KSB EA-C, Installation & Operating Manual, Page: 24 / 44

6 Commissioning/Start-up/Shutdown
24 of 44
EA-C
4. The green LED (2) lights up continuously.
ð The actuator has now been commissioned and is ready for operation.
5. Close the actuator cover or the terminal box cover, depending on the design.
( ð Section 5.4, Page 16)
6.2.2 Mechanical commissioning of 3-point actuators
ü Check whether the terminal box cover or the actuator cover needs to be
dismantled, see the selection table. (
ð Section 5.2, Page 13)
1. Dismantle the terminal box cover or the actuator cover, depending on the
design. ( ð Section 5.4, Page 16)
2. Use the handwheel to move the actuator to the middle of the valve travel.
3. Operate the actuator in both directions using the actuating signals until the
respective limit switches stop the actuator.
4. If limit switching is not correct, re-adjust the limit switches.
( ð Section 5.7, Page 21)
5. The green LED (2) is lit.
6. Close the actuator cover or the terminal box cover, depending on the design.
( ð Section 5.4, Page 16)
6.3 Operating limits
6.3.1 Ambient temperature
Observe the following parameters and values during operation:
Table 6: Permissible ambient temperatures
Ambient condition Value
Ambient temperature -20 °C to +60 °C
Humidity 5 % to 95 % rH
6.4 Shutdown
1. Disconnect the equipment from the power supply.
ð If a power back-up unit is fitted, the stem moves into the set limit position.
2. Secure against unauthorised start-up.
ð If a power back-up unit is fitted, allow the capacitors to fully discharge
before further work is done. The discharge time is 3 hours.
6.5 Returning to service
After maintenance work has been carried out on the actuator and/or valve during
which the stem coupling and disc spring stack were dismantled, the following points
must be observed after proper reassembly.
▪
An initialisation run must always be performed for continuous-action actuators.
(
ð
Section 6.2.1, Page 23)
▪ The limit switches of 3-point actuators must be checked. ( ð Section 5.7, Page 21)