OPTIONAL FEATURES HeatNet Control V3
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Saving to the on-board memory is useful when changes have
been made to the settings menu, prior to upgrading firmware,
or doing a factory reset. Upon completion the settings can
then be loaded using, RESTORE SETTINGS: ONBOARD
MEMORY.
Saving to a USB drive is useful if a control board has to be
replaced. The file on the USB can be loaded on the new board
using the RESTORE SETTINGS: USB FILE.
USB Features
The HeatNet V3 control supports a USB updating system and
desktop connectivity using the HeatNet Control Pro software.
In order to ensure that a valid firmware file is always
available on the HeatNet board, (2) file storage locations are
available. A firmware file is loaded at the factory in both
locations. This is to ensure that if a bad file is loaded by the
user, the factory loaded file can be re-loaded to get the board
functional again. All updating of firmware for Touchscreen
Display applications, use the front panel USB input.
The firmware loading menu is located at; SETTINGS: LOAD
DISPLAY FIRMWARE & SETTINGS: LOAD CONTROL
FIRMWARE. The following explains the menus.
Loading the Display Firmware
Selecting the LOAD DISPLAY FIRMWARE menu allows
updating the displays application program which resides on
the display. This does not update the controls firmware. New
firmware is posted periodically on Sales Assistant or the RBI
website.
Loading the Control Firmware
Selecting USB DRIVE will read the FIRMWARE directory
on a flash drive and display any .hex files located there. The
USB flash drive needs to have a directory called “firmware”
located in the root directory. The downloaded firmware .hex
file needs to be placed there. Then the flash drive needs to be
inserted into J6 on the HeatNet control board. Follow the on-
screen prompts and then select the file using the arrow keys.
Once a file has been selected, a STORAGE LOCATION
needs to be selected. There are (2) storage locations for the
new file. Location 1 is used for normal updates and Location
0 is for the factory stored backup file. When the Storage
location (default is Location 1) is selected the file will be
loaded into a permanent storage memory location. Next, the
control will reboot and copy this new program into running
memory, reboot, load factory defaults, and then reboot again.
Selecting USB CABLE requires connecting a USB cable and
running the Firmware Update program from a PC directly to
the USB port on the control board (not the front Panel). This
process takes much longer and requires a Personal Computer
(laptop) to be taken to the boiler site. Again, follow the on-
screen prompts to download the program into a storage
location as done when using the above USB DRIVE loading
menu. You will need the HeatNet Pro software which can be
downloaded from the website.
Selecting SAVE FILE will display the currently stored files
in the storage memory locations. Use the arrow keys to select
a stored file for copying to running memory. When SELECT
is pressed the file will be marked so it will be loaded on the
next power cycle. Power cycle the boiler to begin copying the
file from stored memory to running memory.
NOTE: to access the factory backup program, the P3 BOOT
shunt on the HeatNet control board needs to be connected and
the CAL/NORMAL switch placed in the CAL position. The
BOOT jumper is located close to where the ribbon cable for
the display plugs in. If the control is power cycled in this
condition, the factory program will overwrite the existing
running program. If in the LOAD FIRMWARE menus,
STORAGE LOCATION 0 will be an allowed storage
location.
Diagnostics
The H-Net control can display and identify faults in a
meaningful way. If an interlock trips, it will be indicated in
the main screen display, along with an audible alarm
(mounted on control board) and a set of relay contacts will
close. A record of this, with a time stamp, will also be entered
into the log as an aide in the diagnosis of the event. The log
can be downloaded, and a histogram used to display the data.
If using Modbus, BACnet, or LonWorks, there are software
flag bits in registers available.
Open and shorted sensors are checked continuously, so that in
the event of a sensor failure, the system shuts down and the
alarm relay is closed. If the sensor returns to operation the
alarms are automatically cleared and operation is restored.
If a pump fails (flow switch required), or the flow switch
fails, the boiler will cycle the start condition every 10 minutes
in an attempt get the boiler restarted.
If the damper fails to open and never closes its proof switch, a
retry algorithm will attempt a retry. Every 10 minutes the
damper relay will cycle and try to open the damper again.
If the H-Net control closes the last interlock string connected
to the ignition control and the ignition control never closes its
Blower Relay, the H-Net control will wait 2 minutes. The H-
Net control will then retry for the duration of the local pump
post purge time and then retry the ignition sequence. During
this time “retry strt” will be displayed in the status screen.
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