Hochiki FIRElink-100 - Manual (Page 20)

Page 20 of 40 FIRElink-100 – Installation Manual
© 2010 Hochiki Europe (UK) Ltd
9-5-0-345/ISS4/OCT10
2 Design Limitations
FIRElink-100 is intended to provide LOCALISED incipient fire detection only. This
means that it is suitable for the substantial range of applications typified by; small
non-compartmentalised rooms, warehouse racking, or pieces of electronic or
electromechanical equipment where it is desirable to achieve individual incipient fire
reporting. In compartmentalised rooms, each compartment would normally use
individual FIRElink-100 detectors.
This product employs a very low-power aspirator and the aspirating capability of the FIRElink-100
detector is limited accordingly. FIRElink-100 is NOT intended to protect large areas, or to sample from
areas where there may be any difference in airflow rates or pressure differentials. Application of
FIRElink-100 in these circumstances is not recommended. If detection in environments conforming to
these descriptions is required, alternative versions of FIRElink products should be used.
Maximum length of sampling pipe used with the FIRElink-100 detector is 100 metres in STILL AIR with 20
sampling holes (or Capillary Remote Sampling Points). This will provide a transport time from the end of
the sampling pipe within 120 seconds. If the protected area has airflow present, the maximum permitted
sampling pipe length will be reduced. In areas or applications where the airflow rate exceeds 1 metre per
second, maximum sampling pipe length is reduced to 50 metres.
Sampling pipes must have capped ends. The end cap should be drilled with a hole normally between 4
or 5mm diameter and free from burrs. Sampling holes should normally be 3-4mm diameter or as
calculated by PipeCAD, and free from burrs. Each pipe run should not have more than 10 holes
(including the end cap hole). Pipe transit time from the furthest sampling hole from the detector must not
exceed 120 seconds and an approved type of pipe must be used for installations conforming to LPCB
requirements. It is strongly recommended that the smoke transit time from the furthest sampling hole be
checked during commissioning tests. Capillary Remote Sampling Points may be used in place of
sampling holes.
FIRElink-100 is supplied with a ‘Piped Exhaust’ type Docking Station (see illustration A). This is primarily
intended to allow the FIRElink-100 detector to sample from areas that may be at a different air pressure
to the detector location. Typical uses are for air-duct sampling and allowing the installation of the detector
in under-floor or ceiling voids or when sampling from pieces of computer related equipment.
A
Above Ceiling
Sampling
with exposed
detector.