Gemü 693 Original Einbau- Und Montageanleitung Seite 45

Push the indicator spindle downwards
G
and fasten the trip cam bolt so that the
trip cam actuates the roller lever of the
CLOSED limit switch = switch point.
Continue to turn the adjusting screw 4
G
1 1/2 turns clockwise (jam safety). (By
continuing to turn the adjusting screw
clockwise, it is possible to slightly reduce
the pre-tension on the diaphragm,
which will extend the service life of the
diaphragm. However, if it is turned too far,
the valve will no longer seal properly.)
Check for leaks.
G
Fix the CLOSED limit switch in position
G
with limit switch fixing screws 5.
2. Setting the OPEN limit switch:
(Prerequisite: valve body and diaphragm are
already mounted, CLOSED limit switch set
as shown on left.)
Loosen the limit switch fixing screws 6,
G
but do not remove them (Philips head
PH 1).
Move the actuator in the OPEN direction
G
past the CLOSED limit switch and then
back into the CLOSED position until the
CLOSED limit switch cuts out.
Move the OPEN limit switch upwards
G
as far as the limit stop by turning the
adjusting screw 3 clockwise (3 mm flat
head).
Move the actuator in the OPEN direction
G
until the stroke length in the table below
is reached and switch off immediately
→ stroke length must correspond exactly.
Move the OPEN limit switch downwards
G
until the switch point is reached (audible
click) by turning the adjusting screw 3
anticlockwise.
Fix the OPEN limit switch in position with
G
limit switch fixing screws 6.
DN:
Stroke length in mm: 7.9
6 3
OPEN limit switch
Roller lever
3. Setting the potentiometer
(functional module AP):
(Prerequisite: valve body and diaphragm are
already mounted, CLOSED limit switch and
OPEN limit switch are set as described on
the previous page.)
a) Installing the potentiometer:
To install the potentiometer support plate,
G
loosen the 4 motor mount screws.
Slide support plate between
G
(attention: do not lift the motor too far
→ the toothed belt will otherwise slip off).
Replace the long bolts with short bolts
G
(on the potentiometer).
b) Setting the potentiometer:
In the condition as supplied to customer,
G
the potentiometer is swivelled away from
the actuator drive.
Connect supply voltage to terminal 2 (L)
G
and terminal 3 (N)
→ actuator moves into CLOSED position
until limit switch cuts out.
Gently turn the toothed gear of the
G
potentiometer (DN 50: bottom toothed
gear) clockwise as far as it will go.
Turn the toothed gear 3 teeth back.
G
45 / 64
15/25 32/40 50
13.2 17.7
4 5
CLOSED limit switch
Lower spindle guide
693, 698