Rittal DET-AC III Master User manual

Mounting, installation and operating instructions
DET
-
AC III Master
Active Extinguishing System
DK 7338.121

Original document
Rittal GmbH & Co. KG
Postfach 1662
D-35726 Herborn
Germany
Phone: [phone]
Fax: [phone]
Internet: http://www.rittal.com
E-Mail: [email protected]
© 2022
IMPORTANT! Read this document before starting any work!
This document is a mandatory part of the system and should therefore always be stored freely
accessible and for further usage.
Document identification:
Document name ---
Language en_US
Document no. 100046739
DOC ID 100153985
Approval / modification no. ES22-095
Part no. 916005
Revision 07
Version 01
Edition 11-2022
Operating Instructions / DET-AC III Master / 916005 / 11-2022 / en_US 2

Table of contents
1 Legal note....................................................................................................................... 8
2 General......................................................................................................................... 10
2.1 Overview..................................................................................................... 10
2.2 Abstract....................................................................................................... 10
2.3 Scope of delivery......................................................................................... 11
2.4 Limitations of liability................................................................................... 12
3 Safety............................................................................................................................ 14
3.1 Safety and warning notices......................................................................... 14
3.2 Warnings in instructions.............................................................................. 14
3.3 Intended use............................................................................................... 15
3.4 Safe operation............................................................................................. 16
3.5 General dangers......................................................................................... 16
3.5.1 General dangers associated with fire extinguishing systems..................... 17
3.5.2 Dangers when activating the system.......................................................... 17
3.6 Qualification of personnel........................................................................... 18
3.7 Instruction................................................................................................... 20
3.8 Personal protective equipment................................................................... 20
3.9 Operator's responsibility.............................................................................. 21
3.9.1 Owner......................................................................................................... 21
3.9.2 Owner’s obligations..................................................................................... 21
3.10 Responsibility of the Authorized Distributor................................................ 22
3.10.1 Authorized Distributor................................................................................. 22
3.10.2 Obligations of the Authorized Distributor.................................................... 22
3.11 Signage....................................................................................................... 23
3.12 Environmental protection............................................................................ 23
3.13 Behavior in the event of a fire..................................................................... 24
3.13.1 Preventive steps......................................................................................... 24
3.13.2 Steps in the event of a fire.......................................................................... 24
4 Transport and packaging............................................................................................ 25
4.1 Transport inspection.................................................................................... 25
4.2 Transport..................................................................................................... 26
Table of contents
Operating Instructions / DET-AC III Master / 916005 / 11-2022 / en_US 3

4.3 Packaging................................................................................................... 27
5 Structure, function and connections......................................................................... 28
5.1 Structure..................................................................................................... 28
5.2 Function...................................................................................................... 28
5.3 Connections................................................................................................ 30
5.3.1 Relay outputs.............................................................................................. 31
5.3.2 Door contact switch..................................................................................... 31
5.3.3 Interfaces to the Monitoring System........................................................... 32
5.3.4 Connection of external alarm device........................................................... 33
5.3.5 Connection of external fill level monitoring and triggering of external
tank............................................................................................................. 33
5.3.6 Manual call point connection....................................................................... 33
5.3.7 Power supply.............................................................................................. 34
5.3.8 USB port..................................................................................................... 34
5.3.9 Connection for networking.......................................................................... 34
6 Assembly and installation.......................................................................................... 35
6.1 Operating conditions and installation requirements.................................... 35
6.2 Installation and commissioning................................................................... 36
6.2.1 Installation instructions................................................................................ 37
6.2.2 Installation steps and functional test........................................................... 38
6.2.3 Temperature indicator................................................................................. 42
6.2.4 Language setting for display and operation................................................ 42
6.2.5 Suction pipe installation instructions........................................................... 43
6.2.6 Instructions for the use of the DET-AC III Master system with simultaneous
use of an automatic door opening "ADO"................................................... 47
6.2.7 Setting air flow calibration........................................................................... 48
6.2.8 Checking the failure and alarm function...................................................... 48
6.3 Installation and commissioning of additional electrical devices.................. 51
6.3.1 Potential-free contacts................................................................................ 52
6.3.2 External alarm devices................................................................................ 53
6.3.3 Monitoring system....................................................................................... 54
6.3.4 External fill level monitoring and external tank............................................ 54
6.3.5 Door contact / blocking............................................................................... 55
6.3.6 Combination of systems.............................................................................. 58
6.3.7 Manual call point......................................................................................... 63
Table of contents
Operating Instructions / DET-AC III Master / 916005 / 11-2022 / en_US 4

7 Alarms and failures..................................................................................................... 64
8 Display and control elements..................................................................................... 66
8.1 LED displays............................................................................................... 67
8.2 Buttons........................................................................................................ 67
8.3 Display........................................................................................................ 68
8.3.1 Message display......................................................................................... 68
8.3.2 Main menu.................................................................................................. 70
8.4 Settings and displays.................................................................................. 71
8.5 Reviewing the event memory...................................................................... 72
8.6 Air flow calibration....................................................................................... 73
8.6.1 Automatic calibration of the air flow monitoring.......................................... 74
8.6.2 Manual calibration of the air flow monitoring............................................... 75
8.6.3 Setting the integration time for the air flow monitoring (filter time).............. 76
8.7 Inside temperature...................................................................................... 77
8.8 Lamp test.................................................................................................... 77
8.9 Menu "Version information"......................................................................... 77
8.10 Revision...................................................................................................... 80
8.11 Maintenance............................................................................................... 81
8.12 Maintenance menu..................................................................................... 81
8.12.1 Extinguishing agent monitoring filter time................................................... 83
8.12.2 Battery change............................................................................................ 83
8.12.3 Battery state................................................................................................ 84
8.12.4 Measuring alarm device.............................................................................. 85
8.12.5 Inside temperature...................................................................................... 86
8.12.6 Operating hours counter............................................................................. 86
9 Messages display........................................................................................................ 88
10 Maintenance program................................................................................................. 92
10.1 Installing the maintenance program............................................................ 92
10.2 Homepage.................................................................................................. 93
10.3 Project......................................................................................................... 94
10.4 Event memory............................................................................................. 94
10.5 Firmware..................................................................................................... 94
10.6 Customer data............................................................................................ 95
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Operating Instructions / DET-AC III Master / 916005 / 11-2022 / en_US 5

10.6.1 General....................................................................................................... 95
10.6.2 Components................................................................................................ 95
10.6.3 Timeouts..................................................................................................... 96
10.6.4 Threshold values......................................................................................... 96
10.7 Operation.................................................................................................... 97
11 Maintenance................................................................................................................. 99
11.1 Regular checks by the owner...................................................................... 99
11.2 Inspection, maintenance and repairs by the Authorized Distributor.......... 100
11.2.1 Checking for proper installation................................................................ 104
11.2.2 Checking for external damage.................................................................. 104
11.2.3 Recording the WA No. / Part No. / F. No................................................... 104
11.2.4 Recording the date of the current maintenance / inspection..................... 104
11.2.5 Recording the current version................................................................... 104
11.2.6 Checking and recalibrating the air flow measured values......................... 104
11.2.7 Checking current fault messages, history since last maintenance........... 105
11.2.8 Performing a lamp test.............................................................................. 105
11.2.9 Checking the discharge nozzle for contamination.................................... 105
11.2.10 Checking the temperature indicator.......................................................... 105
11.2.11 Checking the setting of date and time....................................................... 105
11.2.12 Checking the set integration time for air flow monitoring.......................... 105
11.2.13 Checking the last battery change.............................................................. 105
11.2.14 Checking the function of the door contact switch...................................... 106
11.2.15 Checking the blocking switch.................................................................... 106
11.2.16 Checking for proper connection of the transmission................................. 106
11.2.17 Checking whether shutdown occurs......................................................... 106
11.2.18 Reading out and transferring data............................................................ 106
11.2.19 Checking the electrical connections.......................................................... 106
11.2.20 Cleaning the pipe system.......................................................................... 106
11.2.21 Changing the batteries.............................................................................. 107
11.2.22 Changing the battery "control card CPU3"................................................ 107
11.2.23 Checking the DIP switch on the control card CPU3.................................. 107
11.2.24 Checking the networking of the systems.................................................. 107
11.2.25 Changing the filter..................................................................................... 108
11.2.26 Checking for contamination in the housing............................................... 108
11.2.27 Checking loss monitoring.......................................................................... 108
Table of contents
Operating Instructions / DET-AC III Master / 916005 / 11-2022 / en_US 6

11.2.28 Power supply............................................................................................ 108
11.2.29 Cover seal................................................................................................. 109
11.2.30 Checking the total weight.......................................................................... 109
11.2.31 Testing the release.................................................................................... 109
11.2.32 Changing fire detectors............................................................................. 109
11.2.33 Changing the tank..................................................................................... 110
11.2.34 Concluding the inspection......................................................................... 110
11.3 Repairs after a release.............................................................................. 110
11.3.1 Safety instructions for the tank change..................................................... 111
11.3.2 Removal.................................................................................................... 112
11.3.3 Disposal of the old tank and installation of a new tank.............................. 114
11.4 Firmware update....................................................................................... 115
12 Spare parts, accessories, consumables, and tools............................................... 116
13 Final shutdown, disassembly, and disposal........................................................... 118
13.1 Final shutdown and disassembly.............................................................. 118
13.2 Disposal..................................................................................................... 118
14 Technical data............................................................................................................ 120
15 Index........................................................................................................................... 123
Table of contents
Operating Instructions / DET-AC III Master / 916005 / 11-2022 / en_US 7

1 Legal note
Deutsch:
Produkt nur einbauen, inbetriebnehmen und
warten, wenn diese Anleitung klar verstanden
wird.
Produkt nur bedienen, wenn die nachfolgende
Anleitung klar verstanden wird.
English:
Do not install, start up and maintain the
product unless you have clearly understood
these instructions.
Do not operate the product unless you have
clearly understood the instructions below.
Français:
N'installer, ne mettre en service et n'entretenir
le produit que si les présentes instructions ont
été clairement comprises.
N'utiliser le produit que si les instructions sui-
vantes ont été clairement comprises.
Español:
Montar el producto, ponerlo en funcionamiento
y realizar el mantenimiento solo cuando se
hayan comprendido claramente estas instruc-
ciones.
Utilizar el producto solo cuando se hayan
comprendido claramente las siguientes
instrucciones.
Български:
Инсталирайте, пуснете в експлоатация и
поддържайте продукта само ако тази
инструкция е ясно разбрана.
Използвайте продукта само ако тази
инструкция е ясно разбрана.
Dansk:
Du må kun installere, idriftsætte og vedlige-
holde produktet, hvis du har forstået denne
vejledning til fulde.
Du må kun betjene produktet, hvis du har for-
stået denne vejledning til fulde.
Eesti keel:
Paigaldage toode, võtke see kasutusele ja
hooldage seda ainult siis, kui saate sellest
juhendist selgelt aru.
Kasutage toodet ainult siis, kui saate alljärgne-
vast juhendist selgelt aru.
Suomi:
Tuotteen asennus, käyttöönotto ja huolto ovat
sallittuja vain, jos tämä ohje ymmärretään sel-
västi.
Tuotetta saa käyttää vain, jos jäljempänä
oleva ohje ymmärretään selvästi.
Ελληνικά:
Η εγκατάσταση, θέση σε λειτουργία και
συντήρηση του προϊόντος επιτρέπονται μόνο
εάν οι παρούσες οδηγίες έχουν γίνει
κατανοητές.
Μην λειτουργείτε το προϊόν εάν δεν έχετε
κατανοήσει πλήρως τις παρακάτω οδηγίες.
Gaeilge:
Ná déan an táirge a shuiteáil, a thosú agus a
chothabháil mura dtuigeann tú na treoracha
seo go soiléir.
Ná oibrigh an táirge mura dtuigeann tú go soi-
léir na treoracha thíos.
Italiano:
Montare il prodotto, metterlo in funzione ed
eseguirne la manutenzione solo se si sono
comprese appieno le seguenti istruzioni.
Utilizzare il prodotto solo se si sono comprese
appieno le seguenti istruzioni.
Hrvatski:
Ugradite, puštajte u pogon i održavajte
proizvod samo ako su ove upute jasno razuml-
jive.
Koristite proizvod samo ako su sljedeće upute
jasno razumljive.
Latviešu:
Produkta iemontēšanu, ekspluatācijas sāk-
šanu un tehnisko apkopi veikt tikai tad, ja dotā
instrukcija ir pilnībā saprasta.
Produktu lietot tikai tad, ja dotā instrukcija ir
pilnībā saprasta.
Lietuvių k.:
Produktą montuokite, pradėkite jo eksploata-
ciją ir techninės priežiūros darbus vykdykite tik
tuomet, jei aiškiai suprantate šią instrukciją.
Produktą naudokite tik tuomet, jei aiškiai
suprantate šią instrukciją.
Malti:
Installa, ikkummissjona u wettaq manutenzjoni
fuq il-prodott biss jekk dawn l-istruzzjonijiet
jinftiehmu b'mod ċar.
Toperax il-prodott biss jekk l-istruzzjonijiet li
ġejjin jinftiehmu b'mod ċar.
Nederlands:
Product alleen installeren, in gebruik nemen
en onderhouden, als de volgende instructies
goed zijn begrepen.
Product alleen bedienen, als de volgende
instructies goed zijn begrepen.
Polski:
Produkt należy instalować, uruchamiać lub
konserwować tylko wtedy, gdy poniższe
instrukcje są w pełni zrozumiałe.
Produkt może być używany tylko wtedy, gdy
poniższe instrukcje są w pełni zrozumiałe.
Português:
Instalar, colocar o produto em funcionamento
e fazer a manutenção somente se as instru-
ções a seguir forem claramente compreen-
didas.
Utilizar o produto somente se as instruções a
seguir forem claramente compreendidas.
Legal note
Operating Instructions / DET-AC III Master / 916005 / 11-2022 / en_US 8

Română:
Montați produsul, puneți-l în funcțiune și între-
țineți-l numai dacă instrucțiunea următoare
este înțeleasă clar.
Utilizați produsul numai dacă instrucțiunea
următoare este înțeleasă clar.
Svenska:
Montera produkten, ta den i drift och underhåll
den endast om du förstår denna instruktion.
Betjäna produkten endast om du förstår den
efterföljande instruktionen.
Slovenčina:
Namontujte, spustite do prevádzky a udržia-
vajte výrobok iba vtedy, pokiaľ ste jasne
pochopili tento návod.
Obsluhujte výrobok iba vtedy, pokiaľ ste jasne
pochopili tento návod.
Slovenščina:
Izdelek vgradite, zaženite in vzdržujte samo,
če ste dobro razumeli navodila v nadaljevanju.
Izdelek upravljajte samo, če ste dobro razu-
meli navodila v nadaljevanju.
Čeština:
Namontujte, spusťte do provozu a udržujte
produkt pouze tehdy, když jste jasně pochopili
tento návod.
Obsluhujte produkt pouze tehdy, když jste
jasně pochopili následující návod.
Magyar:
Csak akkor építse be a terméket és végezzen
karbantartást, ha a következő útmutatót egyér-
telműen megértette.
Csak akkor kezelje a terméket, ha a következő
útmutatót egyértelműen megértette.
Legal note
Operating Instructions / DET-AC III Master / 916005 / 11-2022 / en_US 9

2 General
This document contains important information for working safely and efficiently with
the active extinguishing system DET-AC III Master (referred to below as the
"system").
This document is intended for qualified personnel Ä Chapter 3.6 “Qualification
of personnel” on page 18.
2.1 Overview
Fig. 1: Structure of the system
1 Tank (extinguishing agent container) with
fill level monitoring and release device
2 Propellant cartridge
3 Detector interface
4 Air flow monitoring filter
5 Fire detectors
6 Connection strip (connection technology
card / network interface card)
7 Control card CPU3
8 Suction pipe connection
9 Fan
10 Power supply
11 Emergency power supply (batteries)
12 Discharge nozzle
13 Front panel with display and control panel
14 Control panel card BT3
2.2 Abstract
The active extinguishing system DET-AC III Master, which is intended for installation
in closed 19" cabinets (e.g. server, network or switch cabinets), is a stand-alone,
compact unit that was developed to detect and extinguish fires.
NovecTM 1230 manufactured by 3MTM (FK-5-1-12) is used as the extinguishing
agent which is discharged evenly in the extinguishing zone via a discharge nozzle.
This extinguishes the fire by extracting heat energy from the flames.
Fire detection occurs by means of 2 fire detectors.
General
Operating Instructions / DET-AC III Master / 916005 / 11-2022 / en_US 10

Alarms and failures can be transmitted to a superordinate position (building control
technology or permanently manned location) via potential-free contacts, the Moni-
toring System CMC, the IoT interface or via the Power Distribution Unit PDU (Rittal
products).
Network capability is established with one of the mentioned Rittal products.
The compact system with a space requirement of only one rack unit is intended for
installation in the upper third of the closed 19" cabinet to be protected.
2.3 Scope of delivery
Designation Unit Part no.
Active extinguishing system DET-AC III Master 1 7338.121
Battery, 12 V / 2.3 Ah 1) 2 4003368
Mains connection cable, C13 – C14 / 2.5 m (8.2 ft) /
10 A / 250 V AC / 3×1.0 mm2 (3×AWG 18)
1 924861
End-of-line resistor, 1.8 kΩ (for door contact / manual
call point) 2)
2 675235
47R end-of-line resistor with 1N4007 rectifier diode for
alarm device 2)
1 917751
470 Ω, 0.5 W resistor (for door contact / manual call
point) 3)
1 675223
1K end-of-line resistor (for "RJ12 plug" door contact
switch) 3)
1 908119
22K end-of-line resistor (for "RJ12 plug" door contact
switch) 3)
1 906913
Rail, left 3) 1 915914
Rail, right 3) 1 915915
M4×6 oval head screw (for mounting the left and right
rails on the system, side) 3)
12 889264
M5×16 oval head screw (for mounting the left and right
rails on the 19" cabinet, rear) 3)
4 906928
M6×16 oval head screw (for mounting the front panel in
the 19" cabinet) 3)
2 607284
Sign DET-AC III Master 3) 1 916087
"Gas-based extinguishing system – Danger to health"
warning sign, German/English (for marking on the 19"
cabinet)
2 933512
Operating instructions, German 3) 1 916004
Operating instructions, English 3) 1 916005
3MTM NovecTM 1230 safety data sheet, German 3) 1 917711
General
Operating Instructions / DET-AC III Master / 916005 / 11-2022 / en_US 11

Designation Unit Part no.
3MTM NovecTM 1230 safety data sheet, English 3) 1 917712
DET-AC safety data sheet, German 3) 1 920329
DET-AC safety data sheet, English 3) 1 920330
1) pre-assembled
2) assembled
3) included in pack
Accessories
● Suction pipe system (part number 7338.130)
● Access sensor (part number 7030.128)
(hereinafter also referred to as "door contact switch")
● Extension cable for sensors (part number 7320.814), for connection to a Rittal
monitoring system
● Variable-depth slide rails (part number 5302.035), optional
● Sealing kit (part number 7338.135)
The sealing kit contains material for sealing the brush strips in the roof plate of
the VX IT network and server cabinet and for sealing the LCP (Liquid Cooling
Package).
Optional:
One of the following Rittal products must be used to establish network capability:
● CMC Processing Unit
● IoT interface
● Power Distribution Unit PDU
– metered
– metered plus
– switched
– managed
2.4 Limitations of liability
All specifications and information provided in this operating instruction have been
compiled in consideration of all applicable standards and regulations as well as the
state of the art. The manufacturer accepts no liability for the following damage:
● Failure to follow this operating instruction
● Failure to follow local provisions and any regulations regarding the maintenance
of fire extinguishing systems
● Operating the system in environmental and usage conditions other than the ones
for which the system has been designed Ä Chapter 14 “Technical data”
on page 120
● Use for other than the intended purpose
● Unauthorized technical changes
General
Operating Instructions / DET-AC III Master / 916005 / 11-2022 / en_US 12

● Use of components not included in the system’s scope of delivery
● Non-compliance with maintenance intervals
● Non-performance of maintenance
● Maintenance errors due to non-compliance with current maintenance instruc-
tions / current maintenance notes of the manufacturer
● Damage for which a third party is to blame
● Intentional damage/manipulations
● Damage resulting from an unauthorized modification to the system
● Repairs not carried out according to regulations
● Actions that are not in the area of those described in this operating instruction
Use of the system must comply with local regulations, laws and standards. The
owner is responsible for the appropriate selection, intended use and compliance
with all standards, codes and ordinances.
The construction and use of the system described in this operating instruction are
only to be used for the purposes that are shown and described. The manufacturer or
private labeler provides no warranty or guarantee for uses not described in this
specification or for uses that do not comply with legal and local regulations.
Graphs or reports used in this operating instruction are for illustrative purposes only,
are not representative or descriptive of any specific design and can deviate from the
actual version of the system.
The manufacturer or private labeler and its representatives disclaim use of the
depictions, graphs and reports for any purpose other than illustration; any other
application or usage is solely the responsibility of the owner.
General
Operating Instructions / DET-AC III Master / 916005 / 11-2022 / en_US 13

3 Safety
This section provides an overview of all important aspects that are essential for the
protection of personnel as well as safe and trouble-free operation. Additional task-
specific safety instructions will be provided in the sections that refer to the individual
life stages of the plant.
3.1 Safety and warning notices
Safety and warning notices are marked with symbols in this document. The introduc-
tory signal words express the extent of the danger in each case.
L WARNING
This signal word describes a danger with a medium risk level. If the danger is not
avoided, it may result in death or serious injury.
L CAUTION
This signal word describes a danger with a low risk level. If the danger is not
avoided, it may result in minor or moderate injury.
NOTICE
This signal word describes a danger with a low risk level. If the danger is not
avoided, it may result in property and environmental damage.
Further markings
INFORMATION
This marking emphasizes useful tips and recommendations as well as information
for efficient and trouble-free operation.
In instructions, this marking starts with the symbol .
3.2 Warnings in instructions
Warnings can refer to specific, individual instructions. Such warnings are embedded
in the instructions so that they do not interrupt the reading flow when executing the
action. The signal words described above are used.
Example:
1. Unscrew screw.
2. L CAUTION! Clamping danger on the cover.
Carefully close the cover.
3. Tighten screw.
Safety
Operating Instructions / DET-AC III Master / 916005 / 11-2022 / en_US 14

3.3 Intended use
This system is designed exclusively for the intended use described here.
The system is designed exclusively to detect and extinguish smoldering or devel-
oping fires in closed 19" switch cabinet systems.
The system must only be operated using the extinguishing agent NovecTM 1230 by
3MTM.
The system must only be used in areas which personnel do not enter.
Typical applications for using the system is the protection of closed 19” switch cabi-
nets. This, for example, includes:
● IT, server and network technology
● Production controls
● Telecommunications equipment
● Power supply and control systems
The system may only be operated within the operating conditions specified in
Ä Chapter 14 “Technical data” on page 120.
Intended use also includes compliance with all specifications regarding mounting,
installation, checking, inspection and maintenance, which are described in this oper-
ating instruction:
● Ä Chapter 6 “Assembly and installation” on page 35
●
Ä Chapter 11 “Maintenance” on page 99.
Incorrect use
Any other use exceeding or deviating from the scope of intended use is considered
incorrect use.
L WARNING
Danger due to misuse!
Misuse of the system can lead to personal injury and property damage.
● No structural changes to the device to be protected or to the system may be
performed.
● Do not use the device to be protected in any way that is contrary to that which
was considered by the trained Authorized Distributor.
● Do not block the discharge nozzles.
The system must not be used for the following incendiaries:
● Chemicals that release oxygen.
● Mixtures containing oxidizing substances (e.g. sodium chlorate, sodium nitrate,
explosives, gunpowder).
● Chemicals capable of thermally decomposing autonomously (e.g. certain organic
peroxides).
● Reactive metals (e.g. sodium, potassium, magnesium, titanium or zirconium) and
reactive hybrids or metal amides.
Safety
Operating Instructions / DET-AC III Master / 916005 / 11-2022 / en_US 15

The system must not be used under the following operating conditions:
● Hot surfaces above 500 °C (932 °F), which due to operational conditions have
been heated to temperatures in excess of the extinguishing agent’s decomposi-
tion temperature.
Structural changes
This system has been tested for the intended use. Consult an Authorized Distributor
if changes to the device are planned.
3.4 Safe operation
The system described here was manufactured in accordance with state-of-the-art
technology and recognized safety rules and exhibits a high degree of operational
safety.
Nevertheless, improper or non-intended use / application of this system can cause
impairments to the system or to other assets.
The system must only be used in a fully functional, undamaged state.
The information provided in this operating instruction regarding installation, opera-
tion and maintenance of the system is intended to aid proper, safe and failure-free
operation. As regulations in this regard can deviate from each other due to world-
wide use, the applicable national regulations and laws at the site of operation are to
be observed in so far as they contradict the information provided in this operating
instruction. As a general rule, the following information in particular is to be
observed / adhered to:
● National safety and accident prevention regulations.
● National standards and laws; in particular those concerning hazard detection
systems.
● National assembly and construction regulations.
● Generally recognized rules of technology.
● This operating instruction and the warnings and safety instructions contained
within it.
● Parameters and technical data of this system.
If it can be assumed that safe operation is no longer possible (e.g. in the event of
damage), the system is to be taken out of service immediately and secured against
accidental commissioning.
Spare parts
Only original spare parts may be used Ä Chapter 12 “Spare parts, accessories, con-
sumables, and tools” on page 116.
3.5 General dangers
The following section lists residual risks which could occur even from intended use
of the system.
Safety
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In order to reduce the risk of personal injury or property damage and to avoid haz-
ardous situations, follow all safety and warning notices listed in this document.
3.5.1 General dangers associated with fire extinguishing systems
L WARNING
Risk of injury from faulty release!
A faulty release of the system may cause injuries and property damage.
● Release the system via manual call points only in the event of a fire.
● Protect the manual call points in the extinguishing zone from inadvertent actua-
tion.
● Block the system before performing any work in the extinguishing zone gener-
ating heat and smoke.
L WARNING
High voltage!
An imminent risk of death or severe physical injury due to electric shock.
● All tasks at the open system may only be performed by electricians with appro-
priate training.
3.5.2 Dangers when activating the system
L WARNING
Risk of injury from developing products of decomposition and fire smoke!
Fires generate decomposition products which may lead to chronic health impair-
ments if inhaled and if there is contact with the skin.
● Do not use the system if, in normal operation, surface temperatures in excess
of 500 °C (932 °F) are to be expected.
● Keep the extinguishing zone closed in the event of a fire, e.g. do not open any
of the switch or server cabinet doors.
● After a fire, the extinguishing zone is not to be opened by the safety officer until
the danger of re-ignition has subsided.
L WARNING
Risk of injury from shock!
The release of the system involves sudden noises from the discharged agent
which may surprise persons to the extent that they suffer shock.
● Inform all persons staying close to the extinguishing zone about the existence
of the system and the possibility of its sudden release.
● Make persons familiar with the procedures required in the event of an alarm, a
fire or release of the system.
Safety
Operating Instructions / DET-AC III Master / 916005 / 11-2022 / en_US 17

L WARNING
Risk of injury from noise!
High noise levels due to acoustical alarms (e.g. signal horns) can cause hearing
damage.
● Stay out from the immediate vicinity of acoustic alarm equipment.
NOTICE
Property damage from cooling ambient air!
The discharged extinguishing agent extracts heat from the ambient air contained in
the extinguishing zone. This cools down the extinguishing zone by as much as
20 °C (36 °F) when fighting a fire.
● Do not mount components that are sensitive to cold and varying temperatures
in the immediate vicinity of the discharge nozzle.
NOTICE
Property damage from falling and flying objects!
The discharge velocity of the extinguishing agent may cause unsecured objects to
tip over or become airborne.
● Do not place any loose objects into the outflow area of the discharge nozzle.
3.6 Qualification of personnel
L WARNING
Inadequately qualified persons pose a hazard!
Inadequately qualified persons cannot assess the risks involved in handling the
system. They expose themselves and others to the risk of severe or fatal injuries.
● All work should be carried out only by persons qualified to do so.
Before starting any work, the following persons must be identified who have the
knowledge required to operate the system:
● A person to be responsible for the system
● An operator/person authorized by the operator
Tasks may only be performed by persons who can be reasonably expected to per-
form the tasks reliably. Persons whose reaction time is impaired (e.g. by drugs,
alcohol, or medication) are not authorized.
All work must be carried out only by persons who meet the following prerequisites:
● They have read and understood this document, including the safety notices and
warning notices.
● They are familiar with basic regulations on occupational safety and accident pre-
vention.
● They have been given instruction on handling the system.
Safety
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The various tasks described in this document require that the persons responsible
for them have different qualifications. These qualifications, which are referred to
again at the beginning of the respective section of this document, are specified
below:
Authorized Distributor
The Authorized Distributor has verifiably undergone training provided by the manu-
facturer during which the company was made familiar with the knowledge and pro-
cedures necessary to install, commission and service fire suppression systems in a
safe manner.
Person in charge of the system
The person in charge of the system has verifiably been given instructions by the
company that installed the system as to the specifics of the tasks entrusted to
him/her and all possible dangers that may arise from improper conduct.
The person in charge of the system has been appointed by the owner as the person
who is responsible for the correct and proper completion of the work and inspections
performed on the system.
Qualified electrician
The qualified electrician is capable of performing work on electrical systems and
independently detecting and avoiding any possible risks due to his/her long years of
expertise and experience and his/her familiarity with all applicable standards and
regulations.
A qualified electrician must also provide proof of his/her professional qualification
that confirms his/her capacity to perform work on electrical systems.
The qualified electrician must comply with the provisions of all applicable legal regu-
lations regarding accident prevention.
Qualified specialist personnel
Qualified specialist personnel are persons with the following qualifications and
authorizations:
● These persons are qualified for the respective activities as a result of their edu-
cation, experience, and participation in a training course conducted by the manu-
facturer or distributor.
● These persons have the appropriate knowledge of standards, directives, acci-
dent prevention regulations, and operating conditions.
● These persons have been authorized by the person responsible for the safety of
the system to carry out the necessary activities and are capable of recognizing
and avoiding possible risks.
Unauthorized persons
L WARNING
Risk of injury for unauthorized persons!
Persons who do not meet the requirements described are not familiar with the haz-
ards connected with the function (e.g. activation and/or isolation) of the system.
This poses a risk of injury.
● Keep unauthorized persons away from control equipment.
● In case of doubt, instruct persons to move away from control equipment.
Safety
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3.7 Instruction
The Authorized Distributor must instruct the owner’s person in charge of the system
in the handling of the system and subsequently hand over the operating instruction
to this person. For better traceability an instruction report must be drawn up with at
least the following contents:
● Date of the instruction
● Name of the person being instructed
● Content of the instruction
● Name of the instructor
● Signatures of the instructed person and the instructor
● Part number and serial number of the system.
3.8 Personal protective equipment
Personal protective equipment is designed to protect people from risks to their
safety and health at the workplace.
Personnel must wear personal protective equipment, which is specially indicated in
the individual sections of this document, when carrying out the various tasks.
Additional personal protective equipment may also be required due to local condi-
tions, directives, company specifications, etc.
The following describes the required personal protective equipment, which is
referred to again at the beginning of the respective sections of this document:
Protective goggles
Protective goggles cover the entire area of the eyes (including the
sides) and are used to protect the eyes from the extinguishing agent
and from particles that are whirled up by the extinguishing agent.
Safety footwear
Safety footwear protects the feet from crushing injuries, falling parts,
and slipping on slippery substrates.
Safety gloves
Safety gloves are used to protect the hands from friction, abrasions,
puncture wounds or deeper wounds as well as coming into contact
with hot surfaces.
Safety
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