SNS20-28C Actuator with Internal Battery Back-up Installation, Operation & Maintenance Manual
Page 12
ACTUATOR SET-UP FOR STANDARD OPEN/CLOSE ACTUATOR:
After the actuator is mounted mechanically to the valve and the external electrical wiring is
complete, the actuator is ready for set up. The actuator cover will need to be removed, if not
already done so.
1) On the circuit board, move the “Fail Switch” to the desired “FAIL” position. The description
of the 2 positions are as follows:
OPEN
= ACTUATOR WILL MOVE TO THE OPEN POSITION WHEN POWER FAILS.
CLOSE
= ACTUATOR WILL MOVE TO THE CLOSE POSITION WHEN POWER FAILS.
WARNING: DO NOT switch the FAIL switch while the actuator is moving or while the
battery is plugged into the SNS board. Turn OFF power before moving switch!
2) Plug the battery connector into the 2 pin BATTERY header on the SNS Board.
NOTE:
If the “Fail Switch” was moved to the “CLOSE” position, the actuator will begin to move to the Close
location since the actuator is shipped in the OPEN Position.
OPEN &
CLOSE LEDs
Fail Switch –
Slide to
the desired position
Battery Connector –
Plug the battery
connector into the 2 pin
BATTERY header on
the board.
Battery Status
LEDs
