Installation and Operation Manual

Page 31 WES
3
Installation and Operations Manual V1.4 Ramtech Electronics Limited 2018
The maintenance procedures described below should be conducted
with the following frequency:
One month after installation: Routine inspection
Inspection every 3 months thereafter
Every 6 months: Operational Test
Every 12 months: Cleaning
All above frequencies of maintenance are dependent upon ambient
conditions. Best judgment should be used to ensure proper
maintenance.
Routine Inspection
i) Ensure the sensor head is secure and undamaged
ii) Check the heat entry apertures are in no way obstructed.
iii) Ensure the surface of the sensor’s outer cover is clean. If
there are deposits due to the presence of oil vapour, dust
etc, the sensor should be cleaned in accordance with the
cleaning instructions detailed later. It may be advisable
to ensure that such cleaning is conducted regularly in the
future.
iv) Ensure no equipment which may generate excessive
heat has been installed in the vicinity of the sensor
since the last routine inspection. If such equipment has
been installed, you should notify the Safety Ofcer or other
competent authority that its presence may cause false
alarms.
Operational Test
The purpose of the Operational Test is to conrm the sensor’s correct
operation in response to a heat condition.
i) Testing the sensors will trigger the site wide alarm. To
avoid unnecessary evacuation site personnel should be
informed when testing starts and when testing is complete.
ii) Test the sensor with heat from a warm air gun designed
for heat sensor testing (e.g. ‘No Climb - Solo’ heat sensor
tester).
Check that the sensor gives an alarm condition within 10-
20 seconds depending upon the sensor grade and the
applied air temperature.
Note: Hot air blowers sold for paint stripping, soldering
pipes etc, generate sufcient heat to damage the sensor
and should not be used for testing heat sensors.
iii) After the sensor has given the alarm condition, silence
the system from an Emergency Call Point or Emergency
Control Unit. It may be necessary to allow a short time to
elapse before resetting the sensor, to allow any residual
heat from the test to disperse.
iv) Before proceeding to the next sensor, ensure that the
sensor just tested does not re-operate due to the
presence of residual heat.
Functional Test
The Functional Test checks the sensor’s operation. These sensors may
be returned to WES Customer Support for Functional Testing.
Cleaning
Note: The sensor head should NOT be disassembled.
i) Carefully remove the sensor head from its base.
ii) Use a soft, lint-free cloth, moistened with alcohol for sticky
deposits, to clean the plastic casing.
iii) Using a soft bristle brush (e.g. an artist’s paint-brush)
carefully brush between the vanes and thermistor in a linear
motion away from the apertures on the plastic case.
iv) Ensure that no debris is left on or around the thermistor
once cleaning is complete.
v) If the unit needs further cleaning, or is damaged or
corroded, please return the complete sensor to
WES Customer Support for service.
Heat Sensor Maintenance