Table Of Contents - Samson 3274 Mounting And Operating Instructions

1 General safety instructions .............................................................................4
2 Technical data ...............................................................................................5
3 Design and principle of operation ..................................................................7
3.1 Versions ........................................................................................................7
3.2 Principle of operation .....................................................................................8
3.3 Accessories ...................................................................................................8
3.3.1 Positioner ....................................................................................................10
3.3.2 Position transmitter .......................................................................................10
3.3.3 Resistance transmitters ..................................................................................10
3.3.4 Mechanical limit contacts ..............................................................................10
3.3.5 Priority circuit ..............................................................................................10
3.3.6 Heating .......................................................................................................10
4 Installation ..................................................................................................11
4.1 Mounting position ........................................................................................11
4.2 Assembling valve and actuator .....................................................................12
5 Electrical connections ...................................................................................14
6 Manual operation of actuator ......................................................................18
6.1 Version with electric override ........................................................................18
6.2 Version with mechanical override ..................................................................20
7 Operation ...................................................................................................21
7.1 Positioners ...................................................................................................21
7.1.1 SW1: Priority circuit .....................................................................................22
7.1.2 SW2: Direction of action ..............................................................................22
7.1.3 SW3/SW4: Position feedback signal .............................................................22
7.1.4 Calibrating the positioner for direction of action increasing/increasing (>>) or in-
creasing/decreasing (<>) .............................................................................23
7.1.5 Using the positioner as a position transmitter ..................................................25
7.2 Calibrating the position transmitter ................................................................26
7.3 Adjusting the resistance transmitters ..............................................................27
7.4 Adjusting the limit contacts ...........................................................................28
8 Dimensions in mm .......................................................................................29
8.1 Actuator with mechanical override ................................................................29
8.2 Actuator with electric override .......................................................................30
EB 8340 EN
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