AFRC Setup

Video available for this topic: https://www.youtube.com/watch?v=PAmjcq7CPt0

Engine Condition

For proper AFRC operation, it is critical that the engine be in good operational status. Verify the following before running the AFRC:

• Valves are adjusted to factory specification
• Spark plugs are properly gapped and in good condition
• Cylinders have good compression
• Mixers are in good condition and regulator fuel pressure is set to factory specification
• Fuel connections are secure and leak-free
• Ignition system functioning correctly and timing set appropriately for fuel composition

Controller Setup

While the engine is not running, perform the following steps to prepare the controller for operation:

• AFRC module is installed and wired
• Digital power valve(s) are installed
• Run signal source is properly connected
• Run signal source is properly selected on the Run Signal Trigger screen (Pg. 10)
• Fuel connections are secure and leak-free
• Enter Setup or Engineering mode on the controller by entering the appropriate password
• Set the “Control” button on the AFRC Home screen to “Manual”

The engine can now be started.

Sensor Setup

The AFRC Advanced has the following optional sensor inputs available for process monitoring, run signal, and mapping:

• Manifold Pressure Sensors (two available)
  • Manifold Press Left" and "Manifold Press Right"
  • Single bank configurations utilize the "Manifold Pressure Left" input
  • Sensors are pre-configured for the system and can only be enabled or disabled
• Analog (one available)
  • "ANALOG"
  • Configurable to 0-5V, 1-5V, or 4-20mA
• Oil Pressure Switch (one available)
  • "Oil Press Switch"
  • Pre-configured as normally open (N/O) and can only be enabled or disabled
• Thermistor (one available)
  • "Ambient"
• Thermocouple (one available)
  • "Manifold"
  • Type-K thermocouple only
• Magnetic Pickup (one available)
  • "RPM"
  • 1-100 Volts

These sensors are set up under the Main Setup of the AFRC.

Configuring the Analog Input

For the general purpose “ANALOG” input, go to the Sensor Setup slide of the AFRC main setup. The following fields are required:

• Name – Label of the sensor that will be displayed within the AFRC’s user interface
• Units – Units of the sensor
• Type – 4-20mA, 0-5 Volt, or 1-5V sensor output type
• Low Scale – Lowest output value of the sensor
• Full Scale – Highest output value of the sensor

Configuring RPM

The RPM input is configured by providing the pulses per revolution.

Run Signal

By default, the run signal selection is set to “Auto-Detect”, which scans enabled sensors for each module. The AFRC Advanced has three applicable inputs:

• Pre-catalyst thermocouple (terminals 24 and 25)
• Oil pressure switch (terminals 39 and 40)
• RPM (terminals 17 and 18)

If an AFRC Lite is installed, the only available run signal trigger sensor available is the pre-catalyst thermocouple (terminals 21 and 22).

Finally, the Ignition state can be used to determine run signal, if the ignition is in a running state the signal is set to Run.

ALARM SETUP

Up to eight (8) custom alarms can be configured on the AFRC to display within the Alarms screen (Pg. 40) or to trigger an external alarm though the error relay (terminal 6).

Configuring alarms is done on the Alarm Setup screen under Settings -> AFRC through the following parameters:

• Sensor – Input or condition to be monitored
• Only enabled sensors are available for selection
• Min – Minimum trigger value (optional)
• Max – Maximum trigger value (optional)
• Duration – Time, in seconds, for the sensor reading to either be below the minimum trigger value or above the maximum trigger value to become active
• Action – Action to take when alarm becomes active
• Warning – Displays the alarm within the Alarms screen (Pg. 40) and flashes the “Alarms” button on the footer of the display
• Shutdown – Closes the error relay (terminal 6), displays the alarm within the Alarms screen (Pg. 40), and flashes the “Alarms” button on the footer of the display

It is optional to select both “Min” and “Max” values, but at least one must be selected for sensor monitoring alarms. Selecting both values is available for monitoring a condition within a window, if desired.

Upon selecting the necessary information, the alarm is enabled by toggling the “Enable” toggle box next to the sensor’s name.

Note: Modifying an existing alarm requires the “Enable” toggle box to be toggled off and back on to take effect.

Note: A sensor can be placed in two alarm rows. For example, a PostCat TC alarm could be configured to shutdown at 1250, and generate a warning at 1000.