10.4 Replacing the scissors arm
10.4.1 Replacing the scissors arm with wall timer (standard
configuration)
WARNING:
Before to remove the tubehead, close and tie the two sections of the
scissors arm together.
Failure to follow these instruction may harm both the technician and
damage the arm itself.
NOTE:
Before carrying out the following operations, disconnect the equipment
from the line.
1.
Remove the tubehead as described in paragraph 10.1.1, steps from 1
to 3.
2.
Remove the plastic timer cover loosening the two sealing screws
placed on the top part. Pull the cover to release the locking pins.
To make the operation easier, disconnect all wires between wall plate
and cover.
3.
Remove the front covers of the extension arm.
4.
Disconnect cables from connectors X2 and X4 (including shield W2)
(Figure 6-19). Remove the cables from the extension arm completely.
5.
Remove the friction group on the extension arm as described in
paragraph 6.3.2, steps 1 and 2; remove the arm.
6.
Assemble the new arm as described in paragraph 6.3.2, steps 3 and
following.
7.
Connect the cables ad described in paragraph 6.5.1.
8.
Reassemble the tubehead as described in paragraph 10.1.1, steps
from 4 to 6.
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