Woodward ProAct Integrated Speed Control (PISC) Integrated Throttle Body model 8235-351 is used in conjunction with a PISC III actuator. Models with a PISC III actuator require base mounting due to its greater mass, but in some cases can be flange mounted as long as the vibration level has been assessed to ensure a low level of stress on the unit. When the unit is mounted a minimum gap of .5 millimeters is required to provide proper support between the electronics enclosure and mounting bracket.
While being operated the 8235-351 model may experience errors involving the governor. If the engine refuses to start several issues could occur which are as follows; verify that the power supply is present at the proper governor terminals, ensure that the “open for shutdown” application contact is securely closed, and make sure that the start fuel limit on the governor is not averting the proper airflow needed. When attached to the appropriate actuator the PISC model can be set up to operate as a position control, but only for the most basic actuator applications.
When the 8235-351 and PISC actuator are connected and the power supply has been connected the actuator can be operated immediately, and power between the control and the engine can be initiated simultaneously. During an engine shutdown operation, the engine shutdown solenoid or solenoid valve within the fuel supply must be de-activated and the power supply must be disengaged from the speed control.
If any questions arise during operation please refer to the attached manuals. Manual 26265 contains information on troubleshooting errors for the 8235-351 unit in chapter three beginning on page thirteen.