EsiWelma s.r.l.
rev. 02 of 01-09-10 / pg. 1
E218.302
Carbon Monoxide detectors
for homes, recreational vehicles and similar sites
Conformity standard UNI CEI 70032
ESN.I.O..
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Electronic carbon monoxide detectors with time-varying alarm threshold and two calibration points for
homes, recreational vehicles and similar sites.
230Vac, 12Vac/dc or 12…24Vac/dc power supply, depending on the model.
Relay command output with double insulation voltage free contact, so suitable for any kind of solenoid
valve or other command and alarm device.
Possibility of parallel connection of more than one detector, also for monitoring different gases.
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Use
The ESN.I.O.. detectors can be used to provide a visual/audible alarm and to control other
alarm transmitters or actuating devices, in the presence of carbon monoxide concentrations
that pose a hazard to humans from gas poisoning.
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Operation
The detector will enter a warm-up phase after power-up; this will take about 60" and during
this time the detector is inoperative. At the end of the warm-up phase, the detector enters
normal operation mode, and will continue in this state until it detects gas.
Gas detection
The monitoring algorithm used for gas detection is “time-varying alarm threshold” that
considers both the concentration of the gas and the time it is detected. A threshold level one,
set at 100ppm
(1)
sets off the time meter; if the concentration remains at this value the alarm
will activate after 12 minutes; at 300 ppm, the detector will enter alarm condition after the
concentration remains at this level (or at a higher level) for only 12 seconds. Concentration
values of between 100 and 300ppm require proportionately intermediate times of between 12
seconds and 12 minutes.
Once the alarm condition ceases to exist, or the level descends to below 11ppm, for a given
time that depends on how quickly the concentration descends, the detector will be restored to
normal operation.
(1)
ppm =
parts per million of concentration of gas in the air.
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Power supply
Detector
230Vac
12Vac/dc
12…24Vac/dc
Recessed
ESN.I.O.x
ESN.I.O.x.D
ESN.I.O.x.E
Wall-mounted
ESN.I.O.x + ESN.KW
ESN.I.O.x.D + ESN.KW
ESN.I.O.x.E + ESN.KW
Table-top
ESN.I.O.x + ESN.KT
ESN.I.O.x.D + ESN.KT
ESN.I.O.x.E + ESN.KT
Table-top (precabled)
ESN.I.O.x + ESN.KC
ESN.I.O.x.D + ESN.KC
ESN.I.O.x.E + ESN.KC
The letter A or B inserted in field x of the product order number indicates the type of detector, i.e.:
A = with relay command output
B = without relay command output (visual/audible alarm)
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Available
models
and ordering
information
