Samson TROVIS 3730-3 Mounting And Operating Instructions page 52

Installation
extends
12 Connecting plate
13 Adapter block
Fig. 5-13: Fail-safe action
10. Mount the adapter block (13) together
with the connecting plate (12) to the ac-
tuator using the screws (13.1).
11. Insert the vent plug (11.1) into the Exh.
connection.
12. For fail-safe action "actuator stem ex-
tends", seal the Y1 port with a blanking
plug.
For fail-safe action "actuator stem re-
tracts", connect the Y1 port to the signal
pressure connection of the actuator.
13. Place positioner on the adapter block
(13) in such a manner that the follower
pin (2) rests on the top of the follower
clamp (3). Adjust the lever (1) corre-
spondingly and open the positioner cov-
er to hold the positioner shaft in position
at the shaft lock (Fig. 5-5). The lever (1)
must rest on the follower clamp with
spring force.
14. Fasten the positioner to the adapter block
(13) using the two fastening screws (6.3).
5-16
Actuator stem
retracts
Z
12
13
Z
Make sure the molded seal (6.2) is prop-
erly seated.
15. Mount cover (11) on the other side to the
yoke. Make sure that the vent plug is lo-
cated at the bottom when the control
valve is installed to allow any condensed
water that collects to drain off.
Attachment according to VDI/VDE 3847 to
a NAMUR rib (see Fig. 5-14)
Î Required mounting parts and accesso-
ries: Table 5-8 on page 5-51.
Î Observe travel tables on page 5-4.
1. Series 240 Valves, actuator size up to
1400-60 cm²: Screw the two bolts (14)
to the bracket of the stem connector or
directly to the stem connector (depending
on the version), place the follower plate
(3) on top and use the screws (14.1) to
fasten it.
Type 3251 Valve, 350 to 2800 cm²:
Screw the longer follower plate (3.1) to
the bracket of the stem connector or di-
rectly to the stem connector (depending
on the version).
Type 3254 Valve, 1400-120 to 2800
cm²: Screw the two bolts (14) to the
bracket (16). Fasten the bracket (16) on-
to the stem connector, place the follower
plate (3) on top and use the screws
(14.1) to fasten it.
Mount the positioner on the NAMUR rib
as shown in Fig. 5-14.
2. For attachment to the NAMUR rib, fas-
ten the NAMUR connection block (10)
directly into the existing yoke bore using
EB 8484-3 EN