Page 20 of 97
Title FireVu Detector Standalone Installation Manual
NetVu Ltd.
No 1 Thellow Heath Park, Northwich Road, Northwich, Cheshire. CW9 6JB
a length sufficient to cover the room being lit.
Other lighting
If using flame detection, the presence of flashing beacons and other fluctuating sources of bright
light, will require a higher threshold setting to avoid false alarms. Consequently, there will be an
increase in the minimum flame size that will be detected.
Background of Image when using detectors externally
The detector should be po
sitioned to give as sterile a view as possible behind the “risk area”,
particularly when looking for smoke rather than flame. Continual movement in the background will
require setting a greatly reduced sensitivity of the smoke detection parameters, in order to avoid
false alarms.
Examples of phenomena to avoid are:
●
Large areas of sky (distant clouds can be easily mistaken as smoke by the system and so
areas of sky should not be monitored).
●
Machinery and natural phenomena which may emit visible steam.
●
Plant that emits smoke.
●
Visible air-borne particles.
Second Fix
– Cabling and Connection of Standalone FireVu Detectors
By definition, a standalone FireVu detector is one where less than four detectors are used on an
individual site and where FireVu Annunciators and FireVu Network Extenders are not used. This
section of this manual describes the cabling and connections in this circumstance. For FireVu
systems large than four detectors different methods apply and these are described in the FireVu
Systems Installation Manual FV/MAN/002
Cabling Requirements
Detectors should be cabled in the normal way using fireproof CAT5 suitable for the lengths of run
involved.
It is recommended that any other connection between the FireVu and the items to which it is
networked, (or if appropriate, the FACP) should also be run in appropriate fireproof cabling.
Typical block diagrams for FireVu detectors being used in standalone applications are shown on
the next two pages.