Bosch Security Systems | 2006-06 | 9922 141 10377 en
Plena Voice Alarm System | Installation and User Instructions | Introduction en | 17
3.2 Swimming pool
3.2.1 Introduction
Swimming pools and other indoor sports and
recreational facilities are typical examples of smaller
applications with few zones. The main priorities are
excellent speech intelligibility and compliance with
IEC60849 standard (and its national equivalents),
although music in different areas is optional. An EVAC
system for a swimming pool requires voice alarm
functionality with public address functionality for
regular announcements and background music
(optional). To ensure that all visitors in the relatively
noisy pool area hear emergency messages, the power
output for that zone is relatively high. Other areas, such
as the changing rooms and offices, have lower power
requirements.
3.2.2 Summary of requirements
• Typically up to 6 zones
• Speech intelligibility is the main priority
• High power requirement in the noisy pool area
• Fireman’s panel by fire exit
• Call station in office/reception
• Additional public address functions for
announcements
•BGM
3.2.3 Solution for a 5-zone system
The Plena Voice Alarm System controller handles
routing to up to 6 zones, so no additional routers are
required. The office/reception is equipped with a call
station plus keypad for individually addressing zones,
while a fireman’s panel (with overall priority) is built in
by the emergency exit. The Plena Voice Alarm System
is a two-channel system, so BGM can still be provided
in zones not receiving a call.
3.2.4 Power requirements
The system controller has a built-in 240 W power
amplifier, making it possible to drive up to 40
loudspeakers with a power handling capacity of 6 W
each. The pool area requires highpower music horn
loudspeakers qualified for use in a high humidity
atmosphere. The snack bar uses cabinet loudspeakers
for music reproduction. The zones are defined as
indicated in the table. An additional Plena Power
Amplifier is used for two-channel operation and as a
spare amplifier.
3.2.5 Layout
See figure 3.2, table 3.3 and table 3.4
table 3.3: Zones
Zone Description Power
Z1 Indoor pool area 5 x 30 W
Z2 Children’s pool area 2 x 10 W
Z3 Changing rooms 4 x 6 W
Z4 Snackbar 4 x 6 W
Z5 Office 2 x 6 W
Tot al 230 W
table 3.4: Units
Unit Description No.
LBB1990/00 Controller 1 x
LBB1996/00 Remote control 1x
LBB1956/00 Call station 1x
LBB1957/00 Call station keypad 4x
LBB1930/00 Power Amplifier (240 W) 1x
PLN-DVDT DVD Tuner 1x
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