C-TEC AVAC User Manual

A
VAC VOICE ALARM SYSTEM
AVAC Installation and Maintenance Manual • Approved Document No. DAU0000402 Rev 6 • Page 6
AN OVERVIEW OF THE AVAC VOICE ALARM SYSTEM
AVAC is a low-cost, high-quality modular voice alarm system specially designed to simplify the
provision of a fully BS 5839 part 8 (1998) compliant voice alarm system.
In one compact wall-mountable enclosure, AVAC comprises:-
• Conventional and analogue (Apollo XP95/Xplorer/Discovery) fire alarm interfaces.
• A high-quality digital message store containing programmable Evacuate, Alert and Test messages.
• A prioritised mixer.
• Three balanced line level inputs for the (optional) connection of an emergency microphone,
paging/public address equipment and a background music source.
• Two x 60 watt Class D amplifiers (plus an optional standby amplifier), each of which will
accommodate up to 60 watts of loudspeaker load.
• An EN54-4 compliant switch-mode power supply and battery charger.
• Space for 2 x 7 AHr VRLA batteries typically providing at least 24 hours (standby) and
30 minutes (alarm running) time.
• A slave line level output allowing the connection of up to 10 slave AVACs.
(Slave AVACs are typically used to extend loudspeaker coverage in areas such as warehouses.
They also allow greater flexibility in the segregation of public address paging and
background music distribution as they have their own paging and background music inputs).
The fact that multiple AVACs (and slaves) can be connected to one fire detection system makes
the AVAC voice alarm system ideal not just for simple one zone installations but for virtually all
small to medium sized applications, including phased evacuation projects, in areas such as hotels,
leisure centres and licensed premises.
An overview of an AVAC Master
1
2
3
4
Optional
standby
amp
lifier
Prioritsed
mixer
Digital
message
store
100V
Outpu
t
transformers
20kHz
Battery
charger
12V 7AHr
VRLA
battery
12V 7AHr
VRLA
battery
Monitoring
tone
VA4
05
Firemans
microphone
Paging
microphone
230V
AC In
Line le
vel slave
output
XP95 Analogue loop out
End of line d
evice
End of line d
evice
Fault
Output
Reset
(silence)
Test
Alert
Evac
XP95 Analogue loo
p in
to o
ptional slave
AVA
C
amplifiers
(max 3 per
Master)
Convention
al Trigger
Inputs
Backgro
und
music
CD
fuse
Power
supply
unit
(Max. 10 per master)
www.acornfiresecurity.com
www.acornfiresecurity.com

C-TEC AVAC Specifications

Power Supply and Charger

AC input	230 V a.c +/- 10% 50/60 Hz
Internal power supply	27 V d.c. Nominal
Max continuous output current	5A @ 230 V a.c.
Pulse peak output current	7A @ 230 V a.c.
Battery size and type	2 x 12 V 7 AHr VRLA connected in series
Max Battery Charge current	0.5 A

Inputs

BGM input level	230 mV RMS
BGM with link input level	2.3 V RMS
Page input level	230 mV RMS
Page with link input level	2.3 V RMS
Fire Mic input level	230 mV RMS

Outputs

Max Output AUX 24 V	100 mA
Max Output Fire Mic 24 V	100 mA
Max Speaker Output	100 V 0.6 A RMS (60 W) x 2
Output power	2 x 60 W continuous average power
Frequency response at 30 W load	152 Hz to 12 kHz

Battery Calculations

Average standby current at full load	97 mA
Average alarm current at full load	1.2 A
Loudspeaker Monitoring Tone	20 kHz
Frequency response on Page and BGM	220 Hz to 6.2 kHz