2
auThOrizeD use
non-intended use of the feedback head type 8685 and the
control head type 8686 may be a hazard to people, nearby
equipment and the environment.
The device is designed to be mounted on pneumatic actuators of
process valves for the control of media.
▶ Do not expose the device to direct sunlight.
▶ Use according to the authorized data, service and operating
conditions specified in the contract documents and operating
instructions. These are described in the chapter on "6 Technical
data".
▶ The device may be used only in conjunction with third-party
devices and components recommended and authorized by
Bürkert.
▶ In view of the large number of options for use, it is essential
prior to installation to study and, if necessary, to test whether
the feedback head or control head is suitable for the specific
application case.
▶ Correct transportation, storage, and installation, as well as care-
ful use and maintenance are essential for reliable and faultless
operation.
▶ Use the device only as intended.
2.1
restrictions
If exporting the system/device, observe any existing restrictions.
6
English
Type 8685 / 8686
Authorizeduse
3
Basic safeTy insTrucTiOns
These safety instructions do not make allowance for any
• contingencies and events which may arise during the assembly,
operation and maintenance of the devices.
• local safety regulations – the operator is responsible for observing
these regulations, also with reference to the installation personnel.
risk of injury from high pressure in the equipment/device.
▶ Before working on equipment or device, switch off the pressure
and deaerate/drain lines.
risk of electric shock.
▶ Before working on equipment or device, switch off the power
supply and secure to prevent reactivation.
▶ Observe applicable accident prevention and safety regulations
for electrical equipment.