Bosch FAS-420-TM-R User manual

FAS-420-TM series
Aspiration smoke detector LSN improved
FAS‑420‑TM series
en Operation guide

Aspiration smoke detector LSN improved Table of contents | en 3
Bosch Sicherheitssysteme GmbH Operation guide 2020.04 | 5.1 | F.01U.088.878
Table of contents
1Safety 6
2General 6
2.1 Introduction 6
2.2 Warranty 6
2.3 Copyright 6
2.4 Disposal 7
3Technical specifications 7
3.1 Product description 7
3.2 Areas of Application 8
3.3 System overview 11
3.4 Functions 12
3.5 FAS‑420‑TM Aspiration smoke detector series and accessories 16
3.5.1 Overview 16
3.5.2 Connections 17
3.5.3 FAS‑420‑TM LEDs 18
3.5.4 FAS‑420‑TM‑R LEDs 18
3.5.5 FAS‑420‑TM‑RVB LEDs 18
3.5.6 FAS‑ASD‑DIAG Diagnostic Software 19
3.5.7 Remote Indicators 19
3.6 Pipe system components 20
3.6.1 Overview 20
3.6.2 Air Sampling Openings 21
3.6.3 Ceiling lead-through 22
3.6.4 Air-return pipe for pressure areas and atmospheric loads 23
3.6.5 Air filters for dusty areas 23
3.6.6 Water Separator for Humid Areas 24
3.7 Scope of Delivery: Smoke Aspiration System 25
3.8 Technical specifications 27
3.8.1 FAS‑420‑TM series Aspiration smoke detectors 27
3.8.2 Pipe system 29
3.8.3 Smoke Aspiration System Components 29
4Planning 30
4.1 Regulations 30
4.2 Principles of pipe planning 31
4.3 Airflow Monitoring 33
4.4 Defining the Response Sensitivity 34
4.5 Planning Limits 35
4.6 Standard pipe planning 36
4.6.1 Determining the Necessary Accessories 36
4.6.2 Pipe Planning with Pipe Accessories 36
4.6.3 Planning with air filter 37
4.6.4 Opening Diameter 38
4.7 Planning with single-hole monitoring 40
4.7.1 I-pipe system 40
4.7.2 U-pipe system 41
4.7.3 M-pipe system 43
4.7.4 Double U‑pipe system 44
4.8 Simplified pipe planning 45

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4.8.1 I‑Pipe System - Simplified Planning 45
4.8.2 U‑Pipe System - Simplified Planning 46
4.8.3 M-pipe System - Simplified Planning 47
4.8.4 Double U‑Pipe System - Simplified Planning 47
4.8.5 Project planning with branch pipes 48
4.9 Planning for forced airflow 50
4.10 Planning with air sampling hose 53
4.11 Planning with air return 54
4.12 Power Supply 55
5Installing the Aspiration smoke detector 56
5.1 General 56
5.2 Setting the detector address 57
5.3 Installing the unit 57
5.4 Connection to the fire panel 62
5.4.1 Electrical Connection 62
5.4.2 LSN Configuration 63
5.4.3 Parameter Settings via Programming Software 63
5.4.4 Settings via the FAS‑ASD‑DIAG Diagnostic Software 64
5.5 Data logging 65
6Installation of the pipe system 65
6.1 Length Change of the Pipe System 67
6.2 Air sampling openings 67
6.3 Ceiling Lead-through 69
6.4 Monitoring with Forced Airflow 69
6.4.1 Detection at Intake and Exhaust Openings 69
6.4.2 Detection in the Bypass 70
6.5 Air filter 70
6.5.1 Installing the Air Filter Box 70
6.6 Air-return pipe 71
6.7 Three-way tap 71
6.8 Water separator 72
6.9 Test Adapter 73
7Commissioning 74
7.1 Preparation 74
7.2 Detection Module Commissioning 74
7.3 Calibrating the Airflow Sensor 75
7.3.1 Air-Pressure-Independent Calibration 75
7.3.2 Air-Pressure-Dependent Calibration 75
7.4 Checking the Detection Module and Alarm Transfer 76
7.5 Checking Malfunction Transmission 76
7.6 Checking Airflow Monitoring 77
7.7 Functional Test of Airflow Sensors 77
7.7.1 Preparations for the Functional Test 78
7.7.2 Conducting the Functional Test 79
7.8 Fire Source Identification Commissioning 80
8Maintenance 81
8.1 Visual check 81
8.2 Detection Module and Alarm Transfer 81
8.3 Pipe System 81

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8.4 Replacing the Detection Module 82
8.5 Replacing the Air Filter in the Housing Base 83
8.6 Filter Change on the Filterbox 84
8.7 Blowing-out Process for the Pipe System 85
8.8 Checking the Airflow Sensor Calibration 85
8.9 Testing the Fire Source Identification 87
8.10 Airflow monitoring 87
8.11 Malfunction Transmission 87
8.12 Maintenance Intervals 87
9Appendix 88
9.1 DIP Switch Settings for Detector Addresses 89
9.2 Planning without air filter 90
9.2.1 Without any other pipe accessories 91
9.2.2 With water separator 91
9.3 Planning with Air Filter 91
9.3.1 Without Any Other Pipe Accessories 92
9.3.2 With water separator 92
9.4 Test Log for Aspirating Smoke Detectors in the FAS‑420‑TM Series 92
Index 96

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2020.04 | 5.1 | F.01U.088.878 Operation guide Bosch Sicherheitssysteme GmbH
1 Safety
The following symbols identify points in this operation guide that require particular attention
in order to guarantee smooth operation and prevent damage.
Notice!
Operational malfunction can be prevented and operational improvements can be achieved by
observing these instructions.
!
Caution!
This symbol warns against actions and behavior which, if disregarded, could cause property
damage.
!
Warning!
This symbol warns against actions and behavior which, if disregarded, could cause personal
injury.
2 General
2.1 Introduction
This operation guide describes the smoke aspiration systems featuring FAS-420-TM series
Aspirating Smoke Detectors and the associated aspiration pipe system.
The FAS-420-TM designation in this operation guide refers to all FAS-420-TM series versions.
Specific references are made to differences between the individual versions.
2.2 Warranty
The operation guide is subject to technical modification without prior notice and makes no
claim to completeness. Our "delivery and installation conditions" apply as a matter of
principle. Warranty and liability claims in case of personal injury and property damage cannot
be asserted if they are based on one or more of the following causes:
– Insufficient attention to the instructions with respect to planning, installation of the
aspirating smoke detector, installation of the pipe system, commissioning and
maintenance
– Use of the smoke aspiration system contrary to the regulations
– Insufficient monitoring of wearing parts
– Faulty repairs
– Arbitrary constructional changes to the smoke aspiration system
– Acts of God.
Bosch Sicherheitssysteme GmbH, hereinafter referred to as Bosch, assumes no liability for
damage or malfunction arising through failure to comply with this operation guide.
!
Caution!
The equipment may only be installed by authorized and qualified personnel!
2.3 Copyright
The copyright to this operation guide remains with Bosch.

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This operation guide is intended exclusively for installation engineers and their employees.
Reprinting this operation guide or extracts thereof is permitted for internal purposes only.
2.4 Disposal
Unusable electrical and electronic devices or modules must not be disposed of with normal
household refuse. They must be disposed of in compliance with the applicable regulations
and directives (e.g. WEEE in Europe).
3 Technical specifications
3.1 Product description
Aspirating Smoke Detectors from the FAS-420-TM series are active fire detection devices that
are connected directly to the Local SecurityNetwork (LSN) improved version for early fire
detection. They are used for space and equipment protection as well as for monitoring air
conditioning units or ducts (provided that the FAS-420-TM is installed outside of these units or
ducts). You can also pinpoint the exact location of the fire using the innovative fire source
identification operation.
FAS-420-TM Aspiration smoke detector series were developed specifically for connection to
Bosch fire panels with LSN improved version technology and therefore offer the following
extended features:
– Flexible network structures, including T-tapping with no additional elements
– Up to 254 LSN-improved elements per loop or stub line
– Unshielded cable can be used.
The FAS-420-TM series also offers all the established benefits of LSN technology. The
operating data and fault messages can be read off the fire panel's operating and display unit.
Variants
All FAS-420-TM Aspiration smoke detector series have LEDs for operating mode, malfunction
and main alarm, and also offer an infrared diagnostics port. In addition to this, the
FAS‑420‑TM‑R and FAS-420‑TM‑RVB variants offer an optical fire location display for up to five
zones. The FAS‑420‑TM‑RVB also includes a internal alarm display and a 10-segment smoke
level display.
Fire source identification
Innovative fire source identification technology allows the exact location of the fire to be
pinpointed by monitoring up to five distinct neighboring zones. To enable the emergency
response teams to intervene as quickly as possible, the location of the fire can also be
identified using the FNS‑420‑R LSN Strobes, forexample, which are assigned to the various
monitoring ranges.
Sensitivity
FAS-420-TM series Aspirating Smoke Detectors have a response sensitivity of 0.5%/m to 2%/m
light obscuration. The sensitivity levels can be selected according to the area of application
using the fire panel's programming software (see Parameter Settings via Programming
Software, page 63 ). The smoke level display on the FAS‑420‑TM‑RVB model allows a
response sensitivity of 0.05%/m to 0.2%/m light obscuration.
With the new high-power light source technology, a broad detection spectrum including all
standardized fires is achieved (see Defining the Response Sensitivity, page 34 ).

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LOGIC×SENS
The intelligent signal processing LOGIC·SENS distinguishes between deception variables and
fire events in order to prevent false alarms.
Reliable airflow monitoring
Analogous to point-type smoke detectors, which are monitored electronically for wire breaks
and short-circuits, highly sensitive and dependable airflow monitoring is required for smoke
aspiration systems. The airflow sensors used in the FAS-420-TM series reliably detect
malfunctions such as pipe breakage or obstructions in the air sampling openings.
Airflow monitoring is temperature-compensated and can be set depending on the air pressure.
Plug-and‑play
The plug-and‑play function makes the installation and commissioning of the aspirating smoke
detectors simple. The housing base is preinstalled on site. By preinstalling the detection
module for standard applications, the FAS-420-TM series Aspirating Smoke Detectors are
ready for operation as soon as they are inserted into the housing base.
Patented air sampling openings
The air sampling openings of the pipe system require clearly defined bore diameters that
depend on the planning and design. These precise air sampling openings are created using
patented aspiration reducing film sheets, marking tape, and clips, which not only permit easy
installation, but also prevent "whistling" noises. Another advantage is the quick and easy
detection and checking of the air sampling opening diameters.
Point-type detector projection
The system’s aspiration points can be equated with point-type smoke detectors. The
monitoring areas can therefore be planned in accordance with the applicable national
regulations.
Diagnostics
A system with FAS‑ASD‑DIAG Diagnostic Software, which enables quick and convenient error
containment, is available for maintenance and service. The current and stored (max. 72 hours)
unit status is read out to the diagnostic appliance via the unit's infrared port. The data is
transmitted from the diagnostic appliance to a laptop via a USB cable.
Selecting the fan voltage
The fan voltage can be increased for special planning from 9V to 12V via the fire panel's
programming software. In addition, the fan voltage can be increased up to 13.5V in intervals
of 1V via the FAS‑ASD‑DIAG Diagnostic Software. The increase in the fan voltage causes an
increase in the air transport speed and therefore reduces detection time.
Extensive pipe accessories
The extensive range of accessories enables the FAS-420-TM aspirating smoke detectors to be
used even in the most difficult conditions. Products from air filters and condensate separators
to blowing-out systems increase the service life in extremely dusty, damp and cold
environmental conditions.
3.2 Areas of Application
Thanks to their detection principle, FAS-420-TM aspirating smoke detectors represent an
extremely versatile fire protection solution.
Principle
Air samples are taken from the monitoring range by a pipe system with defined aspiration
borings and then fed to the detection module.

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This is especially well-suited for areas in which point-type detectors cannot be used or can
only be used under certain circumstances. These include:
– Areas that are difficult to access, in which point detectors are difficult to install and
maintain
– Air-conditioned areas
– Areas that require the earliest detection possible
– Areas with a height greater than that allowed for point detectors
– Areas in which point detectors are not desired for aesthetic reasons
– Areas in which strong electromagnetic fields occur
– Areas that are exposed to high or low temperatures
– Areas with contaminated air that require filter elements
– Areas that must be protected against vandalism.
Space protection
The FAS-420-TM series is suitable for monitoring areas such as
– Those with double floors, false ceilings
– Tunnels, ducts, barely accessible hollow spaces
– Storage, high-rise warehouses, elevator shafts
– Museums, cultural institutions
– Hotel rooms, hospital rooms, offices, prison cells, train compartments
– Freezer storage
FAS / FCS
1
2
TITANUSMICRO·SENS®
E
D
C
B
A
10
9
8
7
6
5
4
3
2
1
TITANUSMICRO·SENS®
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B
A
10
9
8
7
6
5
4
3
2
1
Principle of area monitoring with FAS-420-TM series Aspirating
Smoke Detectors
1 Room pipe system
2 Double-floor pipe system
Area monitoring with air-conditioning
Area monitoring occurs
– In rooms with air-conditioning for server rooms etc.
– In ventilation ducts
– In double floors, false ceilings
– In IT rooms, e-distributor rooms, transformer cells
– On air-conditioning units (see figure below) or
– In the bypass in air-conditioning ducts.

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FAS / FCS
FAS / FCS
FAS / FCS
1
2
Monitoring options for an air-conditioning unit or an air-
conditioning duct (depiction of principle)
1 Air-conditioning duct
2 Air-conditioning unit
The FAS-420-TM Aspirating Smoke Detector can be used for early fire detection in areas with
special-purpose air conditioning.
Thanks to its high sensitivity, expensive goods and equipment can be monitored reliably. The
aspirating smoke detectors from the FAS-420-TM series are therefore especially suitable for
areas of application:
– Where early intervention is essential due to a high value concentration
– Where equipment must always be operational
– Where highly sensitive detection is necessary (e.g. in areas where, due to built-in filter
elements, the air contains a low concentration of smoke particles)
– Where high air-exchange rates prevail.
Equipment protection
Equipment monitoring involves the direct monitoring of an object. These can be unventilated
or force-cooled units or cabinets, e.g.
– Distributor cabinets, switching cabinets
– Telephone-switching equipment
– Measuring, control, and regulation equipment.

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1
FAS / FCS
Principle of equipment monitoring with FAS-420-TM series
Aspirating Smoke Detectors
1 Clicking
3.3 System overview
The Smoke Aspiration Systems comprise a detection module, housing base and pipe system.
The most important components of the Smoke Aspiration System are the sensitive detection
module for detecting smoke aerosols and the aspiration unit with the built-in airflow sensor
for transporting the air samples and monitoring the pipe system for breakage and
obstructions. The pipe system comprises essentially pipe and fittings. The standard pipe
system is made from PVC or ABS. The pipes used for equipment monitoring should be
halogen-free.
Each air sampling opening in the pipe system represents a point detector in the planning.
Example of the signal process of the airflow sensor in case of
malfunctions
A Pipe System
FAS/FCS Aspiration Smoke detector
1 Smoke aspiration pipe
2 Air intake
3 Air sampling openings
4 Detection unit incl. airflow sensor
5 Housing Base
6 Aspiration unit
7 Air outlet
To guarantee reliable operation even under the most difficult conditions (clean rooms,
recycling area), there are numerous accessories available, such as air filters and water
separators (see Pipe system components, page 20 ).

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3.4 Functions
Air samples are taken from the area to be monitored via the aspiration unit. They are fed via a
pipe system with defined air sampling openings to the sensitive detection module.
Detection
Depending on the response sensitivity of the detection module in use and the alarm threshold
programmed, the FAS-420-TM aspirating smoke detector triggers the alarm when the
corresponding air obscuration threshold is reached. The alarm is displayed via the internal
alarm or main alarm LED on the device and forwarded to a connected fire panel.
Various delay times can be set for the alarm thresholds, as well as for displaying and
transferring malfunctions (see Parameter Settings via Programming Software, page 63 ).
Alarm messages are saved and are reset after the cause has been eliminated.
LOGIC×SENS
The LOGIC·SENS intelligent signal processing compares the measured smoke level with
known disturbance variables and decides whether something is an alarm or deception. LOGIC
SENS can be activated or deactivated using the fire panel's programming software.
Fire source identification
Fire source identification is possible if an I pipe is planned for a maximum of five areas or
devices. The procedure can be divided into four phases ( Fire source identification, page 12
to Fire source identification, page 12 ).
–Phase 1
In its general operating state, the FAS-420-TM Aspirating Smoke Detector extracts air
samples from the monitoring range and analyzes these for the presence of smoke
particles.
E
D
C
B
A
10
9
8
7
6
5
4
3
2
1
FAS-420-TMseries
Figure3.1: Phase 1: Normal operation
–Phase 2
As soon as the system has switched to alarm state as a result of a rise in the
concentration of smoke particles typical of a fire, the alarm is signaled.

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E
D
C
B
A
10
9
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1
FAS-420-TMseries
E
D
C
B
A
10
9
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6
5
4
3
2
1
Figure3.2: Phase 2: Early fire detection
–Phase 3
When the alarm is signaled, once the configurable internal alarm threshold is reached, the
aspiration fan switches off and a second fan blows all smoke particles out of the pipe
system in the opposite direction.
E
D
C
B
A
10
9
8
7
6
5
4
3
2
1
FAS-420-TMseries
Figure3.3: Phase 3: Blowing out
–Phase 4
Once the pipe system has been blown out, the direction of flow is reversed again and the
time required for the smoke particles to penetrate into the detection module is
measured. On the basis of this time, the location of the smoke source can be accurately
traced to one of the monitored areas.

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E
D
C
B
A
10
9
8
7
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4
3
2
1
FAS-420-TM series
E
D
C
B
A
10
9
8
7
6
5
4
3
2
1
Figure3.4: Phase 4: Identification of fire source by reversing the fan's direction of flow
Once the fire source has been identified, it is displayed via a corresponding display on the
FAS-420-TM and on the operating and display unit of the fire panel.
Detection
Depending on the response sensitivity set on the detection module (0.5%/m to 2%/m light
obscuration), the FAS‑420‑TM‑R/‑RVB triggers the main alarm when the appropriate light
obscuration is reached. The sensitivities can also be set at intervals of 0.1%/m using the
FAS‑ASD‑DIAG Diagnostic Software. The alarm is displayed via the alarm display on the unit
and forwarded to the fire panel connected. The alarm thresholds and the display and
transmission of malfunctions can be allocated different delay times. The intelligent
LOGIC·SENS signal processing hides misleading values that are similar to those shown in the
event of a fire, and ensures a high level of security against false alarms.
Alternative sensitivity
The LSN improved fire panel allows the sensitivity set on the detection module to be changed
if necessary. Changes to the sensitivity of the detector module can be made in the following
intervals: 2.0 / 1.0 or 0.5%/m light obscuration.
Changing the detector module's sensitivity setting allows you to adjust smoke detection to
process-specific disturbance values, such as those caused by
– an increase in the aerosol or contamination levels in the monitoring range due to the time
of day (day/night mode)
– an increase in the aerosol or contamination levels in the monitoring range due to the
operation currently in progress (e.g. installation work, welding or increased generation of
water vapor, exhaust fumes and dust
etc.).
Monitoring unit
The detection module is monitored for contamination and for signal malfunction. A
malfunction is displayed on the unit and forwarded to the fire panel. Malfunctions caused by
brief environmental fluctuations can be eliminated with a time-delayed setting.
Airflow Monitoring
An airflow sensor checks the connected pipe system for breakage and obstruction.

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The airflow sensor can – depending on the configuration of the pipe system (see Principles of
pipe planning, page 31 ) and the setting of the airflow sensors - detect an obstruction of a
single air sampling opening. Airflow monitoring is temperature-compensated and can be set
depending on the air pressure.
On expiry of a defined delay, the malfunction is displayed on the aspirating smoke detector
and the message is transmitted to the fire panel. The monitoring window thresholds can be
modified to suit the environmental conditions (see Airflow Monitoring, page 33 ).
The principal signal curve of the airflow sensor is indicated in Airflow Monitoring.
S
t
4
7
8
6
1
2
5
3
Example of the signal process of the Airflow sensor in case of
malfunctions
S Airflow sensor signal
t Time
1 Normal airflow
2 Airflow too weak
3 Airflow too strong
4 Breakage
5 Obstruction
6 Monitoring window
7 Delay
8 Malfunction message
Resetting via fire panel
A malfunction message is reset via the connected fire panel. Alarm and malfunction messages
are displayed simultaneously on the unit via the Local SecurityNetwork LSN using the reset
function on the detector line.
Calibrating the airflow sensor
The airflow sensor calibration of the FAS-420-TM Aspirating Smoke Detector is performed
automatically when the detection module is inserted into the housing base, provided that the
X4 jumper has been plugged into another socket first. This plug-and-play feature makes the
FAS-420-TM considerably easier to commission. In addition, the calibration can also be
performed using the FAS‑ASD‑DIAG Diagnostic Software. The initialization phase is therefore
carried out according to or independently of the air pressure as desired.
Pipe system
A pipe system with an overall length of up to 50m can be connected to FAS-420-TM series
Aspirating Smoke Detectors over a maximum of 12 aspiration points. A maximum of 5
aspiration points can be connected with ROOM·IDENT.

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3.5 FAS‑420‑TM Aspiration smoke detector series and accessories
3.5.1 Overview
1
2
3
A
B C
FAS-420-TM series
Overview of FAS-420-TM series aspirating
smoke detectors and accessories
1 Pipe system
2 Connections to fire panel/power
supply
3 Air-return Pipe
A FAS‑ASD‑DIAG Diagnostic Software
with connection cable
B Cable entries (2xM20, 1xM25)
C Test pipe
FAS-420-TM Aspiration smoke detector series comprise the following components:
Housing base
– Connections for pipe with 25mm external diameter (input and return)
– Pack with cable entries, 1 x M25 (for cable diameter of 1-18mm) and 2 x M20 (for cable
diameter of 1-13mm)
– Screw terminals for securing cables with a thickness of up to 2.5mm²
Detector module
– Sensitive detection with the latest technology according to the principle of an optical
scattered-light smoke detector with integrated airflow monitoring
– Aspiration unit with optimized air routing
– PC board with LSN connections, connection for shield wire and DIP switch for address
setting
– Infrared diagnostics port
– FAS-420-TM: optical displays for main alarm, malfunction and operation
– FAS‑420‑TM‑R: optical displays for fire source identification, main alarm, malfunction and
operation
– FAS‑420‑TM‑RVB: optical displays for fire source identification, internal alarm and main
alarm, malfunction and operation, smoke level display
Information on other accessories for special applications can be found in
– FAS‑ASD‑DIAG Diagnostic Software, page 19
– Ceiling lead-through, page 22

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– Water Separator for Humid Areas, page 24
3.5.2 Connections
E
D
C
B
A
FAS-420-TM series
I
IV II
III
FAS-420-TM series
I
IV II
III
VI
E
D
C
B
A
10
9
8
7
6
5
4
3
2
1
FAS-420-TM series
I
V
II
III
IV
TM
TM-R
TM-RVB
V
VII
FAS-420-TM series
FAS-420-TM series
2
1
3
3
4
4
4
4
4
44
4
FAS | FCS
Figure3.5: FAS-420-TM connections
Refer to the tables below for explanations on the connections and for explanations on the
LEDs.
FAS-420-TM
series
Position Function Explanation
1 Connection for aspiration pipe For ∅ 25mm pipe
system
2 Connection for air-return pipe For ∅ 25mm pipe
system
3 Cable bushing for connection of fire panel
and additional power supply (input/
output)
2 x M25
4 Cable bushing for connection of fire panel
and additional power supply (input/
output)
8 x M20

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Notice!
When using fire source identification, it is not permitted to connect an air-return pipe.
3.5.3 FAS‑420‑TM LEDs
FAS-420-TM Position LED Color Explanation
I Operation Green Operation
II Main alarm Red Main alarm
III Malfunction Yellow Malfunction
– in the pipe system
– in the detection module
– caused by fan failure
IV Infrared port Fault diagnosis
3.5.4 FAS‑420‑TM‑R LEDs
FAS-420-TM-R Position LED Color Explanation
I Operation Green Operation
II Main alarm Red Main alarm
III Malfunction Yellow Malfunction
– in the pipe system
– in the detection module
– caused by fan failure
IV Fire source
identification for zones
A-E
5 red LEDs Fire source identification
V Infrared port Fault diagnosis
3.5.5 FAS‑420‑TM‑RVB LEDs
FAS-420-TM-RVB Position LED Color Explanation
I Operation Green Operation
II Main alarm Red 100% smoke level
III Internal alarm Red 60% smoke level
IV Malfunction Yellow Malfunction
– in the pipe system
– in the detection module
– caused by fan failure
V Smoke level display 1
to 10
10
yellow
LEDs
Current smoke level

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VI Fire source
identification for
zones A-E
5 red
LEDs
Fire source identification
VII Infrared port Fault diagnosis
3.5.6 FAS‑ASD‑DIAG Diagnostic Software
FAS-
DIAG
Figure3.6: Diagnostic software for importing and reading out the device data
The FAS‑ASD‑DIAG Diagnostic Software enables the saved and current statuses of the
FAS-420-TM and error messages to be saved on a PC or laptop.
Data is transmitted to the diagnostic appliance via the infrared port of the aspirating smoke
detector. The USB cable provided is used to transmit the data from the diagnostic appliance
to the PC/laptop (see figure above).
Diagnostic messages remain saved in the FAS-420-TM for at least 3 days in order to be able to
evaluate even short, sporadically occurring errors (e.g. in case of changed operating
conditions). Resetting the FAS-420-TM via the diagnostic software deletes all saved diagnostic
messages. The software also allows the deletion of error messages.
Notice!
The diagnostic software can be used to save in file format all stored and current diagnostics
data and any settings made via the fire panel programming software. To be able to compare
the data read out, save each file under a different file name.
3.5.7 Remote Indicators
A remote indicator must be connected if the aspirating smoke detector is not directly visible
or has been mounted in false ceilings or floors.
The external detector alarm display is installed in an obvious place in halls or entrances of the
building section or areas concerned.
FNS‑420‑R LSN Strobes can be used as remote indicators. These must be ordered separately.
The FNS‑420‑R LSN strobes can be addressed and are connected to the LSN bus.
If the FAS‑420‑TM‑R and FAS‑420‑TM‑RVB device variants with fire source identification are
used, the FNS‑420‑R LSN Strobes can be assigned to the various monitoring ranges and, in the
event of a fire, the location of the fire can be identified.

20 en | Technical specifications Aspiration smoke detector LSN improved
2020.04 | 5.1 | F.01U.088.878 Operation guide Bosch Sicherheitssysteme GmbH
3.6 Pipe system components
3.6.1 Overview
FAS-420-TM series
A
A
A
4
5
3
2
7
6
8
9
10
11
12
13
1
14
A
B
Pipe system components
A Pipe system connection
B Smoke aspiration pipe
1 Connection for test
adapter
2 T-fitting
3 Air filter
4 Water separator
5 Detonation safety barrier
(not permitted for
EN54‑20 or ISO
7240-20)
6 90° pipe bend
7 Aspiration hose for
ceiling lead-through
8 Ceiling Lead-through
9 Fitting
10 Double threaded joint
11 90° pipe elbow
12 45° pipe elbow
13 Aspiration reduction
14 End cap
During planning/design, a distinction is drawn between area monitoring and equipment
monitoring. For both applications, PVC pipes and halogen-free pipes can be used but the
restrictions of EN 54.20 must be observed. The pipes used for equipment monitoring should
be halogen-free.
The figure shows essential accessory components that can be selected for the application
concerned.
The pipe system must be constructed using pipes with an external diameter of 25 mm and the
associated fittings.
Blowing-out system
In areas that are susceptible to dust particles or icing, it may be necessary to blow out the
aspiration pipe system and its air sampling openings. The figure below shows a manual
blowing-out system with a three-way tap.