DATE:
PAGE:
Ref No:
ISSUE:
6
evolution
EVC-P PHOTOELECTRIC SMOKE DETECTOR
INSTRUCTION MANUAL of3
NISM/EVC-P/01
01
Section 3 - DETECTOR MODELS
The EVC-P photoelectric smoke detector is supplied, as
standard,withfourterminals.
The EVC-P has the facility to activate a remote LED
indicatoror auxiliaryfunction,asstandard.
The terminals on the EVC-P detector head are
configuredasfollows:-
Terminal 3 = zone positive in/out
Terminal 1 = zone negative in
Terminal 6 = zone negative out
Terminal 5 = 20 mA @ 24V d.c. switched output
Section 4 - BASE MODELS
A variety of bases are available for use with the
EVC-P detector. It is important to use the correct base
for each application. The standard range available is as
follows:-
i) STB-4base:having4terminals,forstandard use
withEVC-Pdetectorincludingtheauxiliaryoutput
function.
ii) STB-4SD base: This is identical to the standard
STB-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
eventofanunauthoriseddetectorheadremoval,toother
detectors further on the zone.
iii) STB-4SE base: Similar to STB-4 base, except
deeper.
iv) STB-4SE-24VRbase: Relaycontactbase.
Section 5 - INSTALLATION
In normal use, the EVC-P detector will be installed at
ceiling level. Pass the field wiring through the cable hole
in the centre and from the rear of the base. Offer up
and affix the base to the ceiling or conduit fitting with
screws via the base mounting holes. Connect the field
wiring to the base terminals, as detailed on page 6
making sure the wiring does not obstruct fitting of the
detector head. Fit the detector head by inserting it into
the base and turning clockwise until the notch in the
detector rim aligns with base locking screw. The
OMNIVIEWTM 360oindicator permits visibility from any
angle.
Fit the plastic dust cover supplied over the detector to
keep out dust etc, until the system is commissioned. If
the dust cover is not fitted and the environment is
slightly dusty, such as when building work is being
completed, for example, problems of false alarms are
likely to occur after commissioning unless cleaning of
the detector is undertaken. At commissioning, the dust
covershouldberemovedanddiscarded.
NOTE: THE PLASTIC DUST COVER MUST BE RE-
MOVED FROM THE DETECTOR IN ORDER FOR THE
DETECTORTOFUNCTIONCORRECTLY.
Section 6 - MAINTENANCE AND
CLEANING
Maintenance:
The EVC-P detector is a high quality product engineered
for reliability. In order to obtain optimum performance,
periodic maintenance is required. If proper preventative
maintenance is not carried out, there is a likelihood of
malfunction, as a dirty detector is more likely to cause a
false alarm.
Servicing:
Servicing of the system should be carried out in accord-
ance with the requirements of BS 5839 Part 1, Fire
Detection and Alarm Systems for Buildings: Code of
Practice for System Design, Installation and Servicing.
The maintenance procedures described below should be
conductedwiththefollowingfrequency:
Onemonth after installation: RoutineInspection
and every 3 months
thereafter.
Every6 months: OperationalTest
Every12months: Functional Test and
Cleaning.
Allabovefrequenciesofmaintenance aredependenton
ambient conditions.
Routine Inspection:
i) Ensure the detector head is secure and undamaged.
ii) Check the smoke entry apertures are in no way
obstructed.
iii) Ensure the surface of the detector’s outer cover is
clean. If there are deposits due to the presence of oil
vapour, dust etc, then the detector should be cleaned in
accordance with the cleaning instructions detailed later
in this manual. It may be advisable to ensure that such
cleaning is conducted regularly in the future.
iv) Ensure no equipment which may generate combus-
tion products or fine airborne particles, has been
installed in the vicinity of the detector since the last
routine inspection. If such equipment has been installed,
then you should notify the Fire Safety Officer or other
competantauthority thatits presence may
cause false alarms.
www.acornfiresecurity.com
www.acornfiresecurity.com
