OPTIONAL FEATURES HeatNet Control V3
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The OR OVR (Outdoor Reset Override) input on J12A can be
used to override this Outside Air Setpoint and maintain the
water setpoint at the LOCAL or SYSTEM SETPOINT value
when a contact is closed across this input. This can be used as
a Domestic Hot Water demand input.
Another function of the OUTDOOR RESET is the
Winter/Summer mode ((W)arm (W)eather (S)hutdown). With
the WWS SETPOINT set to 72F and WARM WEATHER
SHUTDOWN set to ON, the boiler/system will enter summer
shutdown when the Outside Air temperature rises above 72F.
While in this state, the OR OVR input on J12A can be used to
bring the boiler/system on to maintain the water setpoint at
the LOCAL or SYSTEM SETPOINT value.
During WWS operation, the System pump will not be enabled
just the Local pump unless the SETTINGS: SYSTEM PUMP:
OVERRIDE ENABLED IN WARM WEATHER
SHUTDOWN is set to ON. This is the System Pump
Priority mode. When SETTINGS:SYSTEM PUMP:
OVERRIDE ENABLED IN WARM WEATHER
SHUTDOWN is set to OFF, the system pump will not come
on while in WWS with the OR OVR override input closed.
Sensors
The H-Net control supports a standard 10K thermistor (Type
ACI/10K-CP). These sensors can be calibrated to the control
by entering the sensor menu and placing a precision 10k
resistor on an input.
Immersion sensors must have wells.
There is also a provision to use a 1K platinum sensor for the
stack temperature. The 10k thermistor is limited to a usable
range of 270F, and the 1k platinum sensor to upwards of
1000F. The S5 DIP switch is used to configure one or the
other.
Stack Temperature
The version 3 control also supports an optional 1k platinum
stack sensor. If the Stack Sensor is present, a warning will
occur at 325F and greater. During the Warning condition, for
every degree F over the warning temperature of 325F, the
boiler’s input will be limited by 4% until the boiler is running
at low fire. If the SETTINGS: HEAT EXCHANGER:
ALARM TYPE: is set to” FAULT” the boiler will halt and
the Alarm relay will close when the Stack temperature
exceeds 350F. The boiler will then be allowed to restart when
the Stack temperature drops below 325F.
The Stack sensor should be a 1k ohm platinum type sensor.
Part # 0040-1300. To configure the 1k PT Stack sensor,
Switch S5.3 should be set to the NONE position and S5.4 set
to PLATINUM STACK. The sensor will then be auto-
detected after a power cycle.
Security
A password can be used to lock out control and setup features.
It can be enabled, but is shipped in the disabled state.
Save/Restore Configuration
Settings
In a complex system, there can be a multitude of settings
necessary for proper boiler operation. These settings can be
saved to the onboard memory, and/or a USB drive. SAVE
SETTINGS: ONBOARD MEMORY/USB FILE
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.
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