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9.
Signalling of detectors
STATE OF DETECTOR
OFF (no supply)
Pre-heating (60s)
Normal operation
Gas alarm
Sensing element fault
= OFF
Legend:
= ON
10. Maintenance
The device does not require any maintenance except for periodically operating check (see above). Replace the detector after 5
years from the date of installation (see indications on front cover).
For the periodical cleaning of the detector plastic box, use a lightly dampened rag and neutral soap. Do not use aggressive
cleansing products such as alcohol, ammonia, solvents etc.
CAUTION: To avoid any risk of electric shock, before cleaning the detector be sure that it is powered off by acting
on the main switch of the electric plant.
®
EsiWelma
s.r.l.
LEDs
Green
Yellow
= not active
= active
BUZZER
Red
(ESN16.., ESN26..)
= no voltage (valve open)
= pulses (valve closed)
- 24 -
OUTPUTS OF DETECTOR
Solenoid valve
(ESN14.., ESN26..)
C NC NO
C NC NO
Relay
C NC NO
C NC NO
C NC NO
C NC NO
C NC NO
= relay OFF
= relay ON
E192.604
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