Autronica AutroSense 75 Guide

AutroSense 75
Aspirating Detector
Installation & Commissioning
Handbook
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P-ASENSE75/IE 980302

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Installation & Commissioning Handbook, ,
P-ASENSE75/IE 980302, 7483 Trondheim
Page 1
Table of Contents
1. Introduction......................................................................3
1.1 About this manual............................................................................... 3
1.2 The product......................................................................................... 3
1.3 Application ......................................................................................... 3
1.4 The reader........................................................................................... 3
1.5 Other reference documents................................................................. 4
2. Installation .......................................................................5
2.1 Recommended height for mounting................................................... 5
2.2 Dimensions......................................................................................... 5
2.3 Positioning of the detector.................................................................. 6
2.4 Mounting the detector......................................................................... 6
2.5 Cable entry.......................................................................................... 7
2.6 Cable connections............................................................................... 8
2.6.1 Introduction........................................................................... 8
2.6.2Overview................................................................................ 8
2.6.3 Terminal strips 1 and 2.......................................................... 8
2.6.4 External connection of 2 detector loops - conventional
version............................................................................................ 9
2.6.5 External connection of 1 detector loop - conventional
version............................................................................................ 9
2.6.6 External connection of detector loop - analogue
addressable system......................................................................... 10
2.6.7 Power supply......................................................................... 10
3. Installing the pipe system...............................................11
3.1 General guidelines.............................................................................. 11
3.2 Guidelines for agricultural installations ............................................. 12
3.3 Installing the pipe system in the roof/ceiling ..................................... 13
3.4 Pipe joints........................................................................................... 13
3.5 Cleaning out the pipe system following installation .......................... 13
3.6 Concealed pipes.................................................................................. 14
3.7 Connecting to the AutroSense 75 detector unit.................................. 14
3.8 Installing a “moisture trap”................................................................. 14

Installation & Commissioning Handbook, ,
P-ASENSE75/IE 980302, 7483 Trondheim
Page 2
4. Commissioning the system............................................15
4.1 Responsibility for commissioning the system.................................... 15
4.2 Pre-commissioning check-list............................................................. 15
4.3 Setting addresses - analogue addressable system............................... 16
4.4 Setting switches for monitoring the air flow...................................... 16
4.5 Power supply ...................................................................................... 17
4.6 Configuration of air-flow monitoring................................................. 18
4.7 Final installation tasks........................................................................ 19
5. Final testing .....................................................................20
5.1 Alarm test / testing of smoke transport time and symmetry............... 20
5.2 Testing of air-flow monitoring........................................................... 20
5.2.1 Introduction........................................................................... 20
5.2.2 Simulated break in a pipe...................................................... 20
5.2.3 Simulated blockage in a pipe................................................. 20
5.3 Fire simulation test ............................................................................. 21
6. Service and maintenance................................................22
6.1 Annual service.................................................................................... 22
6.2 Service check-list................................................................................ 22
6.3 Changing the filter.............................................................................. 23
7. Appendix..........................................................................24
7.1 Terminal strip 2 .................................................................................. 24
7.1.1 Internal connection for 2 loops - conventional version......... 24
7.1.2 Internal connection of detector loop - analogue
addressable system......................................................................... 25
8. Reader’s Comments........................................................27

Introduction
Installation & Commissioning Handbook, ,
P-ASENSE75/IE 980302, 7483 Trondheim
Page 3
1. Introduction
1.1 About this manual
This manual describes the installation of a smoke detector system
based on Autronica’s AutroSense 75 aspirating detector. The manual
also contains guidelines for the installation of exhaust pipes,
procedures for commissioning the system, and a brief description of
service and maintenance functions.
1.2 The product
The AutroSense 75 aspirating detector comes in 3 different versions:
• BW-75/ADR for an addressable analogue system
• BW-75/ADS for an addressable analogue system with heightened
sensitivity
• BW-75/KON for a conventional system
1.3 Application
AutroSense 75 is designed for use in all situations, including corrosive
and dusty environments. The detector can be adapted to suit the
prevailing conditions and provide the required detection level by
using detector chambers with different levels of sensitivity.
The detector can be connected to either one or two exhaust pipes.
Where the AutroSense 75 is connected to an analogue addressable
fire alarm system, each individual pipe will be allocated its own
address. In the event of an alarm being reported, the area monitored
by the respective pipe will be identified on the fire alarm control
panel.
In a conventional system both chambers will be normally connected to
the same detector loop, i.e. both pipes will monitor the same detection
zone. It is possible to connect two different detector loops to the
detector chambers to obtain information about which pipe is in alarm.
1.4 The reader
This manual is designed for use by authorised service technicians and
others responsible for the installation.

Introduction
Installation & Commissioning Handbook, ,
P-ASENSE75/IE 980302, 7483 Trondheim
Page 4
1.5 Other reference documents
Further information concerning the AutroSense 75 aspirating detector
is found in the following:
Manual Article no.
Operating Manual P-ASENSE75/FE
Data Sheet for the AutroSense 75 aspirating detector P-AS75/CE

Installation
Installation & Commissioning Handbook, ,
P-ASENSE75/IE 980302, 7483 Trondheim
Page 5
2. Installation
2.1 Recommended height for mounting
175 cm
2.2 Dimensions
100
290
365

Installation
Installation & Commissioning Handbook, ,
P-ASENSE75/IE 980302, 7483 Trondheim
Page 6
2.3 Positioning of the detector
If the pipes are to be installed in rooms with different pressures, the
detector should be located in the room with the lowest pressure.
In a building where the ventilation system causes a substantial
negative pressure, the detector should be located in the room in which
the pipe system is installed.
In instances where the detector has to be located in the room with the
highest pressure, a return pipe must be attached to the lower pipe
outlet and fed into the room with the lowest pressure. This means that
the return air will be led into the room with the lowest pressure.
2.4 Mounting the detector
The unit is fitted with 4 fixing holes:
• Mark off and drill holes for 6 mm (max.) screws (and plugs if
necessary).
• Remove the cover (the illustration shows the detector without its
cover).
• Tighten all 4 screws .
204 365
290
262
Fixing holes
Fixing holes
Filter cover
Detektor cover

Installation
Installation & Commissioning Handbook, ,
P-ASENSE75/IE 980302, 7483 Trondheim
Page 7
2.5 Cable entry
The power supply and loop cables are fed in through the underside of
the unit via threaded glands (2 such glands are provided).
The unit is also supplied with 2 lead-in holes fitted with plugs. These
can be removed as required.
Threaded glands
(View from underneath)

Installation
Installation & Commissioning Handbook, ,
P-ASENSE75/IE 980302, 7483 Trondheim
Page 8
2.6 Cable connections
2.6.1 Introduction
This chapter covers all necessary external cable connections.
IMPORTANT:
The following procedure refers to primary installation:
1. Carry out all necessary loop connections.
2. Do not connect up the power before commissioning, see Chap. 4.5.
2.6.2 Overview
1
2
3 -
4 -
-
2.6.3 Terminal strips 1 and 2
IMPORTANT! Terminal strip 1 is for all external connections, i.e.
detector loops and power.
Terminal strip 2 is for internal connections only. These connections
have already been implemented, except that with the external
connection of 1 detector loop (conventional version), endload 1
should be removed (terminal strip 2).
For further details about internal connections to terminal strip 2, see
Appendix.
N
OC MN C2 K-+-+-+
(detectors)
Loop
Fan
Terminal strip 2 - (internal connections)
Terminal strip 1
Loop
24V
DC
Error output
!

Installation
Installation & Commissioning Handbook, ,
P-ASENSE75/IE 980302, 7483 Trondheim
Page 9
2.6.4 External connection of 2 detector loops - conventional version
If the unit is connected to a conventional alarm system, the following
applies when 2 detector loops (one for each detector) are connected:
1
2
3 -
4 -
+ 24 V DC
+ 24 V DC
0 V
0 V
2.6.5 External connection of 1 detector loop - conventional version
If the unit is connected to a conventional fire alarm system, the
following applies when 1 detector loop (connected to both detectors
and exhaust pipe) is connected:
1
2
3 -
4 -
+ 24 V DC
+ 24 V DC
0 V
0 V
Endload 1 on terminal strip 2 must be removed. See detailed
information about internal connections to terminal strip 2 in
Appendix.
Loop
Loop
Terminal strip 1
Terminal strip 1
- +
Loop 1
- +
Loop 2
- +
Loop 1

Installation
Installation & Commissioning Handbook, ,
P-ASENSE75/IE 980302, 7483 Trondheim
Page 10
2.6.6 External connection of detector loop - analogue addressable system
If the unit is connected to an analogue addressable fire alarm system
the following will apply:
1
2
3 -
4 -
+ 24 V DC
+ 24 V DC
0 V
0 V
2.6.7 Power supply
IMPORTANT:
With a primary installation, power must not be connected before
commissioning – see Chap. 4.5.
1
2
3 -
4 -
+ 24 V DC
+ 24 V DC
0 V
0 V
Loop
Loop
Terminal strip 1
Terminal strip 1
(to next detector)
24V DC
out
24V DC in
+ -
- +
Loop in

Installing the pipe system
Installation & Commissioning Handbook, ,
P-ASENSE75/IE 980302, 7483 Trondheim
Page 11
3. Installing the pipe system
3.1 General guidelines
Special guidelines apply to agricultural applications.The following
general guidelines apply to the installation of the exhaust pipes:
1. The optimum internal diameter of a pipe is 22 mm (the correct
size is 25 mm piping). Other sized piping will work, but will
usually provide a slower response.
2. When more than one pipe is used, you should try to achieve a
reasonable balance (e.g. ±10% of the length) in the pipes in
order to obtain an even suction pressure.
3. If only one pipe is used, any other pipes must be plugged again.
4. The maximum total pipe length permitted is 200 metres. Note:
this corresponds to 2 lengths at 100 m, or 4 lengths at 50 m.
5. If more than two pipes are used, then the pipes must be divided
as close to the detector as possible.
6. The pipes must have an end plug with a 2-6 mm diameter hole
drilled (usually 4 mm diameter).
7. The air intake/suction holes should normally be 2.5 mm in
diameter, and each length should not have more than 20 holes.
8. The holes should be drilled at specific places in the pipes. De-
burr each sampling hole to ensure that the pipe is free from any
obstruction that may affect the airflow.
9. These rules apply to average pipe lengths. If the pipe runs start
to become excessively long (i.e. more than 60 metres), the
sampling holes should be slightly smaller in diameter (down to
2 mm), and the end-plug holes slightly larger (6 mm).
10.With long pipe runs, the number of intakes with a diameter of 2
mm may be increased to 25.
11.To cover an area as effectively as possible the sampling holes
should be laid out in a grid pattern.

Installing the pipe system
Installation & Commissioning Handbook, ,
P-ASENSE75/IE 980302, 7483 Trondheim
Page 12
12.To help identification and location, each individual hole should
be marked with a white, circular label with a hole at the centre
(these can be supplied). The pipe and position of each
detection hole should be marked with a warning label as in the
example below.
13.The pipe and position of holes should be well-marked. Below is
shown a warning label for suitably marking the pipe system.
3.2 Guidelines for agricultural installations
For guidelines for agricultural installations, reference is made to the
insurance companies’ regulations for fire alarm systems.
AutroSense 75 includes among the following:
• maximum single pipe length is 46 m
• maximum number of pipe lengths is 2 x 46 m
• minimum number of holes per room is 2
• minimum distance from hole to wall is 0.5 m
• maximum distance between holes is 5 m
• pipe loops up to 30 m long should have sealed ends
– sampling holes should not be less than 3 mm in diameter
• pipe loops longer than 30 m should have open ends
• maximum distance from the pipes to roof is 10 m
• under a saddle roof, the the pipes should be installed a minimum
0.5 m and maximum 1 m from the ridge

Installing the pipe system
Installation & Commissioning Handbook, ,
P-ASENSE75/IE 980302, 7483 Trondheim
Page 13
3.3 Installing the pipe system in the roof/ceiling
To cover a fire zone in a room, the exhaust/suction pipes should be
located either directly under the ceiling panels or with a maximum
distance of 100 mm to the panels, and laid out in one, two, three or
four runs to cover the whole zone area.
For ceiling/roof installations, the sampling holes should be 25 mm,
but not more than 100 mm, below the ceiling/roof, and should point
downwards into the room. This design ensures that the holes are
below the thin layer of warm air that usually forms under ceilings in
heated rooms or under real fire conditions, and which causes smoke to
layer.
From a point of view of installation and maintenance, the most
effective way of fixing pipes in a ceiling/roof is with standard pipe
fixing clips designed to fit the external diameter (OD) of the pipes.
3.4 Pipe joints
All joints should be glued.
3.5 Cleaning out the pipe system following installation
Following installation the pipe system should be thoroughly cleaned
out by, for example, by drawing a rag through the pipes attached to a
length of wire.
The system can also be cleaned out by removing the end plug and
using an air pressure hose in the opposite direction to the normal air
flow i motsatt retning av normal luftstrøm.

Installing the pipe system
Installation & Commissioning Handbook, ,
P-ASENSE75/IE 980302, 7483 Trondheim
Page 14
3.6 Concealed pipes
Concealed pipes should be secured to ceiling girders or support
girders with standard pipe clamps or self-locking clips of nylon.
3.7 Connecting to the AutroSense 75 detector unit
The 2 inlets on the top of the detector unit are designed for receiving
25 mm diameter pipes. These should be glued fast in the inlets.
3.8 Installing a “moisture trap”
In environments with extremely high humidity it may be necessary to
use a moisture trap to prevent condensation entering the detector.
Air moisture has a tendency to condense at bends in the pipes. This
will collect at the bottom of the “U” and run into the condensation
trap.
When the condensation trap (enlarged in the diagram)
fills up, water will automatically run out when the
water level rises above the highest point on the
drainage pipe. As long as the trap contains water the
system will remain airtight, and it will be impossible
for air to enter the pipe via the trap.
The condensation trap(s) should be located
immediately in front of the inlet to the detector (this
applies to both pipes). Several condensation traps can
be used if the humidity is extremely high. A trap should
be mounted at the lowest point in the pipes to avoid the
system being blocked by condensation.
1 m
Condensation trap
AutroSense 7
5

Commissioning the system
Installation & Commissioning Handbook, ,
P-ASENSE75/IE 980302, 7483 Trondheim
Page 15
4. Commissioning the system
4.1 Responsibility for commissioning the system
Commissioning and voltage setting should only be carried out by
authorised technical personnel.
4.2 Pre-commissioning check-list
The following check-list should be implemented prior to
commissioning the system:
1. Check that all equipment, electrical wiring and pipe loops are as
per specification and that the installation is in accordance with the
drawings.
2. Check that all the cables have being connected to the correct
terminals and with correct polarity.
3. Check that the cables are free from external voltage.
4. If the AutroSense 75 detector unit is connected to a analogue
addressable fire alarm system:
- check that the interface board and detector is coded to the
correct address
5. Check that the sampling holes are drilled at specified locations in
the exhaust pipes. De-burr each sampling hole to ensure that the
pipe is free from any obstruction that may affect the airflow.
6. Check that all markings, instructions and layout diagrams are in
accordance with the specifications.
7. Check that the pipes are properly fixed, that all joints are sealed,
and that the system is cleaned out.
8. Check that the ends of the pipes are open, that there are no strong
air currents around the pipes, and that ends of concealed pipes (e.g.
pipes installed above the ceiling) are led down into the room and
have the same pressure as the detector.
9. Check that the return pipe ends in either the same room as the
detector, or the same room in which the pipe system is installed,
or in a low pressure zone relative to the exhaust pipe.

Commissioning the system
Installation & Commissioning Handbook, ,
P-ASENSE75/IE 980302, 7483 Trondheim
Page 16
4.3 Setting addresses - analogue addressable system
• Unscrew the detector cover.
The detectors are equipped with 7 address switches marked with the
following digital values: 1, 2, 4, 8, 16, 32 and 64. The correct address
is found by summing the values of the switches that stand in the
OPEN position. This is when the switches are pushed/flicked towards
the market value, i.e. downwards in the diagram.
The diagram below shows the switches in the CLOSED position.
The examples below show the switch setting for respectively address
11 and address 68.
Important:
Note that also the BNB-35 addressing unit for fault monitoring must
be given the correct address.
• Replace the detector cover, and tighten the screws.
4.4 Setting switches for monitoring the air flow
• Depending on whether both pipes are connected, or whether only
the left or right pipe is connected, set the switch S2 to configure
air-flow monitoring in:-
both pipes left pipe right pipe
64 32 16 8 4 2 1
64 32 16 8 4 2 1 64 32 16 8 4 2 1
Switch setting for
address 11 (8+2+1) Switch setting for
address 68 (64+4)
Closed position
Open position
S2

Commissioning the system
Installation & Commissioning Handbook, ,
P-ASENSE75/IE 980302, 7483 Trondheim
Page 17
4.5 Power supply
When all pre-commissioning checks have been completed and the
addresses (analogue addressable system only) and switches for air-
flow monitoring have been set, then the unit can be connected to the
power.
• Connect up the 24V DC supply (taken from the external 24V DC
outlet on the control panel).
1
2
3 -
4 -
+ 24 V DC
+ 24 V DC
0 V
0 V
The detector indicators will show the following configuration when
the front cover is removed:
• The green indicator (lower right) marked POWER will come on.
You can now configure the detector, i.e. the detector has to «learn»
the exact airflow in the pipe system.
Loop
Terminal strip 1
24V DC
out
24V DC in
+ -
LEARN
FILTER L FLOW R
POWER

Commissioning the system
Installation & Commissioning Handbook, ,
P-ASENSE75/IE 980302, 7483 Trondheim
Page 18
4.6 Configuration of air-flow monitoring
The air-flow monitoring configuration is an automatic function. This
will ensure that the upper and lower air flow limits are correct.
1. Activate the configuration by pressing and holding down for 2
seconds the “LEARN” button marked S1 (see diagram below).
2. Observe the following “LEARN” mode:
- The yellow indicators will flash depending on the switch setting
Ý left pipe: only the
FILTER L indicator will flash
Ý right pipe: only the
FLOW R indicator will flash
Ý both pipes: both
FILTER L and FLOW R will flash
- The red
LEARN indicator will come on
- The green
POWER indicator will come on
3. Wait approx. 5 minutes (the “learning” period)
4. Observe at “learning mode time-out” (after approx. 5 minutes) that
the yellow
FILTER L and/or FLOW R indicator(s) will go out,
while the red
LEARN indicator will start to flash.
5. If the detector accepts the measurements during the period, the red
LEARN indicator will flash a few times, and then go out. The
configuration of airflow monitoring is done for the actual pipe(s).
Only the green indicator should be lit.
If the detector does not accept the measurements as valid values, the
indicators will show the following:-
• The red LEARN indicator will continue flashing.
• The yellow FILTER L indicator will start to flash.
There are several reasons why the detector will not accept the
measurements. For example, the switches may be set incorrectly. If
only one pipe is connected to the aspirating detector, check that the
switch setting is correct (left or right pipe, see Chap. 4.4). The could
even be a fault in the detector.
• Rectify the problem and repeat the configuration procedure.
S1
F
LEARN
FILTER L FLOW R
POWER