Samson 3374 Series - Annex B; Parts for Retrofitting and Accessories

7-8 EB 8331-4 EN
Start-up and conguration
7.4 Adjusting the limit contacts
To undo the screws on the housing cover, use a POZIDRIV
®
PZ2 screwdriver to get enough
hold on the screw heads.
Mechanical limit contacts (seeFig.7-6)
1. Undo screws on housing cover and take the cover off the actuator.
2. Switch on supply voltage.
3. Move the valve, using manual override or the "manual level" operating mode, to the
point at which the contact should react.
4. Usea4mmhexwrenchtoturnthespindleoftheadjustmentgears(18)fortheupper
limit contact or for the lower limit contact until the associated contact cam (19) of the con-
tact cam unit (21) triggers the switch contact of the upper or lower microswitch on the ter-
minal board (17).
5. Replacecover.Brieyturnthefasteningscrewscounterclockwisewithascrewdriverto
center them. Then fasten down the cover by tightening the screws.
Electronic limit contacts
The electronic limit contacts are adjusted at the operating controls of the actuator (see An-
nexA).
Note