EXXFIRE 750TW Manual

Installation and Service Manual
EXXFIRE®750TW/1500TW/2250TW

EXXFIRE Installation and Service Manual 3
Installation and Service Manual
version 3.3 –November 2021
EXXFIRE®750TW/1500TW/2250TW
For more information, or to order documents, contact:
EXXFIRE
Keyserswey 30
2201 CW Noordwijk
The Netherlands
Chamber of Commerce: 53952464
VAT: NL.8510.87.425.B.01
Tel: [phone]
[email protected]
© EXXFIRE, all rights reserved. No part of this document may be reproduced in any form, by print, photo print, microfilm, or
any other means without permission of EXXFIRE. Disclosure to third parties of this document or any part thereof, or the use of
this document by persons other than persons who have a need to know any information contained herein, is prohibited.

EXXFIRE Installation and Service Manual 4
TABLE OF CONTENTS
1INTRODUCTION 8
About this manual 8
Intended use 9
Disclaimer 9
2PRODUCT DESCRIPTION 10
EXXFIRE®750TW/1500TW/2250TW 10
About cool gas generators 14
Linear heat sensing cable for fire detection 14
Software for decision making 14
Electronics 15
Technical data 16
Lineair heat detection cable 17
Identification plate 17
Design life 17
3SAFETY 18
General 18
Personal protective equipment 19
Hygiene measures (apply in any case) 19
Installation 19
What to do when the unit is activated 20
What to do when someone is exposed to chemical contents 21
How to clean spilt material 21
Fire fighter instructions 21
Storage 22
4INSTALLATION 23
System contents 23
Mounting kit 23
Tools 25
Mounting 25
4.4.1 Outside mounting 25
Electrical connection 35

EXXFIRE Installation and Service Manual 5
5CONFIGURATION 39
Setup of the amount of Generators 40
Door switch 41
Manual Activiation Button 43
Master-Slave configuration 45
6REMOVAL OF CGG’S 46
Removal at end of life product 49
Removal at end of life CGG 49
Removal of defective product 49
Removal CGG after an event of fire 50
7TRANSPORTATION AND STORAGE 51
Transportation 51
Storage 52
8TROUBLESHOOTING 53
9INSPECTION AND MAINTENANCE 54
Spare parts 54
10 DECOMMISSIONING 55
11 DISPOSAL 56
Disposal at end of life product 56
Disposal at end of life CGG 56
Disposal of defective product 57
Disposal after an event of fire 57
12 ENVIRONMENT 58

EXXFIRE Installation and Service Manual 6
LIST OF REFERENCE DOCUMENTS
If not mentioned differently, the latest revision of a document always applies.
RD
Document name / number
Description
Notes
01
SFE-SP-001_SDS GEN09N2
Material Safety Sheet Generator

EXXFIRE Installation and Service Manual 7
LIST OF ABBREVIATIONS
In this manual, several abbreviations are used. They are listed in the table below.
CGG
Cool Gas Generator
ft3
Cubic feet
m3
Cubic meter
MSB
Most significant bit
LSB
Least significant bit
NO
Normally open
NC
Normally closed
MAB
Manual Activation Button
DSW
Door Switch

EXXFIRE Installation and Service Manual 8
1INTRODUCTION
The EXXFIRE® 750TW/1500TW/2250TW is an extinguishing unit that detects and extinguishes
fires in small, protected spaces, such as server racks and electrical cabinets.
Upon detection of a fire, nitrogen gas is released from the unit. The nitrogen gas dilutes the oxygen
level within the enclosure, and consequently suppresses the fire. The TW version of the systems are
using a thermal wire to detect fire. The thermal wire will cause a short once a specified temperature
has been reached.
About this manual
This document is the installation and service manual for the EXXFIRE® 750TW/1500TW/2250TW.
This manual contains all the information necessary to install, operate and service the EXXFIRE®
750TW/1500TW/2250TW for all phases of its product lifecycle, see Figure 1.
Figure 1: Product lifecycle
This manual concerns the original instructions in UK English. Keep it in a safe location! Ensure
access to this manual at all times.
This manual includes notes and warnings on safe installation and operation of the equipment.
These notes and warnings are accompanied by the following icons. Read them attentively!
Warning indicates a hazardous situation which, if not avoided, could result
in death or serious injury.
Caution indicates a hazardous situation which, if not avoided, could result in
minor or moderate injury or property/product damage.
Notice indicates information considered important, but not hazard-related.

EXXFIRE Installation and Service Manual 9
Intended use
Safe operation of the EXXFIRE® 750TW/1500TW/2250TW is only guaranteed if used as specified
in this manual. Other forms of use can put persons at risk as well as the surroundings and the
environment.
During all phases of the lifecycle of the EXXFIRE® 750TW/1500TW/2250TW (e.g., transport,
deployment, etc.), standard health, safety and environmental (HSE) procedures and regulations as
set forth by the product owner or local authorities must be adhered to, in addition to the specific
instructions in this document.
Misuse will occur when the EXXFIRE® 750TW/1500TW/2250TW is used
beyond its operational boundaries. Operational boundaries are described
in chapter 2 and must never be exceeded.
Only personnel trained and qualified by the EXXFIRE may install, inspect and maintain the product.
Disclaimer
It is the responsibility of the installer to ensure that the user is aware of the relevant contents of this
document and the documents listed herein.
It is the responsibility of the installer to ensure the linear heat cable is installed correctly and
adequately.

EXXFIRE Installation and Service Manual 10
2PRODUCT DESCRIPTION
EXXFIRE®750TW/1500TW/2250TW
The EXXFIRE® 750TW/1500TW/2250TW is a unit that is used to detect and extinguish fires in
small, protected spaces, such as server racks and electrical cabinets. The EXXFIRE®
750TW/1500TW/2250TW is equipped with:
•One, two or three cool gas generators to release nitrogen gas
•Linear heat sensing cable to detect fire
•Software to ensure robust decision making
•Electronics for configuration settings and status outputs
•Inputs for manual activation button (MAB) and door switch (DSW)
•Back-up battery
Upon detection of a fire event, nitrogen gas is released from a cool gas generator (CGG). The
nitrogen gas dilutes the oxygen level within the protected space, and consequently suppresses the
fire. This is in line with common practice using compressed IG-100, or other clean agents in higher
hazard class A fires at 20 oC. If normal class A fires are taken into consideration the systems can
protect a larger volume (see NFPA 2001 for the exact calculation). For class B fires a single
generator produces 1.16 m3.
Gas mass
kg
0,9
1.8
2.7
L
750
1500
2250
Protection
m3
1.5
3
4.5
ft3
53
106
159

EXXFIRE Installation and Service Manual 11
Table 1 Gas mass versus protected space (in normal conditions temperature and pressure)
Figure 2: EXXFIRE 750TW exterior
The EXXFIRE 750TW/1500TW/2250TW is housed in a metal casing. The EXXFIRE 750TW is shown
here.
Figure 3: EXXFIRE 750TW interior

EXXFIRE Installation and Service Manual 12
Figure 4: Electronics tray interior
Figure 5 Product dimensions
440
164
478

EXXFIRE Installation and Service Manual 13
Table 2 Product dimensions and weight
EXXFIRE®750TW
Length x Width x Height
329x440x164
13x17x6
EXXFIRE®750TW
Weight
10kg
22lbs
EXXFIRE®1500TW
Length x Width x Height
478x440x164
19x17x6
EXXFIRE®1500TW
Weight
18kg
39lbs
EXXFIRE®2250TW
Length x Width x Height
630x440x164
25x17x6
EXXFIRE®2250TW
Weight
25kg
55lbs

EXXFIRE Installation and Service Manual 14
About cool gas generators
The CGG’s supply the nitrogen gas to dilute the oxygen level within the protected space, and
consequently suppress the fire.
The CGG stores the gas as a chemical solid. The gas is bound up in a molecule which naturally
forms a solid at room temperature and is released when a chain reaction is started within the
canister. This controlled decomposition of the solid ‘grain’ reaches high temperatures as it breaks
down, before passing through a cleansing and heat absorbing filter.
Finally, the cooled nitrogen gas is passed through a very fine filter to remove further impurities
before being released into the protected space.
The base material for the gas production is sodium azide (NaN₃). This is mixed with a number of
other modifying chemicals to make the grain perform with the desired characteristics. The
encapsulated product is generally safe to handle.
When the CGG is deployed to protect against a fire, the core grain material (sodium azide) changes
state as it is decomposed to produce nitrogen gas, and a sodium ‘slack’ is formed. As
sodium can exhibit energetic reactions in certain conditions, it is imperative that care is
taken to follow the basic installation and handling guidelines.
With appropriate handling, the CGG will remain in a safe and stable configuration throughout its
lifecycle, allowing it to be transported, stored, used, and recycled in line with local legislation. As
with many high-tech chemical products, mistreating the CGG could lead to potentially dangerous
exposure of energetic chemicals.
Linear heat sensing cable for fire detection
The linear heat sensing cable needs to be guided through the protected space in such a way that
the elements within the protected space which can cause a fire are in the vicinity of the cable. When
a fire starts the temperature will rise which causes the cable to short circuit which triggers the
gaseous fire suppression of the EXXFIRE® 750TW/1500TW/2250TW.
This provides an exceptionally reliable means to detect a fire, which reduces false alarms, and
avoids releasing the gas unnecessarily. The linear heat cable is available in the mounting kit with
two heat sensing levels one at 68C (mounting kit 4) and the other at 104C (mounting kit 5).
Software for decision making
The robust software is simple and monitors the linear heat sensing cable, mains power, battery
back-up and squib connectors. If something is wrong with these elements the system will give a
fault signal, triggering a relay and fault LED.

EXXFIRE Installation and Service Manual 15
Table 3 Threshold and effects
Electronics
Status outputs from the system are established by relay contacts.
Relays are rated to 2 A at 28 VDC. This supports connection to most alarm panels, building control
systems and direct connection to DIN rail mounted relays for supplementary shut-down etc.
Table 4 Status outputs by relays
All relays are dual pole, dual throw, thus providing the installer with a flexible range of options for a
wide variety of applications. All outputs are duplicated, and isolated.
For example, the Normally Open alarm output, would typically be connected to the fire panel to
indicate a fire status. The changeover contacts may be connected to a separate building
management system without any interconnectivity issues.
Wired inputs
No wired inputs are made available to the installer in this product except for the Power Cable, a
manual activation button and a door switch. This will allow the addition of wired inputs to
incorporate a door switch (to ensure integrity of the enclosed volume against leakage), and a
manual override switch (to inhibit gas release when an operator is present).
Configuration settings
The EXXFIRE® 750TW/1500TW/2250TW series can be interconnected via a wiring protocol. This
means that multiple systems can be used to protect one larger volume.
The settings are described in chapter 5.
Threshold
Action
Notes
Sub-nominal
Enter fault status
The system has numerous internal self-test functions, all
of which will cause a fault status to be entered if an
anomaly is detected
Nominal
No action
System is functioning normally
Alarm
Close alarm relay
Positive identification of a fire event, by means of either a
shorted heat sensing cable or activation or the MAB –
normally connected to a central fire panel
Action
Release gas
Gas is released 15 seconds after the fire event is
detected
Relay
Primary Contacts
Fault
Normally Open (when energized by the functioning system)
Alarm
Normally Open (passive state)

EXXFIRE Installation and Service Manual 16
Technical data
Table 5: Technical data
EXXFIRE 750TW
EXXFIRE
1500TW
EXXFIRE 2250TW
L x W x H
Excluding
manifold
334 x 442 x 164
452 x 442 x 164
615 x 442 x 164
mm
13.1 x 17.4 x 6.5
17.8 x 17.4 x
6.5
24.2 x 17.4 x
6.5
inch
L x W x H
Including
manifold
341 x 442 x 164
459 x 442 x
164
622 x 442 x
164
mm
13.4 x 17.4 x 6.5
18.1 x 17.4 x
6.5
24.5 x 17.4 x
6.5
inch
Weight
excluding box
9.4
17.4
24.4
kg
20.7
38.4
53.8
lbs
Weight
including box
10.9
18.9
25.9
kg
24.0
41.7
57.1
lbs
Gas mass
0.9
1.8
2.7
kg
750
1500
2250
L
Protection
volume*
1.5
3
4.5
m3
53
106
159
ft3
Protection
volume **
1.16
2.32
3.48
m3
41
82
123
ft3
Pressure
0 - 10
0 - 10
0 - 10
bar
ADR***
9/4.3
9/4.3
9/4.3
Class
UN***
3268/3543
3268/3543
3268/3543
Rating****
IP30/IP67
IP30/IP67
IP30/IP67
Class
Voltage (mains)
110/230
110/230
110/230
Vac
Back-up power
12
12
12
Hours
Battery
Lifetime @
20°C
4
4
4
Years
Lifetime
generator @
20°C
10
10
10
Years
Lifetime
system @ 20°C
12
12
12
Years
Temperature
-0 to 50
-0 to 50
-0 to 50
°C
Generators
1
2
3
pcs
* NFPA2001 Design concentration Class A = 40.3%
** Design concentration class B = 47.6%
*** Before and after deployment
**** System Enclosure / Generator housing

EXXFIRE Installation and Service Manual 17
Linear heat detection cable
The heat detection cable works using two cables which are fused using an active polymer. When
heat above the specified rating is applied to the cable, both cores are fused together which will
result in a short circuit. This short circuit is detected by the TW system and is used to active the cool
gas generator. Every linear heat detection cable needs a 1k end resistor to work properly with the
TW system (provided in mounting kit)
Identification plate
Figure 6 Location of the identification plate
The identification plate is located above the key-switch, as illustrated in Figure 6.
The following details are displayed on the identification plate:
•Company name
•System type
•Barcode
•Serial number
Design life
The product design life is defined in terms of time only. This can be impacted by external factors like
temperature. The design life (or technical life span) of the product is stated below:
•CGG design life (after installation): 10 years
•Linear heat detection cable life: 10 years
•Battery design life: 4 years

EXXFIRE Installation and Service Manual 18
3SAFETY
General
The EXXFIRE® 750TW/1500TW/2250TW contains pyrotechnic and chemical components that are
hermetically sealed off from the environment. These cannot be released under normal or
reasonably foreseeable conditions of use including proper disposal.
EXXFIRE products should only be handled by trained professionals. EXXFIRE provides specialist
training to all professional handlers through its distributors. The distributors are responsible for
providing the right training and correct information about the installation, handling and removal of
the product.
The EXXFIRE products are dependent on chemical technology from the space industry. This
technology necessitates special knowledge of the product to ensure a robust, safe, and functional
manufacturing.
Handling of the EXXFIRE® 750TW/1500TW/2250TW must only be done by qualified and trained
personnel familiar with the product and its documentation (product datasheet, operating manual).
Incorrect handling or use of the product can cause serious damage and lead to serious injuries and
fatalities.
These guidelines with respect to the constituent materials apply to the EXXFIRE®
750TW/1500TW/2250TW. The material safety data sheet (MSDS) of the generators can be found
in Appendix A.
•Do not handle the unit until all safety precautions have been read and understood.
•Do not expose devices to temperatures above 85 C,
•Avoid all possible contact with grain inside the generator.
•Make sure that the unit is only handled in well ventilated areas.
•To prevent unnecessary initiation, keep the unit away from heat/sparks/open flames/hot
surfaces. Also, do not smoke in the enclosure where the unit is placed.
•Do not open, drill, incinerate, crush, immerse or expose to temperatures above range
reported for products.
•Do not bring the unit in contact with water, because of violent reaction and possible flash
fire.
•In case of fire: Use dry powder or sand for extinction.
•Avoid release to the environment.
•Do not store together with combustible or oxidizing substances or mixtures.
•Dispose of the contents/ container of the unit at an approved waste disposal plant.
•Do not use the product beyond its design life in duration check www.exxfire.com.

EXXFIRE Installation and Service Manual 19
Personal protective equipment
The personal protective equipment mentioned in this section must be used in the event of a
hazardous situation. In normal circumstances, only safety shoes are required.
Respiratory protection: In case of contact with grain inside CGG
Hygiene measures (apply in any case)
•Handle in accordance with good industrial hygiene and safety practice. Wash hands before
breaks and at the end of the workday.
•Do not inhale released gas.
Installation
•ExxFire recommends installing the EXXFIRE® 750TW/1500TW/2250TW with two people.
Symbol
Prescribed personal protective equipment
▪Where risk assessment shows air-purifying respirators are
appropriate, use a full-face particle respirator type N100 (US) or type
P3 (EN 143) respirator cartridges as a backup to engineering controls.
▪If the respirator is the only means of protection, use a full-face
supplied air respirator.
▪Use respirators and components tested and approved under
appropriate government standards such as NIOSH (US) or CEN (EU).
▪Hand protection (latex or nitril), in case of contact with grain inside
CGG.
▪The selected protective gloves should satisfy the specifications of EU
Directive 89/686/EEC and the standard EN 374 derived from it.
▪Eye protection, in case of contact with grain inside CGG:
▪Safety glasses with side-shields conforming to EN166.
▪Skin and body protection, in case of contact with grain inside CGG:
▪Choose body protection according to the amount and concentration of
the dangerous substance at the workplace.
▪Safety boots

EXXFIRE Installation and Service Manual 20
•Do not install the unit outdoors. The unit can only be used to protect uninhabited small
enclosures such as server racks and cabinets.
In normal circumstances, the chemical agents within the CGG are safely contained within the unit.
During normal installation and maintenance, it is unlikely that the CGG housing could become
damaged, as it is protected by the aluminum casing.
As with any electrical device, care should be taken to avoid exposure to live electrical parts. The
device operates from a main power supply and contains a battery. See datasheet in Appendix D.
The connection of the system must be in compliance with general and specific rules defined in the
installation place as defined for example in IEC 60364-1 :2005 (breaker)
•Only a trained installer / engineer should remove any cover from the device.
•The unit should be powered off before any cover is removed from the device to avoid
exposure to high-voltage areas.
•The key switch doesn’t cut the main power, unplug from the main power.
•Power should not be restored until all covers are safely back in place.
What to do when the unit is activated
The installer must inform the owner on what to do when the unit is activated, and gas is released.
Nitrogen 99% and combustion gases 1% (e.g., H2O, CO, CO2….) are released, so there is risk of
asphyxia due to the lack of oxygen and potential respiratory tract exposure when somebody is inside
the protected volume (e.g., inside the cabinet when the EXXFIRE system is activated).
Consequently, at all times, the following applies when the system is ACTIVATED:
•Immediately evacuate all people from the room in which the small enclosure is located.
•Always ensure a good ventilation of room in which the small enclosure is located before
resuming operational functions.
•If needed wear self-contained breathing apparatus for firefighting when opening the small
enclosure.
•Let the CGG (passively) cool down for at least 12 hours and contact the distributor for
installing a fresh system.
In case someone accidently inhales the gas released from the CGG:
1. Bring the victim to a well-ventilated area.
2. In case of difficult breathing, give the victim extra oxygen.
3. Consult a physician.