Apollo ORB-OP-12001-APO Produkthandbuch - Seite 10

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1. Technical Data

ORBIS

WHERE TO USE HEAT

DETECTORS

Heat detectors are used in applications

where smoke detectors are unsuitable.

Smoke detectors are used wherever

possible since smoke detection provides

earlier warning of fire than heat detection.

There are, however, limits to the

application of smoke detectors and these

are described in the section 'features of

Orbis' on page 4.

Heat detectors should be used if there is

a danger of nuisance alarms from smoke

detectors.

Fig. 3

ORBIS HEAT DETECTOR

The Orbis range incorporates seven heat

detector classes to suit a wide variety of

operating conditions in which smoke

detectors are unsuitable.

The European standard EN54-5:2001

classifies heat detectors according to the

highest ambient temperature in which

they can safely be used without risk of

false alarm. The classes are identified by

the letters A to G. (Class A is subdivided

into A1 and A2.) In addition to the basic

classification, detectors may be identified

Choosing a heat detector

USE A1S or A2S

ORBIS

HEAT

DETECTOR

Part Number ORB-HT-11001-APO

by a suffix to show that they are rate-of-

rise (suffix R) or fixed temperature (suffix

S) types.

All heat detectors in the Orbis range are

tested as static or rate-of-rise detectors

and are classified as A1R, A1S, A2S, BR,

BS, CR and CS.

Heat Detector Response Modes

Class

Application

(EN54–

Temperature

5:2001)

Typical Max

A1R

A1S

A2S

Table 1

Static Response

Temperature °C

Min

Typ

Max

100