14
Sensitivity Adjustment
On identifying a necessary adjustment,
use a narrow electrical flat-headed
screwdriver. Take care not to
over-adjust as this will render the unit
inoperative.
Sensitivity Adjustment if Deafgard
is not sensitive enough, i.e. does
not respond to the fire alarm:
1. Carefully insert screwdriver into hole
on back of the unit.
2. Turn clockwise through no more than
5 degrees (a small adjustment is
equivalent to a large alteration in
sensitivity).
3. Test Deafgard to the fire alarm.
4. If problems persist, repeat steps 1-3.
Note: The Adjustment Screw is
limited in both directions, once you
can feel resistance against turning
- stop to avoid damaging the unit.
If Deafgard is too sensitive (responds to
no apparent sound) follow steps 1-4,
but turn anti-clockwise in Step 2.
Note: Deafgard is factory
set to be triggered into a
fire alarm condition at
75dB(A), as recommended
by BS 5839-1:2002.
Deafgard can be adjusted
to respond to alarms as
quiet as 70 dB.
Only adjust sensitivity as
a last resort.
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