Burkert MiniTOP 8633 Instructions De Service page 32

Screw the (brass) guide piece into the cover of the valve drive by hand,
without fully tightening it at the moment.
Tighten the SW 27 (brass) guide piece with a torque of 8.0 Nm.
Tighten the switch spindle onto the piston rod of the drive. A slot is provided
on the side of the spindle for this purpose (torque = 1.0 Nm).
Push the two supplied switching cams onto the switch spindle (Diameter 5
mm). Push the first cam right up to the guide piece (brass part) and the
second cam only a little beyond the upper end of the switch spindle
(approx. 5 to max. 10 mm).
Fit the MiniTOP housing. The switch spindle must be inserted from above
into the central bore of the MiniTOP housing, which can be seen through
the see-through cover.
When installing units with mechanical limit switches, ensure that the
latter will not be damaged by the switch spindle, for example, by
being inserted at an angle!
Also ensure that the two threaded SW2 pins used to secure the
MiniTOP do not protrude into the fixing opening on the lower side of
the housing. The tips of the threaded pins could damage the O-ring
on the brass guide component.
Force has to be used in fitting the MiniTOP housing, as the adjustment of
the "upper" switching cam takes place during the installation of the MiniTOP
(see "Adjusting the switch points of the limit switches").
Press the MiniTOP housing completely down to the drive and align it in the
desired position by turning. Note that it is preferable to have the pneumatic
connections of the MiniTOP and those of the valve drive vertically above
each other, as longer hoses than those provided as accessories would be
required for any other position.
Screw the hose connections onto the MiniTOP and the valve drive.
Set up the pneumatic connection between the MiniTOP and the valve drive
using the hoses provided in the accessory set.
Then secure the MiniTOP housing onto the valve drive by moderately
tightening the two threaded rods using an SW2 Allen key (max. 0.4 Nm).
(See Fig. 2).
31
Operating Instructions No. 803 925