Page 16 of 29 Revision 3.3 Feb 2021
ProReact EN Analogue Installation Manual
Document Ref. PACC-MAN
Area Protection
The ProReact EN Analogue LHD system is suitable for area protection
applications where the sensor cable is typically installed on the ceiling,
for example in a warehouse. The sensor cable should be installed with
a minimum distance between the cable and ceiling of 20mm. This is
especially important when the sensor cable is mounted to a uninsulated
ceiling where a warm boundary layer can develop and delay the
operation of the detector.
For DIN VDE 0833-2 compliant installations the maximum horizontal
distance from the sensor cable to any point on the ceiling is given as C in
Table 4.
Therefore the distance between two parallel runs of sensor cable (shown
as A in Figure 8 below) must not be greater than the distance shown in
Table 4. For Class A1I, the maximum ceiling height (h) is 9m (see DIN VDE
0833-2 section 6.1.5.3).
For BS 5839-1 compliant installations or UL 521 and NFPA 72 compliant
installations, the maximum horizontal distance between any point in a
protected area and the linear heat detection cable nearest to that point is
given as C in Table 5. This spacing is also in accordance with the spacing
detailed in the UL listing (see page 3) for UL 521 and NFPA 72 installations.
Note: for pitched ceilings a greater spacing may be allowed. Refer to BS
5839-1 Section 22.6 for more information.
Note: for UL 521 and NFPA 72 compliant installations, refer to section 17.6
of NFPA 72 for guidance when installing linear heat detection on pitched
ceilings or where obstructions may be present.
The recommended spacing between clips is 0.5m.
Ensure the spacing between adjacent runs of sensor
cable is in accordance with the recommended guidelines,
such as Section 6.2.7.12 of DIN VDE 0833-2, Section 22.6
of BS 5839-1 or Section 17.6 of NFPA 72 (or other country
equivalent code).
In any case, the sensor cable should not be mounted
closer than 0.5m to any walls, equipment or stored goods
(shown as B in Figure 8).
Ensure the minimum distance between the sensor cable
and ceiling is 20mm
Ensure the length of sensor cable used is between
the minimum and maximum zone length
(see page 12 for details)
Table 4. DIN VDE 0833-2 Max distance to sensor cable
Table 5. BS5839-1 or UL 521/NFPA 72 Maximum distance to sensor cable
Figure 8: Area protection with the ProReact EN Analogue LHD System
Roof Pitch
Room Size Flat & up to 20° Over 20° pitch
up to 30m² C = 4.4m (A = 8.8m) C = 4.4m (A = 8.8m)
over 30m² C = 3.5m (A = 7m) C = 5.0m (A = 10m)
Ceiling type Distance
Flat ceiling C = 5.3m (A = 10.6m)
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