Maintenance - Edwards ModuLaser Installation Manual

Chapter 4: Maintenance and troubleshooting

Maintenance

Visual check
Perform a visual check to verify pipe integrity every six months.
To perform the visual check, inspect the entire piping network and check for
abnormalities in the pipes, including any breaks, blockages, crimps, etc.
Battery status check
Perform a battery check by running the load with the batteries for about 1 hour.
While the load is still on, measure the individual battery voltages. If any battery
reads >1.5 Volts below its rated voltage, replace the battery.
Note: If any battery in a series is low, it is likely that other batteries will soon fail.
Replace all the batteries of a series set when one requires replacement.
Smoke test
Perform a smoke test when the system is commissioned and then annually. See
"Alarm detection (smoke tests)" on page 75 for more details.
Transport time verification test
Perform a transport time verification test when the system is commissioned and
then annually. The results of the annual tests should be compared to the results
recorded after commissioning the system. See "Maximum smoke transport time"
on page 75 for more details.
Detector sensitivity test
Perform a detector sensitivity test within one year of installation and then every
two years.
The detector employs a self-monitoring, automatically-adjusting calibration for the
system. The inspection only requires a periodic visual inspection for a detector
fault indication and performing the detector sensitivity test function.
If the self-monitoring feature of the system senses that the operational value of
the detector head is outside its normal range, a trouble condition will be
generated.
WARNING: If the operational value of the detector head is higher than 30%
during 7 consecutive days, this could be an indication that the detector is
contaminated by dust and requires servicing. Investigate any changes in the
environment which could explain the higher operational value. If it has been
determined that the detector is contaminated, please note that normal detector
operation cannot be guaranteed – contact your local supplier for more
information and to arrange servicing. Also take precautions to avoid or limit any
future contamination.
80 ModuLaser Modular Aspirating Smoke Detector Installation Manual