Eltorque QT250, Руководство пользователя

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User Manual QT250 and QT800 gen 2.5, ID 2021 2.3 20. April 2021 Page 45 of 92
Eltorque actuators can be operated in several ways:
•
As part of a system directly via IAS.
•
Via an Eltorque E-VCS which controls the unit.
• Using the E3C tool, which is described in the EC3 Manual.
• Emergency operation where you can operate the actuator manually.
•
Failsafe operation is described in Appendix A on page 61.
The control commands and procedures depend on the type of control system
that is used. In this chapter the manual emergency operation is described.
In case of power failure, control system error or another fault preventing normal
operation of the actuator, it is possible to manually operate the actuator without
the need for additional tools.
Table 10: Input and output torque for handwheel
Input torque on the handwheel Output torque on the actuator
QT250 QT800
1 Nm 75 Nm 225 Nm
2 Nm 150 Nm 450 Nm
3 Nm 225 Nm 675 Nm
4 Nm 300 Nm 900 Nm
Note!
A manual operation will most likely result in an error message in the system.
1. Remove the hand-wheel cover by grabbing the tabs and pulling it straight up.
2. Turn the hand-wheel clockwise to close or counter-clockwise to open the
valve. The valve position can be seen on the visual indicator in the centre of
the hand-wheel and reference is made to the scale, see
Figure 34: Position
scale.
3. When the manual operation is completed, refit the hand-wheel cover by
pressing it down until it stops against the actuator’s top cover.
Caution!
Do not subject the hand wheel to more than the valve MAST or maximum
4Nm on the handwheel, as you may damage the actuator or valve. Below is
a table showing approximate output torque on input torque.