Drehmo D 30 - Commissioning; Checking the Rotary Direction; Setting the Torque Values

Commissioning
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7
Commissioning
The procedure for commissioning DREHMO s-range actuators is described below.
WARNING
All working steps are performed while cover is removed.
Danger of pinching and contact with live parts
à The actuator may only be opened by suitable trained and qualified staff.
All explanations below relating to commissioning apply to actuators with clockwise
closing valves.
a) Clockwise output drive rotation corresponds to direction CLOSE.
b) Counterclockwise output drive rotation corresponds to direction OPEN.
c) DR and WR switches are designated for torque and limit position in direction
CLOSE.
d) DL and WL switches are designated for torque and limit position in direction
OPEN.
e) Even if the output signal of the measuring amplifier is not to be used, the transit
screw must be unscrewed Design of the limit switching module [}22]).
7.1
Checking the rotary direction
Checks have to be performed in any intermediate valve position. In case of incorrect
direction of rotation, immediately switch off and change direction of rotation. Operate
DREHMO actuator in both directions and try to switch off through manual operation
i.e. by means of manual operation of the switching lever via limit and/or torque
switches. If the motor does not switch off, check control cables or controls. In particu-
lar in case of oversized motors (e.g. for 80 % mains voltage) for actuators or valves,
do not apply load up to the motor stall torque since this could cause damage to valve
or actuator. Make sure that limit and torque switches are always connected.
7.2
Setting the torque values
Torques are set in the factory according to the indications in the purchase order. They
will only be entered on the name plate if explicitly ordered. If no torques are indicated
in the order, the minimum adjustable torque will be set in the factory. Torques can be
adjusted within the range indicated on the name plate, using the attached dials.
NOTICE
Maximum permissible torque exceeded!
à Settings exceeding the maximum indicated torque are not permissible.
NOTICE
When using additional gearings, heed the permissible setting range for
the torque!
à For actuators supplied with additional modules attached by the manufacturer via
flanges (gearing, thrust unit), the permissible torque setting range is indicated on
the actuator name plate outside the limit switch compartment.
Use setting discs to set the torques for which a torque signal will be issued. Loosen
the top transit screw when setting the torque in direction OPEN. To set the torque in
direction CLOSE, loosen the bottom transit screw. Once the respective screw has
been loosened, turn the pertaining disc until the desired value on the scale is aligned
with the setting mark. Fasten the respective screw again.