EsiWelma Sensigas EW40, Инструкция по установке и эксплуатации

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Type / N.
Rev. Data Page Total pages
EW095.605 5 November 2010
14 96
EsiWelma
s.r.l.
Use the information below to correctly position the detectors:
•
20-30 cm from the floor to detect gases heavier than air (LPG or Gasoline Vapours)
•
20-30 cm from the ceiling to detect gases lighter than air (Methane)
•
midway between floor and ceiling (1.2 - 1.8m) to detect gases as heavy as air (Carbon
monoxide - CO)
The detectors must be wall-mounted only, using anchors and screws. The direction of the
detector must always have the sensor facing downwards.
Fig. 3.8 – Wall-mounting of the sensors
The cable entries on the ATEX certified detectors must be through a cable gland with the
same protection specifications. The installation grade will be declassified if other types of
cable glands are used.
To guarantee correct operation of the system, in addition to the instructions above, the
positions of the detectors must take into consideration the following specific installation
guidelines:
The detector must be mounted:
•
where accidental gas leakages are possible
•
at least 1.5 metres from heat sources
•
not in spaces where ventilation is poor and where gas pockets may form
•
at least 1.5 metres from vent holes
•
away from hindrances to natural gas flow
•
in environments with a temperature range of -20°C t o 50°C and relative humidity below
90% (non-condensing).
Wall-mounting
slots
Cable connection
with cable gland
Cable connection
with cable gland
Wall-mounting
slots