EsiWelma s.r.l.
rev. 01 of 01-09-10 / pg.
1
E190.302
LPG and Methane gas detectors
for homes, recreational vehicles and similar sites
ESN.0.P.. ESN.0.G..
for LPG for Methane
Conformity standard EN50194
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LPG and Methane gas detectors for homes, recreational vehicles and similar sites.
Replaceable pre-calibrated sensor module prolongs the detector's life to 10 years or more.
230Vac, 12Vac/dc or 12…24Vac/dc power supply, depending on the model.
Solid state 12Vdc command output of max 13W suitable for ES.E.. Sensigas
®
solenoid valve (normally
open) or of another manufacturer but having the same characteristics.
Integrity control of electric connection between detector and solenoid valve.
Relay command output with voltage free contact suitable for 230Vac solenoid valve or other command
or alarm devices.
Possibility of parallel connection of more than one detector, also for monitoring different gases.
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Use
The ESN.0.P/.G detectors can be used to provide a visual/audible alarm and to control a gas
shut-off valve (and/or to control other alarm transmitters or actuating devices), where there are
abnormal concentrations well below the LPG or Methane gas hazard threshold.
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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
When the gas concentration exceeds the threshold set-points, the detector senses its
presence and goes into the alarm condition indicated by the red LED coming on, by the sound
of the integrated buzzer and by the activation of the relay. After about 20s, it transmits a
command to shut off the manual reset solenoid valve (transmitting a command pulse of 0.5s
every 10s), signalled by a short series of flashes of the yellow LED.
Once the alarm condition is normalised, the detector is restored to its normal operating status.
Depending on the type of system constructed, it may be necessary to manually reset the
solenoid valve to restore gas flow.
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Power supply
Detector
230Vac 12Vac/dc
12…24Vac/dc
For LPG gas (type A)
ESN.0.P.A ESN.0.P.A.D ESN.0.P.A.E
For Methane gas (type A)
ESN.0.G.A ESN.0.G.A.D ESN.0.G.A.E
For LPG gas (type B)
ESN.0.P.B ESN.0.P.B.D ESN.0.P.B.E
For Methane gas (type B)
ESN.0.G.B ESN.0.G.B.D ESN.0.G.B.E
Type A
= with direct command output for low voltage solenoid valve and auxiliary relay 10A / 250Vac
Type
B
= only visual/audible alarm (no command output)
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Available
models
and ordering
information
