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6
evolution
EVC-P
PHOTOELECTRIC SMOKE DETECTOR
INSTRUCTION MANUAL
of
3
NISM/EVC-P/01
01
Section 3 - DETECTOR MODELS
The EVC-P photoelectric smoke detector is supplied, as
standard, with four terminals.
The EVC-P has the facility to activate a remote LED
indicator or auxiliary function, as standard.
The terminals on the EVC-P detector head are
configured as follows:-
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-4 base: having 4 terminals, for standard use
with EVC-P detector including the auxiliary output
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
event of an unauthorised detector head removal, to other
detectors further on the zone.
iii)
STB-4SE base: Similar to STB-4 base, except
deeper.
iv)
STB-4SE-24VR base: Relay contact base.
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
OMNIVIEW
TM
360
o
indicator 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
cover should be removed and discarded.
NOTE: THE PLASTIC DUST COVER MUST BE RE-
MOVED FROM THE DETECTOR IN ORDER FOR THE
DETECTOR TO FUNCTION CORRECTLY.
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
conducted with the following frequency:
One month after installation:
Routine Inspection
and every 3 months
thereafter.
Every 6 months:
Operational Test
Every 12 months:
Functional Test and
Cleaning.
All above frequencies of maintenance are dependent on
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
competant authority that its presence may
cause false alarms.
