Page 19 of 29 Revision 3.3 Feb 2021
ProReact EN Analogue Installation Manual
Document Ref. PACC-MAN
Useful information
Leader Cable
Leader (non-sensing) cable may be used between the ProReact EN
Analogue Composite Control Unit and the ProReact EN Analogue Sensor
Cable. Only leader cable approved for use with the ProReact EN Analogue
LHD system should be used between the ProReact EN Analogue
Composite Control Unit and ProReact EN Analogue Sensor Cable.
The ProReact EN Analogue junction box must be used to connect the
leader cable to the detection cable.
Low Temperature Considerations
ProReact EN Analogue Linear Heat Detection cable is suitable for use in
ambients down to -40°C (-40°F). Such conditions occur in cold storage
freezer warehouses and outdoors for example.
When installing LHD cable in low ambients or for use in low temperature
conditions careful consideration of the conditions and environment
should be undertaken.
If possible, do not install the LHD cable when the ambient temperature
is below -10°C (-14°F). The materials within the cable will become less
exible and are more prone to damage during installation. If the ambient
temperature is likely to drop signicantly after installing the cable take
into account linear shrinkage of the cable when attaching support
brackets. The cable can shrink in length by 1-2% at -40°C (-40°F).
A silicone sleeve insulator must be placed around the cable before
clipping into the support bracket. This prevents damage to the cable and
reduces the heat sink eect of the clip.
The minimum bend radius of the detection cable should be increased
to twice (2x) the specied value shown on page 12 to account for the
reduced exibility. The maximum distance between support brackets
should be no more than 0.5m (1.5ft) and it is important to support the
cable close to either side of any bend.
Ensure any junction boxes or other enclosures are waterproof and
suitable for the expected operating temperatures.
Refer to the Technical Specications for the minimum operating
temperature of each component in the ProReact EN Analogue
LHD System.
Joining Sensor Cable
It may be necessary to connect two or more lengths of analogue linear
heat detection cable together during installation or the lifecycle of
the system. For example, if the ProReact EN Analogue LHD cable gets
damaged or has exceeded the maximum restorable temperature of 125
°C (257 °F), the section can be removed and a new section spliced in its
place. Likewise, during installation two lengths of analogue linear heat
detection cable may be connected together to extend the zone or to aid
in physical installation of the cable. Only connect analogue linear heat
detection cables with the same three letter code together.
The ProReact EN Analogue Junction Box should be used to connect
two ends of analogue sensor cable together. The ProReact EN Analogue
Junction Box includes two cable glands and 5 connection terminals
mounted on a DIN rail. The 4 cores and shield wire should be connected
to the corresponding cores and shield wire on the adjoining cable using
the connection terminals.
When replacing a section of the detection cable
for any reason, the section including at least 3m
(10ft) either side of the damaged area should
be replaced.
Ensure any replacement cable used to splice in a
new length is the same three letter code as the
existing cable. Do not mix and match sensor cable
with dierent three letter codes on the same
control unit.
Ensure the total length of sensor cable after
joining is between the minimum and maximum
zone length (see page 12 for details).
The maximum length of leader cable between the
control unit and the sensor cable is 250m
Note: the use of leader cable between the control unit and sensor cable
is not VdS approved.
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