Lennox Icon User manual

Hardware Installation and System
Commissioning Guide
507701-03 4/2018
Supersedes 507701-02
Firmware 1.75 Release

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Table of Contents
1. Shipping and Packing List .............................................................................3
2. Required Field-Provided Part.........................................................................3
3. Operating and Storage Environment, Electrical and Dimensions..............3
4. TermsandDenitions.....................................................................................3
5. iCON System Hardware ..................................................................................6
5.1. Central Hub..............................................................................................6
5.2. Mag-Mount...............................................................................................6
5.3. Local Display (HD Display)......................................................................6
5.4. iCON Building Controller (16A50)............................................................6
6. iCON Hardware System Architecture ............................................................6
6.1. Equipment Monitoring..............................................................................6
6.2. Equipment Interfaces Supported .............................................................6
7. Central Hub Descriptions ...............................................................................6
7.1. Central Hub..............................................................................................6
7.2. Central Hub Networks..............................................................................7
7.3. Business Network....................................................................................7
7.4. Central Hub Wi-Fi Physical Network........................................................7
7.5. CentralHub↔LennoxiCONCloudServerNetwork ..............................8
7.6. CentralHubConnectiontoLennoxiCONCloudServices.......................8
7.7. iCON and HVAC Equipment Registration and User Account Creation....8
7.8. Remote Control of the iCON System.......................................................8
8. Connecting the Central Hub to the Business Network................................9
8.1. New Installation (Occupied Location) ......................................................9
8.2. New Installation (Unoccupied Location) ..................................................9
8.3. Replacing a Failed Central Hub...............................................................9
8.4. Reconnection After a Power Loss............................................................9
8.5. Wi-Fi Reconnection After Wireless Access Point Replacement ............10
9. Firmware Updates .........................................................................................10
9.1. UpdatefromtheLennoxiCONCloudServer ........................................10
9.2. UpdatefromaUSBFlashDrive ............................................................10
10. Installation Recommendations .................................................................... 11
11. Central Installation, External Components, LEDs and Terminals ............ 11
11.1. Installation..............................................................................................11
11.2. ExternalComponents ............................................................................13
11.3. Center Push Button Functions...............................................................14
11.4. LED Status Indicators............................................................................14
11.5. Terminals ...............................................................................................14
12. Mag-Mount Installation, Terminals and LEDs.............................................15
12.1. Installation..............................................................................................15
12.2. Terminals ...............................................................................................16
12.3. LED Indicators .......................................................................................16
13. Local Display Components and Installation...............................................17
13.1. Installation..............................................................................................17
13.2. ExternalComponents ............................................................................17
14. Connecting Low Voltage Wiring ..................................................................17
14.1. Control Wiring Requirements.................................................................17
14.2. Wiring Diagrams ....................................................................................18
15. Commissioning .............................................................................................22
15.1. Boot-up Screen......................................................................................22
15.2. EquipmentDiscovery.............................................................................22
15.3. Building Controller Inputs and Outputs Setup........................................23
15.4. Pin Management....................................................................................24
15.5. LocalDeviceSetUp(Optional) .............................................................24
15.5.1. Network ..................................................................................24
15.5.2. Display Settings...................................................................... 25
15.5.3. General Settings..................................................................... 25
15.5.4. Installer Information................................................................ 25
16. Replacement Parts........................................................................................25
17. Installation Checklist ....................................................................................26
18. Alert Codes ....................................................................................................27
18.1. Main Alarm Faults..................................................................................27
18.2. Building Automation and General Alarm Faults .....................................43
19. FCC Statements.............................................................................................50
19.1. FCC Compliance Statement — PART 15.19 .........................................50
19.2. FCC Interference Statement — PART 15.105 (B) .................................50
19.3. RFExposureInformation.......................................................................50
20. Revision History............................................................................................50

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1. Shipping and Packing List
Table 1. Shipping and Packing List
Quantity Description
1 ICON System includes a Central Hub, Local Display, Mag-Mount and optional
use wall plate. Also included is M-Bus Connector
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.
2. Required Field-Provided Part
The iCON Central Hub will require a 24VAC transformer, 20VA.
Cable Requirements
Table 1. Wiring
Devices Order Description Maximum Run for all
connected devices
Central Hub to ICON
Building Controller
(M-BUS)*
23W99 500 feet roll
1000 feet
LennoxPurple
Communication Cable.
Cable type - twisted pair
with shield, 22 AWG
minimum
Central Hub to Mag-
Mount (RS-485) 21P62 500 feet roll
200 feet
Standard 18AWG
thermostat wiring - 3
conductor, solid core.
Central Hub to roof
controller or Network
Thermostat Control
(NTC) (S-Bus)
27M19 500 feet roll
1000 feet
LennoxYellow
Communication Cable.
Cable type - twisted pair
with shield, 22 AWG
minimum
*Maximumlengthbetweencomponentsis300feet(90meters).
3. 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)
• Central Hub Power Input: 24VAC, 1AMP at 60Hz.
• Central Hub DC Power Output: 12VDC (+0.25V)at1ampmaximumtoMag-
Mount/Local 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)
» LocalDisplay:5”x7-1/2”x1”(127x19x25mm)
» CentralHub:7”x7-3/4”x1-1/4”(178x197x32mm)-antennalengthis
7-1/4” (184 mm)
WARNING
This product contains a chemical known to the State of California to cause
cancer,birthdefects,orotherreproductiveharm.
4. TermsandDenitions
Table 2. TermsandDenitions
Term Description
Access Point, Wireless
Access Point
Anaccesspointconnectsnearbywirelessdevicestogetherto
form a wireless local area network (WLAN). It also manages the
WLAN, and contains the security mechanisms (wireless network
SSID and password) that protect the WLAN from wireless threats.
• Awirelessaccesspointperformsnetworkswitchingservices
by sending data only to the intended recipient on the WLAN.
• TheaccesspointtypicallyconnectsthedevicesontheWLAN
to a router and through the router to the Internet.
• Anaccesspointonanetworkmaybeastand-alonedevice
that is connected to a network switch or router through an
Ethernet cable, or it may be physically located inside the
router enclosure.
• There will likely be only one wireless access point in a typical
home,buttherecouldbetwoormoreinverylargehomes
and/or homes with detached buildings on the property like
pool houses, guest houses, and such. Each access point
forms a separate physical network, with a separate network
SSID.

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Table 2. TermsandDenitions
Term Description
Broadband Modem
• A broadband modem is typically used to connect the home
LANroutertohigh-speedInternetservicesfromanISP.
• •Modemsareavailabletomatchthevariousphysical
connectiontechnologiesusedbyISPs--beroptic,TVcable,
xDSL,mobilebroadband(AirCard,etc.),andsoon.
• •Abroadbandmodemcanbeastand-alonedevicethat
connectsviaEthernetcabletotherouterofahomelocalarea
network. Or, it can be built into the router of the home local
area network.
Business network
The wireless network present in the business. A business network
is usually 802.11g and/or 802.11n, and is typically connected to
the Internet through a router. If the business network is 802.11b
only (this is rare), special considerations apply*.
Central Hub
• The processor and Central for the iCON thermostat system.
• • The Central Hub controls installed HVAC components in the
businessthatisconnectedtoitviawires.
• Central Hub network capabilities allow it to connect to
802.11b*/g/n business networks, and through that network,
connect to the Internet.
• •ACentralHubcancreateorjoinaspecialLennox-managed
localnetworkbetweeniCONdevicesoverthebusinessWi-Fi
networkand/orovertheCentralHubWi-Finetwork.
Central Hub Wi-Fi Network
• SpecialLennoxadhoc(peer-to-peerP2P)wirelessphysical
network operated by a Central Hub.
• Wi-Fidirect:thedevicesallowforWi-Fidirectcommunications
which interfaces between Central phones and Central Hubs of
other systems.
iCON Firmware
iCONsystemhardwarestoressoftwarecodeinnon-volatile
memorythatgivesthesystemitspersonalityandtellsithowto
operate the attached HVAC equipment.
This software includes code that can be considered to be
operating systems for the Local Display and Central Hub, and
applications that implement the functionality of the system.
iCONrmwarestoredintheiCONsystemhardwarecanbe
updated to modify the current system operation and to add new
features to the iCON system:
• RemotelyfromtheLennoxiCONcloudserversthroughthe
Internet,providedtheiCONisconnectedtothenetworkand
the network is connected to the Internet.
• LocallythroughaUSBashdrivepluggedontotheUSBport
on the side of the Central Hub.
No hardware changes are needed when new functions are added
through a software update.
Table 2. TermsandDenitions
Term Description
iCON Hardware
An iCON system consists of the following hardware:
• Central Hub
• Mag-Mount
• Local Display
Each hardware item is a small computer that has an internal
processorthatexecutesstoredsoftwarecodetoperformits
tasks.
This software code can be easily updated to modify current iCON
system functions and to add new functions to the installed iCON
hardware without changing any hardware.
Ethernet
• Ethernet (802.3) is the most common networking technology
for wired local area networks.
• Typical home Ethernet LANs use four twisted pairs of wires in
a cable of type Category 5, Category 5e, or Category 6 (Cat
5, Cat 5e, or Cat 6).
• Most home Ethernet LANs run at 100 MBits/sec (100 BASE-
TX)and/or1GBit/sec(1000BASE-T).Devicesofbothspeeds
cancoexistonthesameLANwithoutlimitingthespeedof
fasterdevices.
Local Display
• The LCD tablet-like display for the thermostat system.
• The Local Display sits on the Mag-mount, and shows system
statusandreceivesusercontrolinputthroughatouchscreen
interface.
• All user input collected by the Local Display is sent to the
Central Hub for processing.
• AllscreendatashownbytheLocalDisplayisreceivedfrom
the Central Hub.
InternetServiceProvider
or ISP
• AnInternetserviceprovider(ISP)isanorganizationthat
providesaccesstotheInternet.WhileanISPmayalso
provideemail,webhosting,andrelatedservices,itsmain
serviceisa(usuallyhigh-speed)connectionbetweenthe
customer’s router and the Internet.
LennoxiCONThermostat
(Central Hub Thermostat)
• TheLennoxiCONSystemThermostatisathermostatand
HVAC control system consisting of a Central Hub, a Mag-
Mount, an Local Display, and an I/O Board.
• The Central Hub uses wired connections to control RS-Bus-
communicating HVAC components.
• The Central Hub uses a network connection to the RTUs and
Building Automation. Once connected, multiple RTUs can be
seen and controlled by a single Central Hub.
• Once connected to the local network, iCON systems connect
toLennoxiCONRemoteFacilitiesPortalviatheInternetand
can be remotely accessed and controlled by the business
owner or installer through a computer.
Lennox-ManagedLocal
Network
ALennox-managedlocalnetworkisindependentofthemeansof
transport--itcanoperateoverthebusinessWi-Finetworkorover
the Central Hub Wi-Fi network.

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Table 2. TermsandDenitions
Term Description
Local Area Network
• A LAN is a computer network that allows computers and other
devicesinarelativelysmallareasuchasinahomeorina
suiteofofcestocommunicatewithoneanother.
• LANs were originally based on copper wire cables, but now
canbewired,wireless(WLAN),oramixofbothtechnologies.
LAN is the generic term for all.
Remote Facilities Portal
SpecialLennoxremotewebsitethatallowstheconsumer
to connect to and control an iCON system from a laptop, or
desktop computer anywhere in the world through the Internet.
The iCON system must be connected to a Wi-Fi network that is,
in turn, connected to the Internet, and the iCON system must be
registeredontheLennoxiCONcloudservers.
Router Wireless Router
or Wireless Broadband
Router
• A router connects networks together.
• Typically, a router connects a home LAN to the Internet
(through a modem), and contains the security mechanisms
that protect the LAN from Internet threats.
• A router often contains a wireless access point, network
switch, and router all in a single compact enclosure. This is
usually called a Wireless Router.
• When a broadband modem is included, it is usually called a
Wireless Broadband Router and connects directly to the ISP.
Switch or Network Switch
• Aswitchconnectstwoormoredevicestogethertoforma
network.
• A switch sends data only to its intended recipient instead of to
alldevicesonthelocalareanetwork,allowingefcientuseof
thenetworkandthedevicesconnectedtoit.
• Awirelessaccesspointperformsswitchingservicesby
sending data only to the intended recipient on the wireless
localareanetworkinsteadoftoalldevicesontheWLAN.
Wide Area Network
Awideareanetwork(WAN)coversalargearea(neighborhood,
city, county, state, etc.), connects local area networks in that area
together,andprovidesconnectionstodistantWANsandLANs
through the Internet.
Wi-Fi
Wi-Fi is a trademark of the Wi-Fi Alliance for a wireless local area
network (WLAN) based on the 802.11 standards. Wi-Fi is now the
common term for a WLAN.
Wi-Fi Direct
• Wi-Fi Direct is a trademark of the Wi-Fi Alliance for a wireless
networkstandardthatallowsnearbydevicestoeasilyconnect
directly to each other and form an ad hoc peer-to-peer
networkwithoutrequiringaxedwirelessaccesspointand
the associated infrastructure.
• A Central Hub Wi-Fi network has similar functionality, but
does not fully comply with the standard and, therefore, is not
Wi-FiDirectcertied.
Wireless Ad-hoc Network
A wireless ad hoc network – sometimes called a peer-to-peer
(P2P) network – is a decentralized type of wireless network that
doesnotrelyonapre-existinginfrastructurelikexedaccess
points, switches, and routers. A wireless connection is made
directly between participants.
Table 2. TermsandDenitions
Term Description
WirelessDevice
Awirelessdeviceconnectstoanaccesspointviaradiosignals.
Many computers, printers, cameras, tablets, Central phones, and
relateddeviceshavebuilt-inwirelessconnectivity(Wi-Fi)andcan
join a nearby Wi-Fi network.
Wireless Local Area
Network
Awirelesslocalareanetworkconsistsofnearbywirelessdevices
connected together through a wireless access point. The access
pointtypicallyconnectsthedevicesontheWLANtoarouterand
through the router to the Internet.

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5. iCON System Hardware
5.1. Central Hub
• Typicallymountsinthebusinessofcespace;
• Contains the main processor and controls the iCON thermostat components
and the HVAC components that are connected to it
• Communicates with the installed HVAC equipment over regular four-wire
thermostat cable
• Connects to Lennox iCON cloud servers through the business network to
receive rmware updates, and to provide system status information and
system control capabilities to business owners remotely
5.2. Mag-Mount
• AttachestothewallandprovidesaphysicalattachmentfortheLocalDisplay;
• ReceivespowerfromtheCentralHubandcommunicateswithitoverregular
four-wire thermostat cable
• Acts as a communication bridge between the Central Hub and the Local
Display
5.3. Local Display (HD Display)
• Is an LCD touch screen that snaps onto the Mag-Mount
• Receives power from the Mag-Mount and communicates with it through
electrical contacts on the back of the case
• Shows system information such as room temperature, room humidity, set
points, local weather, and system status
• Provides a touch screen graphic interface for the user to turn features on
and off, change set points, set up and select schedules, and adjust system
parameters
• Contains the primary room temperature sensor as well as various other
sensorssuchasuserproximity
5.4. iCON Building Controller (16A50)
• This controller is used to connect all the lighting, automation, and other
devicesinthebuilding
• Conguredvialocaldisplay
• Building Controller address is assigned during installation
• InstallerdenesrulesonthebuildingcontrollertotriggerAlerts
• Refer to the ICON Building Controller Installation and Setup guide which is
included with the controller for further details
6. iCON Hardware System Architecture
6.1. Equipment Monitoring
The system can monitor up to the following:
• 93 rooftop units (M1-8, M2, M3 and NTC)
• Four iCON Building Controllers (building automation)
• SixteenEnergyMonitoringMTUs
6.2. Equipment Interfaces Supported
• S-Bus (HVAC)
• M-Bus (Building Automation)
• TCP/IP (Energy Monitoring)
7. Central Hub Descriptions
The iCON Central Hub is the focal point for the business HVAC system. It is
typically mounted near the mechanical room of the business and is wired to
therooftopunits(RTU)usingcommonfour-conductor18AWGwire.Theeld
supplied transformer supplies 24VAC power to the Central Hub.
7.1. Central Hub
The Central Hub contains these main functional blocks:
• Microprocessor that manages the Central Hub, Mag-Mount / Local Display,
and the connected HVAC system
• A wired serial communication interface to the iCON Mag-Mount / Local
Display
• A wired serial communication interface to the HVAC roof top unit(s)
• A USB host
• A Wi-Fi radio module for wireless communication with the business Wi-Fi
networkandlocalLennoxdevices
• A pushbutton switch for system reset and initiating communication with local
Lennoxdevices
• LED indicators to show system status
• Power supplies for itself and the iCON Mag-Mount / Local Display
TheCentralHubprovidesthefollowingmainfunctions:
• ReceivesusercontrolinputsfromtheLocalDisplay
• ReceivesstatusinformationfromotherHVACcomponentsinthesystem
• Sends HVAC system status and other information to the Local Display for
viewingbytheuser

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• Runs software algorithms to control the HVAC components in the system to
precisely satisfy user set points
• Connects to the network to access the Internet, allowing interaction with the
systemremotelybythebusinessownerorLennox, and access to Lennox
cloudservicesliketimeandweather.
• Connects through the business network to the portal in the business running
the Lennox iCON Remote Facilities Portal to allow system setup, show
system status, and control the system from the portal.
• ProvidespowerfortheCentralHubandtheMag-Mount/LocalDisplay.
Communicang
RTU
Communicang
RTU
Customer-Provided
ICON
Building
Controller
(Up to Four
BC supported)
(M-BUS)
7” Touchscreen
Display & Mag-Mount
Inet
Lennox
Server
Web-Enabled
Device
Ethernet
S-Bus on RS-485 (L Connecon®)
M3
Ctrlr
Network
Ther mostat
Control (NTC)
Lennox
Central Hub
M-Bus on RS-485
M-BUS S-BUS
(Yellow Wire)
ComfortSensor
Access
Point
M2
Ctrlr
M1-8
CtrlrCS8500
WiFi
Role-Specific Portals
Communicang
RTU
Electro-
Mechanical
RTU
Web-Enabled
Device
Ener gy
Monitoring
Ethernet
(Purple Wire)
Figure 1. iCON Hardware Architecture
7.2. Central Hub Networks
The iCON Central Hub can connect to two separate wireless networks
simultaneously when the business network is either 802.11n or 802.11g (see
the Special Considerations for 802.11b-Only business Networks section in the
Appendix):
• The business network
• The Central Hub network
• An iCON Central Hub can participate in one, two, or three separate members-
only (intangible) networks at the same time:
• AspecialLennox-managednetworkrunningbetweenaCentralHubandthe
LennoxiCONcloudservers,overthebusinessnetwork
Central Hubs do not connect to the business local area network (intangible)
(Blue)–anddonotseeotherwirelessdeviceslikecomputersorprintersinthe
business that are participating in the business LAN. Likewise, computers and
otherdevicesonthebusinessLANcannotseeorinteractwithCentralHubs.
7.3. Business Network
Is the typical general-purpose wireless physical network in a business marked
as gray in “Figure 1. iCON Hardware Architecture” on page 7:
• Isopen–mostanycomputerorcomputer-likewirelessdevicecanconnect
to it
• Allowsmanyseparateintangiblenetworkstorunoveritsimultaneously
ThebusinessWi-Finetworkisusuallyoperatedbyadevicethatisacombination
wireless access point and router, typically called a wireless router.
The wireless access point:
• Managesthebusinessnetworkandtheprocessofconnectingdevicestoit
• ProvideswirelessnetworkSSIDandpasswordsecurityfunctionsthatprotect
the wireless LAN from local wireless threats
• Performs network switch duties by sending data only to its intended recipient
ontheWi-Finetworkinsteadoftoalldevicesonthenetwork
The router:
• Connectsabusinesslocalareanetwork(LAN)totheInternetserviceprovider
– usually through a modem – and to the Internet beyond (wide area network
or WAN)
• Contains the security mechanisms that protect the business Wi-Fi network
from Internet threats
When the wireless access point/router is combined with a cable, DSL, or other
modem, it is usually called a wireless broadband router
A Central Hub uses the business network to communicate with:
• Other Central Hubs that are installed in the business
• TheLennoxICONcloudservers.
ACentralHubcannotseeorinteractwithotherwirelessdeviceslikecomputers
or printers in the business that are connected to the business network. Likewise,
nootherdeviceonthebusinessnetworkcanseeorinteractwithaCentralHub.
7.4. Central Hub Wi-Fi Physical Network
The Central Hub Wi-Fi network marked as yellow in “Figure 1. iCON Hardware
Architecture” on page 7:
• Is a private ad-hoc peer-to-peer wireless physical network between two
Lennoxdevices

8
• IsestablishedattherequestofaservicetechnicianbypressingtheCentral
Hub center pushbutton
• Is managed by the Central Hub
• Operates while the Central Hub is connected to the business network – or not
• Operates whether the business network is running or not or is connected to
the Internet or not
• AllowsonlyaspecialLennox-managedCentralHub↔nearbylocalnetwork
torunoverit(Brown)
• Is separate from, and not connected to the business network
The Central Hub internal Wi-Fi module can remain connected to the business
network(andtheLennoxiCON cloud servers andother Central Hubsin the
business) while establishing and maintaining a special ad hoc peer-to-peer
(P2P)WiFiphysicalnetworkbetweenitselfandanearbydevicerunningthe
LennoxiCONRemoteFacilitiesPortal.
7.5. CentralHub↔LennoxiCONCloudServerNetwork
TheCentral Hub ↔Lennox iCONcloudservernetwork is markedasredin
“Figure 1. iCON Hardware Architecture” on page 7:
• IsaprivateLennox-managednetworkbetweenoneCentralHubinabusiness
andiCONcloudservices
• Is a secure network
• Runs on the business network, through the business router, through the
Internet,toaLennoxiCONcloudserver
ThroughthisprivateLennox-managednetwork:
• iCON web-portal can access and control the iCON system installed in the
business from remote locations
• iCON system and HVAC equipment registration and user account creation is
accomplished
• LennoxiCONcloudservicesdiscoverandregisteradditionalorreplacement
HVAC equipment installed in the business
• iCON system and HVAC equipment installation and performance data is
collected.
7.6. Central Hub Connection to Lennox iCON Cloud
Services
Whena Central Hub rstconnectstoa functioning businessnetwork thatis
connected to the Internet through a router in the business, it sends a request
toLennoxiCONcloudservices.ThisrequestisforaspecialprivateLennox-
managednetworktobeestablishedoverasecure(https)connectionbetween
thatCentralHubandaLennoxiCONcloudserver.
Onceestablished,nootherdevicecanjointhatparticularnetwork.
TheLennoxiCONserverlearnstheidentityoftherequestingCentralHuband
addsthatinformationtotheLennoxiCONcloudservicesdatabaseofCentral
Hubs.
IftheconnectionbetweentheCentralHubandtheLennoxiCONcloudserver
is interrupted for any reason (business power failure, Internet outage, etc.), the
serverwillrecognizetheCentralHubwhentheconnectionisrestoredandthe
CentralHubrequestsaconnection.Communicationandactivitiesbetweenthat
CentralHubandtheLennoxiCONcloudpickupwheretheyleftoff.
7.7. iCON and HVAC Equipment Registration and User
Account Creation
During the installation and setup process, the iCON system and the HVAC
equipment connected to it is registered with Lennox iCON cloud services
(system registration). System performance, event, and alarm data collection
begins.
The iCON and HVAC equipment registered will always be associated with the
businessanditslocationuntiltheyarereplacedorremovedfromservice.
When an HVAC component is replaced or a new one is added, the Lennox
iCONserverwilldiscoverthechangeandaddthenewequipmenttothesystem
registration.
Once the system is registered, the business owner can create a user account
ontheLennoxiCONcloudserver.Thisisaseparateprocessthatallowsthere
to be a user account that can be associated with one or multiple iCON systems
installed in one business, or with multiple iCON systems installed in multiple
businesses.
Forexample,asinglesitemayhaveseveraliCONcontrolsystemsinstalledin
it. A user account can be associated with each of the iCON systems installed
at all the sites.
If a business owner sells a business containing one or more iCON systems
associated with his or her user account, the system registration for the iCON
system(s) and attached HVAC equipment installed in that business remains
unchanged.Then,whenthenewownercreatesauseraccount,theprevious
owner’s user account is disassociated from the equipment installed in the
business that was sold.
7.8. Remote Control of the iCON System
Once an iCON system is registered and a user account is set up, the iCON
system can be controlled remotely from a computer using a web browser.
TheseservicesoperateonlythroughuserandinstalleraccountsontheLennox
iCONcloudserversandarerigorouslyauthenticated.
• For the business owner, the web portal application provides the full
functionality of the Local Display installed in the business and allows the user
to monitor and control the iCON and HVAC equipment.

9
• For the Lennox installer, the web portal applications provide full control of
the iCON system along with the ability to view system performance data,
troubleshoot and diagnose problems with the equipment, and ne tune
systemoperationwithoutmakingaservicecalltothebusiness.
Inallcases,theremotecomputermusthaveInternetaccess andbeableto
reachLennoxiCONcloudservicesthroughtheInternet.Theuserorinstaller
mustthenlogintotheirrespectiveaccountsonLennoxiCONcloudservices
before being allowed to access the iCON system in a business.
For remote control of an iCON system in a business:
• Appropriateapplicationsmustbeinstalledandoperatingonremotedevices
• UserandinstalleraccountsmustbesetupinLennoxiCONcloudservices
• Remote devices must have access to the Internet to reach Lennox iCON
cloudservices
• Remote users must log into user or installer accounts
• The iCON system in a business must be connected to the business network
• The business Wi-Fi router must be connected to the Internet
• Computersmustconnectto,andgothroughLennoxiCONcloudservicesto
access an iCON system remotely.
• Thewebaccesspointishttps://portal.lennoxicon.com
8. Connecting the Central Hub to the Business Network
8.1. New Installation (Occupied Location)
Whenrstpoweredonduringinstallation,theCentralHubisnotconnectedto
the business network. The Central Hub goes through its power up routine and
then waits for user input to proceed with setup, commissioning, and connection
to the business Wi-Fi network. The business Wi-Fi iCON indicator on the front
of the Central Hub will be steady amber, showing that the Central Hub is not
connected to the business Wi-Fi network.
When setting up the connection to the business Wi-Fi network, a list of nearby
Wi-Fi networks found by the Central Hub Wi-Fi module is shown. Someone
must select the business Wi-Fi network from the list and then enter the correct
password. The business owner can enter this information, or the installer (with
the business owner’s permission) can enter this information.
When the Central Hub successfully connects to the business network, the
business Wi-Fi iCON indicator on the front of the Central Hub will be steady
green, showing that the Central Hub is now connected to the business network.
The business Wi-Fi SSID and password information is retained by the Central
Hubinnon-volatilememoryforusewhentheCentralHubneedstoreconnect
to the business network (such as when power is restored after an outage).
Once the Central Hub successfully connects to the business network, it will try
tocontactLennoxiCONcloudservicesthroughbusinessWi-Firouter,andthe
Internet.Whensuccessful,theLennoxiCONcloudserverestablishesaprivate
Lennox-managedCentralHub↔LennoxiCONcloudservernetworkthatthe
CentralHubusestosenddatatoandreceivedatafromtheLennoxiCONcloud
servers.
The Lennox iCON cloud server learns the identity of the iCON system, the
revisionleveldetailsoftheiCONsystemandthoseoftheHVACequipmentthat
isattachedtoit(systemregistration).ThisinformationiskeptontheLennox
cloudservers.
The Central Hub will automatically reconnect with the Lennox iCON cloud
serverswhenInternetaccessisrestoredafteranoutage.
8.2. New Installation (Unoccupied Location)
Most newly-constructed sites will not have a business network installed or
operating until after it is sold and the business owner moves in. Likewise,
existingsitesthathavebeensold,vacated,andarewaitingforthenewowners
tomoveinwillnotlikelyhaveabusinessnetworkoperating.
Without the network, the installer will still be able to set up an iCON / HVAC
system and adjust the operating parameters, however, without the network
operating,thefollowingiCONactivitiesarenotavailable:
• User remote access
• Installer remote access
• RegisteringthesystemwithLennoxiCONcloudservices
• UpdatingiCONorattachedHVACequipmentrmwarethroughtheInternet
Once the business network is operating, each iCON system can be connected
to it. When connected, the iCON system will contact Lennox iCON cloud
services,thesystemwillberegistered,andauseraccountcanbesetupas
describedabove.
8.3. Replacing a Failed Central Hub
Whenrstpoweredonduringinstallation,anewCentralHubisnotconnected
to the network. It must be connected to the network as described for a New
Install,above.
8.4. Reconnection After a Power Loss
Thetypicalscenario:TheCentralHubwaspreviouslyconnectedtothebusiness
network, and is later powered up after a power outage or after the Central Hub
or the business network has been turned off.
After the Central Hub start-up routine completes with no errors, the Central
Hub attempts to reconnect to the business network using previously stored
credentials.Whenthebusinessnetworkbecomesavailableagain,theCentral
Hub will reconnect to it.

10
The Central Hub will automatically reconnect with the Lennox iCON cloud
serverswhenInternetaccessisrestoredafteranoutage.
Nouserinterventionisrequired.
8.5. Wi-Fi Reconnection After Wireless Access Point
Replacement
The typical scenario: The Central Hub is currently connected to the business
Wi-Fi network and then the business owner replaces the business Wi-Fi
network wireless access point or changes the business Wi-Fi network SSID
and/or password.
After the connection to the business Wi-Fi network is lost, the Central Hub will
attempt to reconnect using stored credentials when the business Wi-Fi network
becomesavailableagain.
• If the business Wi-Fi network wireless access point has been replaced and
the new access point has been set up with a network SSID and password
that are the same as before, the Central Hub will automatically reconnect to
the business Wi-Fi network.
• IfthebusinessWi-FinetworkSSIDand/orpasswordhavebeenchanged,or
the wireless access point has been replaced and set up with a network SSID
and/or password that are different from before, the Central Hub will not be
able to reconnect to the business Wi-Fi network until the new network SSID
and/or password are entered into the Central Hub.
9. Firmware Updates
From time to time rmware updates are released for the iCON thermostat
system and for the HVAC equipment that is compatible with it. The iCON
systemhasthecapabilityofreceivingrmwareupdatesforitselfandforthe
HVAC equipment connected to it through the Internet.
ToreceivermwareupdatesthroughtheInternet:
• TheiCONandattachedHVACequipmentmustbe registered with Lennox
iCONcloudservices
• The iCON system must be connected the business network
• The business network must be connected to the Internet
When a new iCON system is installed in a business and the system is
registered,datacollectedincludesthehardwareandrmwarerevisionlevels
of the iCON components and of all the HVAC equipment attached to it. After
systemregistration,LennoxiCONcloudservicescheckstoseeifthermware
in the newly installed iCON system and HVAC equipment is up to date. If it is
not,thermwareisupdatedthroughtheInternetimmediately.
If a component of an installed iCON system or of the HVAC equipment
connected to it is replaced, or if a HVAC component is added, it will be
automaticallydiscoveredandaddedtothesystemregistrationatLennoxiCON
cloudservices.Newlyinstalledcomponentsfoundtohaveout-of-datermware
will be updated through the Internet.
During normal operation, an iCON system contacts Lennox iCON cloud
services every night to see if a rmware update for it is available. If a new
rmwareupdateisavailableanditappliestotheiCONsystemortoanyofthe
HVAC equipment attached to it, the update is sent through the Internet. This
processoccursatnightwhennetworktrafcistypicallylighter.
9.1. Update from the Lennox iCON Cloud Server
Updates can be pushed from the Lennox iCON cloud server to the Central
Hub through the Internet. This requires that the business network be operating
and connected to the Internet, and that the Central Hub be connected to the
business network. Since the data rate through this route may be slow and there
may be network congestion, such updates are usually done late at night.
Once the transfer of the update to the Central Hub is complete, the Central Hub
checksthereceivedupdatetomakesurethatithasarrivedingoodcondition.
WhentheCentralHubissatisedthattheupdateisgood,itappliestheupdate
tothetargetdevice.
In the case of the Local Display, the update is sent over the RS-485
communication link, through the Mag-Mount, and into the Local Display.
In the case of updates to the Central Hub, the update is loaded into internal
ashmemoryandtheCentralHubprocessorisrestarted.HVACoperationis
not affected during the Central Hub processor restart – everything that was
going on before the restart continues during and after the restart.
9.2. Update from a USB Flash Drive
WhenaashdriveisinsertedintotheUSBportoftheCentralHub,theCentral
Hublooksatthecontentsoftheashdrive.IftheCentralHubdeterminesthat
theashdrivecontainsanupdateforitself,theLocalDisplay,orforaconnected
eld-upgradeableHVACassetconnectedtoit,andthatthebinaryimageonthe
ashdriveisnewerthanwhatiscurrentlyinstalled,itautomaticallytransfersa
copy of the update into internal memory.
Thecenterpushbuttonindicatorashesamberduringthetransfer.
Ifthetransferisinterruptedbeforeitiscomplete–ashdriveremovedfromthe
Central Hub USB port, power interruption, etc. -- any portion that has already
been transferred to the Central Hub is discarded.
ThetransferwillbeginanewwhentheashdriveisagaininsertedintotheUSB
port.
Once the transfer of the update to the Central Hub is complete, the Central Hub
checksthereceivedupdatetomakesurethatithasarrivedingoodcondition.

11
InthecaseofequipmentotherthantheCentralHub,theupdateissentover
theRS-485communicationlinktotheMag-Mount/LocalDisplay,oroverthe
RS-Bus to the RTU or other connected equipment.
In the case of updates to the Central Hub, the update is loaded into internal
ashmemoryandtheCentralHubprocessorisrestarted.HVACoperationis
not affected during the Central Hub processor restart – everything that was
going on before the restart continues during and after the restart.
IfthesameashdriveisagaininsertedintotheUSBportontheCentralHub,
orifadifferentashdrivecontainingthesameiCON update isinserted,the
Central Hub will take no action because the image on the ash drive is not
newer than what is already installed.
10.Installation Recommendations
WARNING
Improper installation, adjustment, alteration, service or maintenance can
cause property damage, personal injury or loss of life.
InstallationandservicemustbeperformedbyalicensedprofessionalHVAC
installer(orequivalent)oraserviceagency.
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.
11. Central Installation, External Components, LEDs and
Terminals
11.1. Installation
a. Things to consider when installing the Central 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.
• Central Hub antenna should be positioned such that it is roughly
vertical,nomattertheorientationoftheCentralHub,itself.
• Do not install the Central Hub on the indoor unit, duct work, or other
equipmentthatcouldinducevibrationintheCentralHub
• Do not install the Central Hub on or near large metal objects. This could
adverselyaffecttherangeanddirectionalcoverageoftheCentralHub
Wi-Fi signal.
• If the Central Hub MUST be installed on a metal object, orientate the
antenna perpendicular to the metal surface.
• In all cases, the Central Hub antenna orientation may need to be
adjusted to obtain best Wi-Fi results.
b. Use the following procedure outlined in “Figure 2. Central Hub Installation”
on page 12.
c. For low voltage wiring connections use diagrams in section titled “14.
Connecting Low Voltage Wiring” on page 17.

12
1/4”
STRIP 1/4” INSULATION FROM
END OF EACH CONTROL WIRE
A
B
D
USE CENTRAL HUB AS TEMPLATE TO MARK DESIRED MOUNTING
LOCATIONS ON WALL OR STUD.
CAUTION: DO NOT OVERTIGHTEN LOWER MOUNTING SCREW, MAY
DAMAGE CENTRAL HUB.
SECURE CENTRAL HUB TO
WALL WITH
FIELD-PROVIDED
FASTNERS
RAERTNORF
KEYHOLE
THROUGH-HOLE
CMAKE CONNECTIONS TO CENTRAL HUB.
TOUCH LEVER BACK AND
INSERT WIRE THROUGH
HOLE LOCATED ON
BOTTOM SIDE OF
CONNECTOR. RELEASE
LEVER TO SECURE WIRE.
CENTRAL HUB WIRE
CONNECTORS
18-GAUGE THERMOSTAT WIRE
Figure 2. Central Hub Installation

13
11.2. External Components
LEFT SIDE VIEW
RS+S-C +- AB
FRONT SIDE VIEW
USB
(TYPE A)
S-BUS
POWER TO
MAG-MOUNT
COMMUNICATION
TO MAG-MOUNT
FROM POWER SUPPLY
TO CENTRAL HUB
Center Push Button
and LED Center Ring
LED Status
Indicators
-
ETHERNET
(RJ-45)
M-BUS
(Factory Installed Plug
(EB1350M-03-000)
G
+
Figure 3. Central Hub Indicators and External Components

14
11.3. Center Push Button Functions
The Central Hub center button switch has one primary function. The central hub
canberebootedbypressingandholdingthecenterbuttonforvesecondsto
reboot.
The center button has an LED associated with it that indicates the status of the
Central Hub commissioning state (see “Table 2. LED Status Indicators”).
11.4. LED Status Indicators
Table 2. LED Status Indicators
Central Hub
ICON Description
The center push button LED ring indicates the following:
• Sold Blue - System is operating normally.
• Solid Green - Wi-Fi network in use.
Indicates the status of the internal Wi-Fi module and whether or not the
Central Hub can connect to the local business network.
• Flashing Red - Wi-Fi initialization error.
• SolidAmber-BusinessWi-Finetworknotactive.
• Solid Green - Connected to business Wi-Fi network (default).
Indicates the status of the thermostat Mag-Mount and Local Display and
whether or not the Central Hub can communicate with the Local Display.
• Flashing Red - System connection failure.
• Sold Green - System connected and operational (default).
Indicates the status of the HVAC equipment in the business that is controlled
by the Central Hub, and wither or not the Central Hub can communicate with
it.
• Flashing Red - No HVAC equipment is connected.
• Solid Green - HVAC equipment connected and RS-BUS is functional
(default).
Indicates there is a critical alert condition present.
• Flashing Red - Critical Alert.
• SolidGreen-Unitisoperatingnormallyandnocriticalalertsactive.
11.5. Terminals
Table 3. Terminal and other Connection Designations
Terminal Designation Description Terminal
Color
R24VAC input Red
S+ S-BUS Yellow
S- S-BUS Green
C24VAC return Black
+12VDC output Blue
-12VDC return Black
ACommunications bus A (RS-485) Yellow
BCommunications bus B (RS-485) Green
USB port Formanualrmwareupdates Not applicable
M-BUS Terminals
- ( M-BUS low - data line 2) Black
G - Ground Black
+ (M-BUS high - data line 1) Black
Ethernet Jack 100BaseT, RJ-45, 802.3 Black

15
12.Mag-Mount Installation, Terminals and LEDs
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 Local Display and Mag-Mount away from devices and objects that
couldbedamagedbystrongmagneticelds.
12.1. 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:
a. Unpack the Local Display and Mag-Mount (wall base).
b. Determine the best location to install Mag-Mount. Ideal location should be
locatedawayfromoutsidewall,directsunlightordischargeairvents.
c. Cut or drill a small hole for thermostat wiring.
3/8” (10 mm)
Diameter Hole
d. Pullaboutthreeinchesofthermostatwirethroughtheopeningandremove
the outer thermostat wire jacket.
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 Local Display.
e. Strip 1/4” (7 mm) insulation from end of each wire.
1/4”
f. Usealeveltoaligneitherthemag-mountorwallplateonwallhorizontally.
g. 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
h. Use Mag-Mount as a template to mark the desired mounting hole locations
on the wall.

16
Use either the Mag-Mount or wall
plate as a template to mark the
desired mounting hole locations
on the wall.
i. 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 may distort the mag-
mount plastic housing and cause connection issues when installed the Local
Display.
j. Securemag-mounttowallorthroughwall-platetowallwithprovided#6x
1.25” pan-head screws (4).
k. Connect thermostat wiring to Mag-Mount (see “Figure 5. iCON Central Hub
to iCON Mag-Mount and 24VAC Power Supply” on page 18).
l. 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.
12.2. Terminals
Table 4. Terminal and other Connection Designations
Terminal Designation Description Terminal
Color
+12VDC output Blue
-12VDC return Black
ACommunications bus A (RS-485) Yellow
BCommunications bus B (RS-485) Green
12.3. LED Indicators
a. AblueLEDisvisibleonthefrontoftheMag-Mountwhenitisconnected,
power applied, and the Local 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 Local Display is installed.
Blue LED is visible here when
mag-mount is properly connect,
power-on and HD display
is not installed.
Blue LED is also visible through
top vent when mag-mount is
installed. (Only visable when
mag-mount and HD display are
not making good contact.)
COMM BUS -
Terminals A and B
b. TheLEDhasthreeconditions;steadyon,ashingandoff.Thoseconditions
indicate the following:
• Steady On-Mag-MountisreceivingpowerfromtheCentralHub.
• Flashing - Mag-Mount is receiving power from the Central Hub but
couldbeexperiencingoneofthefollowingconditions:
»The COMM BUS wires are disconnected or are shorted together,
»There has been a software error in the Mag-Mount processor,
»There has been an internal hardware error in the Mag-Mount.
• Off-Mag-MountisnotreceivingpowerfromtheCentralHuborthere
has been a serious Mag-Mount internal hardware/software failure or
the blue LED is also off when an Local Display has been installed.

17
13.Local Display Components and Installation
13.1. Installation
a. Hold the Local Display by the edges, line it up with the Mag-Mount, and
movetheLocalDisplaytowardtheMag-Mount.
b. When the magnets in the Mag-Mount attract the Local Display, guide it
toward the Mag-Mount and let the magnets pull it into place.
c. Lightly press on the sides of the Local Display to verify it is completely
seated on the Mag-Mount.
d. ToremovetheLocalDisplayfromtheMag-Mount,rotatetheLocal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 Local 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 Local Display from the Mag-Mount
when it is not rotated.
NOTE: If the Local Display is removed from the Mag-Mount base, the display
will shut down and will not be able to communicate with the system.
System can be controlled from the web portal once registration has
been completed.
e. DonotremovethelabelcoveringtheLocal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
13.2. External Components
• ProximitySensor-DetectsapersonapproachingtheHDDisplay.IftheHD
DisplayisinScreenSavermodeandtheProximityDetectfeatureissetto
ON,theproximitysensortakestheHDDisplayoutofscreensavermodeand
returns the home screen when someone approaches.
• Power Button - Resets the HD Display when pressed and held for about 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 4. HD Display Components
14.Connecting Low Voltage Wiring
ThefollowingdiagramsinthissectionillustratesthebasicLennoxcontrolwiring
for all compatible components.
14.1. 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).

18
14.2. Wiring Diagrams
Thefollowingdiagramsaretypicallowvoltagewiringconnectionsforvarioussystemcongurations.
R
I-
C+-AB
AB
COMM BUS
+-
12VDC
S+ S-
iCON CENTRAL HUB
iCON MAG-MOUNT
FIELD-PROVIDED
POWER SOURCE
Figure 5. iCON Central Hub to iCON Mag-Mount and 24VAC Power Supply

19
Rs+ s- c+- AB
FRONT SIDE VIEW
+S −
S-BUS ON
M3 UNIT CONTROLLER
Shields
+S −
S-BUS ON
M2 UNIT CONTROLLER
Shields
Lennox Yellow Jacket (27M19)
Do not connect shield
wire to Central Hub
+S −
S-BUS ON
M1-8 UNIT CONTROLLER
+S −
S-BUS ON
NTC
S-BUS ON
CS8500
CM+ CM-
S-BUS ON
Comfort Sensor
89
Shields
Shields
Shields
Shields
NOTE: For Comfort Sensor and CS8500, the S-Bus address used must match the NTC or Unit Controller S-Bus address in order to control that unit directly.
In addition, allow enough wire length to wire nut shield wires and located inside the wall behind the CS8500 and Comfort Sensor.
Each device on the S-Bus must have a unique S-Bus address
starting with 1 and sequential among the other devices.
Wire Nut
IMPORTANT: Installation manuals for individual S-Bus devices may
show different configuration of shield wire grounding. The shielding
and termination guidance in this document supercedes all prior documentation.
IMPORTANT: Do not attach shield wire to the Central Hub. This Central Hub is typically mounted
on drywall or other non-conductive surfaces and is not well grounded. Generally, roof-top unit
controllers will have better grounding and are preferred. Attach shield to ground on only one
roof-top unit controller.
NOTE: This figure shows the shield grounded at an M2 unit controller. Grounding to any unit
controller is sufficient. The figure is for illustration only.
Figure 6. iCON Central Hub to S-Bus Devices

20
Rs+ s- c+- AB
FRONT SIDE VIEW
+M−
M-BUS ON
iCON Building
Controller
+M−
Shields
Purple Jacket
Do not connect shield
wire to Central Hub
+M−
+M−
Shields
Shields
(Do not connect)
Each device on the M-Bus must have a unique M-Bus address
starting with one and sequential amoung the other devices.
M-BUS ON
iCON Building
Controller
M-BUS ON
iCON Building
Controller
M-BUS ON
iCON Building
Controller
SIDE SIDE VIEW
NOTE: iCON can support up to four iCON Building Controllers
-
G
+
IMPORTANT: Do not attach shield wire to the Central Hub. This Central Hub is typically
mounted on drywall or other non-conductive surfaces and is not well grounded. Generally,
iCON Building Controllers will have the better grounds and are preferred. Attach shield to
ground on only one iCON Building Controller.
M-BUS Terminal
Figure 7. iCON Central Hub to iCON Building Controller (M-Bus)