Samson Type 3374 Mounting And Operating Instructions

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28 EB 8331-3 ENAdditional functions6.2 Resistance transmitters6.2.1 Installing the resistancetransmittersAn actuator board with the correspondingresistance transmitters and gear wheels is re-quired for a resistance transmitter retrofit.Which actuator board is to be used dependson the actuator type designation as well asthe power supply and transit time specifica-tions (see Table 6 on page 37).If the actuator does not have limit contacts,an additional retrofit kit (see Fig. 9 on pa-ge 23) is required.6.2.2 Retrofitting (without limitcontacts)1. Unscrew fastening screws. Slide the actu-ator board (12) from its guiding to theright. Slightly lift the board and continuepushing it further towards the cableentry.2. Clip the spindle gear (2) onto the sleeve(13). Make sure the latch is properly en-gaged in the groove of the sleeve. Slidethe intermediate gear (1) onto the spind-le 1 (11.1), mount the serrated ring (3)and push it down as far as it will go.3. Place the tension spring (4) onto thespindle 3 (11.3), ensuring that the longwire of the tension spring rests on the in-termediate gear (1) and that the shortwire of the spring is located betweenspindle 3 (11.3) and spindle 4 (11.4).Mount the shim (10) on spindle 2 (11.2).Place the serrated ring (6) and push itdown as far as it will go.4. The resistance transmitter gears (22 and23) fitted with serrated rings must be putonto their shafts to correspond with therated travel of the valve. The rated travelinscription 'A' 30 mm for rated travel or'B' for 15 mm rated travel must be legib-le (see Fig. 17 on page 31).5. Slide the actuator board (12) into its gui-ding. Make sure that the gears are pro-perly engaged. Fasten the board usingscrews.