9.
Operation and control of actuator
Hot surfaces, e.g. possibly caused by high ambient temperatures or strong
direct sunlight!
Risk of burns
→
Verify surface temperature and wear protective gloves.
9.1.
Manual operation
For purposes of setting and commissioning, in case of motor or power failure, the
actuator may be operated manually. Manual operation is engaged by an internal
change-over mechanism.
Manual operation is automatically disengaged when motor is started again. The
handwheel does not rotate during motor operation.
9.1.1.
Manual valve operation
Damage at the manual change-over mechanism/motor coupling due to faulty
operation!
→
Engage manual operation only during motor standstill.
→
Do NOT use extensions as lever for operation.
Procedure
1.
Press push button.
2.
Turn handwheel in desired direction.
Figure 58:
➥
The valve closing and opening directions are marked on the handwheel.
Table 16: Example for clockwise closing
→
For valve opening, turn handwheel in direc-
tion of the arrow with the
symbol.
→
For valve closing, turn handwheel in direc-
tion of the arrow with the
symbol.
Drive shaft (valve) turns counterclockwisein
direction OPEN.
Drive shaft (valve) turns clockwise in direction
CLOSE.
Overload protection for
manual operation
To protect the valve, an overload protection is available as option for manual
operation. If the torque applied at the handwheel exceeds a certain value (refer to
order-related technical data sheet), the shear pins will rupture and thus protect the
valve from damage. The handwheel can no longer transmit the torque (= handwheel
is spinning). Motor operation is still possible. In case of shear pin rupture due to
overload, imperatively replace the safety hub.
48
TR-M30X – TR-M1000X
Operation and control of actuator
TR-MR30X – TR-MR1000X
