Bosch FCS‑320‑TP1, FCS‑320‑TP2 Operation Manuals

Aspirating Smoke Detector

FCS‑320‑TP1 | FCS‑320‑TP2

en

Operation Guide

Aspirating Smoke Detector Table of contents | en 3

Bosch Sicherheitssysteme GmbH Operation Guide 2018.04 | 2.0 | F.01U.130.926

Table of contents

1

Safety 6

2

General 7

2.1 Introduction 7

2.2 Warranty 7

2.3 Copyright 7

2.4 Disposal 7

3

Technical Specifications 8

3.1 Product Description 8

3.2 Areas of application 9

3.3 System Overview 12

3.4 Functions 12

3.5 FCS-320 Series Aspirating Smoke Detectors and Accessories 14

3.5.1 Overview 14

3.5.2 FCS-320 series connections 15

3.5.3 FCS-320-TP1/FCS-320-TP2 displays 16

3.5.4 FCS-320-TT1/FCS-320-TT2 displays 17

3.5.5 FAS-ASD-DIAG Diagnostic Software 18

3.5.6 Remote indictors 18

3.5.7 Device mounting 19

3.5.8 Measures for Reducing Operating Noise 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 Adapter 22

3.6.4 Air-Return Pipe for Pressure Areas and Atmospheric Loads 23

3.6.5 Air filters for dusty areas 24

3.6.6 Water Separator for Humid Areas 24

3.6.7 Detonation Safety Barrier for Potentially Explosive Areas 25

3.7 Scope of Delivery: Smoke Aspiration System 26

3.8 Technical data 28

3.8.1 FCS-320 Series Aspirating Smoke Detectors 28

3.8.2 Pipe System 29

3.8.3 Smoke Aspiration System Components 29

4

Planning 32

4.1 Regulations 32

4.2 Principles of Pipe Planning 33

4.3 Airflow monitoring 36

4.4 Defining the Response Sensitivity 37

4.5 Planning Limits 38

4.6 Standard Pipe Planning 39

4.6.1 Determining the Necessary Accessories 39

4.6.2 Pipe Planning with Pipe Accessories 39

4.7 Pipe Planning for Single-Hole Monitoring 49

4.8 Simplified Pipe Planning 55

4.9 Planning for Long Pipe Feed Lines 58

4.10 Planning with Acceleration Openings 59

4.11 Planning for Forced Airflow 69

4.12 Project planning with branch pipes 72

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2018.04 | 2.0 | F.01U.130.926 Operation Guide Bosch Sicherheitssysteme GmbH

4.13 Planning with air sampling hose 74

4.14 Planning with air return 75

4.15 Power Supply 76

5

Installing the Aspirating Smoke Detector 78

5.1 General 78

5.2 Installing the Detector Module 78

5.3 Settings on the Unit Motherboard 79

5.3.1 Setting the Fan Voltage 79

5.3.2 Number of Detector Modules 80

5.4 Installing the Unit 80

5.5 Installing the Reset Board 83

5.5.1 Installing the reset board 83

5.5.2 Installing the reset board 84

5.5.3 Electrical connection of the reset board 85

5.6 Connection to the Fire Panel 85

5.6.1 Electrical Connection 85

5.6.2 FCS-320-TP1 / FCS-320-TT1 Connection to the Fire Panel 87

5.6.3 FCS-320-TP2 / FCS-320-TT2 Connection to the Fire Panel 87

5.7 DIP switch settings 87

5.8 Connecting an External Detector Alarm Display 89

5.9 Data Logging 89

5.10 Replacing a Detector Module 89

6

Installation of the Pipe System 91

6.1 Length Change of the Pipe System 92

6.2 Air Sampling Openings 93

6.3 Ceiling Lead-through 95

6.4 Monitoring with Forced Airflow 95

6.4.1 Detection at Intake and Exhaust Openings 95

6.4.2 Detection in the Bypass 96

6.5 Air Filter 97

6.5.1 Installing the Air Filter Box 97

6.5.2 Filter Change on the Air Filter Box 97

6.6 Air-return Pipe 98

6.7 Three-way Tap 99

6.8 FAS‑ASD‑WS Water Separator 100

6.9 Detonation Safety Barrier 101

6.10 Test Adapter 101

7

Commissioning 103

7.1 Preparation 103

7.2 Calibrating the Airflow Sensor 104

7.2.1 Air-Pressure-Independent Calibration 104

7.2.2 Air-Pressure-Dependent Calibration 105

7.3 Testing the Detector Module and Alarm Transfer 105

7.4 Checking Malfunction Transmission 106

7.5 Checking Airflow Monitoring 106

7.6 FCS-320 Functional Test 107

7.6.1 Preparations for the Functional Test 107

7.6.2 Conducting the Functional Test 108

8

Maintenance 110

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Bosch Sicherheitssysteme GmbH Operation Guide 2018.04 | 2.0 | F.01U.130.926

8.1 Visual check 110

8.2 Flash Code Table 110

8.2.1 1 Flash - Error: Internal Voltage Monitoring 1 110

8.2.2 2 Flashes - Error: Internal Voltage Monitoring 2 111

8.2.3 3 Flashes - Error: Fan Voltage Monitoring 111

8.2.4 4 Flashes - Error: Air Pressure Correction Voltage Monitoring 112

8.2.5 5 Flashes - Error: Programming Error 113

8.2.6 6 Flashes or 7 Flashes - Error: Internal Error 1 or Internal Error 2 113

8.2.7 8 Flashes: Unit Initialization 113

8.3 Detector Module and Alarm Transmission 113

8.4 Pipe system 114

8.5 Checking the Airflow Sensor Calibration 114

8.6 Airflow Monitoring 116

8.7 Malfunction Transmission 116

8.8 Maintenance Intervals 116

9

Appendix 118

9.1 Air Pressure Correction Tables for Airflow Sensor Calibration 118

9.1.1 Equipment protection 118

9.1.2 Space Protection (I-pipe System) 119

9.1.3 Space Protection (U, Double U, and H-pipe System) 121

9.2 Planning without filter 123

9.2.1 Without any other pipe accessories 123

9.2.2 With water separator 124

9.2.3 With detonation safety barrier 124

9.3 Planning with air filter 125

9.3.1 Without any other pipe accessories 126

9.3.2 With water separator 126

9.3.3 With detonation safety barrier 127

9.4 Test Log FCS-320 Series Aspirating Smoke Detectors 127

Index 130

6 en | Safety Aspirating Smoke Detector

2018.04 | 2.0 | F.01U.130.926 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.

Aspirating Smoke Detector General | en 7

Bosch Sicherheitssysteme GmbH Operation Guide 2018.04 | 2.0 | F.01U.130.926

2 General

2.1 Introduction

This operation guide describes the smoke aspiration systems featuring FCS-320 series
aspirating smoke detectors and the associated aspiration pipe system.
The FCS-320 designation in this operation guide refers to all FCS-320 versions (FCS-320‑TP1,
FCS-320‑TP2, FCS-320‑TT1 und FCS-320‑TT2). Specific references are made to differences
between the individual versions.
The "FAS/FCS" designation in the illustrations and graphics also refers to all models in the
FCS-320 series (FCS‑320‑TP1, FCS‑320‑TP2, FCS‑320‑TT1, FCS‑320‑TT2), and also applies to
LSN models of aspirating smoke detectors.
This operation guide describes the smoke aspiration systems featuring FCS-320 series
Aspirating Smoke Detectors and the associated aspiration pipe system.
The FCS-320 designation in this operation guide refers to all FCS-320 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.
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).

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2018.04 | 2.0 | F.01U.130.926 Operation Guide Bosch Sicherheitssysteme GmbH

3 Technical Specifications

3.1 Product Description

Aspirating smoke detectors from the FCS-320 series are active fire detection devices that are
connected directly to conventional lines for early smoke and fire detection. They are used for
room and equipment protection as well as for monitoring air-conditioning units or ducts.

Variants

The FCS-320‑TP1 and FCS-320‑TP2 models feature LED displays indicating operating mode,
malfunction and alarm (the FCS-320‑TP2 has two alarm displays). The FCS-320‑TT1 and
FCS-320‑TT2 models offer differentiated alarm displays (info, pre and main alarm) as well as a
10-level smoke display (on the FCS-320‑TT2, all alarm and smoke level displays are doubled).
The FCS-320‑TP1 and FCS-320‑TT1 variants are each fitted with a detector module.
Both FCS-320‑TP2 and FCS-320‑TT2 have two integrated detector modules each. Two
aspiration pipes can be connected, enabling two areas to be monitored. This effectively
doubles the monitoring area.

Dual-detector dependency

The use of two detector modules in variants FCS-320-TP2 and FCS-320-TT2 also enables a
dual-detector dependency to be realized. This means that one area can be monitored by two
pipe systems.

Two alarm stages

Alternatively, the FCS-320-TP2 and FCS-320-TT2 can have two alarm stages configured. A pipe
system is connected via a pipe adapter on two detector modules. Selecting different response
sensitivities for the detector modules enables the time-staggered triggering of two main
alarms.

Sensitivity

Three detector module versions are available for the FCS-320 aspirating smoke detector
series:
– DM‑TP‑50(80) with a response sensitivity of up to 0.5%/m (0.8%/m) light obscuration
– DM‑TP‑10(25) with a response sensitivity of up to 0.1%/m (0.25%/m) light obscuration
– DM‑TP‑01(05) with a response sensitivity of up to 0.015%/m (0.05%/m) light obscuration.
Depending on the detector module used, the FCS-320‑TT1 and FCS-320‑TT2 models can
achieve a resolution ten times higher for displaying up to 0.05%/m (0.08%/m), 0.01%/m
(0.025%/m) or 0.0015%/m (0.005%/m) light obscuration.

Notice!

The sensitivity value is based on measurements with standard test fires (old value in
brackets).

The new High-Power-Light-Source technology permits a broad detection spectrum over all
standardized fires.

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 FCS-320 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.

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Bosch Sicherheitssysteme GmbH Operation Guide 2018.04 | 2.0 | F.01U.130.926

The small airflow unit also contains a dynamic airflow sensor that enables a response to small
and fast changes in the airflow.

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

There is a system available with the FAS-ASD-DIAGdiagnostic software that enables quick and
convenient error containment for maintenance and service. The current and stored unit status
is read out via cable data transmission to the PC.

Selecting the fan voltage

The fan voltage for special planning can be increased from 6.9V to 9V by relocating the fan
jumper. This increases the air transport speed and therefore reduces detection time.

3.2 Areas of application

Thanks to their detection principle, FCS-320 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.
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 FCS-320 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

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2018.04 | 2.0 | F.01U.130.926 Operation Guide Bosch Sicherheitssysteme GmbH

FAS / FCS

1

2

TITANUS MICRO·SENS ®

E

D

C

B

A

10
9
8
7
6
5
4
3
2
1

TITANUS MICRO·SENS ®

E

D

C

B

A

10
9
8
7
6
5
4
3
2
1

Principle of area monitoring with FCS-320 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.

FAS / FCS

FAS / FCS

FAS / FCS

1

2

Monitoring options for an air-conditioning unit or an air­conditioning duct (depiction of principle)

1 Air-conditioning duct

2 Air-conditioning unit

The FCS-320 Aspirating Smoke Detector can be used for early fire detection in areas with
special-purpose air conditioning.

Aspirating Smoke Detector Technical Specifications | en 11

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Thanks to its high sensitivity, expensive goods and equipment can be monitored reliably. The
aspirating smoke detectors from the FCS-320 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.

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.

FAS / FCS

FAS / FCS

FAS / FCS

1

2

Monitoring options for an air-conditioning unit or an air­conditioning duct (depiction of principle)

1 Air-conditioning duct

2 Air-conditioning unit

The FCS-320 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 FCS-320 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

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– 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.

3.3 System Overview

The smoke aspiration systems comprise an aspirating detector and pipe system.
The aspirating smoke detector comprises the detector module for detecting the smoke
aerosols, the aspiration unit for transporting the air samples to the detector module and the
airflow sensor for 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.

2

7

6

5

3

1

A

4

Overview of the aspirating smoke detector

A Pipe system

FCS-320 Aspirating smoke

detector

1 Smoke aspiration pipe

2 Air intake

3 Air sampling openings

4 Detector module

including airflow
monitoring

5 Housing

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, water separators
and detonation safety barriers.

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.

Detector module

Depending on the response sensitivity of the detector module in use and programmed alarm
threshold, the FCS-320 series aspirating smoke detector triggers the alarm when the
corresponding light obscuration threshold is reached. With the FCS-320‑TP1 and the
FCS-320‑TP2, the alarm is displayed via the alarm LED and/or two alarm LEDs on the unit and
transmitted to a connected fire panel. The FCS-320‑TT1 and FCS-320‑TT2 versions offer
differentiated LED displays for info, pre and main alarm. Pre and main alarms are transmitted
to the fire panel (with FPA‑5000 Rel 2.1; additionally with info alarm from Rel 2.5 or above).
Various delay times can be programmed for the alarm thresholds, as well as for displaying and
transferring malfunctions. Alarm messages are saved and are reset after the cause has been
eliminated.
LOGIC·SENS

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Bosch Sicherheitssysteme GmbH Operation Guide 2018.04 | 2.0 | F.01U.130.926

The LOGIC·SENS intelligent signal processing compares the measured smoke level with
known disturbance variables and decides between alarm and deception.

Detector module monitoring

Each detector module is monitored for contamination, signal malfunction and removal. Soiling
of the detector module has no effect on its sensitivity. With all variants, any malfunction is
displayed via the malfunction LED and transferred 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.
The airflow sensor can – depending on the configuration of the pipe system – detect at least a
50% obstruction to a complete obstruction of the air sampling openings and a breakage in the
pipe system that results in a 50% loss from the air sampling openings. Should the fan fail, the
airflow in the pipe system is interrupted and this causes a blockage message. 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).
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

Fault Indication

An imminent detector module or airflow malfunction generates a malfunction message that is
displayed on the FCS-320.

Flash code for malfunction detection

Malfunctions and certain device statues are displayed using various LED flash codes on the
detector module's electronics PCB. Thus it is possible to differentiate quickly among
malfunctions that can be caused by a defective detector module, an obstruction, or a break in
the pipe system.

Resetting via fire panel

A malfunction message is reset via the connected fire panel. The panel resets alarm and
malfunction messages on the unit while simultaneously resetting the detector line via the
reset board.

Calibrating the airflow sensor

Automatic airflow sensor calibration makes it significantly easier to start the FCS-320. The
initialization phase is carried out according to or independently of the air pressure as desired.

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To set the FCS-320 to the airflow typical for the pipe network, an airflow initialization (flow­init) procedure is carried out. This must be done for each unit once at the start after
installation, each time the pipe system is replanned/redesigned and after changing the fan
voltage. This enables the unit to determine and save the airflow typical for the pipe network.

Pipe System

A pipe system with an overall length of up to 300m can be connected to FCS-320 series
aspirating smoke detectors over a maximum of 32 aspiration points. Two pipe systems can be
connected to both the FCS-320‑TP2 and FCS-320‑TT2 variants. The entire pipe system then
has a total length of 2 x 280m and a maximum number of 2 x 32 aspiration points.

3.5 FCS-320 Series Aspirating Smoke Detectors and Accessories

3.5.1 Overview

2

A

3

C

E

G

F

1

B

D

FAS / FCS

Overview of FCS-320 series aspirating
smoke detectors and accessories

1 Pipe system(s)

2 Connections to fire panel/power supply

3 Air-return pipe

A Vibration absorber (sold separately)

B MT-1 unit mounting

C Detector module

D DIAG Diagnostic Software with connection

cable

E Cable bushings (1xM20, 2xM25)

F Test pipe

G Test adapter

FCS-320 series aspirating smoke detectors comprise the following components:
– Plastic housing
– Plastic connection pieces
– Integrated air-return pipe
– Connection for pipe with 25mm external diameter
– Aspiration unit with optimized air supply
– Motherboard with interface for diagnostics system, LSN connections, connection for

shield wire, as well as DIP switch for address setting
– Supplementary package with cable bushings (1xM20, 2xM25)
– FCS-320-TP1 /FCS-320-TP2: optical displays for alarm, malfunction and operation
– FCS-320-TT1 /FCS-320-TT2: smoke level display(s), optical displays for info, pre and main

alarm, malfunction and operation
– 1 detector module (for FCS-320-TP1 and FCS-320-TT1) and/or 2 detector modules (for

FCS-320-TP2 and FCS-320-TT2).

Aspirating Smoke Detector Technical Specifications | en 15

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Notice!

Only DM-TP-50(80), DM‑TP‑10(25) and DM-TP-01(05) detector modules certified to VdS may
be used in the FCS-320 series. The detector modules must be ordered separately.

See also

– FAS-ASD-DIAG Diagnostic Software, page 18
– Remote indictors, page 18
– Device mounting, page 19
– Ceiling Lead-through Adapter, page 22
– Water Separator for Humid Areas, page 24
– Detonation Safety Barrier for Potentially Explosive Areas, page 25

3.5.2 FCS-320 series connections

1

2

3

1

4

5

FAS-420 series

FAS-420 series

FAS / FCS

Figure3.1: FCS-320 connections (see table on next page for explanations)

Position in

figure

Function Explanation

FCS-320 series 1 Cable bushing for connection of fire panel

and additional power supply (input/
output)

1 x M20, for cable diameters of
8-12mm

2 Pipe system 1 connection For Ø 25mm pipe system

3 Pipe system 2 connection

(for FCS-320-TP2 and FCS-320-TT2 only)

For Ø 25mm pipe system

4 Connection for air-return pipe

5 Cable bushing for connection of fire panel

and additional power supply (input/
output)

2 x M25 for cable diameters of
9-14mm (expandable to 14­18mm)

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3.5.3 FCS-320-TP1/FCS-320-TP2 displays

FAS-420-TP1 / FCS-320-TP1

FAS-420-TP2 / FCS-320-TP2

1

2

Figure3.2: FAS‑420‑TP1/TP2, FCS‑320‑TP1/TP2 displays

FCS-320-TP Display LED Explanation

Operation Green Operation display

Alarm

1

Red Alarm indication

Fault Yellow Fault

– in the pipe system
– of a detector module
– caused by fan failure

1

Two alarm displays on the FCS-320-TP2

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3.5.4 FCS-320-TT1/FCS-320-TT2 displays

i

1

2

3

4

5

6

7

8

9

10

FAS-420-TT1 / FCS-320-TT1

FAS-420-TT2 / FCS-320-TT2

i

1

2

3

4

5

6

7

8

9

10

1

2

3

4

5

6

7

8

9

10

12

Figure3.3: FAS‑420‑TT1/TT2, FCS-320-TT1/TT2 displays

FCS-320‑TT Display LED

1

Explanation

Operation Green Operation display

Fault Yellow Fault

– in the pipe system
– of a detector module
– caused by fan failure

Main alarm Red 100% smoke level

Pre-alarm

1

Red 66% smoke level

Info alarm

1

Red 33% smoke level

Smoke level display 1 to 10

1

10 yellow LEDs Current smoke level

1

All displays doubled on the FCS-320-TT2

18 en | Technical Specifications Aspirating Smoke Detector

2018.04 | 2.0 | F.01U.130.926 Operation Guide Bosch Sicherheitssysteme GmbH

3.5.5 FAS-ASD-DIAG Diagnostic Software

DIAG

Figure3.4: Diagnostic software for reading out unit status

The diagnostic software enables the saved and the current unit status, as well as the error
messages to be displayed on the PC or laptop.
The supplied diagnostics cable connects the aspirating smoke detector ("DIAG" connection on
the motherboard) to the PC. The FAS-ASD-DIAG version is connected to the PC via a USB port,
earlier DIAG versions via a COM port.
Diagnostic messages remain saved in the unit 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 device 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 the stored and current
diagnostic data as well as any settings made. To be able to compare the data read out, save
each file under a different file name.

3.5.6 Remote indictors

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.

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3.5.7 Device mounting

1

2

FAS

-420 series

FAS-420

series

Mounting for FCS-320 series Aspirating Smoke Detector

1 Horizontal installation

2 Vertical installation

The MT-1 unit mounting is used if a direct wall installation is not possible, e.g. installation on
racks.

3.5.8 Measures for Reducing Operating Noise

1

1

2

3

4

FAS-420 series

Absorption of the operating noises caused by airflows

1 Smoke aspiration pipe

2 Flexible hose

3 Fitting

4 Vibration absorbers

Vibration absorbers

The fans of the aspirating smoke detectors cause a noise level of approx.45dB(A). Mounting
the FCS-320 onto vibration absorbers can effectively reduce noise transmission through the
installation elements. This results in a reduction in the noise level from 1to 2dB(A).
Additional operating noises may be caused by vibrations on the pipe system, which are
generated by the air flowing through it. This can be remedied by inserting a corrugated hose
(approx.15cm long) between pipe system and aspirating smoke detector to create a flexible
transition.
In noise-sensitive areas, the sound level can also be reduced by installing a piece of plastic
pipe approximately 100mm long into the air outlet opening of the unit. This is done by
breaking out the pre-punched opening in the protective grille (e.g. using a small edge cutter).

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3.6 Pipe system components

3.6.1 Overview

FAS-420-TM

ser

ies

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.
If the maximum permissible pipe lengths are used, then for the pipe returns, pipes with an
exterior diameter of 40mm and the appropriate fittings must be used.

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.

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FAS-420-TM series

A

1

2

B

Components of manual blowing-out systems

A Blast air supply connection

B Pipe system connection

1 Three-way tap

2 25mm aspiration pipe

Aspiration reducing clips

3.6.2 Air sampling openings

Aspiration reducing film sheets

An air sampling opening is a 10mm bore in the aspiration pipe that is covered with a patented
aspiration reducing film sheet with the required opening diameter. The size of the opening
depends on the structure of the pipe system (see Planning).
The aspiration reducing film sheet is secured with marking tape to prevent it from becoming
displaced. The marking tape is a transparent sticky film with red edges and a 10 mm hole. It is
placed over the aspiration reducing film sheet so that the air sampling opening is not
concealed and can be seen from long distances.

1

3

36

2

4

4

45

2

Air sampling opening with aspiration reducing film sheet and
marking tape

1 Smoke aspiration pipe

2 Air sampling opening

with aspiration reducing
film sheet

3 Marking tape for

aspiration reducing film
sheet

4 Air sampling opening

5 Fire red (RAL3000)

6 Transparent

Aspiration reducing clips

In areas susceptible to obstructions or icing, special, patented ASD aspiration clips with
flexible aspiration reductions are used (see figure below).

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1

2

Aspiration reduction for soiled areas and deep-freeze areas

1 Aspiration reduction for

deep-freeze facilities

2 ASD aspiration clip made of

plastic

During use in deep-freeze areas, the flexible aspiration reduction expands in the air sampling
openings and pushes the ice away during blowing out. The special plastic clip ensures that the
aspiration reduction remains at the defined location.
As the clips are more stable under pressure and the elastic rubber insert significantly
improves the cleaning effect, they are used for all plans and designs which require a blow-off
system due to environmental influences (e.g. increased exposure to dust).

Notice!

The standard AF-x aspiration reducing film sheets and the marking tapes are not suitable for
use in low-temperature areas.

The aspiration reductions with plastic clips are available separately.

3.6.3 Ceiling Lead-through Adapter

1

2

3

4

6

7

8

9

5

Ceiling lead-throughs

1 Ceiling

2 T-fitting

3 Pipe system

4 Complete ceiling lead-

through

5 Aspiration hose for ceiling

lead-through

6 False ceiling

7 Knurled nut

8 Aspiration reducing film

sheet

9 Aspiration

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A concealed pipe system for area monitoring can be realized by installing in a false ceiling.
This requires the use of ceiling lead-throughs in the false ceiling. The ceiling lead-through can
be used with a false ceiling thickness of up to approx. 35mm.According to the planning and
design guidelines, the ceiling lead-throughs are fitted with aspiration reducing film sheets with
defined air sampling openings and connected to the pipe system by means of aspiration
hoses.
If these hoses exceed a maximum of 1m in length, the plan according to Section3Planning
applies. If structural circumstances dictate that lengths in excess of 1m are used, the pipe
system has to be calculated accordingly.

3.6.4 Air-Return Pipe for Pressure Areas and Atmospheric Loads

P1

P2

5

1

FAS / FCS

2

3

4

Principle of air return

P1/P2 Pressure areas 1 and 2

1 Detector module

2 Airflow sensor

3 Aspiration unit

4 Air-return pipe

5 Pipe system

If the aspirating smoke detectors and the pipe system are installed in areas with varying air
pressure, the aspirated air must be returned to the pressure area of the pipe system. The air­return pipe can serve to equalize pressure or to prevent atmospheric loads (e.g. odors) in
neighboring spaces.

1

2

FAS-420 series

FCS-320 with air-return pipe

1 Smoke aspiration pipe

2 Air-return pipe

The air-return pipe is connected to the air exhaust duct inside the FCS-320 through the
ventilation grille. This requires the pre-punched opening in the protective grille to be broken
out.

!

Caution!

The air-return pipe of the smoke aspiration system should not exceed 2m. Longer returns
must be checked individually.

24 en | Technical Specifications Aspirating Smoke Detector

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3.6.5 Air filters for dusty areas

In areas with interference to the environment such as, e.g. dust, an air filter is to be used to
protect the smoke detection system. The standard air filter used is the type FAS-ASD-FL,
consisting of a plastic housing with two pipe connections. If the air filters are dirty, then the
filter inserts must be changed by opening the filter housing.
In order to extend the maintenance intervals, one air filter can be installed in every output
pipe instead of one air filter inside the main sampling pipe. The same design specifications
shall apply as stated in the projection tables in the appendix.

FAS-ASD-FLFAS-ASD-FLFAS-ASD-FLFAS-ASD-FL

FAS/FCS

Furthermore, in order to extend the maintenance intervals, several air filters can be installed
in parallel in the main sampling pipe. This requires the main sampling pipe to be split into one
or several pipes and to be equipped with the same air filter or the combination of air filters.
The individual pipes can then alternatively be either combined again to one main sampling
pipe or be separately continued into the monitoring area(s). The same design specifications
for the individual air filters shall apply as stated in the projection tables in the appendix.

3.6.6 Water Separator for Humid Areas

If the smoke aspiration system is operated in environments where condensate can form in the
aspiration system, a water separator is used. Condensate can form with sharp temperature
fluctuations and in areas where fresh air is monitored.For areas with extremely high humidity,
the FAS-ASD-WS Water Separator can be used, for example.
The FAS-ASD-WS Water Separator is integrated at the lowest point in the pipe system
downstream of the air filter and the aspirating smoke detector. The 45° pipe elbow permits
optimum distance from the wall.

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1

2

3

3

FAS-420-TM series

FAS‑ASD‑WS Water Separator for condensing water vapor
and collecting condensate from the pipe system

1 Water separator

2 Pipe system connection

3 45° pipe elbow

The FAS‑ASD‑WS Water Separator can be operated in a temperature range from 0°C to
+50°C. The sintered metal filter in the water separator has a pore width of 50µm and causes
an additional rough absorption of soil particles.The FAS-ASD-WS is supplied with an angle
support and PG cable glands. The 45° pipe elbows (4 units) must be ordered separately.

3.6.7 Detonation Safety Barrier for Potentially Explosive Areas

Ex

FAS / FCS

1

6

7

2
3
4
5

> 1 m

> 1 m

Detonation safety barrier in the aspiration pipe system and if
necessary in the air-return pipe

1 Metal pipe

2 Detector module

3 Airflow sensor

4 Aspiration unit

5 Air-return pipe

6 Pipe system

7 Detonation safety barrier

Vapor/air and/or gas/air mixture ignition in the aspirating smoke detector may result in pipe
explosion or detonation. This depends on the composition, concentration, temperature, and
pressure of the flammable mixture.
The detonation safety barrier is a flame trap that is flame-proof in the face of pipe explosions
(deflagrations) and detonations.

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In normal operation, the steam and gas mixtures flow in any direction through the safety
barrier. An ignition of the mixture in the upstream aspirating smoke detector will cause the
developing detonation to be arrested. Ignition is prevented by the flame filter. Combustion of
the mixture in the flame filters may cause a rebound of the detonation front. To prevent this, a
minimum pipe length of 1.0m between the installation point of the detonation safety barrier
and a possible ignition source (aspirating smoke detector) must be maintained. Permanent
fire prevention is thus achieved indirectly.

!

Caution!

The connecting pipe between the aspirating smoke detector and the detonation safety barrier
must be made of metal. During installation, care must be taken to ensure that the threaded
connections are bolted together gas-tight using synthesol or sealing tape.

3.7 Scope of Delivery: Smoke Aspiration System

Basic devices and accessories

Designation product ID

FCS-320-TP1 Standard unit F.01U.141.197

FCS-320-TP2 Standard unit F.01U.141.198

DM-TP-50(80) Detector module 4.998.143.394

DM-TP-10(25) Detector module 4.998.143.395

DM-TP-01(05) Detector module 4.998.143.396

TITANUS MT-1 MT-1 device mounting for aspirating smoke detector 4.998.143.410

FAS-ASD-DIAG DIAG diagnostic software including connection cable, for

USB port

F.01U.033.505

FCA‑320‑Reset Reset board F.01U.141.199

FCS-320-IK Installation kit F.01U.141.201

RAS Test Pipe Test pipe 4.998.148.848

RAS Test
Adapter

Test Adapter 4.998.148.849

Pipe system components

Designation product ID

FAS-ASD-PHF16 Polywell aspiration hose, flexible, black, halogen-free F.01U.029.719

FAS-ASD­TRPG16

Ring nut with PG16 internal thread, 5per set F.01U.029.721

FAS-ASD-CSL Quick-lock coupling, straight, PG16 internal thread F.01U.029.720

FAS-ASD-3WT Three-way tap, incl. fittings, for 25mm pipe system F.01U.029.718

FAS-ASD-F Flange for ventilation duct F.01U.029.722

FAS-ASD-AR Aspiration reduction, with 10mm bore for attaching an

aspiration reducing film sheet, 10 per set

F.01U.029.724

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Designation product ID

FAS-ASD-CLT Ceiling lead-through, white, ABS, 10 per set F.01U.029.725

FAS-ASD-AHC Aspiration hose (PE) for ceiling lead-through F.01U.029.727

FAS-ASD-DSB Detonation safety barrier for 25mm pipe system F.01U.029.716

FAS-ASD-WS Water separator with sintered metal filter and manual

drain valve, including mounting bracket and PG cable
glands for 25mm pipe system

F.01U.029.717

FAS-ASD-FL Large air filter box, for 25mm pipe system, inc. 1 filter

set and two PG29 screw connections

F.01U.029.714

FAS-ASD-RFL Replacement filter set for large air filter box F.01U.029.715

Notice!

Four 45° pipe elbows are required to install the FAS-ASD-WS water separator.

Air sampling opening components

Designation product ID

Marking tape for aspiration reducing film sheet AF-BR, 10 units. 4.998.143.413

Aspiration reducing film sheet 2.0mm AF-2.0, 10 units. 4.998.143.416

Aspiration reducing film sheet 2.5mm AF-2.5, 10 units. 4.998.143.417

Aspiration reducing film sheet 3.0mm AF-3.0, 10 units. 4.998.143.418

Aspiration reducing film sheet 3.2mm AF-3.2, 10 units. 4.998.143.419

Aspiration reducing film sheet 3.4mm AF-3.4, 10 units. 4.998.143.420

Aspiration reducing film sheet 3.6mm AF-3.6, 10 units. 4.998.143.422

Aspiration reducing film sheet 3.8mm AF-3.8, 10 units. 4.998.143.423

Aspiration reducing film sheet 4.0mm AF-4.0, 10 units. 4.998.143.424

Aspiration reducing film sheet 4.2mm AF-4.2, 10 units. 4.998.143.425

Aspiration reducing film sheet 4.4mm AF-4.4, 10 units. 4.998.143.426

Aspiration reducing film sheet 4.6mm AF-4.6, 10 units. 4.998.143.427

Aspiration reducing film sheet 5.0mm AF-5.0, 10 units. 4.998.143.428

Aspiration reducing film sheet 5.2mm AF-5.2, 10 units. 4.998.143.429

Aspiration reducing film sheet 5.6mm AF-5.6, 10 units. 4.998.143.430

Aspiration reducing film sheet 6.0mm AF-6.0, 10 units. 4.998.143.431

Aspiration reducing film sheet 6.8mm AF-6.8, 10 units. 4.998.143.432

Aspiration reducing film sheet 7.0mm AF-7.0, 10 units. 4.998.143.433

28 en | Technical Specifications Aspirating Smoke Detector

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Notice!

Plastic clips for deep-freeze facilities and blowing-out systems are sold separately.

3.8 Technical data

3.8.1 FCS-320 Series Aspirating Smoke Detectors

Electrical

Power supply 15VDC to 33VDC

auxiliary power supply 14VDC to 30VDC

Current consumption from auxiliary power supply
(at24V)

FCS-320‑TP1
FCS-320-TT1

FCS-320‑TP2
FCS-320‑TT2

– Starting current, fan voltage 6.9V 300mA 330mA

– Starting current, fan voltage 9V 300mA 330mA

– On standby, fan voltage 6.9V 200mA 230mA

– On standby, fan voltage 9V 260mA 310mA

– On alarm, fan voltage 6.9V 230mA 290mA

– On alarm, fan voltage 9V 290mA 370mA

Mechanics

Displays on the device FCS-320-TP1/FCS-320-TP2

– Operation Green LED

– Fault Yellow LED

– Alarm 1 red LED/2 red LEDs

Displays on the device FCS-320-TT1/FCS-320-TT2

– Operation Green LED

– Fault Yellow LEDs

– Level display 1 x / 2 x smoke level display, each

with 10segments (1–10)

– Alarm 1 x 3 / 2 x 3 red LEDs for info alarm,

pre-alarm and main alarm

Conical duct connections for Ø25mm

– Aspiration pipe 1 pipe/2 pipes

– Air-return pipe 1 pipe

Cable bushings 5 x M 20 and 2 x M 25

Dimensions (H x W x D) 292 x 200 x 113mm

Weight Approx. 1.5kg

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Housing material Plastic (ABS)

Housing color Papyrus white (RAL 9018)

Environmental conditions

Protection category as per EN 60529 IP 20

Permissible temperature range of aspirating smoke
detector

-20°C to +60°C

Permissible relative humidity (non-condensing) 10 to 95%

Special features

sound power level 45 dB(A)

Max. response sensitivity (max. light obscuration)

– DM‑TP‑50(80) Detector Module 0.5%/m (0.8%/m) *

– DM‑TP‑10(25) Detector Module 0.1%/m (0.25%/m) *

– DM‑TP‑01(05) Detector Module 0.015%/m (0.05%/m) *

Life cycle of the fan (12V) 43,000 hrs at 24°C

* The sensitivity value is based on measurements with standard test fires (old value in
brackets).

3.8.2 Pipe System

FCS-320-TP1
FCS-320-TT1

FCS-320-TP2
FCS-320-TT2

Maximum pipe length 300m 2 x 280m

Maximum number of air sampling openings 32 2 x 32

Maximum size of monitoring area 2880m

2

5760m

2

Permissible temperature range

– PVC pipe system 0°C to +60°C

– ABS pipe system -40°C to +80°C

3.8.3 Smoke Aspiration System Components

Water separator (FAS‑ASD‑WS)

Features For use in areas with very high humidity

Plastic housing with manual drain valve

Sintered metal filter

PG cable glands for 25mm pipe system

Incl. assembly bracket

Dimensions (H x W x D) 210 x 170 x 90mm

Weight Approx. 1.4kg

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Filterbox, large (FAS‑ASD‑FL)

Features For use in areas with increased exposure to dust

Incl. filter set and two PG29 cable glands

Housing material ABS plastic

Housing color Light gray RAL 7035

Dimensions (H x W x D) 194 x 122 x 96mm

Application temperature
range

-30°C to +70°C

Replacement filter set, large (FAS‑ASD‑RFL)

Features Set comprising one fine, one medium and one coarse filter

insert (60ppi, 45ppi and 25ppi)

Application temperature
range

-30°C to +70°C

Detonation safety barrier (FAS‑ASD‑DSB)

Type PROTEGO Type EG IIA

Explosion group II A

Flame filter 3-way

Gap width 0.7mm

Pipe connection thread G 3/4 inch, incl. transition thread on one side for connecting

to the aspiration pipe system

Length x diameter 112mm x 80mm

Certification EC type-tested

Three way tap (FAS‑ASD‑3WT)

Features With 3 transition threads for connection to a 25mmpipe

system

Operating pressure Max. 10bar

Housing material PVC plastic

Seal Teflon (PTFE)

Length 131mm

Application temperature
range

0°C to +50°C

Ceiling lead-through (FAS‑ASD‑CLT) with aspiration hose (FAS‑ASD‑AHC)

Maximum false ceiling
thickness

35mm

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Max. length of aspiration
hose per ceiling lead­through

1m

Ceiling lead-through fitting
material

ABS

Aspiration hose material PE

Color of aspiration hose
and ceiling lead-through

White

Application temperature
range

-40°C to +80°C

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4 Planning

Basic information on the relevant topics can be found in
– Regulations, page 32
– Principles of Pipe Planning, page 33
– Airflow monitoring, page 36
– Defining the Response Sensitivity, page 37
– Planning Limits, page 38.
The following sections describe plans with standard requirements for airflow monitoring:
– Standard Pipe Planning, page 39
– Planning for Long Pipe Feed Lines, page 58
– Simplified Pipe Planning, page 55
The pipe plan for more sensitive airflow monitoring is described in
– Pipe Planning for Single-Hole Monitoring, page 49.
The plan for monitoring air-conditioning ducts is described in
– Planning for Forced Airflow, page 69.
The principles for measuring power supply and pipe length are contained in
– Power Supply, page 76.

4.1 Regulations

The planning regulation below is based on the system limits of the FCS-320 series. Here, the
corresponding national regulations of the countries in their respectively applicable version
must be adhered to and planning must be adjusted to these.
The planning for the aspirating smoke detector in accordance with EN 54‑20 or ISO 7240-20 is
described below. The basic conditions are specified in Regulations. Planning must be carried
out in accordance with Standard Pipe Planning. In addition to Standard Pipe Planning, special
applications are also bound by the restrictions of the planning notes in accordance with
Planning with Single-hole Monitoring and the following sections. These must be taken into
account from the start in the case of any special planning processes.

Planning options in accordance with EN 54‑20 or ISO 7240‑20:

Various technical solutions are available to suit different planning criteria. The following table
lists the chapters in which the solutions are described.

Planning criteria Technical solution Principles Restriction

Area monitoring in
general

Basic planning Section

Standard Pipe
Planning

Detection of failure of a
single opening

Single-hole monitoring
planning

Section
Standard Pipe
Planning

Section Pipe
Planning for
Single-Hole
Monitoring

Equipment protection/
cabinet monitoring

Simplified pipe planning Section

Standard Pipe
Planning

Section
Simplified Pipe
Planning

Long supply lines Planning with long supply

lines

Section
Standard Pipe
Planning

Section Planning
for Long Pipe
Feed Lines

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Planning criteria Technical solution Principles Restriction

Reducing transport time Planning with acceleration

openings

Section
Standard Pipe
Planning

Section Planning

with Acceleration
Openings, page
59

Ventilation ducts Planning for forced airflow Section

Standard Pipe
Planning

Section Planning

for Forced Airflow,
page 69

EN 54‑20 or ISO 7240‑20
For VdS systems, compliance is also required with the following guidelines:
– "Guideline for automatic fire detection systems, planning and installation", VdS

Schadenverhütung GmbH, Cologne (VdS2095)

– The guideline "Installation protection for electrical and electronic systems" VdS

Schadenverhütung GmbH, Cologne (VdS2304)

– The "Planning Aspirating Fire Detectors" data sheet from VdS Schadenverhütung GmbH,

Cologne (VdS 3435)
The applicable national regulations must also be observed, for example in Germany:
– DIN VDE0833 parts1 and 2 "Alarm systems for fire, intrusion and hold-up"
– Additional provisions for the installation of fire detection systems, which are published by

fire directors of fire departments, by the construction supervision authorities or by the

construction law authorities that have only local validity.

Notice!

For planning, the system limits in accordance with Planning Limits are to be observed.
Select airflow monitoring and the associated planning limits (see Airflow Monitoring) and
check these for any restrictions imposed by country-specific regulations.
If the on-site planning deviates from the standard plans described below, this must always be
checked with activation attempts for correct detection of a malfunction and a fire. A special
plan may be required.
Plans not contained in the operation guide must be requested.

4.2 Principles of Pipe Planning

The aspiration pipe network must be designed such that all possible fires in the monitoring
area can be dealt with at an early stage.
The number of air sampling openings and the structure of the pipe system depend on the size
and geometry of the monitoring range. The pipe system must be laid out according to the
planning guidelines in this chapter, taking into account the following issues:

Symmetrical structure

The pipe system should preferably have a symmetrical structure, i.e.
– Same number of air sampling openings per pipe branch
– Same pipe branch lengths (should not exceed ±20% deviation)
– Same distance between neighboring air sampling openings on the smoke aspiration pipe

(should not exceed ±20% deviation).

Asymmetrical structure

If structural circumstances dictate that the pipe system is to be designed asymmetrically, the
following conditions apply:
– The number of air sampling openings and the length of the shortest and longest pipe

branch within the pipe system must not exceed a quantity ratio of 1:2.

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– The distance between neighboring air sampling openings on the smoke aspiration pipe

must be equal (should not exceed ±20% deviation).

– The diameters of the air sampling openings are determined separately for each pipe

branch. The diameters depend on the total number of air sampling openings in the pipe

branch in question.
The figure shows a typical U-pipe system with three or six air sampling openings and the air
sampling opening diameters calculated according to Standard Pipe Planning.

A

B

FAS / FCS

2,5

3,4 3,6 3,8

3,0 2,35,25,2 3,0

0,35,2 2,35,25,2 3,0

0,35,2 2,35,25,2 3,0

A Symmetrical pipe system
B Asymmetrical pipe system

Tab.4.1: Example of a symmetrical and an asymmetrical U-pipe system

In many applications, greater distances between the aspirating smoke detector and the
aspiration pipe must be bridged. This is done using pipes with greater diameters (40mm),
which guarantees maximum planning (see also Planning for Long Pipe Feed Lines). However,
pipes with greater diameters restrict the length of the pipe system.

Branch length

To achieve short transport times for the smoke aerosols in the aspiration pipe and thus quick
detection, it is better to plan several short branches than fewer long ones (preferably U and
double U-pipe system).

Pipe configurations

Depending on the area geometry, five pipe configurations can be selected:
– I-pipe: pipe system without branches.
– U-pipe: pipe system that branches into two pipe branches.
– M-pipe: pipe system that branches into three pipe branches.
– Double U-pipe: pipe system that branches symmetrically into four pipe branches.
– Quadruple U-pipe: pipe system that branches symmetrically into eight pipe branches.

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I

FAS / FCS

FAS / FCS

FAS / FCS

U

U/U

FAS / FCS

M

FAS / FCS

4U

Pipe configurations

I I-pipe system

U U-pipe system

M M-pipe system

U/U Double U-pipe system

4U Quadruple U-pipe system

Change of direction

Elbows and bends in the pipe system increase flow resistance. Therefore, they should only be
used where they cannot be avoided for structural engineering reasons. Light change of
direction (e.g. with 90 ° pipe bends or air sampling hose) are already approved as part of the
project according to EN 54-20 or ISO 7240-20 and need not be considered further.

Notice!

It is preferable to use pipe bends rather than pipe elbows.
The detection time will be influenced significantly by too high a number of changes of
direction.

Special cases

If the pipe system does not correspond to the planning guidelines described here owing to
structural circumstances, it must be calculated separately for the case in question on request.

Testing

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For critical applications, test the secure detection with activation attempts. Check also
whether there is airflow at the individual air sampling openings.

Notice!

In order to increase transport speed in critical application areas, the fan voltage can be
increased from 6.9V to 9V.

Dual-detector dependency

One aspiration line must be assigned per detector module. Both detector modules of a device
must be evaluated independently of one another. Only one extinguishing area per smoke
aspiration system may be monitored.

FAS / FCS

Pipe configurations for dual detector dependency

Two alarm stages

To implement two alarm stages, a pipe adapter for the aspiration pipe system is required. The
two detector modules in the aspirating smoke detector require different response
sensitivities.

FAS / FCS

Pipe configurations for two alarm stages using the example of a U-pipe system

See also

– Standard Pipe Planning, page 39
– Planning for Long Pipe Feed Lines, page 58

4.3 Airflow monitoring

EN 54‑20 or ISO 7240-20 requires the detection of a 20-percent change in the airflow volume
by the detector module's airflow sensor. In order to achieve this, the activation threshold of
the airflow sensor must be set to level II. Alternatively, level I can also be used. It is
recommended that airflow calibration is carried out dependent on air pressure for both of
these settings. In systems that do not need to comply with EN 54‑20 or ISO 7240-20, any
threshold can be set. The smoke aspiration pipes are planned taking into account the
applicable national regulations for the country concerned.
Adapting the airflow sensitivity
The sensitivity of the airflow sensor must be adapted to the application. For example, a long
pipe system requires a sensitive setting of the airflow sensor. The activation threshold and
thus the sensitivity of the airflow sensor can be set on 4 levels. Breakages and obstructions
must be accurately detected in the event of a malfunction.

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Setting the airflow sensitivity

Level Activation threshold Sensitivity

I Low (+/- 10% volume flow change) Very high

II Average (+/- 20% volume flow change) High

III High (+/- 30% volume flow change) Average

IV Very high (+/- 50% volume flow change) Low

Level I II III IV

Complies with EN 54‑20 or ISO
7240-20

Activation threshold Small Average Large Very large

Sensitivity Very high High Average Low

Notice!

Selection of the largest possible, precisely still-approved level is recommended.

Dynamic airflow sensors

The airflow monitoring of the unit makes it possible to detect breaks at the end of pipes and
identify sudden obstruction of individual air sampling openings (e.g. following tampering with
the pipe system). Because these dynamic airflow sensors are only active if level I was selected
for the airflow monitoring, the points outlined under "Level I restrictions" must be taken into
consideration.

Restrictions

Airflow monitoring may only be set to level I if
– planning was carried out in accordance with "single-hole monitoring"
– the airflow sensor was calibrated dependent on the air pressure
– and no larger airflow fluctuations can occur.

Air pressure differences

There must be equal air pressure along the length of the aspiration pipe.

Notice!

If the aspirating smoke detectors and the pipe system are positioned in areas with different
air pressures, the air aspirated by the FCS-320 must be returned to the pressure area of the
pipe system (see Air-Return Pipe for Pressure Areas and Atmospheric Loads).

4.4 Defining the Response Sensitivity

The sensitivity of smoke aspiration systems can be divided into certain fire sensitivity classes
in accordance with EN 54‑20 or ISO 7240-20. These fire sensitivity classes describe specific
examples of ways in which the systems can be applied. The permissible system plans given in
Standard Pipe Planning can be determined for each classification.Smoke aspiration systems
with a higher fire sensitivity class according to EN 54‑20 or ISO 7240-20 also satisfy the
requirements of the lower classes.

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Class Description Application example

A Aspirating smoke detector with

extremely high sensitivity

Very early detection: significant smoke
dilution through air conditioning in IT
areas

B Aspirating smoke detector with

increased sensitivity

Early detection: significant time gains
thanks to very early fire detection
(without air condition)

C Smoke aspiration system with normal

sensitivity

Normal detection: fire detection with the
advantages of smoke aspiration systems

Notice!

Depending on the number of air sampling openings, fire sensitivity classes A, B and C can all
be achieved with the detection modules available.

The table shows the sensitivities you can choose from

Response sensitivity (main alarm)

DM-TP-50(80) Detector
Module

DM-TP-10(25) Detector
Module

DM-TP-01(05) Detector Module

Not permissible 0.8%/m (2%/m) light

obscuration

0.12%/m (0.4%/m) light
obscuration

Not permissible 0.4%/m (1%/m) light

obscuration (standard)

0.06%/m (0.2%/m) light
obscuration (standard)

1.0%/m (1.6%/m) light
obscuration

0.2%/m (0.5%/m) light
obscuration

0.03%/m (0.1%/m) light
obscuration

0.5%/m (0.8%/m) light
obscuration (standard)

0.1%/m (0.25%/m) light
obscuration

0.015%/m (0.05%/m) light
obscuration

Notice!

The sensitivity value is based on measurements with standard test fires (old value in
brackets).

4.5 Planning Limits

The following limit values must always be observed for the FCS-320 series:

Limiting values Maximum number of air sampling openings per detector

module

32

Maximum total pipe length 300m (2 x

280m)

Minimum pipe length between 2 air sampling openings 4m

Minimum pipe length between 2 air sampling openings 12m

The maximum monitoring area of an air sampling opening corresponds to the monitoring area
of point-type detectors in accordance with the applicable planning guidelines.

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The maximum total monitoring area, the maximum total pipe length and the maximum number
of air sampling openings depend on the selected planning. They are also dependent on the
restrictions imposed by national regulations.
Depending on the planning selected, some restricted values may apply.
The values for the maximum number of air sampling openings, the maximum pipe length and
the maximum overall monitoring areas apply for each pipe system. Two pipe systems can be
connected to aspirating smoke detectors FCS-320-TP2 and FCS-320-TT2, each with two
detector modules.

4.6 Standard Pipe Planning

In order to plan in accordance with the EN 54‑20 or ISO 7240-20 standard, certain factors
must be known, such as the system sensitivity requirements, the number of air sampling
openings and the accessories needed for the application concerned. These factors can be
used to determine the appropriate standard-compliant construction of the pipe system using
the following chapter and the planning table in the appendix.

4.6.1 Determining the Necessary Accessories

As accessory components, e.g. filters, have a particular effect on the dimensions of pipe
planning, the appropriate accessory must be selected for the application concerned in
advance. Retrofitting an accessory, e.g. a fine filter, is largely only possible if a certain reserve
is planned in advance.
The following components must be taken into account in this regard:
– Air filter
– Water separator
– Three-way-tap
– Detonation safety barrier
See Section Smoke Aspiration System Components, page 29.

See also

– Smoke Aspiration System Components, page 29
– Smoke Aspiration System Components, page 29

4.6.2 Pipe Planning with Pipe Accessories

For the purpose of pipe system planning, the following planning table is available for all
selected pipe accessories.
– Planning without air filter
– Planning with FAS‑ASD‑FL air filter

Notice!

In order to improve the detection quality of a smoke aspiration system, an area can be
monitored with more detection points than required by national guidelines. However, to
calculate the necessary sensitivity of an aspirating smoke detector, the number of aspiration
points required by the standard must be used.

Procedure

In the following example, a plan with air filter with 8 openings, not fitted with any other
accessories, should satisfy class B. The red shaded areas show the potential plans with
different pipe shapes and fan voltage.

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General Example

1. Selection:
Select the planning table with or without air filter,
as applicable.

Result:

Planning table and specified air filter

Select the planning table without air filter, Planning

without filter, page 41

2. Selection:
Select the number of air sampling openings from
the planning table. Note the possible sensitivity
classes.

Result:

Specified detector module with specified setting
and alarm threshold

In the Planning without filter, page 41 table, select
the column with eight air sampling openings (Number
of air sampling openings, 8)

3. Selection:
Select the sensitivity (sensitivity class) of the
system according to the gradation described in
Defining the Response Sensitivity.

Result:

Specified sensitivity class in accordance with EN
54‑20

In the Planning without filter, page 41 table, select
the response sensitivity you require (class A, B or C)
from the column highlighted in red. You must select
the class that corresponds to the installed detector
module and the configured sensitivity.

4. Selection:
Select other pipe components, such as a water
separator and detonation safety barrier.

Result:

Specified planning table

Select With water separator, page 42 .

5. Selection:
Select the possible pipe length for the relevant pipe
shape and fan voltage.

Result:

Specified planning in accordance with EN 54‑20 for
the previously specified parameters

In the With water separator, page 42 table, select the
pipe shape and fan voltage you require, and note the
permissible total pipe length.

You will find the planning tables in question in Planning without filter and Planning with air
filter.

Abbreviation Meaning CTN

DM Detector module DM‑01(05) DM-TP-01(05)

DM‑10(25) DM-TP-10(25)

DM‑50(80) DM-TP-50(80)

S Sensitivity (% LT/m)

MA Main alarm

PA Pre-alarm

l [m] Permissible total pipe length in

meters

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Planning without filter

Number of air sampling openings

DM- S 1 2 3 4 5 6 7 8 9 10 11 12 … 32

01
(05)

0.015
(0.05)

MAA A A A A A A A A A A A A

0.03 (0.1) MAA A A A A A A A A A A A B

0.06 (0.2) MAA A A A A A A A A A A A C

0.12 (0.4) MAA A A A A A B B B B B B

10
(25)

0.1 (0.25) MAA A A A A A A A A B B B B

0.2 (0.5) MAA A A A B B B B B B B B

0.4 (1) MAA A B B B B C C C C C C

0.8 (2) MAA B B C C C

50
(80)

0.313
(0.5)

PA A A A A B B B B B B B B C

0.5 (0.8) MAA A A B B B B C C C C C

0.687
(1.1)

PA A A B B B C C C C C

1.0 (1.6) MAA B B C C C C

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Without any other pipe accessories

Number of air sampling openings

Pipe
shape

U

Fans

1 2 3 4 5 6 7 8 9 10 11 12 … 32

I 6.9 77 77 77 77 77 77 77 77 76 l

[m]

≥9 100 100 100 100 100 100 100 100 100 100 100 100

U 6.9 120 120 120 120 120 120 120 120 120 120 120 120

≥9 150 150 150 150 150 150 150 150 150 150 150 150

M 6.9 170 170 170 170 170 170 170 170 170 170 170 170

≥9 180 180 180 180 180 180 180 180 180 180 180 180

2 x U 6.9 180 180 180 180 180 180 180 180 180 180 180 180

≥9 200 200 200 200 200 200 200 200 200 200 200 200

4 x U (1
DM)

6.9

≥9 300 300 300 300 300 300 300 300 300 300 300 300 300

With water separator

Number of air sampling openings

Pipe
shape

U

Fans

1 2 3 4 5 6 7 8 9 10 11 12 … 32

I 6.9 60 60 60 60 60 60 60 l [m]

≥9 80 80 80 80 80 80 80 80 80 80

U 6.9 110 110 110 110 110 110 110 110 110 110 110 110

≥9 110 110 110 110 110 110 110 110 110 110 110 110

M 6.9 110 110 110 110 110 110 110 110 110 110 110 110

≥9 160 160 160 160 160 160 160 160 160 160 160 160

2 x U 6.9 140 140 140 140 140 140 140 140 140 140 140 140

≥9 160 160 160 160 160 160 160 160 160 160 160 160

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With detonation safety barrier

Number of air sampling openings

Pipe
shape

U

Fans

1 2 3 4 5 6 7 8 9 10 11 12 … 32

I 6.9 46 46 46 46 38 l [m]

≥9 68 68 68 68 68 68

U 6.9 60 60 60 60 60 60

≥9 60 60 60 60 60 60 60 60

M 6.9 80 80 80 80 80 80 70 70 70

≥9 120 120 120 120 120 120 120 120 120

2 x U 6.9 80 80 80 80 80 80 80 80

≥9 100 100 100 100 100 100 100 100

Results

The following modules can be used with the relevant settings for class B or A:
– 0.015% LT/m (0.05% LT/m) module – with a sensitivity of min. 0.12% LT/m (0.4% LT/m)
– 0.1% LT/m (0.25% LT/m) module – with a sensitivity of min. 0.2% LT/m (0.5% LT/m)
– 0.5% LT/m (0.8% LT/m) module – with setting 0.5% LT/m (0.8% LT/m)
System parameters possible:
– I-pipe system

9V fan voltage, max. 80m total pipe length for U-pipe system

– U-pipe system

6.9V fan voltage, max. 110m total pipe length
9V fan voltage, max. 110m total pipe length

– M-pipe system

6.9V fan voltage, max. 110m total pipe length
9V fan voltage, max. 160m total pipe length

– Double U-pipe system

6.9V fan voltage, max. 140m total pipe length
9V fan voltage, max. 160m total pipe length

Notice!

The sensitivity value is based on measurements with standard test fires (old value in
brackets).

I-pipe system for space protection

The diameters of the air sampling openings should be taken from the relevant table for each
pipe configuration:

1 pipe system
FCS-320-TP1
FCS-320-TT1
2 pipe systems
FCS-320-TP2
FCS-320-TT2

FAS / FCS

A

B

C D E L MF

A

B

C D E L MF

I-pipe system for space protection

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Limiting values Min. distance: FCS-320 – 1st air sampling opening 4m

I-pipe system Max. distance: FCS-320 – 1st air sampling opening 20m

Max. distance: 1st air sampling opening – last air sampling opening
– With low fan voltage
– With high fan voltage

56m
80 m

Max. overall pipe length per pipe system (Ø 25mm)
– With low fan voltage
– With high fan voltage

76m
100m

Min. distance between 2 air sampling openings 4m

Max. distance between 2 air sampling openings 12m

Max. number of air sampling openings (n) per pipe system 13

I-pipe system Air sampling

opening

Number of air sampling openings

1 2 3 4 5 6 7 8 9 10 11 12 13

∅ air sampling
opening in
mm

a

A 7.0 6.0 5.2 4.6 4.2 3.8 3.6 3.4 3.0 3.0 2.5 2.5 2.5

B 6.8 5.2 4.6 4.2 3.8 3.6 3.4 3.0 3.0 2.5 2.5 2.5

C 5.6 4.6 4.4 4.0 3.8 3.4 3.2 3.0 3.0 3.0 2.5

D 5.0 4.4 4.0 3.8 3.4 3.4 3.0 3.0 3.0 2.5

E 4.4 4.2 3.8 3.6 3.6 3.4 3.0 3.0 3.0

F 4.2 3.8 3.8 3.6 3.4 3.4 3.0 3.0

G 4.0 3.8 3.6 3.6 3.4 3.2 3.0

H 4.0 3.8 3.6 3.4 3.2 3.0

I 3.8 3.6 3.6 3.2 3.2

J 3.8 3.8 3.2 3.2

K 3.8 3.8 3.4

L 4.0 3.8

M 4.0

a

Punch diameter of the aspiration reducing film sheet

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U-pipe system for space protection

1 pipe system
FAS‑420‑TP1
FAS‑420‑TT1

2 pipe systems
FAS‑420‑TP2
FAS‑420‑TT2

FAS / FCS

FAS / FCS

A B C D I J

A B C D I J

U-pipe system for space protection

Limiting values Min. distance: FCS-320 – T-fitting 4m

U-pipe system Max. distance: FCS-320 – T-fitting 20 m

Max. branch length
– With low fan voltage
– With high fan voltage

50m
65m

Max. overall pipe length per pipe system (Ø 25mm)
– With low fan voltage
– With high fan voltage

120m
150m

Min. distance between 2 air sampling openings 4m

Max. distance between 2 air sampling openings 12m

Max. number of air sampling openings (n) per pipe system 20

U-pipe system Air sampling

opening

Number of air sampling openings

2 4 6 8 10 12 14 16 18 20

∅ air sampling
opening in mm

a

A 5.2 3.6 3.4 3.0 2.5 2.5 2.0 2.0 2.0 2.0

B 4.4 3.4 3.0 3.0 2.5 2.0 2.0 2.0 2.0

C 3.6 3.2 3.0 2.5 2.5 2.0 2.0 2.0

D 3.4 3.2 3.0 2.5 2.5 2.0 2.0

E 3.2 3.0 3.0 2.5 2.5 2.0

F 3.4 3.2 3.0 2.5 2.5

G 3.6 3.4 3.0 2.5

H 3.6 3.4 2.5

I 3.6 3.6

J 3.8

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a

Punch diameter of the aspiration reducing film sheet

M-pipe system for space protection

1 pipe system
FCS-320-TP1
FCS-320-TT1

2 pipe systems
FCS-320-TP2
FCS-320-TT2

A B C D E F

A B C D E F

FAS / FCS

FAS / FCS

M-pipe system for space protection

Limiting values Min. distance: FCS-320 – last T-fitting 4m

M-pipe Max. distance: FCS-320 – last T-fitting 20 m

Max. branch length
– With low fan voltage
– With high fan voltage

46m
53m

Max. overall pipe length per pipe system (Ø 25mm)
– With low fan voltage
– With high fan voltage

170m
180m

Min. distance between 2 air sampling openings 4m

Max. distance between 2 air sampling openings 12m

Max. number of air sampling openings (n) per pipe system 21

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M-pipe system Air sampling opening Number of air sampling openings

3 6 9 12 15 18 21

∅ air sampling
opening in mm

a

A 4.4 3.4 3.0 2.5 2.5 2.0 2.0

B 3.6 3.0 2.5 2.5 2.5 2.0

C 3.2 3.2 2.5 2.5 2.0

D 3.2 3.0 2.5 2.5

E 3.2 3.0 2.5

F 3.2 3.2

G 3.4

a

Punch diameter of the aspiration reducing film sheet

Double U-pipe system for space protection

1 pipe system
FCS-320-TP1
FCS-320-TT1

2 pipe systems
FCS-320-TP2
FCS-320-TT2

FAS / FCS

FAS / FCS

F

F

B

B

A

A

Double U-pipe system for space protection

Limiting values Min. distance: FCS-320 – last T-fitting 4m

Double U-pipe Max. distance: FCS-320 – last T-fitting 20 m

Max. branch length
– With low fan voltage
– With high fan voltage

40m
45m

Max. overall pipe length per pipe system (Ø 25mm)
– With low fan voltage
– With high fan voltage

180m
200m

Min. distance between 2 air sampling openings 4m

Max. distance between 2 air sampling openings 12m

Max. number of air sampling openings (n) per pipe system 24

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Double U-pipe
system

Air sampling opening Number of air sampling openings

4 8 12 16 20 24

∅ air sampling
opening in mm

a

A 4.0 3.0 2.5 2.0 2.0 2.0

B - 3.4 3.0 2.5 2.0 2.0

C - - 3.0 3.0 2.5 2.0

D - - - 3.2 2.5 2.5

E - - - - 3.6 2.5

F - - - - - 3.6

a

Punch diameter of the aspiration reducing film sheet

Quadruple U-pipe system for space protection

1 pipe system
FCS-320-TP1
FCS-320-TT1

A B C D

FAS / FCS

Quadruple U-pipe system for space protection

Limiting values Min. distance: FCS-320 – last T-fitting 4m

Double U-pipe Max. distance: FCS-320 – last T-fitting 20 m

Max. branch length
– With high fan voltage 35m

Max. overall pipe length per pipe system (Ø 25mm)
– With high fan voltage 300m

Min. distance between 2 air sampling openings 4m

Max. distance between 2 air sampling openings 12m

Max. number of air sampling openings (n) per pipe system 32

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Quadruple U-pipe
system

Air sampling opening Number of air sampling openings

8 16 24 32

∅ air sampling
opening in mm

a

A 3.20 2.5 2.0 2.0

B - 3.0 2.5 2.0

C - - 3.0 2.0

D - - - 2.5

a

Punch diameter of the aspiration reducing film sheet

See also

– Defining the Response Sensitivity, page 37
– Planning without filter, page 123
– Planning with air filter, page 125

4.7 Pipe Planning for Single-Hole Monitoring

Depending on the pipe configuration, the following system parameters are used to detect a
single air sampling opening or a particular number of obstructed air sampling openings.
Planning is to be carried out according to regulations specified in Standard Pipe Planning.
Additionally, the following limiting values and opening diameters must be observed. An
additional accessory (air filter, condensate separator etc.) can have an effect on the maximum
pipe length.

I-pipe system - single-hole monitoring

1 pipe system FCS-320­TP1 FCS-320-TT1

2 pipe systems FCS-320­TP2 FCS-320-TT2

FAS / FCS

A

B

C D E I JF

A

B

C D E I JF

I-pipe system for space protection

Limiting values Min. distance FCS-320– 1st air sampling opening 4m

I-pipe system Max. distance FCS-320 – 1st air sampling opening 20m

Max. distance: 1st air sampling opening – last air sampling opening
– With low fan voltage
– With high fan voltage

40m
60m

Max. overall pipe length (Ø 25mm)
– With low fan voltage
– With high fan voltage

60m
80m

Min. distance between 2 air sampling openings 4m

Max. distance between 2 air sampling openings 12m

Max. number of air sampling openings (n) per pipe system 10

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I-pipe system Air sampling

opening

Number of air sampling openings

2 3 4 5 6 7 8 9 10

∅ air sampling
opening in mm

a

A 6.0 5.0 4.2 3.8 3.2 3.0 2.5 2.5 2.0

B 6.8 5.2 4.4 3.8 3.2 3.0 2.5 2.5 2.0

C - 5.2 4.6 4.0 3.6 3.0 3.0 2.5 2.5

D - - 4.6 4.0 3.6 3.4 3.0 3.0 2.5

E - - - 4.4 4.0 3.4 3.4 3.0 3.0

F - - - - 4.0 3.8 3.4 3.4 3.0

G - - - - - 3.8 3.8 3.4 3.4

H - - - - - - 3.8 3.8 3.4

I - - - - - - - 3.8 3.6

J - - - - - - - - 3.6

a

Punch diameter of the aspiration reducing film sheet

I-pipe system activation thresholds

Activation
thresholds

Number of openings 2 3 4 5 6 7 8 9 10

1 obstructed opening III III II I I — — — —

2 obstructed openings 0 0 III III II I I — —

3 obstructed openings 0 0 0 0 III III II I I

4 obstructed openings 0 0 0 0 0 0 III II I

5 obstructed openings 0 0 0 0 0 0 0 0 II

… will be recognized by the setting level x

— not possible, 0 not practical

Example

If 3 of a total of 7 air sampling openings are found to be obstructed, the switch for setting the
airflow monitoring should be set to level III.

Notice!

When planning in accordance with EN 54‑20 or ISO 7240-20, level I or II must always be set
for airflow monitoring.

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U-pipe system - single-hole monitoring

1 pipe system
FCS-320-TP1
FCS-320-TT1

2 pipe systems
FCS-320-TP2
FCS-320-TT2

FAS / FCS

FAS / FCS

A B C D E G

A B C D E G

U-pipe system for space protection

Limiting values Min. distance FCS-320 – T-fitting 4m

U-pipe system Max. distance FCS-320 – T-fitting 20m

Max. branch length
– With low fan voltage
– With high fan voltage

40m
50m

Max. overall pipe length per pipe system (Ø 25mm)
– With low fan voltage
– With high fan voltage

100m
120m

Min. distance between 2 air sampling openings 4m

Max. distance between 2 air sampling openings 12m

Max. number of air sampling openings (n) per pipe system 14

U-pipe system Air sampling opening Number of air sampling openings

2 4 6 8 10 12 14

Ø air sampling
opening in mm

a

A 5.2 3.6 3.4 3.2 2.5 2.5 2.0

B - 4.0 3.4 3.2 3.0 2.5 2.0

C - - 3.6 3.4 3.0 2.5 2.5

D - - - 3.4 3.2 3.0 2.5

E - - - - 3.2 3.0 3.0

F - - - - - 3.2 3.0

G - - - - - - 3.2

a

Punch diameter of the aspiration reducing film sheet

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U-pipe system activation thresholds per pipe system

Activation
thresholds

Number of openings 2 4 6 8 10 12 14

1 obstructed opening III II I — — — —

2 obstructed openings 0 III II I — — —

3 obstructed openings 0 0 III II I — —

4 obstructed openings 0 0 0 III II I —

5 obstructed openings 0 0 0 0 III II I

6 obstructed openings 0 0 0 0 0 III II

… will be recognized by the setting level x

— not possible, 0 not practical

Example

If 3 of a total of 10air sampling openings are found to be obstructed, the switch for setting
the airflow monitoring should be set to level I.

Notice!

When planning in accordance with EN 54‑20 or ISO 7240-20, level I or II must always be set
for airflow monitoring.

M-pipe system - single-hole monitoring

1 pipe system
FCS-320-TP1
FCS-320-TT1

2 pipe systems
FCS-320-TP2
FCS-320-TT2

d

d

A

B C D

A

B C D

FAS / FCS

FAS / FCS

M-pipe system for space protection

Limiting values Min. distance FCS-320 – last T-fitting 4m

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Double U-pipe Max. distance FCS-320 – last T-fitting 20m

Max. branch length
– With low fan voltage
– With high fan voltage

30m
40m

Max. overall pipe length per pipe system (Ø 25mm)
– With low fan voltage
– With high fan voltage

110m
140m

Min. distance between 2 air sampling openings 4m

Max. distance between 2 air sampling openings 12m

Max. number of air sampling openings (n) per pipe system 12

M-pipe Air sampling opening Number of air sampling openings

3 6 9 12

Ø air sampling
opening in mm

a

A 4.4 3.4 3.0 2.5

B - 3.6 3.0 2.5

C - - 3.2 3.2

D - - - 3.2

a

Punch diameter of the aspiration reducing film sheet

M-pipe system activation thresholds per pipe system

Activation
thresholds

Number of openings 3 6 9 12

1 obstructed opening III I — —

2 obstructed openings 0 II — —

3 obstructed openings 0 III I —

4 obstructed openings 0 0 II I

5 obstructed openings 0 0 0 II

6 obstructed openings 0 0 0 III

7 obstructed openings 0 0 0 0

… will be recognized by the setting level x

— not possible, 0 not practical

Example

If 3 of a total of 9air sampling openings are found to be obstructed, the switch for setting the
airflow monitoring should be set to level I.

Notice!

When planning in accordance with EN 54‑20 or ISO 7240-20 , level I or II must always be set
for airflow monitoring.

54 en | Planning Aspirating Smoke Detector

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Double U-pipe system - single-hole monitoring

1 pipe system
FCS-320-TP1
FCS-320-TT1

2 pipe systems
FCS-320-TP2
FCS-320-TT2

FAS / FCS

FAS / FCS

C

C

B

B

A

A

Double U-pipe system for space protection

Limiting values Min. distance FCS-320– last T-fitting 4m

Double U-pipe Max. distance FCS-320 – last T-fitting 20m

Max. branch length
– With low fan voltage
– With high fan voltage

20m
30m

Max. overall pipe length per pipe system (Ø 25mm)
– With low fan voltage
– With high fan voltage

100m
140m

Min. distance between 2 air sampling openings 4m

Max. distance between 2 air sampling openings 12m

Max. number of air sampling openings (n) per pipe system 12

Double U-pipe Air sampling opening Number of air sampling openings

4 8 12

Ø air sampling
opening in mm

a

A 4.0 3.0 2.5

B - 3.4 3.0

C - - 3.0

a

Punch diameter of the aspiration reducing film sheet

Double U-pipe system activation thresholds per pipe system

Activation
thresholds

Number of openings 4 8 12

1 obstructed opening I — —

2 obstructed openings II I —

3 obstructed openings 0 II I

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4 obstructed openings 0 III II

5 obstructed openings 0 0 III

6 obstructed openings 0 0 III

… will be recognized by the setting level x

— not possible, 0 not practical

Example

If 4 of a total of 12air sampling openings are found to be blocked, the switch for setting the
airflow monitoring should be set to level II.

Notice!

When planning in accordance with EN 54‑20 or ISO 7240-20, level I or II must always be set
for airflow monitoring.

See also

– Standard Pipe Planning, page 39

4.8 Simplified Pipe Planning

Simplified planning is used for equipment protection and in premises with smaller
dimensions. The benefit of this type of planning is the standard diameters of the suction
openings.
Planning is to be carried out according to regulations specified in Standard Pipe Planning.
Additionally, the following limiting values and opening diameters must be observed. An
additional accessory (air filter, condensate separator etc.) can have an effect on the maximum
pipe length.

I-pipe system - simplified planning

1 pipe system
FCS-320-TP1
FCS-320-TT1

2 pipe systems
FCS-320-TP2
FCS-320-TT2

FAS / FCS

FAS / FCS

d

d

i 1

2

3

4

5

6

7

8

9

10

i

12

1

2

3

4

5

6

7

8

9

10

1

2

3

4

5

6

7

8

9

10

I-pipe system, e.g. for equipment protection

Limiting values Min. distance FCS-320 – 1st air sampling opening 2m

I-pipe system Max. distance FCS-320 – 1st air sampling opening 20m

Max. distance: 1st air sampling opening – last air sampling opening 20m

Max. overall pipe length (Ø 25mm) 40m

Min. distance between air sampling openings 0.1m

Max. distance between air sampling openings 4m

Max. number of air sampling openings (n) per pipe system 18

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I-pipe system Number of air sampling openings

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Ø of all air sampling openings
in mm

a

6.0 5.0 4.4 4.0 3.6 3.4 3.2 3.0 3.0 3.0 3.0 2.5 2.5 2.5 2.5 2.5 2.5

a

Punch diameter of the aspiration reducing film sheet

U-pipe system - simplified planning

1 pipe system
FCS-320-TP1
FCS-320-TT1

2 pipe systems
FCS-320-TP2
FCS-320-TT2

FAS / FCS

FAS / FCS

d

d

i

12

1

2

3

4

5

6

7

8

9

10

1

2

3

4

5

6

7

8

9

10

i

1

2

3

4

5

6

7

8

9

10

U-pipe system, e.g. for equipment protection

Limiting values Min. distance FCS-320 – T-fitting 2m

U-pipe system Max. distance FCS-320 – T-fitting 20m

Max. branch length 20m

Max. overall pipe length (Ø 25mm) 60m

Min. distance between air sampling openings (d) 0.1m

Max. distance between air sampling openings (d) 4m

Max. number of air sampling openings (n) per pipe system 18

U-pipe system Number of air sampling openings

2 4 6 8 10 12 14 16 18

Ø of all air sampling openings in
mm

a

6.0 4.4 3.6 3.2 3.0 3.0 2.5 2.5 2.5

a

Punch diameter of the aspiration reducing film sheet

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M-pipe system - simplified planning

1 pipe system
FCS-320-TP1
FCS-320-TT1

2 pipe systems
FCS-320-TP2
FCS-320-TT2

d

d

A

B C D

A

B C D

FAS / FCS

FAS / FCS

M-pipe system, e.g. for space protection

Limiting values Min. distance FCS-320 – last T-fitting 2m

Double U-pipe Max. distance FCS-320 – last T-fitting 20m

Max. branch length 20m

Max. overall pipe length (Ø 25mm) 80m

Min. distance between air sampling openings (d) 0.1m

Max. distance between air sampling openings (d) 4m

Max. number of air sampling openings (n) per pipe system 18

M-pipe Number of air sampling openings

3 6 9 12 15 18

Ø of all air sampling openings in mma5.0 3.6 3.0 3.0 2.5 2.5

a

Punch diameter of the aspiration reducing film sheet

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Double U-pipe system - simplified planning

1 pipe system
FCS-320-TP1
FCS-320-TT1

2 pipe systems
FCS-320-TP2
FCS-320-TT2

FAS / FCS

FAS / FCS

d

d

TITANUSPRO ·SENS 2

®

1

2

i

123456789

10

i

12

123456789

10

123456789

10

Double U-pipe system, e.g. for equipment protection

Limiting values Min. distance FCS-320 – last T-fitting 2m

Double U-pipe Max. distance FCS-320 – last T-fitting 20m

Max. branch length 20m

Max. overall pipe length (Ø 25mm) 100m

Min. distance between air sampling openings (d) 0.1m

Max. distance between air sampling openings (d) 4m

Max. number of air sampling openings (n) per pipe system 20

Double U-pipe Number of air sampling openings

4 8 12 16 20

Ø of all air sampling openings in mm

a

4.0 3.4 3.0 2.5 2.0

a

Punch diameter of the aspiration reducing film sheet

See also

– Standard Pipe Planning, page 39

4.9 Planning for Long Pipe Feed Lines

Pipes with a 40mm diameter are required for planning pipe feed line A. Area B is designed
with 25mm pipes in accordance with Standard Pipe Planning. The plan applies for the pipe
configurations described above.

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AA BB CC DD EE FF

A

i

12

1

2

3

4

5

6

7

8

9

10

1

2

3

4

5

6

7

8

9

10

B

Example of a pipe system with long pipe feed lines for area monitoring

The general pipe planning is restricted by the use of long pipe feed lines as follows:
– Pipes with a40mm diameter increase transport time.
– 1m pipe with a40mm diameter replaces 3m pipe with a25mm diameter.

C

B

A

∅ 40 mm: ≤ 100 m

∅ 25 mm:

≤ 20 m

i

12

123456789

10

123456789

10

FAS / FCS

Example of special planning for high-rise warehouse

A basic pipe can be installed for high-rise warehouse planning, from which the stub-shaped
aspiration pipes are routed.

See also

– Standard Pipe Planning, page 39

4.10 Planning with Acceleration Openings

Acceleration openings

In order to meet individual regulations, it may be necessary to increase the transport time of
the systems. This can be fulfilled by fitting the ends of the pipe branches with acceleration
openings, which increase transport speed. Depending on the regulations concerning transport
time, it may be necessary to dimension an acceleration opening with the same or double the
diameter of the last air sampling opening on a pipe branch. Only authorized aids should be
used to calculate the transport time.The additional airflow of the acceleration openings also
reduces the sensitivity of the air sampling openings. If required, this reduction can be offset as
follows:

Method of resolution Primarily used in

1 Increasing the sensitivity of the detector

module

Previously installed systems

2 Reducing the number of air sampling

openings

Systems currently being planned

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1. Option: increasing the sensitivity

Reduced sensitivity at the air sampling openings can be offset by using a more sensitive
detection setting. A distinction must be made regarding whether the cross-section of an
acceleration opening is smaller or the same as:
– the cross-section of the last air sampling opening of a branch
– the doubled cross-section of the last air sampling opening of a branch

Air sampling openings

Pipe
shape

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 18 20 21 24 32

I 0.500.660.750.800.830.850.870.880.900.900.910.920.9

2

U 0.5

0

0.6
6

0.7
5

0.8
0

0.8
3

0.8
5

0.8
7

0.880.900.9
0

M 0.5

0

0.6
6

0.7
5

0.8
0

0.8
3

0.8
5

0.8
7

2 x U 0.5

0

0.6
6

0.7
5

0.8

0

0.8
3

0.8
5

4 x U 0.5

0

0.6

6

0.750.8
0

Table4.2: Factors for increasing the sensitivity (acceleration opening corresponds to one air sampling opening)

Air sampling openings

Pipe
shape

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 18 20 21 24 32

I 0.330.500.600.660.710.750.770.800.810.830.840.850.8

6

U 0.3

3

0.5
0

0.6
0

0.6
6

0.7
1

0.7
5

0.7
7

0.800.810.8
3

M 0.3

3

0.5
0

0.6
0

0.6
6

0.7
1

0.7
5

0.7
7

2 x U 0.3

3

0.5
0

0.6
0

0.6

6

0.7
1

0.7
5

4 x U 0.3

3

0.5

0

0.600.6
6

Table4.3: Factors for increasing the sensitivity (acceleration opening corresponds to two air sampling openings)

Example:
A class B double U-pipe system with 24 air sampling openings is planned. According to EN
54‑20 or ISO 7240-20 , 24 openings are permitted in class B at a sensitivity of 0.25% LT/m. In
order to increase the transport time, an acceleration opening the same size as the last air
sampling opening is to be used.According to 1. Option: increasing the sensitivity, page 60, the
necessary sensitivity of the detector module in this case is 0.25 % LT/m * 0.85 = 0.1875 % LT/
m.

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2. Option: reducing the number of air sampling openings

Reduced sensitivity at the air sampling openings can be offset by reducing the number of air
sampling openings. A distinction must be made regarding whether the cross-section of an
acceleration opening is smaller or the same as:
– the cross-section of the last air sampling opening of a branch
– the doubled cross-section of the last air sampling opening of a branch

Air sampling openings

Pipe shape 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 18 20 21 24 32

I 1 2 3 4 5 6 7 8 9 10 11 12

U 2 4 6 8 10 12 14 16 18

M 3 6 9 12 15 18

Double U 4 8 12 16 20

Quadruple
U

8 16 24

Table4.4: Reducing the number of air sampling openings (acceleration opening corresponds to one air sampling opening)

Air sampling openings

Pipe shape 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 18 20 21 24 32

I 1 1 2 3 4 5 6 7 8 9 10 11

U 2 2 4 6 8 10 12 14 16

M 3 3 6 9 12 15

Double U 4 4 8 12 16

Quadruple
U

8 8 16

Table4.5: Reducing the number of air sampling openings (acceleration opening corresponds to two air sampling openings)

Example:
A class B double U-pipe system with 24 air sampling openings is planned. According to EN
54‑20 and ISO 7240-20, 24 openings are permitted in class B at a sensitivity of 0.25% LT/m. In
order to increase the transport time, an acceleration opening twice the size as the last air
sampling opening is to be used. According to 2. Option: reducing the number of air sampling
openings, page 61, 16 air sampling openings are permitted in this case at a sensitivity of

0.25% LT/m.
It may be necessary to increase the system's transport time in order to meet individual
requirements. For this purpose, acceleration apertures can be planned at the end of the pipe
branch, which will increase the transport rate.
For the design of pipe systems with acceleration apertures, please refer to the following table
for aspiration holes and particular pipe configuration. Furthermore compliance is required
with special design tables for the design of smoke aspiration systems with acceleration
apertures

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Notice!

Type and source of hazard
Due to physical properties, the detection of pipe rupture is derated when using pipe systems
with acceleration apertures.

I-Pipe

FAS/FCS

* acceleration aperture

Number of apertures

1 2 3 4 5 6 7 8 9 10

Sampling aperture type Ax-x.x

A 7.0 7.0 7.0 3.2 3.0 2.5 2.0 2.0 2.0 2.0

B a 7.0 7.0 7.0 3.8 3.0 2.5 2.0 2.0 2.0

C - a 7.0 7.0 6.0 3.6 3.0 2.5 2.0 2.0

D - - a 7.0 7.0 5.6 3.6 3.0 2.5 2.0

E - - - a 7.0 7.0 5.2 3.6 3.0 2.5

F - - - - a 7.0 7.0 5.2 3.6 3.2

G - - - - - a 7.0 7.0 4.4 3.4

H - - - - - - a 7.0 7.0 4.0

I - - - - - - - a 7.0 7.0

J - - - - - - - - a 7.0

K - - - - - - - - - a

L - - - - - - - - - -

M - - - - - - - - - -

N - - - - - - - - - -

O - - - - - - - - - -

P - - - - - - - - - -

Q - - - - - - - - - -

R - - - - - - - - - -

S - - - - - - - - - -

T - - - - - - - - - -

U - - - - - - - - - -

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a = Acceleration openings = 7.0 mm

Number of apertures

11 12 13 14 15 16 17 18 19 20

Sampling aperture type Ax-x.x

A 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0

B 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0

C 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0

D 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0

E 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0

F 2.5 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0

G 3.0 2.5 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0

H 3.4 3.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0

I 3.6 3.2 2.5 2.0 2.0 2.0 2.0 2.0 2.0 2.0

J 7.0- 3.6 3.4 2.5 2.5 2.0 2.0 2.0 2.0 2.0

K 7.0 6.8 3.6 3.2 2.5 2.0 2.0 2.0 2.0 2.0

L a 7.0 6.8 3.2 3.4 2.5 2.0 2.0 2.0 2.0

M - a 7.0 6.8 3.6 3.2 2.5 2.0 2.0 2.0

N - - a 7.0 6.0 3.6 3.0 2.5 2.0 2.0

O - - - a 7.0 6.0 3.4 3.0 2.5 2.0

P - - - - a 7.0 6.0 3.4 3.0 2.5

Q - - - - - a 7.0 5.6 3.4 2.5

R - - - - - - a 7.0 5.2 3.4

S - - - - - - - a 7.0 5.0

T - - - - - - - - a 7.0

U - - - - - - - - - a

a = Acceleration openings = 7.0 mm

U-Pipe

FAS/FCS

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* acceleration aperture

Number of apertures

2 4 6 8 10 12 14 16 18 20

Sampling aperture type Ax-x.x

A 7.0 7.0 6.8 4.6 3.0 2.5 2.5 2.0 2.0 2.0

B a 7.0 7.0 5.0 3.6 2.5 2.5 2.5 2.5 2.5

C - a 7.0 7.0 5.0 3.0 3.0 2.5 2.5 2.5

D - - a 7.0 7.0 5.0 3.0 3.0 2.5 2.5

E - - - a 7.0 7.0 4.0 3.0 3.4 2.5

F - - - - a 7.0 7.0 3.6 3.4 2.5

G - - - - - a 7.0 7.0 4.0 3.0

H - - - - - - a 7.0 6.0 4.0

I - - - - - - - a 7.0 6.0

J - - - - - - - - a 7.0

K - - - - - - - - - a

L - - - - - - - - - -

M - - - - - - - - - -

N - - - - - - - - - -

O - - - - - - - - - -

P - - - - - - - - - -

Q - - - - - - - - - -

R - - - - - - - - - -

S - - - - - - - - - -

T - - - - - - - - - -

U - - - - - - - - - -

a = Acceleration openings = 7.0 mm

Number of apertures

22 24 26 28 30 32 34 36 38 40

Sampling aperture type Ax-x.x

A 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0

B 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0

C 2.5 2.5 2.5 2.5 2.0 2.0 2.0 2.0 2.0 2.0

D 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.0

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E 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.0

F 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5

G 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5

H 3.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5

I 4.0 3.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5

J 5.6 4.0 3.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5

K 7.0 5.2 4.0 3.0 2.5 2.5 2.5 2.5 2.5 2.5

L a 7.0 5.0 4.0 3.0 2.5 2.5 2.5 2.5 2.5

M - a 7.0 5.0 4.0 3.0 2.5 2.5 2.5 2.5

N - - a 7.0 5.0 4.0 3.0 2.5 2.5 2.5

O - - - a 7.0 5.0 4.0 3.0 2.5 2.5

P - - - - a 7.0 5.0 4.0 3.2 2.5

Q - - - - - a 7.0 5.0 4.0 3.2

R - - - - - - a 7.0 5.0 4.0

S - - - - - - - a 7.0 5.0

T - - - - - - - - a 7.0

U - - - - - - - - - a

a = Acceleration openings = 7.0 mm

M-Pipe

FAS/FCS

* acceleration aperture

Number of apertures

3 6 9 12 15 18 21 24 27 30 33

Sampling aperture type Ax-x.x

A 7.0 7.0 6.8 4.6 3.0 2.5 2.5 2.0 2.0 2.0 2.0

B a 7.0 7.0 5.0 3.4 2.5 2.5 2.5 2.5 2.5 2.0

C - a 7.0 7.0 5.0 3.6 3.0 2.5 2.5 2.5 2.5

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D - - a 7.0 7.0 4.6 3.4 3.0 2.5 2.5 2.5

E - - - a 7.0 7.0 4.0 3.2 3.4 2.5 2.5

F - - - - a 7.0 6.8 3.6 3.4 2.5 2.5

G - - - - - a 7.0 6.8 3.6 3.2 2.5

H - - - - - - a 7.0 6.0 3.6 3.4

I - - - - - - - a 7.0 6.0 3.6

J - - - - - - - - a 7.0 5.6

K - - - - - - - - - a 7.0

L - - - - - - - - - - a

M - - - - - - - - - -

N - - - - - - - - - -

O - - - - - - - - - -

P - - - - - - - - - -

Q - - - - - - - - - -

R - - - - - - - - - -

S - - - - - - - - - -

T - - - - - - - - - -

U - - - - - - - - - -

V

a = Acceleration openings = 7.0 mm

Number of apertures

36 39 42 45 48 51 54 57 60 63

Sampling aperture type Ax-x.x

A 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0

B 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0

C 2.5 2.5 2.5 2.0 2.0 2.0 2.0 2.0 2.0 2.0

D 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.0 2.0

E 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.0 2.0

F 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.0

G 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.0

H 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5

I 3.4 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5

J 3.6 3.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5

K 5.0 3.5 3.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5

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L 7.0 4.6 3.6 3.0 2.5 2.5 2.5 2.5 2.5 2.5

M a 7.0 4.0 3.6 2.5 2.5 2.5 2.5 2.5 2.5

N - a 7.0 4.0 3.0 3.0 3.0 2.5 2.5 2.5

O - - a 7.0 3.6 3.6 4.0 2.5 2.5 2.5

P - - - - 7.0 3.6 5.0 2.5 2.5 2.5

Q - - - - a 6.0 7.0 2.5 2.5 2.5

R - - - - - a a 3.0 2.5 2.5

S - - - - - - - 6.0 3.0 2.5

T - - - - - - - a 6.0 3.0

U - - - - - - - - a 6.0

V a

a = Acceleration openings = 7.0 mm

Double-U-Pipe

FAS/FCS

* acceleration aperture

Number of apertures

4 8 12 16 20 24 28 32 36 40 44 48 52

Sampling aperture type Ax-x.x

A 7.0 7.0 6.8 4.6 3.0 2.5 2.5 2.0 2.0 2.0 2.0 2.0 2.0

B a 7.0 7.0 5.0 3.4 2.5 2.5 2.5 2.5 2.5 2.0 2.0 2.0

C - a 7.0 7.0 5.0 3.6 3.0 2.5 2.5 2.5 2.5 2.5 2.5

D - - a 7.0 7.0 4.6 3.4 3.0 2.5 2.5 2.5 2.5 2.5

E - - - a 7.0 7.0 4.0 3.2 3.4 2.5 2.5 2.5 2.5

F - - - - a 7.0 6.8 3.6 3.4 2.5 2.5 2.5 2.5

G - - - - - a 7.0 6.8 3.6 3.2 2.5 2.5 2.5

H - - - - - - a 7.0 6.0 3.6 3.4 2.5 2.5

I - - - - - - - a 7.0 6.0 3.6 3.4 2.5

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J - - - - - - - - a 7.0 5.6 3.6 3.0

K - - - - - - - - - a 7.0 5.0 3.6

L - - - - - - - - - - a 7.0 4.6

M - - - - - - - - - - a 7.0

N - - - - - - - - - - - - a

O - - - - - - - - - - - - -

P - - - - - - - - - - - - -

Q - - - - - - - - - - - - -

R - - - - - - - - - - - - -

S - - - - - - - - - - - - -

T - - - - - - - - - - - - -

U - - - - - - - - - - - - -

V - - - - - - - - - - - - -

W - - - - - - - - - - - - -

X - - - - - - - - - - - - -

Y - - - - - - - - - - - - -

Z - - - - - - - - - - - - -

a = Acceleration openings = 7.0 mm

Number of apertures

56 60 64 68 72 76 80 84 88 92 96 100

Sampling aperture type Ax-x.x

A 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0

B 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0

C 2.5 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0

D 2.5 2.5 2.5 2.5 2.5 2.5 2.0 2.0 2.0 2.0 2.0 2.0

E 2.5 2.5 2.5 2.5 2.5 2.5 2.0 2.0 2.0 2.0 2.0 2.0

F 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.0 2.0 2.0 2.0 2.0

G 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.0 2.0 2.0 2.0 2.0

H 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.0 2.0 2.0 2.0

I 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.0 2.0 2.0 2.0

J 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.0 2.0 2.0

K 3.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.0 2.0 2.0

L 3.6 3.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.0 2.0

M 4.0 3.6 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.0 2.0

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N 7.0 3.6 3.0 3.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.0

O a 7.0 3.6 3.6 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.0

P - a 7.0 3.6 3.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5

Q - - a 6.0 3.6 2.5 2.5 2.5 2.5 2.5 2.5 2.5

R - - - a 6.0 3.0 2.5 2.5 2.5 2.5 2.5 2.5

S - - - - a 6.0 3.0 2.5 2.5 2.5 2.5 2.5

T - - - - - a 6.0 3.0 2.5 2.5 2.5 2.5

U - - - - - - a 6.0 3.0 2.5 2.5 2.5

V - - - - - - - a 6.0 3.0 2.5 2.5

W - - - - - - - - a 6.0 3.0 2.5

X - - - - - - - - - a 6.0 3.0

Y - - - - - - - - - - a 6.0

Z - - - - - - - - - - - a

a = Acceleration openings = 7.0 mm

See also

– 2. Option: reducing the number of air sampling openings, page 61

4.11 Planning for Forced Airflow

Monitoring the air-conditioning ducts

Air-conditioning units are broken down into low and high-speed units (see table below). The
details provided in this chapter apply only to low-speed units. There are no adequate empirical
values available for high-speed units. Hence, smoke trials must be executed for air­conditioning ducts with flow speeds above 10m/s, in order to determine optimal response
behavior.

Air­conditioning
ducts

Low-speed units High-speed units

Flow speed Maximum 6 to 10 m/s > 10m/s

Duct cross-section Large Small

Difference pressures
along the flow
direction

Low High

The speed distribution in an air-conditioning duct appears as follows:

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1

v

1

v

1 > v2 > v3 > v4

v

2

v

3

v

4

Speed distribution in an air-conditioning duct

1 Air-conditioning duct

V1-V4Flow speed

Aspiration

To achieve optimal detection results, the pipe system should be organized into the areas v

1

tov

3

Installation location of the pipe system

The exhaust duct should be selected as the installation location of the pipe system, as far as
possible away from the sound dampers, air baffles and bends. The distance from obstacles of
this kind should be at least three times the smallest duct diameter.
If it is absolutely essential to install the pipe system directly behind air baffles, sound dampers
or bends; the main speed ranges must be monitored (see Installation location of the pipe
system , page 70/Installation location of the pipe system , page 70).

3 x d

min

1

2 3

Direction change of the duct without air baffles

1 Main speed range

2 Exceptional arrangement of

the pipe system (if distance
of 3xd

min

cannot be

observed)

3 Typical pipe system

arrangement

d

min

Smallest duct diameter

1

2 3

4 5

Sound dampers in a duct

1 Smoke aspiration pipe

2 Air-conditioning duct

3 Main speed range

4 Sound dampers

5 Bore

When installing a pipe system in air-conditioning ducts, the following must be observed:
– Since the FCS-320 and the pipe system are located in different pressure ranges, an air

return pipe (see Installation location of the pipe system , page 70) must be provided.
– The pipe entries into the duct must be airtight.
– The portion of the pipe system that is outside the duct must be sealed airtight.

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1

1

5

2

2

i

123456789

10

4

3

3

F

v

1

v

2

v

3

v

4

A

FAS / FCS

FAS / FCS

5

1/2 b

b

2

FAS-420

-

TM

se

ries

A

B

Air-return pipe

F Front view

A Plan view

1 Air-conditioning duct

2 Duct adapter

3 Airflow

4 Aspiration

5 Air-return pipe

b Width of air-conditioning

duct

v1-v4Flow speed

Air-return pipe

The air-return pipe must be positioned at a distance of at least 2m from the aspiration. The
open end of the return is sloped at a 45° angle.

1

i

123456789

10

v

1

v

2

v

3

v

4

FAS / FCS

2

2

≥ 200 mm

3

A

B

Offset arrangement of the air return

1 Air-conditioning duct

2 Duct adapter

3 Airflow

A Aspiration in area v1

B Return in area v3

v1 tov4Flow speed

If the distance of 2m cannot be adhered to, the pipes must be arranged offset. This way, a
pressure fall between intake and exhaust can be achieved since the pipes are located in
different speed ranges.
The distance of the air sampling openings to one another and to the duct wall is represented
in the following table.

Bore distances Duct cross-

section ≤0.5m²

Duct cross­section >0.5m²

Distance of the air sampling openings
to the wall

100 to 200mm 200 to 300mm

Distance of the air sampling openings
to one another

100mm 150mm

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Diameter of the air sampling openings

The diameter of the air sampling openings is derived from the number of air sampling
openings. The precise value can be obtained from Simplified pipe planning.
The pipe is closed with an end cap without bore hole.

Arrangement

The air sampling openings must face the airflow.
Note when planning that the air-conditioning ducts are often only accessible from two sides
for installation of the pipe system.

Example

The figure below shows two planning examples of pipe systems in air-conditioning ducts.

FAS / FCSFAS / FCS

A ≤ 0,5 m

2

A > 0,5 m

2

a

100

100

200

150

b

1/2 b

b

1/2 b

a

Ducts with small and large duct cross-sections

A Cross-sectional area of

duct (with A=axb)

a Height of air-conditioning

duct

b Width of air-conditioning

duct

4.12 Project planning with branch pipes

Project planning with branch pipe are suitable for sampling points which are located distantly
from the main run of the pipe system.

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A

B

X

Y

I

krit.

I

S

ti

c

h

A

I

Stich

B

I

S

t

i

c

h X

I

Stich Y

... .... ..

FAS / FCS

B

X

Y

I

krit.

... .... ..

A

C E

D

X

Y

I

krit.

... .... ..

D

A B

C

X

Y

I

krit.

... .... ..

D

A B

C

E

FAS / FCS

FAS / FCS

FAS / FCS

The branch pipes must be projected in accordance to the figure (project planning with branch
pipes). The project planning of I-pipe described in the figure must be copied to every single
sampling branch of other pipe forms (U, M, double-U pipe system).
Referring to the project planning with burs please notice that the “critical length” (lkrit.) of a
project planning does not exceed the maximum total length of pipe respectively of branch
(referring to U, M, double-U pipe system). The critical length described the sampling point
which is located most distantly from FCS-320.
Two aspiration apertures in total can be projected on each branch pipes at which the minimal
and maximum distance between the aspiration apertures must be respected.

Opening diameter

The opening diameters are valid for the projected aspiration apertures in accordance with the
chapter „Opening diameter for standard project planning“.

FAS / FCS

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Distances of apertures

The distance between the T-piece and the following branch pipe as well as the pipe length
between aspiration apertures on the branch pipes must not exceed 12 m in total.

FAS / FCS

Maximum length of branch pipe

The length of pipe between the last T-piece and the last aspiration apertures is the length of
branch pipe. All other branch pipes need to be shorter. Two aspiration apertures in total can
be projected on each branch pipe.
If the maximum distance is exceeded a correction by an additional aspiration aperture on a
branch pipe can be done. In this connection please notice that two aspiration apertures in
total can be projected on each branch pipe.

4.13 Planning with air sampling hose

The application of air sampling hose FAS-ASD-PHF16, PG16 can be useful if several direction
changes on a short distance of a pipe system is required, e. g. for avoiding any obstacles.
As the transport time can be manipulated negatively by application of an air sampling hose,
the influence of the used air sampling hose is to be deter-mined on the allowed total length of
pipe as follows.

Consideration during application of air sampling hose:

For calculation the maximum length of air sampling pipe with air sampling hose, the length of
the air sampling hose must be multiplied by the certain factor b and deducted from the
allowed total length of pipe.

Air sampling pipe length = Total pipe length – (Length of the air sampling hose * factor b)

Factor for calculation of the air sampling hoses length:

Fan voltage Factor b

6,5 V 0,9

6,9 V 0,6

≥ 9 V 0,7

Example 1: Altogether, the air sampling hose of type FAS-ASD-PHF16 with a length of 22 m
shall be connected to a FAS/FCS aspirating smoke detector with a fan voltage of 6.9 V. The
allowed total length of pipe is 120 m. The result for the maximum air sampling pipe inclusive
air sampling hose is:

Air sampling pipe length = 120 m – (22 m * 0.6) = 106.8 m.

Example 2: In case of a pipe project planning, 100 m of air sampling pipe and air sampling
hose shall be connected to a FAS/FCS aspirating smoke detector with a fan voltage of 6.5 V. In
accordance to the project planning scale, the allowed total length of pipe can be 120 m for the

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complete pipe project planning. The result for the maximum length of the complete air
sampling hose of type FAS-ASD-PHF16, which can be integrated within the pipe project
planning, after formula adjustment is:

Length of the air sampling hose = (Total pipe length – Air sampling pipe length) / 1.1
Length of the air sampling hose = (50 – 45 m) / 0.9 = 5,55 m

Notice!

The complete air sampling pipe must not consist of a single air sampling hose. Aspiration
reduction must not put about the air sampling hose.

4.14 Planning with air return

In some cases, in which differences of air pressure between the area of air sampling device
and the area of air sampling point exist, a channel of air pressure of the aspirated test air in
the pressure area of air sampling points can be necessary. Therefore, an air sampling hose
with a right length should be connected on the air outlet of the air sampling device.
As the transport time of an air sampling smoke detection device can be manipulated
negatively by an air return, the influence of the air return to the al-lowed total length of pipe is
to be respected.
An air return with a pipe with Ø 40 mm has no influence and can be projected and/or
retrofitted without reducing the total pipe length and / or retrofitted.

Consideration of air returns:

For calculation the maximum length of air sampling pipe, the length of the air return must be
multiplied by the certain factor a) and deducted from the allowed total length of pipe.

Air sampling pipe length = Total pipe length – (Length of the air return * Factor a)

Factors to calculate the lengths of air return (∅ 25 mm):

Length of the air return Factor a

0 – 5 m 0.0

> 5 – 10 m 1.6

> 10 – 25 m 3.2

Factors to calculate the lengths of air return (∅ 32 mm):

Length of the air return Factor a

0 – 5 m 0.0

> 5 – 10 m 0.0

> 10 – 25 m 1.0

Example: An air return (∅ 25 mm) from 10 m to be connected to a FAS/FCS. The allowed total
length of pipe is 50 m. The result for the maximum air sampling pipe is:

Air sampling pipe length = 50 m – (10 m * 1.6) = 48.4 m)

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4.15 Power Supply

To measure the power supply, the detector-ready state of the security system and the alarm
case are regarded. When the system is ready to detect, the power supply must provide the
standby current for the aspirating smoke detectors and ensure the emergency power
rechargeable battery is charged in accordance with DINVDE0833, part1 (80% charged in
24hrs).
The current in the event of an alarm is calculated according to the following formula:

Calculation of current for space protection

I I II

g

A

n

max

Q PS

=

.

n

max

+

.

(n

_

)

max

Equipment protection

I I II

g A

n

Q

PS

=

.

+

.

(n

_

)

max

n

Charging current

The power for charging the rechargeable battery is calculated with the following formula:

n

=

.

L

0,8

K

24

I

I I I

g

Q PS

=

n

+

max

.

I

L

where

Ig = Total current of all connected aspirating smoke detectors in [A]

IA = Alarm current of an aspirating smoke detector in [A]

IQ = Standby current of an aspirating smoke detector in [A]

IPSmax = Max. power supply of the network power supply in [A]

IL = Charging current of the rechargeable batteries (80% of the nominal

capacity within 24hours) in [A]

Kn = Rated capacity of the rechargeable battery in [Ah]

n = Total number of connected aspirating smoke detectors

nmax = The highest number of aspirating smoke detectors in one detection zone

The power supply can service detectors from several detection ranges, e.g.:
– 1 x FCS-320 in detection zone 1
– 2 x FCS-320 in detection zone 2
– 4 x FCS-320 in detection zone 3
– 1 x FCS-320 in detection zone 4 etc.
In the example, the zone with the highest energy requirement is zone 3 and hence n

max

=4. For
equipment protection, it is assumed that max. √n detectors can trigger an alarm at the same
time.

Notice!

The power supply units are laid out using the calculated total current Ig with the highest
value.

Please refer to Technical Specifications for the current consumption of the FCS-320.

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Line calculation

The maximum line length is derived from the permissible voltage drop on the supply line. The
permissible voltage drop is the difference between the end-point voltage of the backup
battery (21.5V) and the lower operating voltage limits of the aspirating smoke detectors.

I

g

max

=

. .

γ

L

∆

U

.

A

2

where

Lmax = Maximum line length in [m]

A = Strand cross-section in [mm²]

Ig = Total current of all connected aspirating smoke detectors in [A]

γ = Conductivity: Cu=57m/Ωmm²

ΔU = Charging current of the rechargeable batteries (80% of the nominal

capacity within 24hours) in [A]

To guarantee the impermeability of the housing, the corresponding cable bushing must be
selected for the existing cable:
– M25 cable bushing: ∅9-14mm
– M20 cable bushing: ∅8-12mm
The "Fire Alarm System Planning Software" enables case-specific calculations to be carried out
for planning the FPA-5000 Modular Fire Panel.

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5 Installing the Aspirating Smoke Detector

5.1 General

The regulations, guidelines and provisions described in Regulations apply.
The following must be observed when installing the FCS-320 Aspirating Smoke Detector:
– Do not interfere with, modify or convert the equipment. If adjustments cannot be

avoided, consult with the operator, the unit manufacturer and/or the supply company.

– All changes to the house mains (230V/400V supply) and to third-party systems must be

executed by the builder. This includes e.g.
– Primary connection of the mains charger
– Carrying out any potentially essential lightning and surge protection measures in

compliance with relevant standards

!

Warning!

Installation must only be performed by authorized and specialized personnel!
Switch off the unit before carrying out any connection work!
Do not connect or disconnect the detector module while switched on!

5.2 Installing the Detector Module

Notice!

Only DM-TP-50(80), DM-TP-10(25) and DM-TP-01(05) detector modules certified to VdS may
be used.
The detector module settings are configured via the RPS software. All DIP switches on the
detector module must be set to "OFF".
The sensitivity value is based on measurements with standard test fires (old value in
brackets).The activation threshold for the airflow malfunction is set to 20% volume flow
change by default. Higher values are not permitted within EN54‑20 or ISO 7240-20.

1

2

5

6

3

4

FAS-420

series

HEAD1 DIAG HEAD2 DISPLAY

Installing the Detector Module

Caution!

Electrostatic discharge (ESD)! This can damage electronic
components. Ground yourself using a wrist strap or take other suitable measures.

Proceed as follows to install the detector module:
– Open the unit by carefully unlocking the housing cover's quick locks.

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– Carefully pull the display board connection cable from the motherboard ("DISPLAY"

connection) and remove the housing cover. Once the unit is installed, fix the cover with a
service clip.

Notice!

FCS-320-TP2 and FCS-320-TT2 variants:
These unit types are factory prepared for the installation of two detector modules:
The fan covers for both aspiration pipes are removed.
The two pipe system connections are cut out.
The pin pair on jumper BR1 is open (see Number of Detector Modules).

– Spread the brackets provided for fixing the detector module slightly apart.
– Carefully insert the detector module until you hear it click into place. Make sure that the

used detector module is fixed tightly and securely by the bracket by additionally pushing
together the brackets by hand.

– Connect detector module 1 to the "HEAD1" connection on the motherboard using the

flatband cable. FCS-320-TP2 and FCS-320-TT2 variants: Connect detector module 2 to the
"HEAD2" connection on the motherboard using the flatband cable.

– Reconnect the display board cable to the "DISPLAY" connection on the motherboard.

5.3 Settings on the Unit Motherboard

21

2
U
J

3

2UJ

21

3
U
J

3

3UJ

HEAD 1 HEAD 2DIAG DISPLAY

X5

2 1

2UJ

3UJ

2 31

2UJ

2 31

X1 X2 X3 X4

JU4

1 2

JU1

JU1

1 2

4UJ

JU4

6X

7X

Figure5.1: Settings on the motherboard

5.3.1 Setting the Fan Voltage

The standard fan voltage setting is 6.9V. In critical applications, the fan voltage may be
switched to 9V. This increases the transport speed in the pipe system, thus achieving faster
detection with longer pipe lengths.
To switch to 9V, pull out jumper JU1.

Fan voltage Jumper JU1, pin no. 1+2

6.9V X

9V O

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X = pin pair bypassedO = pin pair open

!

Caution!

Re-initialize the airflow if you switch the fan voltage. Close or open the jumper JU1 only when
the device is switched off.

See also

– , page 79
– , page 79

5.3.2 Number of Detector Modules

The number of populated detector modules is factory set in line with the model variant
(jumper JU4 on the unit's motherboard; see , page 79).

Variant Number of detector modules Jumper JU4, pin no. 1+2

FCS-320-TP1/FCS-320-TT1 1 detector module X

FCS-320-TP2/FCS-320-TT2 2 detector modules O

X = pin pair bypassed O = pin pair open

5.4 Installing the Unit

Notice!

When selecting the installation location, it must be ensured that the unit displays are easily
visible.
Remember when planning that the unit fans generate a noise level of approx.45dB(A).
The installation location may not be in any door opening area.

≥ 10 cm

≥ 10 cm

A

1

2

B

FAS-420 series

FAS-420 series

Installation of the FCS-320

A Aspiration device

upwards

B Aspiration device

downwards with air
outlet opening upwards

1 Smoke aspiration pipe

2 Air-return pipe

The air outlet on the unit must not be obstructed. There must be a free area of 10cm in front
of the air outlet.
The aspirating smoke detector can be installed with the aspiration device pointing upwards or
downwards. Rotate the cover through 180° in the required direction.

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Aspiration from below

If the air-return pipe is directed upwards, it must be guaranteed that no foreign bodies or
dripping water can penetrate the air return. You should therefore use a short, downward
angled pipe.

Mounting type MT-1

The aspirating smoke detector is either bolted directly to the wall provided for installation
using the rear panel or installed by means of unit mounting type MT-1, e.g. onto frames.

1

2

FAS

-420 series

FAS-420

series

Installing on mounting type MT-1

1 Horizontal installation

2 Vertical installation

Installation material FCS-320 Cylinder or flat head screws

– Thread diameter: max. 6mm
– Head diameter: 10mm

Mounting (type MT-1) Cylinder or flat head screws

– Thread diameter: max. 4mm
– Head diameter: 5 to 7mm

Bore distances
The distances between the bores are shown in the figures below (all measurements in mm).

30

255

160

200

292

Figure5.2: Bore distances of FCS-320 without mounting

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90 30

36

53

92

4,5

30

28,5

33,5

4

360

320

210

260

285

205

42

8,4∅

330

420

432

170

150

Figure5.3: Bore distances with mounting type MT-1

Reducing operating noises

If the aspirating smoke detector is installed in noise-sensitive areas, observe the instructions
in Measures for Reducing Operating Noise.

Installation

– First, clearly mark the fixing points on the installation position provided on the

equipment. Use the supplied drilling jig as an aid. To guarantee a safe and low-vibration

hold, the unit must be secured with four screws.
– Using four screws appropriate for the installation method, attach the unit securely to the

surface or to the unit mounting. Ensure that the unit is not fixed under mechanical stress

and that the screws are not tightened too tightly, otherwise damage or undesirable

resonance noises could occur. To equalize unevenness and/or prevent vibrations,

vibration absorbers (subject to separate order) must be used.

Connecting the aspiration pipe

– To connect the aspiration pipe to the FCS-320, insert it into the pipe connection

provided.

1

FAS-420 series

Connecting the aspiration pipe to the FCS-320 Aspirating
Smoke Detector

1 Smoke aspiration pipe

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Notice!

Do not use glue to connect the aspiration pipe and pipe connection.
In the event of sharp temperature fluctuations, the pipe must be fixed immediately in front of
the unit so that the pipe does not pull out of the pipe connection when the length changes
(see Length Change of the Pipe System).

5.5 Installing the Reset Board

5.5.1 Installing the reset board

The reset board is optionally available for use with the FCS-320 series. If several FCS-320
units are connected to one detector line, the reset board is installed in the detector line after
the last FCS-320 unit. The reset board electrically connected in accordance with the wiring
diagram.

Notice!

The reset board can be used only if the standby current of the detector line is between 5 mA
and 50 mA and the detector line terminates with a resistor.

Standby current of the line

Calculate the standby current IR of the line as follows:

E

L

R

R

U

I =

where
RE = original terminal resistance of the line [Ohm]UL = Line voltage [V]IR = Standby current of
the line [A]The equations used to calculate the terminal resistance and the standby current of
the detector line are based on an ideal condition for signal evaluation.If acknowledgement
does not take place with the calculated terminal resistance for the relay board, reduce the
value of the terminal resistance by approx. 20%.

Terminal resistance

The reset board simulates the detector line terminal resistance. It is calculated anew and
installed on the reset board (Terminal X1). Calculate the value of the terminal resistance RER as
follows:

( )

R

L

ER

I

R−=

U

2,7 V

where
RER = Terminal resistance on the reset board [Ohms]UL = Line voltage [V]IR = Standby current
of the line [A]

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5.5.2 Installing the reset board

X1

X2

– Carefully unlock the quick-release fasteners on the housing using a slotted-head

screwdriver, by simultaneously pressing on the closure latches on one side. Then lift the

housing cover off carefully.
– Unplug the display board cable from the motherboard and remove the housing

cover.Place the calculated terminal resistor 1 RER into connection terminal X1.Fasten the

reset board with the plastic spacers to the FCS-320-IK installation kit. Mount the

installation kit with the attached reset board at the position marked in the FCS-320

housing. Electrical connection (X2) is described in Electrical connection of the reset board,

page 85. Reattach the display board cable to the motherboard and refit the housing

cover. Resecure the cover by engaging the quick-release latches.

See also

– Electrical connection of the reset board, page 85

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5.5.3 Electrical connection of the reset board

L4 +

+24V

0V

R

E

R

X6

7

8

6

5

4

3

2

1

_

+

9

_

+

_

+

L1 +

R

_

+

_

+
_

+
_

+

X7

_

+

X6

2

1

3

4

5

6

7

8

9

5

4

6

7

8

9

3

2

1

R

L2 -

L2 +

7

8

6

5

4

3

2

1

9

X7

R

1

2

3

4

5

6

R

ER

1)

- Ub

+ Ub

+

-

1

2

3

4

5

6

R

ER

1)

- Ub

+ Ub

+

-

L3 +

L3 -

L4 -

E

R

L1 -

FCA-32

0-Reset

FCA

-320-Reset

FCS-320-TP/TT

FCS-320-TP/TT

5.6 Connection to the Fire Panel

5.6.1 Electrical Connection

!

Caution!

Switch off the unit before carrying out any connection work!

Proceed as follows to prepare the electrical connections:
– Using a screwdriver, carefully punch out the required cable entry points of the housing

(max. 5 x M20 and 2 x M25).

– Fit the cable entry point(s) as required with M20 or M25 connections by pushing them

into the cable entries. 2xM25 and 1xM20 are supplied in the pack.

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1. Punch out the cable entries using a sharp object.

Caution: Do not cut the cable entries with a knife!
– Route the connection cable(s) (max. 2.5mm2) through the prepared M20 or M25

connections and into the unit. Now cut these to the required length inside the unit.
– Wire the unit according to the connection information described below.

Terminal Terminal block X6 Function

1 Al 1 NO contact for 1st alarm relay

2 C contact for 1st alarm relay

3 NC contact for 1st alarm relay

4 + Ext. Displ.1 Remote indicator for 1st detector module

5 - Ext. Displ.1

6 + Reset +24V reset input

7 - Reset 0V reset input

8 + 24V +24V power supply

9 - 24V 0V power supply

Terminal Terminal block X7

1 Fault 2 Fault contact for 2nd detector module

2

3 Al 2 NO contact for 2nd alarm relay

4 C contact for 2nd alarm relay

5 NC contact for 2nd alarm relay

6 + Ext. Displ.2 Remote indicator for 2nd detector module

7 - Ext. Displ.2

8 Fault 1 Fault contact for 1st detector module

9

Notice!

On Bosch fire panels, use RA 820 Ohm for the alarm resistor and RE 2k2 (3k9) for the terminal
resistor.

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5.6.2 FCS-320-TP1 / FCS-320-TT1 Connection to the Fire Panel

9 8 7 6 5 4 3 2 1

9 8 7 6 5 4 3 2 1

X7

X6

+

-

AL1

Stö 1

L1

+

-

24V

R

A

R

E

+

-

L2

R

E

5.6.3 FCS-320-TP2 / FCS-320-TT2 Connection to the Fire Panel

9 8 7 6 5 4 3 2 1

9 8 7 6 5 4 3 2 1

X7

X6

AL1

Stö 1

+

-

24V

Stö 2

AL2

-

+

L3

R

A

+

-

L1

R

A

R

E

+

-

L2

R

E

-

+

L4

R

E

R

E

5.7 DIP switch settings

The aspirating smoke detector parameters are set using the DIP switch on the detector
modules. The default settings are marked in bold in each case. Select all other parameters
(see tables).

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Sensitivity DIP settings

DM-TP-01(05)
DM-TT-01(05)

DM-TP10(25)
DM-TT-10(25)

DM-TP50(80)
DM-TT-50(80)

Switch 1 Switch 2

0.12%/m
(0.4%/m)

0.8%/m
(2%/m)

- on on

0.06%/m
(0.2%/m)

0.4%/m
(1%/m)

- off on

0.03%/m
(0.1%/m)

0.2%/m
(0.5%/m)

1.0%/m
(1.6%/m)

on off

0.015%/m
(0.05%/m)

0.1%/m
(0.25%/m)

0.5%/m
(0.8%/m)

off off

Alarm delay DIP settings

Switch 3 Switch 4

0 seconds off off

10 seconds on off

30 seconds off on

60 seconds on on

Activation threshold for airflow malfunction DIP settings

Switch 5 Switch 6

Low (+/- 10% volume flow change) on off

Average (+/- 20% volume flow change) off on

High (+/- 30% volume flow change) off off

Very high (+/- 50% volume flow change) on on

Airflow fault delay DIP settings

Switch 7 Switch 8

30 seconds off on

2 minutes on off

15 minutes on on

60 minutes off off

Trouble logging DIP settings LOGIC·SENS filter DIP settings

Switch 9 Switch 10

not saving off off off

saving on on on

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Notice!

The sensitivity value is based on measurements with standard test fires (old value in
brackets).
The activation threshold for the airflow malfunction is set to 20% volume flow change by
default. Higher values are not permitted within EN54‑20 or ISO 7240-20 .

5.8 Connecting an External Detector Alarm Display

A digital external detector alarm display can be connected to the FCS-320 series aspirating
smoke detectors. This is available by separate order.
Connect the remote indicator to the motherboard of the FCS-320 using the terminal strip X6.
The unit must be in a voltage-free state for this.

5.9 Data Logging

1

2

2

3

HEAD1 HEAD2 DISPLAY

DIAG

ON

1 2 3

5 6 7 84

- +

Shield

Connecting a PC via the diagnostics cable

1 USB port with

FAS‑ASD‑DIAG,
COM1/COM2 with earlier
versions

2 DIAG connection cable

3 FCS-320 motherboard

The FAS‑ASD‑DIAG Diagnostic Software is used to conduct the device tests.
The current airflow sensor data, smoke level values, various status values and the parameters
configured via the programming software can be read out locally using a laptop. This makes it
much easier to detect altered operation conditions in the event of service being carried out.
The supplied diagnostics cable connects the aspirating smoke detector ("DIAG" connection on
the motherboard) to the PC. The FAS‑ASD‑DIAG version is connected to the PC via a USB port,
earlier DIAG versions use a COM.
For details, please see the diagnostic software documentation.

5.10 Replacing a Detector Module

1

2

5

6

3

4

FAS-420

series

HEAD1 DIAG HEAD2 DISPLAY

Replacing a detector module

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!

Caution!

Switch off the unit before carrying out any connection work!
Do not connect or disconnect the detector module while switched on!

– Open the unit by carefully unlocking the housing cover's quick locks.
– Carefully pull the display board connection cable from the motherboard ("DISPLAY"

connection) and remove the housing cover. Once the unit is installed, fix the cover with a

service clip.
– Unplug the detector module’s connector cable from the motherboard.
– Spread the brackets provided for fixing the detector module slightly apart and remove the

detector module. Now spread the two brackets again. Carefully insert the new detector

module until you hear it click into place. Make sure that the used detector module is fixed

tightly and securely by the bracket by additionally pushing together the brackets by hand.
– Attach the detector module to the connection on the motherboard: detector module 1 to

"HEAD1", detector module2 to "HEAD2".
– Reconnect the display board cable to the "DISPLAY" connection on the motherboard.
Before initialization, the operating voltage must be connected again. To initialize the pipe
system, press the S2 flow-init button on the detector module.
– Close the housing cover.

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6 Installation of the Pipe System

At the very least, the pipes and fittings used for the pipe system must comply with class 1131
according to EN 61386‑1, 2004. Class 1131 requires the following of the pipe system in use:

Features Severity

Compression resistance 125N

Shock resistance 0.5kg, drop height of 100mm

Temperature range -15°C to +60°C

The pipe system must be constructed using the following pipes and the associated fittings:

Exterior diameter Internal diameter

ABS PVC*

Smoke aspiration
pipe

25mm 21.4mm 21.2mm

* PVC pipes do not correspond to the temperature range given above.
For pipe systems with long pipe feed lines (see also Planning for Long Pipe Feed Lines, page

58), you must also use the following pipes and the associated fittings:

Exterior diameter Internal diameter

ABS PVC

Smoke aspiration pipe 40mm 35mm 36.2mm

Notice!

When constructing the pipe system, observe the temperature range specified under Pipe
System, page 29 in the Technical Specifications chapter.

The pipe system must be constructed according to planning specifications and must take into
account the planning guidelines.

1. Shorten the pipes with a pipe-cutter (38mm) or a metal saw. Deburr the joints and clean
up the chips.

2. Before gluing, clean the adhesion points with the prescribed cleaning agent (Tangit) to
remove dirt and grease. Use the Tangit adhesive to glue the pipe transitions with the
appropriate fittings so that they are airtight.

Notice!

If halogen-free plastics must be used, the installation procedures may vary depending on the
selected material:
ABS is glued
Polypropylene (PP) is welded
Polyamide (PA) is pushed together and bolted.

3. Minimize pipe lengths and changes of direction. Pipe elbows have an extremely high flow
resistance. Therefore, they should only be used where they cannot be avoided for
structural engineering reasons. If necessary, reduce pipe lengths in proportion to the pipe
elbows used.

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Notice!

Pipe bends must be given preference over pipe elbows. Too many bends and pipe elbows
reduce the air speed in the aspiration pipe, thereby increasing the detection time.
As a benchmark, a pipe bend corresponds to a straight pipe length of 0.3m. An elbow
corresponds to a straight pipe length of 1.5m.

4. Fix the pipe system. It must not sag or be possible to move it. Fasten the pipes with pipe
clips without rubber inserts. The distance between the pipe clips should not exceed
80cm. At high temperatures, reduce the distance between the pipe clips to a maximum
of 30cm.

Notice!

Do not use pipe clips with rubber inserts since these do not allow length extensions and the
pipe system could thus bend or even tear.

5. Close open pipe ends with an end cap.

Notice!

On completion, test the pipe system:
For tightness
For fault-free connections
For correct planning of the air sampling openings.

6.1 Length Change of the Pipe System

Length changes (extensions and reductions) of the pipes are caused by temperature changes.
Temperature increases cause lengthening of the pipes, temperature drops cause shortening of
the pipes. The length change must be given particular consideration if the temperature of the
pipe system at the time of installation deviates from the normal operating temperature.
The length change can be calculated using the following formula:

where

ΔL = Length change in [mm]

L = Length of the pipe to be calculated in [m]

ΔT = Maximum temperature difference in [°C]

δ = Length change coefficient in [mm/m x °C]

δPVC = 0.08mm/m x °C

δABS = 0.101mm/m x °C

For example, a temperature change of 10°C on a 10m-long PVC pipe causes a length change
of 8mm.

Mounting clamps

PVC pipe clips are used as standard for installing the pipe system. These clips do not allow
any length extensions.

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1 2 3

Overview of mounting clamps

1 Standard mounting clamps for 25mm pipe

2 Plastic mounting clamps for 25mm pipe,

for length changes and temperatures of up
to ‑40°C

3 Spring steel clamp for 25mm pipe, for

high-rise warehouses and temperatures of
up to ‑40°C

6.2 Air Sampling Openings

1

36

4

45

2

Example of an aspiration boring with aspiration reducing
film sheet

1 Smoke aspiration pipe

2 Aspiration reducing film sheet

with air sampling opening

3 Marking tape for aspiration

reducing film sheet

4 Air sampling opening

5 Fire red (RAL3000)

6 Transparent

Air sampling openings

Select the structure of the air sampling opening (aspiration boring) and the position in the
pipe system according to the project specification and taking into account the planning
guidelines.

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7.0

7.0

7.0

7.0

7.0

7.0

1

1.

2

3

4

5

6

2.

3.

Applying the aspiration reducing film sheet

1 Smoke aspiration pipe

2 10mm aspiration boring

3 Aspiration reducing film

sheet

4 Marking tape for aspiration

reducing film sheet

5 Fire red stripes (RAL3000)

6 Transparent

Aspiration borings

– Bore an aspiration boring with a 10mm drill at a right angle to the pipe.

Deburr the boring carefully and remove chips.
Clean the boring area (across the entire span of the pipe) of grease and dust, e.g. with
Tangit cleaning agent.

– Select the size of the aspiration reducing film sheet according to the specifications.

Glue the aspiration reducing film sheet to the opening.

– Glue the marking tape over the aspiration reducing film sheet, in order to prevent the film

sheet from becoming detached.

Notice!

The holes of the aspiration reducing film sheet and the marking tape must be exactly over the
aspiration boring so that the opening diameter of the aspiration reducing film sheet is not
changed.
To keep the adhesive surfaces of the film sheets free of dust and grease, avoid touching
them.

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6.3 Ceiling Lead-through

1

1.

2

3

5

4

7

4.

2.

5.

3.

6

1 T-fitting

2 Hose connection for ceiling lead-through

3 Aspiration hose for ceiling lead-through

4 Ceiling lead-through nut

5 False ceiling

6 Ceiling lead-through (part)

7 Aspiration reducing film sheet

The following steps are essential for installing a ceiling lead-through:
– Before gluing, clean the adhesion points with the prescribed cleaning agent to remove

dirt and grease. Glue the hose connection to the relevant T-fitting on the aspiration pipe

using Tangit adhesive.
– Drill a Ø 13mm hole in the false ceiling for each ceiling lead-through.
– Install the ceiling lead-through by removing the nut, pushing the part with the hose nozzle

through the bore from below, then refitting and tightening the nut above the false ceiling.
– Determine the required aspiration hose and cut to length. Place the cut end of the hose

onto the hose nozzle in the ceiling lead-through and onto the hose connection on the

aspiration pipe T-fitting. If necessary, heat up the hose using a hot air blower.
– Glue the required aspiration reducing film sheet (as per the planning guidelines) onto the

ceiling lead-through.

Notice!

The hole in the aspiration reducing film sheet must be positioned exactly over the opening in
the ceiling lead-through. The opening diameter in the aspiration reducing film sheet must not
be altered.
To keep the adhesive surfaces of the film sheets free of dust and grease, avoid touching
them.

6.4 Monitoring with Forced Airflow

6.4.1 Detection at Intake and Exhaust Openings

!

Caution!

If the smoke aspiration occurs in a forced airflow (fan, air-conditioning units), direct the air
sampling openings depending on the exhaust speed in the airflow.

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1

2

3

30°

Positioning the air sampling opening depending on air
speed

1 Aspiration pipe with air

sampling openings

2 Exhaust speed <0.5m/s

3 Exhaust speed >0.5m/s

6.4.2 Detection in the Bypass

Notice!

For detection in airflows ≥ 2m/s, additionally feed the exhaust from the FCS-320 back into
the airflow area. Cut the end of the air-return pipe at an angle of 45°.

1

2

3

4

b

1/2 b

Positioning the air-return pipe – example with an air­conditioning duct (bypass)

1 Air-conditioning duct

2 Duct adapter

3 Aspiration

4 Air-return Pipe

b Width of air-conditioning duct

For details on connecting the air-return pipe, please see Air-return Pipe, page 98.
For FCS‑320 planning in these applications, see Planning for Forced Airflow, page 69.

See also

– Planning for Forced Airflow, page 69
– Air-return Pipe, page 98
– Planning for Forced Airflow, page 69

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6.5 Air Filter

6.5.1 Installing the Air Filter Box

110

90

Figure6.1: Boring distances of holes in base of FAS‑ASD‑WS air filter box

Filter box

– To use the filter box in the pipe system, use the two PG29 filter screw connections

supplied.
– Install these cable glands in precisely the same way as for the pipe adapter, for example.
– When installing the filter, note the throughflow direction, which is specified on the type

plate on the side of the lower part of the housing.
– Screw the air filter housing directly onto the wall with the lower part of the housing.

Installation material

Cylinder or flathead screws are suitable for wall mounting:
– Maximum thread diameter: 4 mm
– Head diameter: 5 to 7mm.

6.5.2 Filter Change on the Air Filter Box

1.

2.

A

B

C

FAS-420-TM

series

Changing the filter inserts (in fig.: FAS‑ASD‑FL Filterbox Large)

A Primary filter

B Coarse dust filter

C Fine dust filter

To replace the filter inserts, proceed as follows:

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2018.04 | 2.0 | F.01U.130.926 Operation Guide Bosch Sicherheitssysteme GmbH

1. Remove the four screws and remove the housing cover.

2. Remove the old filter inserts and clean the inside of the housing carefully to remove dust.
Now fit the cleaned or new filter inserts. When using the spare filter set for the large
filterbox, ensure you follow the correct sequence (see label on base of housing).
Replace the housing cover and screw it back on.

Notice!

In applications with largely fine dust build-up, three fine dust filters can also be used (subject
to separate order).

6.6 Air-return Pipe

1

FAS-420 series

1 Air-return pipe (aspiration

pipe)

Fix the air-return pipe within the air exhaust opening. No additional components are required.

!

Caution!

In the event of sharp temperature fluctuations, the pipe must be fixed immediately in front of
the unit so that the pipe does not pull out of the pipe connection due to length change (see
Length Change of the Pipe System, page 92).

Steps:

1. Remove the pre-punched pipe opening in the protective grille of the air exhaust opening
(e.g. using a small edge cutter).

2. Insert the air-return pipe through the opened pipe opening in the protective grille and fix
it to the FCS-320 with the rubber ring already integrated into the air-exhaust opening.

See also

– Length Change of the Pipe System, page 92

Aspirating Smoke Detector Installation of the Pipe System | en 99

Bosch Sicherheitssysteme GmbH Operation Guide 2018.04 | 2.0 | F.01U.130.926

6.7 Three-way Tap

A

B

C

1

2

3

4

FAS

-420 ser

ies

A

B

C

2

A

B

C

3

A

B

C

1

Installing the three-way tap

1 Blast air/compressed air

connection

2 Pipe system connection

3 Aspirating smoke detector

connection

4 Air filter (optional)

The three-way tap is required to blow out the pipe system with blast air (as a preference) or
compressed air. (Compressed air is compressed, non-purified and humid ambient air. Blast
air, on the other hand, is purified and dehumidified air. If the FCS-320 and pipe system are
located in areas with temperatures below freezing, blast air is to be used for blowing out.)
The aspirating smoke detector and the downstream pipe system accessory components (e.g.
air filter) must not and cannot be blown-out.
A check valve for relieving pressure from the pipe system must be fitted to the end of each
pipe branch. The check valve prevents damage to the air sampling openings and prevents dirt
deposits from being blown through the pipe system.
To prevent aspiration reducing film sheets in deep-freeze areas from tearing, it is advisable to
use special deep-freeze aspiration reductions. Check valve and deep-freeze aspiration
reductions are available on separate order.

Connections

Fasten the three-way tap using the transition screw connections in the pipe system.
When installing, note the assignment of the connections:
– Install the aspiration pipe system on connection C.
– Install the FCS-320 on connectionA.
– Attach the blast air supply (blast or mobile blowing-out system) to connectionB of the

three-way tap.

Notice!

A single blowing-out process can be completed within 50 seconds. If within this time the unit
is still connected to the pipe system, the malfunction message “airflow sensor module
malfunctioning” will not be evaluated. If the blowing-out process has to be repeated (steps 1
to 3), wait at least 120s.

The manual blowing-out process on the pipe system is carried out as follows:

100 en | Installation of the Pipe System Aspirating Smoke Detector

2018.04 | 2.0 | F.01U.130.926 Operation Guide Bosch Sicherheitssysteme GmbH

– Position the tap lever so that the blast air and pipe system are connected (B-C

connection).
The connection to the FCS-320 must be blocked for blowing-out!
Manually blow out the pipe system for approximately 10 seconds.

– Set the lever of the tap such that the device is not connected with the pipe system or

with the connection for the blast or compressed air supply. Wait approximately 20
seconds so that dust and dirt raised in the pipe system can settle and thus will not be
sucked through the aspirating smoke detector.

– Reconnect the blown-out pipe system to the FCS-320 within a further 10seconds by

switching over the tap accordingly (A‑C connection).

6.8 FAS‑ASD‑WS Water Separator

FAS‑ASD‑WS Water Separator

The FAS‑ASD‑WS Water Separator must be fitted at the lowest point in the pipe system
downstream of the air filter and the aspirating smoke detector (see figure below).

1

2

3

3

FAS-420

ser

ies

Installing the FAS‑ASD‑WS Water Separator in the pipe
system

1 FAS‑ASD‑WS Water

Separator

2 Pipe system connection

3 45° pipe elbow

Connection

Attach two 45° pipe elbows on both sides (not supplied as standard) in order to achieve the
optimum distance from the wall for mounting the brackets. When installing, note the correct
direction of flow (see arrow on plastic container).
Also fasten the water separator with two screws and the clamp.
To empty, open the drain valve.