t
i
io
n
s
al
y
Connect to the Smart Hub from
the dealer iComfort mobile app
now broadcasting...
stop
Figure 15. Pairing
multIplE smart huBs
Multiple Smart Hubs in a home can be assigned to a group (up to nine groups
with up to eight (8) Smart Hubs in each group). All Smart Hubs in a group can
communicate with other Smart Hubs in the same group over the home Wi-Fi
network.
Default Group ID is 1. Range is 0 to 9.
For example, seven Smart Hubs in a home can be divided up for example as 1
in Group 1 and six in Group 2 or 4 in Group 1 and 3 in Group 2. Smart Hubs in
Group 1 will not be able to see or interact with the Smart Hubs in Group 2. This
allows the intentional isolation of the Smart Hub for the master bedroom from
the Smart Hub for the children’s area, for example.
NOTE: If a Smart Hub is set to Group 0, it will not communicate with other
Smart Hubs.
rEstartIng smart huB
Pressing the Smart Hub button for more than ve seconds will reboot the Smart
Hub.
Commissioning (Using the HD Display)
The following procedures are written for commissioning the system using the
HD display interface.
When power is rst applied to the system all iComfort devices attached to the
system (air handler or furnace, outdoor unit or zoning control) will automatically
be congured using optimal factory default settings based on system type,
capacity and other conguration considerations.
NOTE: If there is an PureAir S air purication system installed, during
commissioning the blower will turn on and run at three different CFM
settings for the PCO lter calibration to take place. This may be well in
advanced before the display is fully up and running. This is a normal
process. The blower may run as long as 90 seconds at each CFM
setting to complete the lter calibration .
Boot-up sCrEEn
When power is applied to the system, the HD Display will display a welcome
screen.
If there is an issue with communication between any components attached to
the thermostat, a critical alert message will appear on the screen. The alert
message will provide detail information concerning the possible cause. Once
the issue is corrected and power is restored to the system the rst screen in the
initial commissioning sequence will appear.
Below is an example of a communication error message.
IComfort cannot communicate with the equipment
If problem persists, please contact your iComfort dealer at
1-800-555-8888
alert
IComfort is unable to connect to the Smart Hub device
For additional support, contact Lennox at
1-800-9-LENNOX or visit www.lennox.com/support
Figure 16. Communication Error Message Example
loW BattEry status
If a critical low battery screen is displayed, the system will automatically start
charging the HD Display internal battery. On the screen the word “charging” will
appear. Once “charging” disappears (typically 3 to 10 minutes) then the display
will automatically start-up.

18
applE homEKIt WI-FIaCCEssory ConFIguratIon
A pop-up screen will appears providing instructions on how to connect the
thermostat to the home Wi-Fi network using an Apple IOS device. If you wish to
use this method to congure the unit for Wi-Fi and Apple HomeKit, then refer to
the provided user guide for additional instructions.
Otherwise, select cancel to proceed with the thermostat commissioning
procedures. There is an option to perform this task later on at the homeowners
convenience.
NOTE: This procedure can only be accomplished using a Apple IOS device.
Figure 17. IOS Wi-Fi Accessory Conguration
DEalEr InFo anD languagE sElECtIon
The rst screen in the commissioning sequence is the dealer information
screen and language selection tool. Supported languages are English, French
and Spanish. The drop-down selection tool is located in the upper right-hand
corner of the screen.
Dealer ID and/or phone number can be added. Once the system is connected
to the Internet, the remaining information will be populated automatically by the
Lennox server based on the dealer ID or phone number entered. All information
can be entered manually if desired however.
Information that can be manually entered is name, email website, dealer
address which includes address 1, address 2, city, state and zip/postal code.
Once completed touch continue.
WarnIng sCrEEn
If either the Dealer ID or phone number is NOT provided, a warning screen will
appear. The warning screen will provide information on the limitation imposed
on the system if this information is not provided. Touch no to return to the
previous screen to complete the information requested or touch yes to continue.
gEnEral InFormatIon
On this screen general information needs to be veried or changed. Touch
any item to change its contents. A pop-up screen will appear that will allow the
information to be added or changed.
1. Select country / region.
2. Select time and date which includes time, date, time zone and daylight
savings time (ON/OFF).
3. Temperature unit (Fahrenheit or Celsius).
4. Once completed touch continue.
EquIpmEnt FounD sCrEEn
This screen will display any iComfort equipment the system has detected (air
handler, furnace, outdoor unit, PureAir S, Smart Hub and iHarmony zoning
system during initial commissioning of the system.
NOTE: When a Lennox Equipment Interface Module (EIM) is used and
congured as either a furnace or air handler, then the component
would appear as either EIM-Furnace or EIM-Air Handler. When using a
EIM the outdoor unit may be either a Lennox iComfort or any standard
24VAC non-communicating unit.
NOTE: Not all equipment may be visible from the equipment found system
screen. Touch and swipe up to access additional information (if
applicable) listed at the bottom of the system box.
If non-communicating equipment needs to be added, it can be done so from
this screen.
non-CommunICatIng EquIpmEnt
When selecting the non-communicating (24VAC) equipment icon a screen will
appear listing equipment that can be added. When selecting an applicable
component, a green check will appear next to the item. The capacity selection
of the outdoor unit will also be displayed on the screen after selecting the
applicable outdoor equipment type.
NOTE: A temporary dialog box will appear indicating: Updating - Wait while we
check for dependencies.
NOTE: Selecting an outdoor unit type only appears if a iComfort outdoor unit
is not detected by the system. Selections are one or two-stage heat
pumps or air conditioners. Outdoor unit capacity will also have to be set.
Other equipment that can be added are humidiers and dehumidiers.
Once completed touch done which will display the equipment found screen.
There the additional non-communicating equipment will now be displayed
along with the iComfort equipment.
Once completed touch continue.

19
rEmInDErs
This screen allows you to set reminders as either disabled or 3, 6, 12 or 24
months and also custom by specic date. The other options on this screen is to
trigger the reminder event either by calendar or actual system run-time.
1. Reminders may be set for replace lter 1, replace lter 2, replace UV
bulb, replace humidier pad, PureAir™, PureAir Smaintenance and
maintenance reminder. Once a reminder is set for a specic item, touch
done to return to the previous screen. An “expires on date” will appear next
to the item just set.
2. Once completed touch continue.
Iharmony ZonIng
This screen will only appear if the iHarmony®zoning system is detected. This
screen allows you to rename each zone. You may use the preset names or
any custom name you may desire. If zoning is not applicable, proceed to the
next section.
1. Touch on any zone to rename it. A screen will display that list several
predened names that can be used which are master bedroom, guest
bedroom, kitchen, living room, media room, dining room, library or custom.
When a predene name is selected, a green check-mark will appear next
to the selected name.
2. When creating a custom name, touch custom, enter a name and touch
back to return to the previous screen. A new unique zone name can be
created for all four zones.
3. When completed, touch done to return to the zoning screen and verify the
new name is being used for the specic zone.
4. Once completed touch continue.
SET UP AIRFLOW PER ZONE
This screen will allow the installer to setup the airow per zone. The types of
circulation per zone are:
• Blower Circulation Airow (gray) which includes total, assigned, minimum
and maximum airow.
• Heating Circulation Airow (red) which includes total, assigned, minimum
and maximum airow.
• Cooling Circulation Airow (blue) which includes total, assigned, minimum
and maximum airow.
1. Touch on the circled green arrow to touch a specic zone. The that zone
settings will expand to allow the installer to adjust CFMs for each circulation
airow type. Use the plus and minus buttons to adjust CFMs up and down.
2. Once completed touch to continue. The next screen that will appear is the
Dealer Control Center.
CommIssIonIng ComplEtIon
Once commissioning is completed, the system will leave you at the Dealer
Control Center. You can either touch exit to go to the main screen or perform
any function listed in the various categories displayed.

20
Dealer Control Center
This menu provides access for the installer or service technician to perform various functions. Advance equipment congurations, notications, tests, diagnostics,
installation reports and general information about the system.
dealer
control center
equipment
tests
notifications
information
diagnostics
exit
Use to make changes to equipment settings and add or remove
non-communicating equipment or accessories. In addition the reset all
equipment option is available. This will allow the installer to reset all
equipment and reconfigure.
Use to display
system notifications
Use to run test on
system components
Use to run
diagnostics on
system components
Use to display
system information
Exit to Home
screen.
To navigate back to the dealer control center,
touch on the Dave Lennox icon when available
on the top left-hand side of the screen.
<
<To navigate back to the previous screen, touch
on the left arrow when available.
“Previous Screen
Name”
installation
report
Used to display installation results.
NOTE: This report is not available until after
exiting the dealer control center following the
commissioning procedure. Exit and return to
the dealer control center to view the installation
report.
Figure 18. Dealer Control Center