C-TEC AVAC Manual

AVAC
VOICE ALARM SYSTEM
Installation and
Maintenance Manual
Message Store
paging
active
fire
microphone
supply
present
Silence internal
Sounder
evacuation alert test
message fault
mains
fault
psu
fault
microphone
fault
system
fault
general
fault
slave
fault
A
fault
B
fault
standby
fault
speaker A
fault
speaker 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 arenot, calibration may succeed but loudspeaker circuit faults will not be detected.
ALWAYS measure the speaker circuit loads using a Loadmaster or LCR meter before calibration.
The max. load for each circuit is 60 watts, which is equivalent to a min. impedance of 166 ohms.
.
DO NOT use a multimeter as the results 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.
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AVAC VOICE ALARM SYSTEM
AVAC Installation and Maintenance Manual • Approved Document No. DAU0000402 Rev 6 • Page 2
CONTENTS
Important notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Short form wiring instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
AVAC connected to an Apollo analogue fire alarm loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
AVAC connected to an non-Apollo analogue fire alarm loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
AVAC connected to a conventional fire alarm panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
An overview of the AVAC voice alarm system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Planning the wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Mounting AVAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Connecting the panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Mains wiring and connection details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Standby battery connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Loudspeaker connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Calibrating the Loudspeaker, Fire Mic. and Master to Slave circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Fire alarm interface connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Emergency (fire) microphone connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Public address paging connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Background music connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Class change timer connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Slave AVAC wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Digital message selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Fault indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Appendix 1 - loudspeaker record sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Appendix 2 - AVAC master and slave record sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
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AVAC VOICE ALARM SYSTEM
AVAC Installation and Maintenance Manual • Approved Document No. DAU0000402 Rev 6 • Page 3
IMPORTANT NOTES
Items supplied
This product is supplied with an installation and maintenance manual, a user manual, an allen key
(for unfastening/securing the lid) and an electrical accessory pack containing a red battery lead, a
black battery lead, a battery link lead, two loudspeaker end of line modules, a 6K8 0.25 W resistor,
a spare primary mains fuse, a spare battery fuse and a selection of spare jumper links.
An AVAC master / slave record sheet (DAU0000407) is also provided in the AVAC’s accessory
pack. We strongly recommend the relevant side of this sheet (master or slave) is completed by
the engineer for future reference. Should you experience any technical problems with AVAC
our technical department will require information from this sheet in order to assist you.
System design
Voice alarm system design is beyond the scope of this document. A basic understanding of
general voice alarm system components and their use is assumed.
We strongly recommend that a suitably qualified and competent person is consulted in
connection with the design of the voice alarm system and that the system is commissioned and
serviced in accordance with the project specification and national standards. The client/fire
officer concerned with the property should be contacted at an early stage in case he or she has
any special requirements.
We recommend you read BS 5839 Part 8 (1998) : The code of practice for the design,
installation & servicing of voice alarm systems and BS EN 60849 (1998) : Sound systems for
emergency purposes (or any subsequent revisions) both of which are available at your local
reference library or from the British Standards Institute, Customer Services Dept., 389 Chiswick
High Road, London, W4 4AL. Tel: [phone]. Web: www.bsi-global.com.
Equipment guarantee
This equipment is not guaranteed unless the complete system is installed and commissioned in
accordance with national standards by an approved and competent person or organisation.
This product has been manufactured in conformance with the requirements of all
applicable EU Council Directives.
This equipment must be installed and maintained by a suitably skilled and
technically competent person.
This equipment is a piece of Class 1 equipment and MUST BE EARTHED.
This equipment operates with hazardous voltages present inside its enclosure.
DO NOT leave the enclosure door open during normal operation.
© 2004-2008. Errors and omissions excepted. The manufacturer of this product operates a policy of continuous
improvement and reserves the right to alter product specifications at its discretion and without prior notice. All of the
instructions covered in this manual have been carefully checked prior to publication. However, no responsibility can be
accepted by the manufacturer for any inaccuracies or for any misinterpretation of an instruction or guidance note.
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AVAC VOICE ALARM SYSTEM
AVAC Installation and Maintenance Manual • Approved Document No. DAU0000402 Rev 6 • Page 4
SHORT FORM WIRING INSTRUCTIONS
P23
P23
P23
P24/25
P23
4
P22
AVAC connected to an Apollo analogue fire alarm loop
Circled numbers, i.e. refer to the pages you should read for further information
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P22
AVAC VOICE ALARM SYSTEM
AVAC Installation and Maintenance Manual • Approved Document No. DAU0000402 Rev 6 • Page 5
AVAC connected to a non-Apollo analogue fire alarm loop
Circled numbers, i.e. refer to the pages you should read for further information
P24/25
P24/25
AVAC connected to a conventional fire alarm panel
Circled numbers, i.e. refer to the pages you should read for further information
AVAC MASTER
Isolator Isolator
VA405
Emergency
mic.
CD
VA406
paging
mic.
EOL
APOLLO FIRE ALARM LOOP
Batteries
Masterto slave
daisychain
AVAC SLAVE
AVAC SLAVE
AVAC SLAVE
(Max.10 slave
AVACs per master)
Loudspeakers
Background
music
source
Set
messages
230V ac IN
AVAC CONNECTION TO AN APOLLO FIRE ALARM LOOP
P23/24P23/24
P14P14
P13P13
P19
P20
CatCon
plate
APL
plate
P21
P15P15
Loudspeakers
P15P15
P22P22
230V ac IN
P13P13
230V ac IN
P13P13
Batteries
P14P14
Batteries
P14P14
Loudspeakers
P15P15
OPTION 2
Local paging and/or background
music (wired direct to slave)
OPTION 1
Global paging and/or background
music (daisychained from
master AVAC)
P22P22
Fire interface
P18
Calibrate
P16P16
Masterto slave
daisychain
P22P22
Masterto slave
daisychain
P22P22
2 x 4 core 1.5mm
2
fire
resistant cable,500m max.
EOL
EOL
EOL
EOL
EOL
2 core 1.5mm
2
fire resistant
cable,500m max.
2core 1.5mm
2
fire resistant
cable,500m max.
5 cores of Cat5 structured
cable, 200m max
4 cores of Cat5
structured
cable, 200m max.
2 cores of Cat5 structured
cable, 500m max
4 cores of Cat5 structured
cable, 500m max
2core 1.5mm
2
fire resistant cable,
CD
VA406
paging
mic.
Background
music
source
P20
CatCon
plate
APL
plate
P21
NOTE:When using Cat5 cable
audio+ and audio - must use
the same pair or interference
is likely
EOL= End of line device
P24/25
P24/25
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AVAC 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
amplifier
Prioritsed
mixer
Digital
message
store
100V
Output
transformers
20kHz
Battery
charger
12V 7AHr
VRLA
battery
12V 7AHr
VRLA
battery
Monitoring
tone
VA405
Firemans
microphone
Paging
microphone
230V
AC In
Line level slave output
XP95 Analogue loop out
End of line device
End of line device
Fault
Output
Reset
(silence)
Test
Alert
Evac
XP95 Analogue loop in
to optional slave AVAC amplifiers
(max 3 per Master)
Conventional Trigger Inputs
Background
music
CD
fuse
Power
supply
unit
(Max. 10 per master)
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AVAC VOICE ALARM SYSTEM
AVAC Installation and Maintenance Manual • Approved Document No. DAU0000402 Rev 6 • Page 7
Operation
The principal function of the AVAC voice alarm system is to generate clear, intelligible voice messages
to alert people to the presence of fire, normally under the control of a fire detection system.
When AVAC receives a message trigger from the host fire detection system, it responds by playing
an appropriate message (Evacuate, Alert or Test) from its digital message store. This message is
amplified and broadcast around the site via the system’s loudspeakers.
Three balanced line level audio inputs are also provided for the connection of the following
optional third-party equipment:-
• An emergency microphone (connected to the Fire Mic. Input) to allow live directive
announcements by the emergency services
• A paging microphone (connected to the Paging Input) to allow non-life safety paging
announcements and;
• A background music source such as CD player, radio tuner or class-change tone system (page 22)
(connected to the BGM Input).
The Paging and BGM inputs have optional link-selectable attenuators so that a wide range of
input levels can be used. The Fire Mic. input does not have an attenuator since it is designed for
use with the VA405 emergency microphone only. The level of all four audio channels (digital
message store, fire mic., paging and BGM) can be adjusted using the four internal level controls.
If multiple inputs and/or digital message triggers are active at the same time, the prioritised mixer
ensures that only the most urgent audio signal is broadcast, as indicated on the chart below:-
Priority Description
1 Emergency microphone
2Evacuate, Alert or Test message (Evacuate overrides Alert, Alert overrides Test)
3 Paging microphone
4 Background music source
The fire alarm interface
A fire detection system can be connected to AVAC via three polarized, opto-isolated trigger inputs
- Evacuate (M1), Alert (M2) and Test (M3). These inputs are designed to control the AVAC’s digital
message store and will activate when 24 V d.c. is applied to them (if an external voltage is not
available, a local 24 V d.c. output is provided for switching into the inputs under the control of the
fire detection system). All inputs are prioritised according to the messages they trigger and can be
set for latching or non-latching operation via an internal link.
When set to latch (required by BS 5839-8), triggered messages will play continuously until a higher
priority message/input is asserted or the AVAC’s reset input (RES) is activated. When set for non-
latching operation, messages will stop when the input stimulus is removed (please check with the
approving authority that this is permissible prior to installation). This facility is provided to allow
connection to fire detection systems without a silence output.
NB: AVAC cannot interpret a pulsing sounder input as Alert - all trigger inputs must be continuous.
AVAC can also be connected directly to any Apollo protocol XP95, Discovery or Xplorer analogue
addressable fire alarm loop via its LOOP input. When connected in this way, AVAC emulates an
Apollo sounder control module and must be given an individual (and optional ‘group’) address
using the two DIP switches provided to allow it to be recognised by the analogue loop. Once
addressed, AVAC responds to the fire panel’s commands by activating its Evacuate message when
it receives a continuous sounders command and its Alert message when it receives an intermittent
sounders command. It also reports any fault conditions back to the analogue loop as a general
fault allowing the host fire detection system to show the fault location accordingly.
Although Apollo’s analogue protocols do not include a Test state in their output bit configura-
tions, some fire detection systems, such as those using a C-TEC XFP fire panel, have a ‘test’ bit pat-
tern built into their software. If this is the case, AVAC’s ‘test enable’ facility allows compatible fire
detection systems to put the AVAC into test.
If required, AVAC’s conventional fire alarm interface (i.e. its M1, M2 and M3 triggers) and its ana-
logue interface (i.e. its LOOP input) can be used at the same time. If conflicting stimuli are
applied, the highest priority message always overrides other stimuli.
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AVAC VOICE ALARM SYSTEM
AVAC Installation and Maintenance Manual • Approved Document No. DAU0000402 Rev 6 • Page 8
Monitoring
In order to comply with British and European life safety standards, AVAC’s loudspeaker lines, PSU,
batteries, emergency microphone and digital message store are all monitored for short circuits,
open circuits, earth faults, discharge, disconnection and data corruption as appropriate.
Non-critical inputs such as public address paging and background music are not monitored and, in
the event of mains failure, are automatically cut off to conserve battery life. This contributes to
the AVAC’s extremely efficient standby time - typically 24 hours (plus 30 minutes running) using
2 x 7 A Hr VRLA batteries.
Provided the system is wired as detailed in this manual, a fault condition will be reported as a
sounder fault on the fire detection system to which it is connected, with more detailed fault indi-
cation provided on the front of the AVAC.
Digital message selection
All digital messages are stored in MP3 format on a monitored, non-volatile memory card that
plugs directly onto the Main PCB.
The content of these messages can be adjusted to suit the application using a series of internal
links. For example, the Evacuate message can be configured to state that ‘a situation has arisen’
or ‘a fire has been reported’ and to warn people - if appropriate - not to use the building’s lifts.
Amplifier and speaker circuits
AVAC is supplied with a minimum of two separate 60 watt Class D amplifiers (A and B). These are
designed to drive two loudspeaker circuits, each of which will accommodate up to 60 watts of
loudspeaker load, through 100 V line transformers, which step up the voltage for distribution
around the site.
An end of line device must be connected across the terminals of the last loudspeaker on each
circuit and both circuits must be calibrated at commissioning using the calibrate button to ensure
correct monitoring.
Some AVACs feature an additional ‘hot-swap’ standby amplifier that will switch in if either of the
regular amplifiers (A or B) fail, a requirement of some life safety voice alarm specifications.
Multiple AVACs and slave amplifiers
There is no limit to the number of master AVACs that can be used per system. Please note
however that the VA405 emergency microphone can be daisychained to a maximum of
10 masters only.
To increase audio coverage in areas such as warehouses, etc., up to 10 slave AVACs can be
connected to one master.
Slaves repeat all emergency microphone and digital message broadcasts that are made at the
master to which they are connected. They also feature their own paging and BGM inputs.
Therefore, if multiple masters and/or slaves are used, localised paging and background music can
be easily implemented.
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AVAC VOICE ALARM SYSTEM
AVAC Installation and Maintenance Manual • Approved Document No. DAU0000402 Rev 6 • Page 9
To comply with BS5839-8 we recommend the use of fire-resistant cables for all life safety functions
(loudspeaker, fire alarm interface, emergency microphone and master to slave wiring).
Non-life safety functions, such as paging and background music, can be wired using Cat 5
structured cable (always wire Audio + and Audio – in the same twisted pair).
Always give due consideration to voltage drop.
All wiring should come into the enclosure via the knockouts provided and be fixed tidily to the
relevant terminals. For an overview of the connections required for the fire alarm interface,
loudspeakers, emergency microphone, paging/background music equipment and slave AVACs,
please refer to the relevant sections later in this manual (see Contents, page 2).
Note that correct cable glanding is essential and due regard should be paid to any system
specifications which demand a certain cable type (providing it meets the appropriate national
wiring regulations).
PLANNING THE WIRING
All System wiring should be installed to meet the appropriate parts of BS 5839-8 (1998),
BS EN 60849 (1998) and BS 7671 (Wiring Regulations). Other national standards of
installation should be adhered to where applicable.
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AVAC VOICE ALARM SYSTEM
AVAC Installation and Maintenance Manual • Approved Document No. DAU0000402 Rev 6 • Page 10
MOUNTING AVAC
The enclosure can be surface or semi-flush mounted (see page 11). It comprises a hinged metal
lid and metal back box containing all of the system’s electronics. To protect the electronics
against damage during first fix installation, most of the PCBs are located on a removable chas-
sis plate, as shown below.
The enclosure must be sited internally in an area not subject to conditions likely to affect its
performance, e.g. damp, salt-air, water ingress, extremes of temperature, physical abuse, etc.
It should be positioned at a height where it is easily accessible and in a prominent position
within the building. Ideally, the indicators on the front of the enclosure should be at eye level.
The AVAC Enclosure
Removing the lid and chassis plate
To expose all of the base mounting holes, the lid and chassis plate should be removed from
the enclosure prior to first fix installation.
Anti-static handling guidelines: Prior to handling any of the AVAC’s internal
components, operators should rid themselves of any personal electro-static charge by
momentarily touching any sound connection to safety earth, e.g. a radiator.
To remove the lid:
•Undo the two screws on the right hand side of the AVAC using the Allen key provided.
• Hinge the lid 180° to the left and remove the lid earth strap from the base earth connection
(take care not to overbend the hinges).
• Disconnect the lid/base connecting cables (PL6 and PL5) from the Main PCB. Take care to
depress the telecoms-style locking tab on the PL6 connector to prevent damage.
•Carefully remove the four wing nuts and washers that secure the hinges.
To remove the chassis plate:
• Ensure power has been removed from the AVAC and that the Power Supply PCB is safe to
handle (see page 13).
•Pull the chassis earth strap off the spade connector on the base earth point.
• Remove all of the chassis plate’s retaining screws with the exception of the three keyhole
retaining screws at the top of the chassis plate which should be loosened by about three turns.
• Push the chassis plate up and over the three keyhole retaining screws.
The lid and chassis plate can now be removed from site to prevent accidental damage. They
should be stored in a clean, dry place which is free from vibration, dust and excessive heat.
POWER
SUPPLY
PCB
MAIN
PCB
AMPLIFIER
PCB
PL6
DIGITAL
MESSAGE
STORE
PCB
CHASSIS EARTH STRAP
CHASSIS PLATE
INDICATOR
PCB
LID/BASE CONNECTING CABLES
LID EARTH STRAP
PL2
PL1
PL5
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AVAC VOICE ALARM SYSTEM
AVAC Installation and Maintenance Manual • Approved Document No. DAU000040 Rev 6 • Page 11
Planning the cable layout in the enclosure
All low voltage wiring coming into the enclosure should be segregated away from the 100 V
loudspeaker lines and incoming mains voltages. Refer to the diagram below for guidance and
important information on how to remove the enclosure’s knockouts. Always ensure that if a
knock-out is removed, the hole is filled with a good quality cable gland. Any unused knock-
outs must be securely blanked off.
Location of knockouts for cable entry and knockout removal details
Fixing the base to the wall
Using the five mounting holes provided (see diagram below), fix the base securely onto/into
the wall. The mounting holes are suitable for use with No.8-10 or 4-5mm countersunk screws.
Assess the condition and construction of the wall and use a suitable screw fixing.
Any dust or swarf created during the fixing process must be kept out of the enclosure and
great care must be taken not to damage any wiring or components.
Internal view of the back box with PCBs removed / side view for flush mounting
Bring mains into the enclosure
through one of these knockouts
Knockouts should be
removed with a sharp tap in
the rim of the knockout using
a flat 6mm broad-bladed
screwdriver
420mm
420mm
WALL
115 mm
55 mm
CAUTION
If mounting multiple
AVAC masters (or slaves)
next to each other, take
care to leave a gap of at
least 80 mm between
each of their bases to
allow their lids to swing
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AVAC VOICE ALARM SYSTEM
AVAC Installation and Maintenance Manual • Approved Document No. DAU0000402 Rev 6 • Page 12
CONNECTING THE PANEL
Connect AVAC’s internal wiring immediately prior to commissioning and after you have refit-
ted the lid, chassis mounting plate, lid/base connecting cable and earth straps by reversing the
process described on page 10.
Before connecting any wiring to the PCBs, we recommend you check all third-party equipment
(loudspeakers, emergency microphone, paging panels, background music sources, etc) to ensure
they are correctly fitted and that cable integrity is verified throughout the installation.
It is essential that the wiring and loudspeakers are tested with a Loadmaster or LCR meter to
ensure that the total load connected to each of the loudspeaker circuits is not greater than
60 watts (not less than 167 Ohms) at 1 kHz. See page 15 for important information on the
loading of loudspeaker circuits.
DO NOT use a high voltage insulation tester with any electronic devices connected.
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AVAC VOICE ALARM SYSTEM
AVAC Installation and Maintenance Manual • Approved Document No. DAU000040 Rev 6 • Page 13
MAINS WIRING & CONNECTION DETAILS
The general requirement for the mains supply to AVAC’s power supply PCB is fixed wiring,
using three core cable (no less than 1mm2and no more than 2.5mm2) or a suitable three
conductor system, fed from an isolating switched fused spur, fused at 3A. This should be
secure from unauthorised operation and be marked ‘FIRE ALARM SYSTEM: DO NOT SWITCH
OFF’. The mains supply must be exclusive to the AVAC unit.
(As an alternative to a switched fused spur, a double pole isolating device may be used (see
diagram below) providing it meets the appropriate national wiring regulations).
DO NOT attempt to connect mains to the AVAC until you are fully conversant with the layout
and features of the power supply PCB, as described below.
The power supply PCB combines the functions of a mains to d.c. switched mode power supply
unit, battery charging unit and battery monitoring unit.
THE POWER SUPPLY PCB STORES VOLTAGES AT UP TO 400 Vd.c. AND MAY BE
LETHAL IF TOUCHED. DO NOT TOUCH THE PCB WHILST THE RED ‘HAZARDOUS
VOLTAGES PRESENT’ INDICATOR IS LIT.
≥3mm
≥0.75mm2< 2.5mm2
3A
MAIN
DISTRIBUTION
BOARD
AVAC
PSU EARTH STRAPS
DO NOT operate AVAC without
its earth straps connected in
this exact configuration
(The PSU earth strap connects the
power supply PCB to the chassis earth
post which in turn is connected to the
base earth post).
HAZARDOUS VOLTAGES
PRESENT LIGHT
When lit red, hazardous voltages
are present on the components in
the hatched area of the PCB and
this charge is only bled away
after the mains supply has been
removed. When the red light
extinguishes, the charge has
leaked away to a safe level.
Incoming Mains cable must be
segregated from other cables
and should only enter the
enclosure through one of the
knock-outs on the right side of
the enclosure. Good quality
cable glands must be fitted.
The incoming mains earth
wire MUST be connected to the
terminal marked
and not to the chassis or
base earth post.
If connecting stranded
mains cable (max 2.5mm2)
we recommend the use of
bootlace ferrules.
PRIMARYFUSE (F1)
20 x 5 mm 1 A HRC Ceramic to
IEC 127 (EN60127 Part 2).
Do not use any other type or size
of fuse in this position.
BATTERY FUSE (F2)
20 x 5 mm 5 A F to IEC 127
(EN60127 Part 2).
Do not use any other type or size
of fuse in this position.
BATTERY LEAD
CONNECTOR
(battery leads are supplied in the
AVAC’s accessory pack). See page 14
for battery position and connection
details.
NL
The Power Supply PCB
1mm2 <2.5mm2
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AVAC VOICE ALARM SYSTEM
AVAC Installation and Maintenance Manual • Approved Document No. DAU0000402 Rev 6 • Page 14
We recommend two new, good quality and fully charged 7 AHr 12 V valve regulated lead acid
batteries are used as the AVAC’s emergency stand-by power supply. These will typically
provide at least 24 hours standby time and 30 minutes alarm running time.
Note that batteries are required at all AVAC masters and slaves.
Caution: No other type of battery should be used due to risk of explosion and smaller batteries
will reduce the standby time of the system considerably.
The batteries should be connected in series and located in the enclosure as shown in the dia-
gram below. The battery leads and link wire are provided in the accessory pack.
Asophisticated battery monitoring unit protects the batteries against deep discharge by acti-
vating a cut off circuit when the stand-by supply voltage reaches 21 V approx. If batteries are
not fitted, are discharged or in poor condition, a PSU fault will show at the AVAC.
Always dispose of used batteries according to the battery manufacturer’s instructions.
STANDBY BATTERY CONNECTION
KEEP THIS
AREA CLEAR
TO ENSURE
THE AMPLIFIER
IS WELL
VENTILATED
POSITION BATTERIES HERE
(TERMINALS FACING UP)
+
–
–
+
CONN4
–+
12V 7AHr
VRSLA 12V 7AHr
VRSLA
POWER
SUPPLY
PCB
!
KEEP THIS
AREA CLEAR
TO ENSURE
THE AMPLIFIER
IS WELL
VENTILATED
POSITION BATTERIES HERE
(TERMINALS FACING UP)
+
–
–
+
CONN4
–+
12V 7AHr
VRSLA 12V 7AHr
VRSLA
POWER
SUPPLY
PCB
!
Standby battery location and connection
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AVAC VOICE ALARM SYSTEM
AVAC Installation and Maintenance Manual • Approved Document No. DAU0000402 Rev 6 • Page 15
Loudspeaker Tapping
The most common installation problem on a voice alarm system is the incorrect tapping of
loudspeakers. If they are tapped at too high a wattage, the amplifier may be overloaded. If
they are tapped at too low a wattage, the sound may be too quiet.
Loudspeaker circuits
AVAC has two loudspeaker outputs, each of which can accommodate up to 60 watts of
loudspeaker load. For example 20 loudspeakers tapped at 3 watts or 40 loudspeakers tapped at
1.5 watts. We recommend however that you allow 20% spare capacity on each loudspeaker
circuit to accomodate future changes and/or tolerances within the circuit.
The continuous average output power of each circuit is 60 watts. Signals above this level will
be compressed and the ‘Audio Limit’ LED will illuminate to indicate that the sound source is
overdriving - see pages 19, 20 or 21 for further details.
To determine the actual loading (in watts) of a loudspeaker circuit with the speakers connected,
disconnect the loudspeaker circuit at the main PCB and measure the impedance of the cable
and loudspeakers using a Loadmaster or LCR meter. Remember that the maximim load for
each circuit is 60 watts, which is equivalent to a minimum impedance of 166 ohms.
To convert impedance into power, use the following equation:
P (power in watts) = 10,000 / Z (impedance in Ohms)
Example:- Z (impedance in ohms) = 334 ohms.
10,000 / 334 = 29.94. Therefore P = 30 watts.
An end of line module (EOL) provided in the accessory pack must be physically secured and
connected across the terminals of the last loudspeaker to allow the wiring to be monitored for
open or short circuit fault conditions. In order to check that the loudspeaker line monitoring is
operating correctly, fit the EOL in an accessible location.
We recommend C-TEC voice alarm loudspeakers are used as these have been tested for
correct operation with AVAC. All loudspeakers must be suitable for 100 volt line operation.
Low impedance loudspeakers will not work, will overload the amplifier and may be
seriously damaged. Note that a form is provided on page 30 where you can record the number,
type, location and tapping of each loudspeaker used.
Typical loudspeaker circuit wiring
LOUDSPEAKER CONNECTION
OV 100V
A
DO NOT SPUR
(WIRING NOT MONITORED)
END OF
LINE UNIT
It is common practice to ‘interleave’ the loudspeaker circuits to
maximise sound distribution in the event of one of the circuits failing.
Please refer to our seperate Guide to Voice Alarm S stems for details.
OV 100V
B
TO SPEAKER
CIRCUIT B
Calibrate
SW1
IMPORTANT
To ensure the loudspeaker circuits are monitored correctly, they
MUST be calibrated using the SW1 button on the Indicator PCB
inside the lid. See page 16 for details.
Each speaker MUST have a line transformer suitable for
100 V operation tapped to the appropriate wattage
EOL
In open areas, it is common practice to ‘interleave’ the loudspeaker
circuits to maximise sound distribution in the event of one of the
circuits failing.
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AVAC VOICE ALARM SYSTEM
AVAC Installation and Maintenance Manual • Approved Document No. DAU0000402 Rev 6 • Page 16
CALIBRATING THE LOUDSPEAKER, FIRE MIC.
AND MASTER TO SLAVE CIRCUITS
The loudspeaker circuits are monitored by an intermittent 20 kHz tone which is passed down
the loudspeaker lines. Each circuit’s end of line device absorbs the tone and the current taken
is measured against the current drawn at system setup (known as the ‘reference’ value).
To store the reference value, the commissioning engineer must activate AVAC’s calibration
feature. Note that AVAC’s Fire Mic and Master to Slave circuits will be calibrated at the same
time and that prior to calibration the unit will always show a Fire Mic fault.
Calibration should ONLY be done when:-
1) Both loudspeaker circuits are complete i.e. all loudspeakers are connected,
appropriately tapped and verified and when the end of line devices (supplied) are
fitted after the last loudspeaker on each circuit.
2) Both loudspeaker circuits have been measured using a Loadmaster or
LCR meter and you have confirmed that the load on each circuit is no
greater than 60 watts (equivalent to a minimum impedance of 166 ohms).
3) The Fire Mic’s PTT input is in an untriggered state, i.e. only the 6k8 end of
line is present. If calibration is done with the Fire Mic’s PTT input in a triggered
state, AVAC will calibrate the Fire Mic. circuit incorrectly and the Fire Mic. may not
work as expected.
4) The PLK2 Local Fault link has been temporarily removed from ALL slave
AVACs. Note you MUST refit the PLK2 Local Fault links to all slaves when calibration
is complete.
To start the calibration procedure, press and continue to hold down the calibration button
(SW1) on the Indicator PCB. The indicator light (IND1) on the Main PCB will pulse slowly. DO
NOT LET GO OF THE CALIBRATION BUTTON UNTIL THE INDICATOR LIGHT STARTS TO FLASH
MORE QUICKLY. Once the flashing speeds up, let go of the calibration button. When the
indicator light goes out, the calibration procedure is complete.
Always test the system for correct operation after calibrating or recalibrating the circuits.
If any changes are made to the loudspeaker, fire mic. or master to slave circuits at any time - for
example, if a loudspeaker is added, removed or its tapping is changed - the calibration process
should be repeated to establish a new ‘reference’ level.
For more specific loudspeaker wiring information, please refer to each loudspeaker’s
individual installation instructions for advice.
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The fire alarm interface comprises two parts, a conventional system interface and an analogue sys-
temn interface. It should be noted that BS5839-8 requires all controlling inputs to be latched
and all links to be monitored. Depending on the facilities available at the controlling equip-
ment, this is not always possible. In such cases it is acceptable to have unmonitored links pro-
vided they are very close and at least IP30 protected. One way to do this is to mount the control
equipment next to AVAC so there is no gap between them.
The conventional interface
The conventional interface has four polarized inputs, Evacuate (M1), Alert (M2), Test (M3) and Reset
(RES) plus a fault relay output. All four inputs are optically isolated and designed to be active when
supplied with +24 V. For compliance with BS5839-8, all four conventional inputs are set to latch by
default (i.e. Link 3 of the PLK4 option links is supplied fitted). When a steady voltage of +24 V is
applied to an input, the relevant message plays until a higher priority message is asserted (note that
pulsing inputs are not compatible with AVAC). When the trigger voltage is removed, the selected
message will continue to play. Only when the AVAC’s Reset input is asserted will the system return to
normal. When the Reset stimulus is released no message will play unless other inputs are asserted.
Note, the fire panel’s Reset input should be set to activate when the fire detection system is
SILENCED or RESET, not just when reset.
Note that Apollo protocol analogue
systems can be connected directly to
AVAC’s analogue interface, as
described on page 18.
When interfacing a non-Apollo ana-
logue addressable fire alarm system to
the conventional interface, the M1,
M2, M3 and RES inputs are usually
triggered via one or more input/out-
put units, as shown. The I/O units
should be programmed via the fire
panel’s own programming software
to operate as appropriate. To meet
BS 5839-8, the I/O units should be
mounted adjacent to the Master
AVAC(s) such that they can be consid-
ered to be one cabinet.
When interfacing a conventional fire alarm panel to
the conventional interface, the M1 (Evacuate) input is
normally triggered via a monitored sounder circuit or
relay. The M2 (Alert) input is normally not used in
this scenario as pulsing inputs are not compatible
with AVAC. As most conventional
panels do not have a monitored
silence input that is capable of driving
AVAC’s reset input, removing Function
Link 3 on AVAC’s PLK4 option links
will set all message inputs to non-
latching.
For this arrrangement to meet the
spirit of BS5839-8, the control panel
must be mounted adjacent to the
Master AVAC(s) such that they can
be considered to be one cabinet.
AVAC VOICE ALARM SYSTEM
AVAC Installation and Maintenance Manual • Approved Document No. DAU0000402 Rev 6 • Page 17
FIRE ALARM INTERFACE CONNECTION
INPUT
MONITOR
I/O UNIT
RES
M3 (TEST)
M2 (ALERT)
M1 (EVAC)
INPUT
MONITOR
ADDRESSABLE
LOOP
–
+
+
–
+
–
–
+
I/O UNIT
NO
C
I/O UNIT
EOLD
NC
FAULT
RELAY
0V
+24V
AVAC
MAIN PCB TEST SWITCH
LOOP
ISOLATOR
LOOP
ISOLATOR
Program the two I/O units via the
fire panel’s programming
software to operate as
appropriate. Note that both I/O
units must be at rest to reset
1
2
3
4
1
2
3
4
PLK4
1
2
3
4
1
2
3
4
PLK4
Message Function
Message Function
1
2
3
4
1
2
3
4
PLK4
Message Function
1
2
3
4
1
2
3
4
PLK4
Message Function
1
2
3
4
1
2
3
4
PLK4
Message Function
Remove link 3
to make message
inputs non-latching
Interfacing a conventional fire system to AVAC’s conventional interface
RES
M3 (TEST)
M2 (ALERT)
M1 (EVAC)
NO
C
SOUNDER
CIRCUIT
EOLD
NC
–
+
+
–
+
–
–
++24V SOUNDER
CIRCUIT
0V
FAULT
RELAY
0V
+24V
AVAC MAIN PCB CONVENTIONAL
FIRE PANEL
TEST SWITCH
MONITORED
Interfacing a non-Apollo analogue addressable fire system to AVAC’s conventional interface
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AVAC VOICE ALARM SYSTEM
AVAC Installation and Maintenance Manual • Approved Document No. DAU0000402 Rev 6 • Page 18
The analogue interface
AVACs analogue interface can be connected to any Apollo XP95,
Discovery or Xplorer analogue loop (see right).
If using this method, AVAC should be given a unique ID address
using the first seven segments of the eight way DIP switch (SW2)
on the Main PCB. When polled, the green polling LED will illumi-
nate momentarily to confirm the AVAC is working correctly.
Once on the loop, the AVAC emulates an Apollo sounder control
module and responds to fire alarm system commands as such,
playing an Alert message when an Alert (intermittent sounders)
command is received and an Evacuate message when an Evacuate
(continuous sounders) command is received.
In addition to its unique ID address, AVAC can be given a ‘group’
address using the four way DIP switch (SW1). A group address is
used by the fire detection system to activate the outputs of multi-
ple AVACs simultaneously.
If this facility is used, note that individual AVACs will continue to
report back their status to the host fire detection system using
their unique ID address numbers as appropriate.
Setting AVAC’s unique ID address
Use bits 1 to 7 of the eight way DIP switch (SW2) to give AVAC a unique ID
address (i.e.13 in the example shown right with test enabled). This can be any
address between 1-126 (if group mode is not utilised) or 1-111 (if group mode
is utilised (see bottom of page).
ADDRESSABLE
LOOP
LOOP
–
+
Polling
Test
Enable
SW1
SW2
AddressGroup
123456781234
64
32
16
8
4
2
1
8
4
2
1
AVAC MAIN PCB
LOOP
ISOLATOR
LOOP
ISOLATOR
Interfacing an Apollo
protocol analogue panel
to the AVAC’s analogue
interface
1 1000000
2 0100000
3 1100000
4 0010000
5 1010000
6 0110000
7 1110000
8 0001000
9 1001000
10 0101000
11 1101000
12 0011000
13 1011000
14 0111000
15 1111000
16 0000100
17 1000100
18 0100100
19 1100100
20 0010100
21 1010100
22 0110100
23 1110100
24 0001100
25 1001100
26 0101100
27 1101100
28 0011100
29 1011100
30 0111100
31 1111100
32 0000010
65 1000001
66 0100001
67 1100001
68 0010001
69 1010001
70 0110001
71 1110001
72 0001001
73 1001001
74 0101001
75 1101001
76 0011001
77 1011001
78 0111001
79 1111001
80 0000101
81 1000101
82 0100101
83 1100101
84 0010101
85 1010101
86 0110101
87 1110101
88 0001101
89 1001101
90 0101101
91 1101101
92 0011101
93 1011101
94 0111101
95 1111101
96 0000011
97 1000011
98 0100011
99 1100011
100 0010011
101 1010011
102 0110011
103 1110011
104 0001011
Setting AVAC’s (optional) group address
Use bits 1 to 4 of the four way DIP switch
(SW1) to give an optional group address. A
group address can be any address between
112-126. More than one AVAC can have the
same group address.
105 1001011
106 0101011
107 1101011
108 0011011
109 1011011
110 0111011
111 1111011
112 0000111
113 1000111
114 0100111
115 1100111
116 0010111
117 1010111
118 0110111
119 1110111
120 0001111
121 1001111
122 0101111
123 1101111
124 0011111
125 1011111
126 0111111
(112-126 are not available
if group addressing is used)
Address 1234567
112 1111
113 0111
114 1011
115 0011
116 1101
117 0101
118 1001
119 0001
120 1110
121 0110
122 1010
123 0010
124 1100
125 0100
126 1000
OFF 0000
Address 1234 Address 1234
SW2
Address 1234567
SW2
Address 1234567
SW2
Address 1234567
SW2
SW2 SW2
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PTT SIG 0V +V
MAIN
PCB
1
Local
Fault
OPTIONAL EXTRA AVAC MASTER UNITS
Fire Mic Input
To optional
next master
AVAC
FireMic
PLK2
Master/
Phantom
Page
PLK3
/10
Audio
Limit
PTT SIG 0V +V
MAIN
PCB
2
Local
Fault
Fire Mic Input
FireMic
PLK2
Master/
Phantom
Page
PLK3
/10
Audio
Limit
PTT SIG 0V +V
MAIN
PCB
3
Local
Fault
Fire Mic Input
FireMic
PLK2
Master/
Phantom
Page
PLK3
/10
Audio
Limit
FireMic Page BGM FireMic Page BGM FireMic Page BGM
VA405
EMERGENCY
MICROPHONE
A C G H B
+ SIG 0
+ -
PTT
connect screens
Earth Stud
4 core or 2 x 2 core
AVAC VOICE ALARM SYSTEM
AVAC Installation and Maintenance Manual • Approved Document No. DAU0000402 Rev 6 • Page 19
EMERGENCY (FIRE) MICROPHONE CONNECTION
If an emergency (fire) microphone is required, you must use a VA405 microphone. Only one
VA405 should be used per system. This can be daisychained to up to ten AVAC masters as illus-
trated below. Pressing the VA405’s push to talk button will override all other audio signals on
the system, including Evacuate and Alert messages, allowing live announcements to be made.
If an emergency microphone is NOT required, to prevent a fault condition occuring you must
fit the 6K8 0.25 W resistor (supplied in the accessory pack) across the PTT and 0V terminals at
the Fire Mic input.
If required, the volume of the microphone can be adjusted using the Fire Mic level control on
the Main PCB. Please note, should its volume be set too high, the audio limit LED on the
main PCB will illuminate red to indicate that the audio signal is being clipped. If this happens,
re-adjust the Fire Mic level control until you are satisfied with the sound quality and the limit
LED flickers red only very occasionally. Failure to do so could lead to poor sound quality.
If the microphone is too loud, too quiet or too distorted, the master output level of the
VA405 may need to be adjusted. Refer to the VA405 instructions for details.
Please note, to ensure the microphone is monitored correctly, the right hand PLK2 link
(Master/Phantom) must only be fitted at the last master AVAC in the daisychain - see below
for details.
To ensure that the Emergency Mic. is
monitored correctly, the right hand
PLK2 link (Master/Phantom) must
ONLY be fitted at the last master AVAC
in the daisychain. In this example, the
link would NOT be fitted at Main PCBs
1 and 2 but at PCB 3 only.
Turn clockwise
to increase
emergency mic.
volume
Turn clockwise
to increase
emergency
mic. volume
Turn clockwise
to increase
emergency
mic. volume
Emergency microphone connection
The audio limit LED
illuminates red when the
audio signal is being clipped
due to the input or paging
volume being set too high.
If this occurs adjust the
level(s) accordingly until you
are satisfied with the sound
and the limit LED flickers
red only very occasionally.
FireMic
PLK2
Local
Fault Master/
Phantom
• If only one master AVAC is used, the Master/Phantom PLK2
link would be fitted on that AVAC’s Main PCB.
•The left hand PLK2 link (Local Fault) is used for
master/slave interaction - see page 22 for details of when this
should be fitted.
Note that the Emergency Mic input will show a fault until the system has been
calibrated as detailed on page 16
6K8
If an emergency mic. is NOT used you MUST fit a 6K8
resistor (supplied) across the PTT and 0V terminals.
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AVAC VOICE ALARM SYSTEM
AVAC Installation and Maintenance Manual • Approved Document No. DAU0000402 Rev 6 • Page 20
PUBLIC ADDRESS PAGING CONNECTION
If required, a VA406 desk microphone console can be connected to the paging input for non-life
safety public address announcements. Note that other balanced line level equipment, such as the
output from a telephone system, may be connected instead. If in doubt, please contact your distribu-
tor for details.
The paging input is designed to accept balanced line level signals of between 300 mV and 1.5 V rms.
If you wish to connect a higher line level signal, fitting the right hand PLK3 link (/10) on the Main
PCB will attenuate the input signal by a ratio of approximately 10:1.
The volume of the paging signal can be adjusted using the Page level control on the Main PCB.
Please note, should the volume be set too high, the audio limit LED on the main PCB will illuminate
red to indicate that the audio signal is being clipped. If this happens, re-adjust the Page level con-
trol until you are satisfied with the sound quality and the limit LED flickers red only very occasional-
ly. Failure to do so could lead to audio distortion.
For global paging, simply daisychain the paging input to all relevant AVAC master and slave units.
Note that if global paging is utilised, the left hand PLK3 link (master/phantom) must be fitted at
the last AVAC in the daisychain only. If local paging is used, then the left hand PLK3 link should be
fitted at every AVAC (master or slave) which has paging equipment connected directly to it).
Pressing the paging equipment’s PTT (push to talk) button will override all relevant background
music signals but have no effect on higher priority triggers (such as Alert messages, Evacuate
messages or Emergency Mic broadcasts).
PTT SIG 0V
MAIN
PCB 1
Paging Input
CAT 5 CABLE
CONTINUE DAISYCHAIN
TO NEXT AVAC FOR
OPTIONAL LARGER AREA
PAGING IF REQUIRED
PTT SIG 0V
MAIN
PCB2
Paging Input
}
Local
Fault
FireMic
PLK2
Master/
Phantom
Page
PLK3
/10
Audio
Limit
FireMic Page BGM
Local
Fault
FireMic
PLK2
Master/
Phantom
Page
PLK3
/10
Audio
Limit
FireMic Page BGM
0V
+24V
A (+24V) white/orange
C (PTT) white/green
B (0V) orange
G (Audio-/Cold) brown
H (Audio+/Hot) white/brown
CATCON PLATE
(supplied with VA406
desk mic. console)
0V
+24V
Alternatively, connect an
additional VA406 here for
localised paging
Typical public address paging (VA406 desk microphone console) connection
Turn clockwise
to increase
paging volume
MASTER
AVAC UNIT ADDITIONAL MASTER
(OR SLAVE) AVAC UNIT
If global paging is utilised, the left hand PLK3 link (Master/Phantom)
must ONLY be fitted at the last AVAC in the daisychain. In this example,
the link would be fitted at Main PCB 2 only.
• If only one master AVAC is used, the Master/Phantom PLK2 link would
be fitted on that AVAC’s Main PCB.
The audio limit
LED illuminates
red when the audio signal
is being clipped due to the
input or paging volume
being set too high. If this
occurs adjust the level(s)
accordingly until you are
satisfied with the sound
and the limit LED flickers
red only very occasionally.
Turn clockwise
to increase
paging volume
Page
PLK3
Master/
Phantom /10
• If localised paging is used, the Master/Phantom PLK2 link should be fitted at every
AVAC (master or slave) which has localised paging.
Fit the right hand PLK3 link (/10) to attenuate the paging signal by 10:1, if required.
TO VA406 DESK
MIC. CONSOLE
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