Samson 3374 Mounting And Operating Instructions - Transmitters
28
EB 8331-3 EN
Additional functions
6.2 Resistance transmitters
6.2.1 Installing the resistance
transmitters
An actuator board with the corresponding
resistance transmitters and gear wheels is re-
quiredforaresistancetransmitterretrofit.
Which actuator board is to be used depends
on the actuator type designation as well as
thepowersupplyandtransittimespecifica-
tions(seeTable 6onpage 37).
If the actuator does not have limit contacts,
anadditionalretrofitkit(seeFig. 9onpa-
ge 23)isrequired.
6.2.2 Retrofitting (without limit
contacts)
1. Unscrew fastening screws. Slide the actu-
ator board (12) from its guiding to the
right. Slightly lift the board and continue
pushing it further towards the cable
entry.
2. Clip the spindle gear (2) onto the sleeve
(13). Make sure the latch is properly en-
gaged in the groove of the sleeve. Slide
the 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 the
spindle 3 (11.3), ensuring that the long
wire of the tension spring rests on the in-
termediate gear (1) and that the short
wire of the spring is located between
spindle 3 (11.3) and spindle 4 (11.4).
Mount the shim (10) on spindle 2 (11.2).
Place the serrated ring (6) and push it
down as far as it will go.
4. The resistance transmitter gears (22 and
23)fittedwithserratedringsmustbeput
onto their shafts to correspond with the
rated travel of the valve. The rated travel
inscription 'A' 30 mm for rated travel or
'B'for15 mmratedtravelmustbelegib-
le(seeFig. 17onpage 31).
5. Slide the actuator board (12) into its gui-
ding. Make sure that the gears are pro-
perly engaged. Fasten the board using
screws.