Edwards LaserSense HSSD-2

Chapter 6: Maintenance
70 LaserSense HSSD-2 Aspirating Smoke Detector Installers Handbook
If the self-monitoring feature of the system senses that the operation of the
detector head is outside its normal range, a trouble condition will be generated.
Cleaning the detector
The exterior of the detector should be cleaned as necessary. Clean the detector
with a damp (not wet) cloth.
Caution: Do not use solvents to clean the detector. Use of solvents may cause
damage to the detector.
Replacing the dust separator (Filter) cartridge
The only part that may require field replacement during servicing is the dust
separator (filter) cartridge. Its condition can be checked using the Dust Separator
test in the Diagnostics menu of the Remote Control software or SenseNET
software, which gives a percentage reading of dust separator (filter) efficiency.
When this level drops to 80%, the detector will signal a Separator Renew fault
indicating that the dust separator cartridge needs to be replaced.
For more information, refer to either the Remote Control Software User Guide or
SenseNET Software User Guide.
It is recommended that dust separators be changed at an interval of not more
than 3 years. After replacing the filter, the detector must be put into FastLearn
mode to reset the filter condition reading.
As dust contained in the dust separators may expose maintenance personnel to
a “Nuisance Dust” hazard as defined by the Control of Substances Hazardous to
Health (COSHH), it is strongly recommended that suitable masks and protective
clothing be worn when changing filters.
Note: Used dust separator cartridges are not intended for reuse and should be
discarded.
To replace the cartridge:
1. Open the unit’s front cover and locate the dust separator (filter) handle at the
bottom right of the detector.
2. Remove the black end piece from the filter cartridge and dispose of the
cartridge.
3. Fit the new cartridge into the plastic end piece and slide the entire assembly
into the detector, using the handle. The cartridge should be fitted with the
legend “IN” towards the front of the detector.
Note: If the cartridge is inserted with the wrong orientation, the detector will
not register its presence and the Separator change message will remain on
the display.