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EVC-P
PHOTOELECTRIC SMOKE DETECTOR
INSTRUCTION MANUAL
of
2
NISM/EVC-P/01
01
Section 1 - INTRODUCTION
The EVC-P is an attractively-styled, low profile
photoelectric smoke detector for use in conventional fire
detection systems.
The EVC-P has a chemically etched, stainless steel
insect screen therefore reducing the ingress of insects
and airborne contaminants.
EVC-P features:
* Optical detector, detecting visible particles
of combustion
* Low profile, stylish appearance
* Supplied with protective dust cover, (remove
during commissioning)
* Non-polarised terminals
* Unauthorised head removal signal facility
* Low monitoring current
* Patented OMNIVIEW
TM
360
o
LED fire alarm indicator
* Remote indicator output
* Compatible with STB-4, STB-4SD and STB-4SE
bases
Section 2 - EVC-P OPERATION
The smoke chamber of the EVC-P is constructed so
that light cannot enter from outside, but smoke can pass
through the chamber slots. The EVC-P utilises the light
scatter sensing principle. The LED pulses every 8
seconds to maintain a low monitoring current. A quick
charge time (20 seconds) is also achieved. The detector
incorporates an alarm verification function which requires
two successive pulses before an alarm is given.
The interval between the first and second pulse is
automatically reduced to four seconds after the first
alarm level is monitored. The detector design provides
strong immunity to air velocities, contamination and RF
interference.
The geometry of the smoke chamber and optics support
assembly is designed to give the best possible signal to
noise ratio, resulting in excellent response
characteristics.
CONTENTS:-
Section 1
-
Introduction
- Page 2
Section 2
-
Operation
- Page 2
Section 3
-
Detector Models
- Page 3
Section 4
-
Base Models
- Page 3
Section 5
-
Installation
- Page 3
Section 6
-
Maintenance &
Cleaning
- Page 3
Section 7
-
Specification
- Page 4
Section 8
-
Environmental
Parameters:-
- Page 5
- Temperature
- Page 5
- Humidity
- Page 5
Section 9
-
EMC
- Page 5
Section 10 -
Connections
- Page 6
Section 11 -
Dimensions
- Page 6
