Samson 3767 - Servicing

EB 8355-2 EN 9-1
Servicing
9 Servicing
The work described in this section is only to
be performed by personnel appropriately
qualiedtocarryoutsuchtasks.
Risk of fatal injury due to the ignition of an
explosive atmosphere.
Î Observe EN60079-14 (VDE0165,
Part1) for work on the positioner in haz-
ardous areas.
Î Work in hazardous areas must only be
performed by personnel who has under-
gone special training or instructions or
who is authorized to work on explo-
sion-protected devices in hazardous ar-
eas.
Intrinsic safety rendered ineffective in in-
trinsically safe devices.
Î Only connect intrinsically safe devices in-
tended for use in intrinsically safe circuits
to certied intrinsically safe input-con-
nected units.
Î Do not place intrinsically safe devices
back into operation that were connected
to intrinsically safe input-connected units
without certication.
Î Do not exceed the maximum permissible
electric values specied in the EC type
examination certicates when intercon-
necting intrinsically safe electrical equip-
ment (U
i
or U
0
, l
i
or I
0
, P
i
or P
0
, C
i
or C
0
and L
i
or L
0
).
DANGER
!
WARNING
!
Crush hazard arising from actuator and
plug stem moving.
Î Do not touch any moving valve parts
while the control valve is in operation.
Î Before performing any mounting or in-
stallation work on the positioner, put the
control valve out of operation by discon-
necting and locking the supply air and
control signal.
Î Do not impede the movement of the actu-
ator and plug stem by inserting objects
into the yoke.
Î
The positioner was checked by SAMSON
before it left the factory.
− The product warranty becomes void if
service or repair work not described in
these instructions is performed without
prior agreement by SAMSON's Af-
ter-sales Service.
− Only use original spare parts by
SAMSON, which comply with the
originalspecications.
The positioner does not require any mainte-
nance.
Î Observe the maintenance instructions of
any upstream supply air pressure reduc-
ing stations.
WARNING
!