Samson 4763, Инструкция по монтажу и эксплуатации

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5-2 EB 8359-2 EN
Installation
5.2 Preparation for installation
Before mounting, make sure the following
conditions are met:
− The positioner is not damaged.
− The air supply is not yet connected to the
positioner.
− The current is not yet connected to the
positioner.
Proceed as follows:
Î
Lay out the necessary material and tools
to have them ready during mounting.
Î
Determine the operating direction of the
positioner control loop (see sec-
tion 5.2.1).
Î
Determine on which side of the valve the
positioner is to be mounted (see sec-
tion 5.2.2).
Î
Remove the protective caps from the
pneumatic connections.
5.2.1 Determining the oper -
ating direction of the
positioner control loop
Operating direction increasing/increasing
<<
− The signal pressure p
st
rises as the input
signal p
e
(set point) rises
− The signal pressure p
st
decreases as the
input signal p
e
(set point) decreases
Operating direction increasing/decreasing
<>
− The signal pressure p
st
decreases as the
input signal p
e
(set point) rises
− The signal pressure p
st
rises as the input
signal p
e
(set point) decreases
On the flapper plate, the operating direction
is indicated by symbols (direct << , reverse
<> ). Depending on the position of the flap -
per plate, the adjusted operating direction
and the associated symbol is visible. If the
required operating direction does not corre-
spond to the visible symbol or if the operat-
ing direction is to be changed, proceed as
follows:
Î
Unscrew both screws on the cover plate
and lift off the nozzle block along with
the cover plate.
Î
Turn the nozzle block by 180° and place
it back on together with the cover plate.
Make sure that the nozzle block and
flapper plate are correctly located above
or below the feeler pin as shown in
Fig. 5-1 .
Î
Fasten the nozzle block.
5.2.2 Determining on which
side of the valve the po -
sitioner is to be mounted
The positioner is mounted on the left or right
side of the valve depending on the actuator's
direction of action and the operating direc-
tion of the positioner control loop.
Î
See Fig. 5-2 to Fig. 5-5 .
Range spring
Feeler pin
Cover plate
Nozzle block
Marking Flapper plate
Operating direction <<
Flapper plate below the feeler pin
Operating direction <>
Flapper plate on top of feeler pin
Fig. 5-1: Position of nozzle block, cover plate removed
Actuator stem extends (FA)
1
20
pst
w
1
20
pst
w
Lever (1) located at top of plate (20) Lever (1) located at bottom of plate (20)
Fig. 5-2: Operating direction << Left attachment Fig. 5-3: Operating direction <> Right
attachment
Actuator stem retracts (FE)
pst
w
pst
w
Lever (1) located at bottom of plate (20) Lever (1) located at top of plate (20)
Fig. 5-4: Operating direction << Right
attachment
Fig. 5-5: Operating direction <> Left
attachment