Honeywell Searchline Excel User Manual

14
MAN0530 Issue 10 - 11/09 Searchline Excel
2104M0506
3.2 SITING AND MOUNTING
3.2.1 General
When designing an installation for a Searchline Excel gas detector it is important to give
consideration to where it is to be located, what potential sources of problems may be encountered
in this location and how the unit is to be mounted and supported.
3.2.2 Location for Best Coverage
Guidance on the positioning of gas detectors to provide the best detection coverage is contained
in BS EN 60079-29-2:2007 & IEC 60079-29-2:2007 and other national Codes of Practice. It is
recommended that the installation designer consults these Codes of Practice when determining
where detectors are to be located. In general, the following positions usually provide the best
results:
• Belowpotentialleaksourcesforgasesthatareheavierthanair.
 • Abovepotentialleaksourcesforgasesthatarelighterthanair.
 • Neartoleaksources,alongtheexpectedleaktrajectory,takingaccountofthe
 prevailingwinddirectionandanyotherfactorswhichwillinuencepropagation
of the leak.
 • Betweenpossibleleaksourcesandanypotentialsourcesofignition.
Location to Maximise Reliability and Availability
Care in choosing the location of Excel detectors can contribute signicantly to the overall
reliability and availability.
When locating units, attempt to avoid areas where they may be adversely affected by the
following:
Vibration - Angular vibration of the structure to which Excel units are attached should be kept
toless than+/-0.5°. Wherepossible,avoid locationswhere highlevelsof vibrationwill be
directlyinducedintothemountingstructure.Ifcloseproximitytosignicantsourcesofvibration
is unavoidable, take steps to reduce coupling of this vibration and maximise the rigidity of the
mounting structure.
Intense Heat - Excel is certified and specified for operation in environments up to
+65°C. If sources of intense heat (flarestacks, intense sunlight, etc.) are present, a
sunshade (Part No: 2104B2323) or similar shield should be tted to the unit to protect it
from excessive heating.
Sources of Heavy Contamination - Avoid locations where high levels of contaminants will
persistently be blown onto the unit’s windows. Potential sources of heavy contamination include
generator/turbine exhausts, arestacks, drilling equipment, process vents/chimneys etc. If
sources of heavy contamination cannot be avoided, consider tting extra shielding and/or
providing good access for more routine cleaning.
Snow and Ice in Ambients Below -20°C - The heated optics on Excel units will melt snow or
iceonthewindowsinambienttemperaturesdowntoapproximately-20°C.
3. INSTALLATION AND OPERATION

Honeywell Searchline Excel Specifications

General

Brand	Honeywell
Model	Searchline Excel
Category	Other
Language	English