EB 5757 EN
19
Mounting and start-up
5
Mounting and start-up
Risk of malfunction due to incorrectly per-
formed start-up.
Perform start-up following the described
sequence.
5.1
Mounting the actuator onto
the valve
Risk of actuator damage due to excessively
high tightening torques.
Observe the specified tightening torques.
The actuator has a force-locking connection
to the valve in de-energized state.
Î
Turn the handwheel (2, Fig. 1 on
page 11) counterclockwise to retract
the actuator stem as far as it will go.
Î
Place the actuator on the valve con-
nection and tighten the coupling nut
(Fig. 1 on page 11) (tightening torque
20 Nm).
5.2
Installing the control valve
into the pipeline
Degree of protection not achieved due to in-
correct mounting position.
Do not install the valve with the actuator
suspended downwards.
Î
Install the valve into the pipeline accord-
ing the specifications in the mounting
and operating instructions of the valve.
5.3 Electrical connections
Risk of electric shock.
−
Upon installation of the electric cables, you
are required to observe the regulations
concerning low-voltage installations ac-
cording to DIN VDE 0100 as well as the
regulations of your local power supplier.
−
Use a suitable power supply which guar-
antees that no dangerous voltages reach
the device in normal operation or in the
event of a fault in the system or any other
system parts.
−
Connect the actuator to the electrical net-
work only after the power supply is first
switched off. Make sure the power cannot
be switched on unintentionally.
The actuator requires a fast-response
Pt 1000 temperature sensor to be connected
for it to function.
The binary input can be used to change be-
tween the two set points W1 and W2.
Alternatively, instead of the Pt 1000 sensor,
the current input 0/4 to 20 mA can be used
for control purposes.
In addition, a water flow sensor or a flow
switch can be connected to quickly recognize
when hot water is being tapped.
Connect the ends of both connecting leads
as shown in Fig. 5 and Fig. 6.
NOTICE
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NOTICE
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NOTICE
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DANGER
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