NORMARC NM 7000 Series, Installation & Commissioning Handbook

Page: 18 / 189

1250$5&
‹1DYLD$YLDWLRQ$6
,167580(17/$1',1*6<67(0
,167$//$7,21 &200,66,21,1*+$1'%22.
3.7.2 Antenna cables
Antenna cables and monitor cables are carefully laid out in the cable trays such that equal
length of all cables is sufficient to be guided into the shelter. However, the excess cables shall
be neatly bundled and temporarily fixed to the antenna mast, and protected from damage dur-
ing later mast erection.
Connect the cable end connectors to the antenna receptacle temporarily in order to avoid dust
and water problems.
3.8 Antenna mast erection
3.8.1 Erection of the mast
A mobile crane will be needed in erecting the mast into the vertical position and placed onto
the concrete foundation. Ref. dwg. 16641A3/16642A3.
The vertical position of the mast must be checked after erection. Adjustment of the mast is
made by means of the lower nuts ref. dwg. 7084A3 on the retaining bolts. The tolerance is +/
-0,02 degrees. (Top of mast should be /- 5 mm referred to vertical centreline.)
3.8.2 Locking of nuts
Torque-load nuts as follows:
M24: 700 Nm and secure them according to Chapter 3.1.
3.9 Cable installation into shelter
3.9.1 Cable tube
A cable tube is installed from the upper part of the shelter to the antenna mast, such that the
tube ending in the mast is positioned a few centimetres lower than the other end in the shelter.
(Prevents water from entering into the shelter).
3.9.2 Cable installation
Carefully unwind the antenna cable coils and feed the cables through the cable tube. Install
the cables inside the shelter ending at the Antenna distribution unit and Monitoring combining
unit. The excess cables are pulled back through the cable tube and fixed in the antenna mast.
The power cable is installed through the cable tube to the Mains Distribution box.