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Dosaodor-D
INSTALLATION
General Rules
WARNING
!
National safety standards and established
rules shall be followed in odorizing system
installation and operation, concerning,
in particular, electrical works, fire and
thunderbolt protection, safety procedures
on odorant handling. All means for venting
must be provided in the assemblies where
pressure equipment is installed. Before
installation, check if service conditions are
consistent with use limitations.
Where this product is used:
•
Provide cathodic protection and
electrical isolation to avoid any
corrosion
•
Natural gas must be filtered by proper
filters/separators/scrubbers to avoid any
of erosion or abrasion of the pressure
containing parts
The Dosaodor‑D must be installed in non‑
seismic area and not undergo the action of
fire or thunderbolt.
Positioning Components
Electronic control unit
To be installed in an electrically "Safe" area. Therefore, in
natural gas decompression plants, the facilities suited to
these purposes are the following:
•
Electric power facility, a defined area designed and built
to house all electrical devices linked to and controlled
by the station.
i.e. Flow computers, remote monitoring units,
telephones, etc.
•
Heating plant, that is, a defined area designed and
built to house the boilers needed for the heating of
gas. This area must be built and installed according
to the specifications for an electrically "Safe area"
classification.
•
Rooms and storage units located outside the areas
defined as "Hazardous areas" according to the actual
regulation.
The control unit is enclosed in a solid metal box. However,
it is strongly recommended that the installation position
provides for protection from rain and direct sunlight using a
suitable cover. Use the four brackets supplied with the unit
for installing it on the wall. Due to the heavy weight of the
unit 12 mm screw anchors are recommended for use with
the brackets.
10
Position the control unit at a height of about 100 - 120 cm
(40 - 48 in) from the floor level and ensure that the unit
display is at eye level. If possible, leave a gap of at least
50 cm (20 in) on the right side of the unit from walls or any
protruding objects, as this space will be required when
opening the glass door to access the parts inside.
It is best to install the unit is in the immediate vicinity of
the flow computer, to facilitate the connection of the cable
receiving signals from the Dosaodor-D during operation.
Ground connections of the electronic control unit and
shielded cables to must be connected an equipotential node
(obligatory only for the countries members of the EEC).
Pneumatic panel
To be installed in the immediate vicinity of the odorant
pick-up point (absorption-type tank or other type of tank).
All of the panel components are resistant to chemical attack
from the odorizing liquids, the elements and any conditions
specified in the regulations regarding safety and electrical
equipment.
The injector must be positioned on a pipeline
in the downstream section of the station.
It is essential that the distance between the panel and the
injector be as minimum as possible, as a short route limits
the quantity of odorant subject to pressure thus reducing the
chances of micro-leaks of liquid occurring.
The panel can only be installed on a wall.
It is very important to check that the lowest
point of the tank from which the odorant is
picked up (bottom) is located at a height of
at least 40 cm (16 in) from floor level, and
that the panel is positioned with the lower
anchoring brackets resting on the floor.
This is VITAL but NOT SUFFICIENT to ensure
the correct operation of the system. In the
case of a gas reduction station complete with
a volumetric meter, it should be taken into
consideration that the max. pressure differ‑
ence permitted between the odorant tank and
the re‑admission/detection point of the pres‑
sure coming out of the station (upstream the
meter) should not exceed 15 mbar (0.22 psi)
under max. performance conditions.
In case the above‑mentioned condition is not
met, the system shall have to be installed
according to indications referring to systems
complete with venturimetric meter.
CAUTION
CAUTION
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