Technical Manual: EVC-H - 000014 (Changes are subject to DCRN)
3
• Ref No: NISM/EVC-H/05 • Date: 23.01.19 • Issue: 5
• evolution • EV C-H • heat detector instruction manual
Rem. Ind. (5)
OPERATION
INDICATOR
VOLTAGE
STABILISER
+ve
(3)
-ve
(1)
-ve
(6)
RECTIFIER
AND
FILTER
SWITCHING
UNIT
COMPARATOR
UNIT
INTERNAL
REFERENCE
SENSING
THERMISTOR
Fig. 1.
Block Diagram of
EVC-H
Detector Circuit
Fig. 1
CONTENTS:-
Section 1
Introduction
Page 3
Section 2
Operation
Page 3
Section 3
Detector Models
Page 4
Section 4
Base Models
Page 4
Section 5
Installation
Page 5
Section 6
Connections
Page 5
Section 7
Maintenance &
Page 6-7
Cleaning
Section 8
Specification
Page 8
Section 9
EMC
Page 9
Section 10
Dimensions
Page 9
Section 11
Disposal
Page 10
Section 12
ROHS Compliance
Page 10
Statement
Section 1 - INTRODUCTION
The
EVC-H
is an attractively styled, fast response, low profile
heat detector.
It has been designed to replace any previous Nittan heat detector.
EVC-H features:
• Low profile, stylish appearance
• Different response grades available
• Non-polarised terminals
• Unauthorised head removal signal facility
• Low monitoring current
• Patented OMNIVIEW™ 360º LED alarm indicator
• Remote indicator output
• Compatible with UB-4, UB-4SD and STB-4SE bases
Section 2 - OPERATION
The
EVC-H
range of heat detectors are non mechanical
and use a thermistor of low thermal mass as the sensing
element giving a fast response. Although these detectors
operate on a fixed temperature threshold only, their fast
response makes them generally suitable for use where
rate-of-rise detectors would be used.
