16 Manual for installation and operation, Comfort 870 GB (#81125)
6.2 Mounting the toothed rack
Attention!
To install the rack correctly, the
following must be ensured:
- The motor unit has been mounted.
- The motor unit is unlocked (released).
6.2.1 General
Attention!
To ensure trouble-free movement of
the gate, the following points must be
assured:
- The screws (A) should not obstruct
the operation of the gate (e.g. by
extending into the path of the gate
rollers (B)).
- The spur gear (C) should not rest
against the gate.
- The spur gear (C) should not be at its
lowest possible position (it must be
possible to lower the spur gear by
1 to 2 mm after the toothed rack
assembly has been installed).
• Determine the installation height of the toothed rack
on the gate.
• Adjust the height of the spur gear accordingly.
Advice:
The toothed rack can be adapted to fit
the gate by means of a backplate (D).
Reference:
- For gates with an existing toothed
rack, please skip to Section 6.3.
- Section 6.6 describes how to release
the motor unit.
The toothed racks are available in two standard
lengths: 2,000 mm und 4,000 mm.
The toothed racks can be cut to length or slotted
together according to requirements.
Special 432, Special 441
The toothed rack comprises a rack housing, toothed
rack segments and two clamping assemblies.
Special 471
The toothed rack is made up of several toothed rack
segments.
Minimum length of toothed rack
The minimum length of the toothed rack is equal to
the movement stroke of the gate between the gate
OPEN and gate CLOSED positions + 180 mm.
Maximum length of toothed rack
The maximum length of the toothed rack is equal to
the width of the gate.
6. Installation
6.2.2 / 1
B
A
C
D
90 – 110
