Samson 3731-5, Mounting And Operating Instructions

Page: 42 / 112

42 EB 8387-5 EN
Mounting and start-up
5.8.1 Reversing amplifier
(1079-1118 or 1079-
1119)
Î
Do not unscrew the sealing plug (1.5) out
of the reversing amplifier.
1. Screw the special nuts (1.3) from the ac-
cessories of the reversing amplifier into
the boreholes of the positioner. Remove
the rubber gasket (1.4).
2. Insert the gasket (1.2) into the recess of
the reversing amplifier and slide both the
hollowed special screws (1.1) into the
connecting boreholes A
1
and Z.
3. Place the reversing amplifier (1) and
screw tight using both the special screws
(1.1).
4. Use a screwdriver (8 mm wide) to screw
the enclosed filters (1.6) into the connec-
tion boreholes A
1
and Z.
On start up of double-acting actuators, the
following settings as described in section 7
must be made:
− Pressure limit (Code 16) = 'No'
− Fail-safe position (Code 0) = 'AtO' (AIR
TO OPEN)
Pressure gauge attachment
The mounting sequence shown in Fig. 11 re-
mains unchanged. Screw a pressure gauge
bracket onto the connections A
1
and Z.
Pressure gauge
bracket G ¼ 1400-7106
¼ NPT 1400-7107
Pressure gauges for supply air Z and output
A
1
as listed in Accessories in section 3.3.
Note