Operation; Manual Override; Servicing; Exchanging Solenoid Pilot Valves - Samson 3965 Mounting And Operating Instructions

Operation

6 Operation
The solenoid valve island is ready for use
when mounting and start-up have been com-
pleted.

6.1 Manual override

The solenoid pilot valves can optionally be
fitted with manual override (3). See Fig. 9.
When a nominal electric signal is not con-
nected, the solenoid pilot valve can actuated
at the pushbutton/switch using a screwdriver
(4.5 mm blade width).
We recommend using devices without man-
ual override for safety circuits.

7 Servicing

Note
The solenoid valve island was checked by
SAMSON before it left the factory.
− The product warranty becomes void if ser-
vice or repair work not described in these
instructions is performed without prior
agreement by SAMSON's After-sales Ser-
vice department.
− Only use original spare parts by
SAMSON, which comply with the original
specifications (see Data Sheet u T 3965)
42
7.1 Exchanging solenoid pilot
valves
The solenoid pilot valves can be replaced
with new ones in the event of malfunction. In
this case, replace the seal with restriction
since it is not possible to check on site wheth-
er the restriction still functions properly.
7.1.1 Exchanging solenoid
pilot valves with single
connector
Solenoid pilot valves with single connector
can be exchanged as follows (see Fig. 18):
1. Disconnect the power supply.
2. Loosen the fastening screw on the metal
contacts of the solenoid pilot valve and
pull off the cable socket.
3. Unscrew the self-tapping screw (2) and
remove the holder (1). Remove the defec-
tive solenoid pilot valve from the poppet
valve.
Note
A Torx TX 9 screwdriver is required for the
self-tapping screw.
4. Use a needle to pull the seal with restric-
tion (5) out of the poppet valve flange.
Renew it.
5. Fasten the new solenoid pilot valve using
the holder (1) and self-tapping screw (2)
to the poppet valve.
EB 3965 EN