Floating / Proportional Spring Return Actuators:

When power is applied to the actuator, there is a 3-second delay before the solenoid latches and the gear train is engaged. Upon power loss, the solenoid releases after 2 seconds, allowing the actuator to spring return to normal position. This prevents the loss of valve position during brief outages. The spring return feature should not be used for routine, normal operation.

Proportional Spring Return and Non-Spring Return Actuators:

The control signal input and action is selected by means of the input signal jumper on the actuator circuit board. All actuators are shipped with the input signal jumper set for a 0 to 10 Vdc control signal and the control action jumper set for the direct action (DA; valves opens with increasing control signal). Multiple actuators may be connected to a simple controller. Do not exceed the maximum current draw of the controller or transformer. When using a 4 to 20mAdc control signal, a separate isolation transformer must be used with each valve. Proportional Actuators perform a self-calibration cycle on power-up. The actuator will run to the open direction for approximately 20 seconds and then closed direction for approximately 2-1/2" min (60 Hz) pr 3-1/2 min (50 Hz). Once this cycle is complete, the actuator will then accept and respond to the control signal. Manual positioning of the actuator while power is applied is NOT recommended. If the actuator is manually positioned while power is applied, the calibration cycle will need to be completed again for the actuator to function properly. To recalibrate the actuator, cycle power off for more than 6 seconds.

Floating Spring Return and Non-Spring Actuators:

Spring Return and Non-Spring Return actuators with time-out will automatically limit the running time of the actuator. The time-out feature automatically cuts off the control signal to the valve after three minutes of continuous operation. Upon change in control signal direction, the actuator will resume operation. The controller or thermostat used to operate the Non-Spring Return Floating actuator must be configured to turn off the control signal after being continuously on for three minutes. Multiple actuators may be connected to a single controller. Do not exceed the maximum current draw of the controller or transformer.