Johnson Controls ERA1600 Bedienungsanleitung Seite 27

111 6041 050 E
Model with feedback potentiometer and auxiliary switch:
The nominal potentiometer value is measured between terminals 10 and 12 with the actuator stem extended.
The cams for the auxiliary switches S3 and S4 are positioned just before the valve end positions and are free
for user application. The S3 auxiliary switch is operated when the actuator stem is extended and S4 auxiliary
switch when the actuator stem is retracted.
Due to tolerances in the valve stroke, it may be necessary to carry out setting adjustments.
The position of the
transfer bolt must
correspond to the valve
stroke.
The friction clutch on the potentiometer shaft allows the shaft to be adjusted, using a screwdriver. Make
electrical connection to terminal 1 and 2. After driving the actuator to the end position, connect voltmeter to
terminals 10 and 11. Using a screwdriver set the potentiometer to 0 Ohm. Drive the actuator in the opposite
direction and in the end position read the resistance value. If the nominal value has been reached before the
end position or has not been reached before the end position, correct the transfer bolt position by sliding it in
the appropriate direction (see sketch). Drive the actuator to end positions again to test.
Slide the transfer bolt in this direction if the
potentiometer nominal value is reached before
the valve stroke end position.
Slide the transfer bolt in this direction if the
potentiometer nominal value is not reached
9 E