EW146691_en - rev. A
Gas Detectors
–
UR.21.P
02/04/2020
Gas detection systems for car parks and tunnels
4/8
Sensor Lifetime
Sensor average lifetime (see technical characteristics) is referred to a typical usage in a
pollution-free environment. Presence of a high concentration of pollutants can shorten the
lifetime of the sensing element.
The Catalytic Sensor only works in the presence of Oxygen. Do not use pure gas or the
lighter directly on the Sensor which could be irreparably damaged.
CAUTION: consider that in particularly polluted environments or with vapors of flammable
substances (in particular solvents), the useful life of the sensor can be considerably reduced.
Some Substances cause a permanent reduction in sensitivity, preventing the Sensor from
coming into contact with Silicone Vapours (present in Paints and Sealants), Lead Tetraethyl
or Esters Phosphates. Other substances cause a temporary loss of Sensitivity, these
"Inhibitors" are Halogens, Hydrogen Sulfate, Chlorine, Chlorinated Hydrocarbons. In the latter
case, after a short time in Clean Air, the Sensor resumes its normal operation.
Once the detection system starts up, it has to be supplied with energy during all the lifetime of
its sensors.
Seasonal use is not recommended.
Mechanical Installation
For Sensors installation, follow the rules as in the diagram:
The positioning of the sensors must take into account not only the aforementioned
general rules, but also the following installation rules; in particular the sensors must be
installed:
−
Near possible gas leak points;
−
At least 1.5m from heat sources and ventilation openings;
−
Never in poorly ventilated areas where gas pockets may occur and, more generally,
away from obstacles to the natural movement of the gas;
−
Far from appliances that throughout their normal working can have functional gas
leakage (unless this is the purpose of the detection);
−
In environments where atmospheric conditions are not included in the technical
characteristics.
−
The assembly and disassembly of the sensors must be carried out when the appliance
is not live.
The number of sensors to be installed in an environment is proportional to its surface, its
height and conformation, as well as the relative density of the gas.
The installation must also take into account:
−
The geometry of the structures (beams, false ceilings, wells, etc.)
−
Mechanical and liquid protection
−
Poisoning protection
−
Accessibility for appliance maintenance.
The installation of the detectors must take place as late as possible to avoid damage, but
in time to adequately protect the environment for which they are intended.
Environmental
compatibility
and disposal
This product has been designed and constructed using materials and processes that take into account the
environmental issue. Refer to the following notes for disposal of the product at the end of its working life,
or when it is replaced:
-
for disposal purposes, this product is classified as an electric and electronic device: do not dispose of it
with normal household waste, in particular as regards the printed circuit
-
comply with all local laws in force
-
as far as possible reuse basic materials to keep environmental impact to a minimum
-
use local depots and waste recycling companies, or contact the supplier or manufacturer to return used
products or to ask for information on environmental compatibility and waste disposal
-
the product packaging can be reused. Keep it for future use or to return the product to the supplier.
Heavy Gas (e.g. GPL,
Gasoline Vapours)
20÷40 cm from floor
OK
1,5÷2 m from floor
Gas with Density similar to Air
(e.g. Carbon Monoxide CO)
20÷40 cm from ceiling
Light Gas (e.g. Methane)