2
G 227 - RGS 328 Eng.
25.11.08 MZ
REV. 01
We reserve the right to make changes without notice
COSTER
7. SITING
Carbon monoxide (CO) is produced by the combustion of carbonaceous materials: solids (e.g. carbon, coke); liquids
(e.g. crude oil) or gaseous (e.g. methane, propane-LPG). Various types of gas appliances are normally installed
in domestic premises:e.g. fireplaces, stoves, gas hobs, ovens, water heaters, etc. Lack of or poor maintenance of
the appliances and, above all, of the means of removing the exhaust gases, can create the formation or the return
of carbon monoxide in the spaces themselves, thereby creating an extremely dangerous situation for the persons
present in them.
Large quantities of carbon monoxide are also present in the exhaust gases of automobiles, so that it is important to
check the presence of this gas in public or private garages.
The correct positioning of the gas detector is vital for ensuring its correct operation and, consequently, for
ensuring the safety of the persons present. For this reason you are advised to have the installation carried
out by qualifi ed persons.
Carbon monoxide is a gas with a density very similar to that of air so that it tends to diffuse uniformly.
The detector must be positioned:
– at a height of 150…200 centimetres from the floor (at eye level).
– as far as possible from kitchen gas appliances (also in order to avoid contamination of the sensor by
grease and kitchen vapours)
– at a horizontal distance not less than 2…3 metres from gas boilers or calorifiers.
The detector must not be positioned:
– in the open;
– in closed spaces (e.g. behind a curtain, in a corner or in a wardrobe);
– directly above or below a basin or sink;
– near doors or windows;
– near air extractors;
– in places where the temperature and humidity could be at variance with those indicated under
3. TECHNICAL DATA;
– in places where dust or dirt could block and so render ineffective the sensor;
– in places where air movement could be hindered by furniture;
– in places where it might be sprayed by water;
– in places where it would be especially difficult to reach for checking.
6. CONSTRUCTION
The detector comprises :
– Shockproof plastic base (4.
1
, 5.
1
) with two screw-holes at standard spacing (5.
3
), which permit installation on a
wall or on a standard pattress, and the knockout (5.
4
) for the passage of the electric cables.
– electronic circuit (5.
2
), constructed according to CEI standards, where are housed the terminal block for the
electrical connections (5.
9
and 5.
10
); the gas-detecting sensor (5.
11
); the acoustic alarm (5.
12
); the hermetically-
sealed output relay with its contacts enclosed in inert gas to avoid the sparks from switching coming into contact
with the surrounding atmosphere (5.
8
); the push button for switching off the internal acoustic alarm and the TEST
for the device (4.
6
, 5.
15
); the microprocessor (5.
14
); the LEDs (5.
13
).
– protective cover (4.
2
), in shockproof plastic, which is secured by means of two hinge elements (5.
5
) situated on
the left; and by a cover securing clip (5.
6
) on the right.
4. OVERALL DIMENSIONS
5. BASE
1 – Base
2 – Cover
3 – Sensor fault LED
4 – Alarm & pre-alarm LED
5 – Power supply LED
6 – Button for TEST and for
switching off the internal
acoustic alarm
1 – Base
2 – Printed circuit
3 – Holes for fixing screws
4 – Entry for cables
5 – Cover hinge elements
6 – Cover securing clip
7 – Transformer
8 – Output relay
9 – Power supply terminal block
10 – Terminal block operations
(relay switch)
11 – Gas detecting sensing
element
12 – Acoustic alarm
13 – LEDs
14 – Microprocessor
15 – Button for TEST and
switching off internal
acoustic alarm
