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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 firmware 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 firmware updates for itself and for the
HVAC equipment connected to it through the Internet.
To receive firmware 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 firmware 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 firmware
in the newly installed iCON system and HVAC equipment is up to date. If it is
not, the firmware 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 firmware
will be updated through the Internet.
During normal operation, an iCON system contacts Lennox iCON cloud
services every night to see if a firmware update for it is available. If a new
firmware 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 traffic 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 satisfied 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
flash 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 flash drive is inserted into the USB port of the Central Hub, the Central
Hub looks at the contents of the flash drive. If the Central Hub determines that
the flash drive contains an update for itself, the Local Display, or for a connected
field-upgradeable HVAC asset connected to it, and that the binary image on the
flash drive is newer than what is currently installed, it automatically transfers a
copy of the update into internal memory.
The center pushbutton indicator flashes amber during the transfer.
If the transfer is interrupted before it is complete – flash 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 flash 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.
