ENG
| Instruction Manual
LK 950 Valve Actuator
TECHNICAL DATA
Voltage*
230 VAC 50/60 Hz
24 VAC 50/60 Hz,
24 VDC/AC 50/60 Hz
Power consumption*
1.5 - 3.5 W
Dimensioning*
1.5 - 3.5 VA
Ambient temp.
Min. 0 °C/Max. 50 °C
Angle of rotation
90°, electrically limited
Torque*
5/10 Nm
Operation time*
35/70/140/280 s
Direction of operation
Selectable
Position indication
Reversible scale
Manual override
Disengagement of gears
Electrical connection*
Cable 1.5 m, 3 x 0.75 mm²
Sound level
Max. 35 dB(A)
Storage temperature
-10 °C ... 80 °C
Protection type
IP 40
Protection class
II (Double Insulated)
III (SELV)
Type Approval certificate
(See Declaration of conformity)
*= depending on model
FUNCTIONAL DESCRIPTION
LK 950 is a series of compact actuators designed to motorize rota-
ry mixing valves. The actuator can be operated by a controller with
a 3-point SPDT output. LK 950 fits most rotary valves. Alternative
mounting kits and an additional auxiliary adjustable switch can be
supplied as option. The actuator can be mounted in any position
except below the valve. Thanks to its small size and compact form
the LK 950 fits most installations. The actuator is mounted directly
onto the valve spindle with a screw. An anti-rotation bolt is screwed
onto the valve. The angle of rotation is limited to 90°. When the actu-
ator reaches either end position the voltage supply is interrupted by
limit switches. The actuator can be put into manual mode by turning
the button on the housing cover which will disengage the gears. The
actuator can now be put in any position by turning the handle on the
front and this position is indicated by means of a reversible scale.
3
L1
N
1
2
0
LK 950 3-punkt
~
3-point control
D
E
F
A
B
C
G
INSTALLATION
1. Turn the spindle of the valve A counter clockwise to the end posi-
tion (OPEN or CLOSED). Remove the handle supplied with the valve
body from the valve spindle.
2. Screw the anti-rotation stop B in a convenient hole on the valve (if
necessary remove an existing screw).
3. Slide the linkage C over the valve spindle.
4. Place the actuator D onto the linkage C and if necessary rotate
it slightly clockwise until the antirotation stop B engages in the
slot of the actuator (the actuator is supplied in the anti-clockwise
position).
5. Turn the scale E into the position relevant to the requested func-
tion (OPEN/ CLOSED) and place it onto the actuator.
6. Place the handle F onto the actuator ensuring that the arrow
points to the left end position of the scale. Tighten the whole unit
by means of the screw G.
7. Using a screwdriver (No. 3) turn the disengaging button on the
housing cover from «A» to «Hand Symbol» position and rotate the
valve by means of the handle F from one end position to the other.
It is important that the actuator can be moved from one end stop
to the other (90°).
8. Connect the actuator to the power supply.
9. Turn the disengaging button back to the«A» position and the
actuator will turn in the required position.w
WIRING DIAGRAM
Warning! Risk of personal injury!
Before starting installation work the power supply must
be disconnected. Make sure to adhere to valid safety regulations.
1
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