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Apollo Smoke Detector XP95 Manuale di installazione e manutenzione

Fig 3 Mounting plate, supplied with detector, and optional bracket, part no 29600-203

The adjustable mounting bracket is used wherever it is necessary to adjust the viewing

angle up or down or left to right. It has two ﬁ xing holes of 6.35mm diameter at 58mm

centres.

Flame detectors should be ﬁ tted to solid walls or to rigid constructions that do not move

and are not subject to vibration.

Wiring

The ﬂ ame detector has ﬁ ve connections: Line 1, Line 2, +Remote, –Remote and functional

earth/screen. The connections are accessed by removing the front plate of the ﬂ ame

detector. The cable is passed through the gland at the base of the detector. See Fig 4 for

connection diagram.

L2+

L1-

R+

R-

Fig 4 Flame detector wiring connections

Terminal Descriptions

+L2

+Line IN and OUT

–L1

–Line IN and OUT

+Remote LED

–R

–Remote LED

SCREEN

Functional Earth/Screen (Isolated)

Terminals 6 to 8 are not used

Quantities Required and Positioning of Detectors

The number of detectors required and their positioning depends on:

• the anticipated size of the ﬂ ame

• the distance of the ﬂ ame from the detector

• the angle of view of the ﬂ ame detector

The XP95 ﬂ ame detector is designed to operate to Class 1 performance as deﬁ ned in EN54:

Part 10. The detector will, therefore, detect a yellow ﬂ ickering ﬂ ame of approximately 0.1m²

or a clear ﬂ ame of 0.25m² at 25m.

In fact, the ﬂ ame detector will detect ﬁ res at distances of up to 40 metres, but the ﬂ ame size

at such distances needs to be proportionally greater in order to be sure of reliable detec-

tion. Thus the yellow ﬂ ickering ﬂ ame that can be detected at 25m, provided that its size is

not less than 0.1m², will have to be 0.4m² in order to be detected at 40 metres. In a rectan-

gular room the distance from the ﬂ ame detector to the ﬁ re is calculated by the formula:

L² + W² + H²

In the example shown in Fig 1 the room in which the ﬂ ame detector is to be installed meas-

ures 20m x 10m x 5m; the distance from the detector to the ﬂ ame will therefore be:

20² + 10² + 5²

= 22.9m

Height

Width

Length

Fig 1 Calculation of distance from detector to ﬂ ame