Videotec EXHC series, Instruction Manual

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nstruc
tions manual
10
6.2.2 Changing the back cover gasket
If the back cover gasket of the housing is worn it
should be replaced using the supplied spare or,
failing that, using only and exclusively a VIDEOTEC
original part.
When changing the gasket, take care to make sure it
is properly inserted in its seating.
Reconnect the earth wires that had been
disconnected in order to extract the flange.
Close the flange properly, using a torque wrench
setting of 12.5Nm when tightening the 12 screws.
6.3 Operational test
h
Before proceeding with the following
operations, make sure that the mains
voltage is correct.
To connect the housing to the main power supply
use cables designed for use in potentially explosive
atmospheres, and proceed as follows:
• Choose and install cable glands that are suitable
for the housing marking and the type of
atmosphere present (EN/IEC60079-14);
• Fasten the cable gland using a torque setting
which guarantees that at least five threads are
engaged;
• Use cables that are suitable for the selected cable
glands;
• Make the connections with the camera and lens;
• Power the unit;
• Carry out the operational tests.
6.2 Installation
h
The installer must not use devices that
generate dangerous radiation.
The back flange of the housing has 12 stainless
steel A2-type M6 screws. It also has 3 screws at 120°
intervals to facilitate extraction of the flange. When
the M6-thread screws have been unscrewed from
the flange, turning the 3 screws at 120° (one turn per
screw at a time, in turn) will make it easier to extract
the flange.
6.2.1 Installing the camera
To install the camera, you have to extract the flange
closing the housing, which also supports the plate to
which the camera will be attached, and the related
terminal board. This plate is supported on two guides
attached to the housing; when the flange is removed,
the plate slides along the guides, so that it is easy to
fit and connect the camera and its accessories. During
installation, we strongly recommend insulating the
camera from the support plate using the supplied
insulating spacers.
(To identify the parts, see the illustration below and
the attached electrical diagram).
Before closing the flange, after installing the
camera, make sure that the 4 earth wires have been
connected (back cover, front cover, housing body,
terminal board) and make sure they have been
placed at the same potential.
We recommend a torque wrench setting of 12.5Nm
for the 12 screws closing the flange.
The appropriate joint is used to install the housing.
It has 4xM6 holes at 90° intervals, and, where
appropriate, a bracket which is attached using the
4xM8 holes.
Flange
Earth
connection
Fixing plate
Back cover
gasket
Terminal board
Fig. 03