Samson TROVIS 3730-1, Translation Of Original Instructions

Page: 42 / 144

5-8 EB 8484-1 EN
Installation
b) Type 3277 Actuator
Î
Actuators with 175 to 750 cm² (Fig. 5-9)
Î
Required mounting parts and accesso -
ries: Table 5-6 on page 5-41.
Î
Observe travel tables on page 5-4.
1. Seal the signal pressure output at the
back of the positioner with the screw
plug (4, order no. 0180-1254) and the
associated O-ring (order no. 0520-
0412) if the screw plug is not yet in
place.
2. Place follower clamp (3) on the actuator
stem, align it and screw tight so that the
mounting screw is located in the groove
of the actuator stem.
3. Mount cover plate (10) with narrow side
of the cut-out (Fig. 5-9, on the left) point -
ing towards the signal pressure connec-
tion. Make sure that the gasket (14)
points towards the actuator yoke.
4. Check the pin position of the follower pin
(2) on M lever (1). Refer to travel tables
for type of attachment. If necessary,
change the pin position (see section 5.4).
5. Insert molded seal (15) into the groove of
the positioner housing.
6. Place positioner on the cover plate in
such a manner that the follower pin (2)
rests on the top of the follower clamp (3).
Adjust the lever (1) correspondingly and
open the positioner cover to hold the po-
sitioner shaft in position at the shaft lock
(Fig. 5-5). The lever (1) must rest on the
follower clamp with spring force.
Fasten the positioner on the cover plate
(10) using the two fastening screws.
7. Make sure that the tip of the gasket (16)
projecting from the side of the connec-
tion block is positioned to match the ac-
tuator symbol for the actuator's fail-safe
action "actuator stem extends" or "actu-
ator stem retracts". If this is not the case,
unscrew the three fastening screws and
lift off the cover. Turn the gasket (16) by
180° and re-insert it.
8. Place the connection block (12) with the
associated seals against the positioner
and the actuator yoke and fasten using
the screw (12.1). For actuators with fail-
safe action "actuator stem retracts", ad-
ditionally remove the stopper (12.2) and
mount the external signal pressure pipe.
9. Mount cover (11) on the other side.
Make sure that the vent plug is located at
the bottom when the control valve is in-
stalled to allow any condensed water
that collects to drain off.
5.6.2 Attachment according to
IEC 60534-6
Î
Required mounting parts and accesso -
ries: Table 5-7 on page 5-42.
Î
Observe travel tables on page 5-4.
Î
See Fig. 5-10
2
10 14 15
1 2 3 11 11.1
B
1.1
1.2
12.1 12 16 12.2
SUPPL
Y
G
G 3/8
A
Cut-out of cover plate (10)
View A
View B
extends retracts
Actuator stem
1 Lever
1.1 Nut
1.2 Disk spring
2 Follower pin
3 Follower clamp
10 Cover plate
11 Cover
11.1 Vent plug
12 Connection block
12.1 Screw
12.2 Stopper or connection for external piping
13 Switch plate
14 Gasket
15 Molded seal
16 Gasket
Fig. 5-9: Direct attachment – Signal pressure connection for Type 3277 Actuator with 175 to 750 cm²