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12 Operating Instructions, Comfort 850, 851 GB (#114940)
6.1 Installing the motor unit
Remove the motor unit cover.
DE
C
G
H
q
C Wall
D Gate
E
Mounting surface for the toothed rack
F Empty conduit for power supply cable / control
cable
G Floor console
H Foundations
I Front edge of the existing toothed rack
q Clear width
Calculate the distance from the mounting surface for
the toothed rack (E) to the motor unit, taking into
account dimension X.
Special 432: X = 60
Special 441: X = 60
Special 471: X = 73
6.1 / 2
Attention!
To install the motor unit correctly, the
following points must be assured:
- The motor unit console must be
aligned to face the gate, so that the
spur gear can mesh with the toothed
rack whatever the position of the gate.
- The wall plugs for the floor console
must be at least 80 mm from the
edge of the foundations.
210
188
80
X
80
11
F
F
65
56
112
6.1 / 1
6. Installation
Reference:
When determining the mounting
surface for the toothed rack, the
information given in Section 6.2.2
must be observed.
i
Attention!
To install the motor unit correctly, it
must be mounted at the mid point
between the carrier roller assemblies if
the gates are cantilevered.
27
I
Drill the holes for the wall plugs as shown in the
drilling diagram.
Reference:
The height adjustment of the motor
unit is described in Section 6.3.
i
Before installing the motor unit, check whether the
possible height adjustment of the motor unit is
sufficient for the situation on site, or if the motor
unit needs to be raised on a backplate.
Align the floor console, with the motor unit parallel
to the gate.
Advice:
When using an existing toothed rack,
the correct dimension is 27 mm from
the first screw to the front edge of the
toothed rack.
12


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