ABB AV3 Instruction Manual page 49

OPERATING PROCEDURES
EQUALIZING AND AIR SUPPLY SHUTOFF VALVE
5 - 2
2. If manual operator does not lock the actuator is position:
a. The actuator must be positioned from prior knowledge of
the position versus signal or the actuator may jump when
transferred to automatic.
b. Push the valve handle in and turn to AUTO position.
3. If the manual operator locks the actuator is position:
a. Depress valve handle and turn to AUTO position. Actuator
will oppose manual operator if drive position and input signal
do not correspond.
b. Manually operate the actuator until the load on manual
operator decreases. If output pressure gages are installed on
the position, gage reading should equalize.
NOTE: If in Step 3 it is desired that the drive stay in its initial
position, the input signal must be adjusted to correspond with
drive position as indicated by the load on manual operator, out-
put pressure gages, or prior knowledge of position versus input
signal.