About the 9905-144
Control model 9905-144 is a speed control from Woodward’s 2301A series. This control is a low-voltage and forward-acting model. The setting of the actuator potentiometer for voltage is different on the forward acting control than on the reverse; the forward acting controls actuator voltage should be set ten percent higher than whatever the voltage for the rated speed was read at. In reference to the rated speed, preliminary settings for this potentiometer should be set to the absolute minimum; this means the potentiometer will be sitting fully counterclockwise on your control.
If using an SPM (speed and phase matching) synchronizer, connect the wires to terminals twenty-five and twenty-six, the positive lead must be connected to terminal twenty-five, and the negative lead must be connected to terminal twenty-six, then using a shielded wire, connect to terminal twenty-seven. It is important to note that the shield should never be connected to the synchronizer. Please advise that the SPM synchronizer is not required for the 9905-144 control to function it is only optional.
Be advised that during the operation of the prime mover and the 9905-144 control, if an error occurs, take caution and make an emergency shutdown of the prime mover; doing so prevents property damage and runaway of the prime mover. It is highly recommended that with the operation of the prime mover and control, an external overspeed shutdown device should be used to assist with the shutdown if the prime mover begins to overspeed; overspeeding of the prime mover can result in a runaway and injury.
