20
5. FittheSunshade/Delugeprotection.
TheSunshade/DelugeprotectionshouldbeclampedaroundthebaseoftheStandardWeatherProtection
with the longer overhang extending beyond the Standard Weather Protection. Ensure the clamp does not
cover the gas venting slot of the Standard Weather Protection.
6. Fitapprovedcableglandstothejunctionboxcableentriesasrequiredtomaintainthecerticationand
IP rating.
7. Fit approved blanking plugs to the unused junction box cable entries as required to maintain the
certicationandIPrating.
8. Fittheexternaleldwiringthroughthecableglandsandsecure.
9. TerminatethegasdetectorandeldwiringinaccordancewithChapter4(ElectricalInstallation).
10. Replace the junction box lid.
3.2.2 Installation with a ow housing (sampling system)
6mm o/d
Outlet
Inlet
Sampling systems should be designed to comply with the Searchpoint Optima Plus operating conditions,
for example, sample temperature, cleanliness, water content, dust content etc.
Inaddition,considerthefollowingpoints:-
1. Flow rate should be between 0.7 litres per minute and 2 litres per minute.
2. Aowfailureindicatorshouldbeincludedinthesystem.
3. If possible, use negative pressure to avoid the risk of pressurisation affecting the gas reading.
4. The choice of sampling lines should be appropriate to the application.
3. Mechanical Installation