C-TEC AVAC User Manual

AVAC
VOICE ALARM SYSTEM
Installation and
Maintenance Manual
Message Store
paging
a
ctive
f
ire
microphone
supply
p
resent
Silence internal
Sounder
e
vacuation alert test
message fault
mains
fault
psu
fault
microphone
fault
s
ystem
fault
g
eneral
fault
s
lave
fault
A
fault
B
fault
s
tandby
fault
s
peaker A
fault
s
peaker B
fault
Amplifier & Speaker faults
Designed to comply with BS5839 : Part 8 : 1998
& EN 60849 : 1998
AVAC - Life Safety Voice Alarm System
Approved Document No. DAU0000402 Rev 6
ALWAYS make sure the end of line devices (supplied) are fitted after the last loudspeaker.
If they ar
e not, calibration may succeed but loudspeaker cir
cuit faults will not be detected.
ALWAYS measure the speaker circuit loads using a Loadmaster or LCR meter before calibration.
The max. load for each cir
cuit is 60 watts, which is equivalent to a min. impedance of 166 ohms
.
.
DO
NOT
use a multimeter as the r
esults will be meaningless.
The most common installation problem on voice alarm systems is loudspeakers being tapped at too high a
wattage and overloading the amplifier which causes clipping of the monitoring tone signal.
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