COMMISSIONING
49
Adjust the angle of the detector for the required field of view and then tighten the fixing nuts and
bolts. Then complete the routing of the cable to the detector using cable ties or clips as necessary.
The safety chain secures the top case to the bracket. The end with the ‘L’ shaped link, is screwed
to the underside of the top case, see figure 31 above. The washers must be fitted between the screw
head and the chain when fitting this link. The other end should be fixed to one of the bolts at the
bottom of the bracket. The screw link must be securely closed when the detector is being fitted or
removed. Otherwise if the detector is dropped the safety chain may not stop the top case falling.
7.5.2
POWER UP
Apply power to the detector. The alarm (RED) and fault (yellow) LED should both come on briefly.
The alarm LED will turn off and the fault light will remain on for a few seconds whilst the detector
performs internal self-tests. The fault LED will then change to flashing whilst the sensors are
settling. The alarm and fault signalling outputs will now report the normal state. If a fault is
detected, then the LED remains on (not flashing) and a fault will be signalled on all of the outputs.
The fault LED will continue flashing until the array and other sensors have settled. The detector
will take between 5 and 10 minutes to settle; depending on the temperature of the detector. When
the sensors have settled then the fault LED will turn off and the detector is now ready for functional
tests. If the detector fails to settle then a fault will be indicated, the fault LED will turn on and a
fault will be signalled on all the outputs.
TYCO TW16 5DB UK
TO
RQ
UE
CO
VER
BOLTS (M
IN. GRADE A
4-70
) TO
7L
B.F
T
CA
BLE
ENTRIE
S: M20 CABLE RA
TING
: T
a
+ 2
5
Fig. 31
Safety Chain Connection
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