Technical Manual: EVC-H - 000014 (Changes are subject to DCRN)
4
Section 3 - DETECTOR MODELS
The
EVC-H
range of heat detectors are currently available
in two versions. Others can be made available upon demand.
i) EVC-H-A2S
ii) EVC-H-CS
These versions have three terminals for connection onto
the two wire zone circuit. The remaining terminal (5)
provides a switched current sink function which operates
when the detector goes into alarm condition, suitable for
the operation of auxiliary function such as a remote indicator.
Section 4 - BASE MODELS
A variety of bases are available for use with the
EVC-H
detectors. It is important to use the correct base
for each application. The available Base models are:
i) STB-4 / UB-4 base: for standard use with EVC-H series
heat detector.
ii) UB-4SD base: This is similar to the standard
UB-4 base, but also includes a schottky diode for head
removal fault monitoring. The schottky diode is used in
some fire systems to ensure power is maintained, in
the event of an unauthorised detector head removal,
to other detectors further on the zone.
iii) STB-4SE base: Similar to UB-4 base, except deeper.
• Ref No: NISM/EVC-H/05 • Date: 23.01.19 • Issue: 5
• evolution • EV C-H • heat detector instruction manual
