EXXFIRE 750CNF Manual

version 4.7.2 –July 10th, 2022
Installation and Service Manual
EXXFIRE®
750CNF/1500CNF/2250CNF
CNPP version

Thermoplastic Composite Pipe Downline 2

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EXXFIRE Installation and Service Manual 3
Installation and Service Manual
EXXFIRE®
750CNF/1500CNF/2250CNF
Registered under N° 55.22.221
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.

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TABLE OF CONTENTS
1INTRODUCTION 8
About this manual 8
Intended use 9
Disclaimer 9
2PRODUCT DESCRIPTION 10
EXXFIRE® 750CNF/1500CNF/2250CNF 10
Compatibility 17
About Cool Gas Generators 17
Aspirating smoke detection system 18
Software for decision making 18
Electronics 19
Power Supply and battery back-up 20
Connection of multiple systems 20
User Interface panel 21
Technical data 22
List with Optional and Additional functions 24
Identification plate 25
Design life 26
3SAFETY 27
General 27
Personal protective equipment 28
Hygiene measures (apply in any case) 28
Installation 29
Configuration 29
What to do when the unit is activated 30
What to do when someone is exposed to chemical contents 30
How to clean spilt material 31
Fire fighter instructions 31
Storage 31
4INSTALLATION 32
ExxFire system contents 32
Mounting kit 33
Tools 35
4.3.1 Squib Simulator 35

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Mounting 37
4.4.1 Outside the protected enclosure mounting 37
4.4.2 Inside mounting 47
Electrical connections 55
4.5.1 Information and warnings 55
4.5.2 Install mains power cable 57
4.5.3 Install wiring for Connecting Systems 58
4.5.4 Install cable for Pre-alarm, Alarm and Fault outputs 61
4.5.5 Install wiring for Manual Activation Button input 63
4.5.6 Install wiring for Door Switch input 65
4.5.7 Connecting the Battery 68
Placement UI box 69
5CONFIGURATION 72
Smoke Sensitivity 73
Extinguishing Gas Delay 74
Simultaneous Gas Release 75
Flow monitoring sensitivity 76
Manual Activation Button and Door Switch 76
Connected systems in a Master-Slave configuration 77
6COMMISSIONING 79
Commissioning of the flow monitoring system 79
7OPERATION 81
User Interface and key switch 82
Turning system ON and OFF and Resetting the system 90
Smoke detection and Alarm 91
Manual Activation Button 92
Door Switch 92
DISABLE Fire Extinguishing 93
Fire Extinguishing 95
Reset Alarm/Gas Released 96
Flow monitoring 97
Power Supply System including battery backup 98
Monitoring Cool Gas Generator status 98
Operation of connected systems 99
Service Intervals 100
System fault 100
Data logging 101
Disconnected display 101

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8REMOVAL OF CGG’S 102
Removal at end of life product 103
Removal at end of life CGG 103
Removal of defective product 103
Removal CGG after an event of fire 104
9TRANSPORTATION AND STORAGE 102
Transportation 106
Storage 107
10 TROUBLESHOOTING 108
11 INSPECTION AND MAINTENANCE 109
Replace filter 110
Spare parts 112
12 DECOMMISSIONING 113
13 DISPOSAL 114
Disposal at end of life product 114
Disposal at end of life CGG 115
Disposal of defective product 115
Disposal after an event of fire 116
14 ENVIRONMENT 116
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

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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
MAB
Manual Activation Button
DSW
Door Switch
MSB
Most significant bit
LSB
Least significant bit
NO
Normally open
NC
Normally closed

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1INTRODUCTION
The EXXFIRE®750CNF/1500CNF/2250CNF 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 CNF version of the systems
can be connected to enlarge the protected volume.
About this manual
This document is the Installation and Service Manual for the EXXFIRE®
750CNF/1500CNF/2250CNF.
This manual is aimed at CNF devices which;
•Run firmware version 2.1.7 or higher
•Have serial number SN00002620 or higher
This manual contains all the information necessary to install, operate and service the EXXFIRE®
750CNF/1500CNF/2250CNF 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!

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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.
Intended use
Safe operation of the EXXFIRE®750CNF/1500CNF/2250CNF 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®750CNF/1500CNF/2250CNF (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®750CNF/1500CNF/2250CNF 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 Company 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. To ensure full system capabilities it is important to
check the following elements before installing the EXXFIRE systems:
1. Air tightness /leakage of the protected volume (e.g. cabinet). Gaseous fire protection works
only if the extinguishing gas can be kept inside the protected volume as long as possible to
prevent reignition
2. If in doubt the following precautions can be made; Close off all openings visible (cable
entries, ventilation etc.) with fire retardant material
3. Perform a functional test with an actual extinguishing to do an oxygen level measurement
for each cabinet type to ensure the proper design concentrations and hold time per
installation
4. If hold time is too low use EXXFIRE relay contact to switch OFF the Power to the cabinet, this
will prevent reignition also.

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2PRODUCT DESCRIPTION
EXXFIRE® 750CNF/1500CNF/2250CNF
The EXXFIRE® 750CNF/1500CNF/2250CNF is a unit that is used to detect and extinguish fires in
small protected spaces, such as server racks and electrical cabinets. The EXXFIRE®
750CNF/1500CNF/2250CNF is equipped with:
•One, Two or Three Cool Gas Generators (CGG) to release nitrogen gas
•Air inlet fan and filter
•Three optical sensors to detect smoke
•Software to ensure robust decision making
•Electronics for configuration settings and status outputs
•Power supply unit with back-up battery
•Input terminals for Manual Activation Button and Door switch
•RS485 communication bus to connect up to 8 systems to work as one system to protect larger
volumes up to 36 m3
•User Interface with status LEDs, numerical display, push buttons and a key switch
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°C. If Normal Class A fires are taken into consideration the systems can
protect a larger volume (see NFPA 2001 for the exact calculation)
EXX-750CNF
EXX-1500CNF
EXX-
2250CNF
1 generator
2 generators
3 generators
Gas mass
kg
0,9
1.8
2.7
L
750
1500
2250
Protection
m3
1.5
3
4.5
ft3
53
106
159
Table 1 Gas mass versus protected space (in normal conditions temperature and pressure)

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The EXXFIRE 750CNF/1500CNF/2250CNF is housed in a metal casing. Here the EXXFIRE 1500CNF
is described.
Figure 2 EXXFIRE 1500CNF in/exterior (system with flexible User Interface mounted at front side)
Figure 3 EXXFIRE 1500CNF in/exterior (system with flexible User Interface mounted at left side panel)
Flexible User Interface
Key Switch Operation/Access level 2

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Figure 4 EXXFIRE 1500CNF in/exterior (system with flexible User Interface mounted at right side panel)
Figure 5 EXXFIRE 1500CNF in/exterior

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Figure 6 Interior electronics box
Figure 7 Exploded view

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Figure 8 Product dimensions (EXX-1500CNF flex-User Interface mounted at front side)

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Figure 9 Product dimensions (EXX-1500CNF flex-User Interface mounted at left side panel)
Figure 10 Product dimensions (EXX-1500CNF flex-User Interface mounted at right side panel)

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UI on front side
UI on one of the side
panels
EXXFIRE®
750CNF flex
Length x Width x Height
359x446x164
332x473x164
Weight
20.5 kg
20.5 kg
EXXFIRE®
1500CNF flex
Length x Width x Height
508x446x164
481x473x164
Weight
30.5 kg
30.5 kg
EXXFIRE®
2250CNF flex
Length x Width x Height
660x446x164
633x473x164
Weight
41.5 kg
41.5 kg
Table 3 Product dimensions and weight for systems with flexible User Interface

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Compatibility
The EXXFIRE CNF systems can be a substitute for the EXXFIRE®750/1500/2250. The top mounting
kits are equal for all EXXFIRE aspirating smoke detection systems, where the rack mounting kits for
the EXXFIRE CNF system contains additional brackets as compared to the rack mounting kits for the
EXXFIRE®750/1500/2250. As the length of the EXXFIRE CNF systems are different it might be
needed to adjust the length of the gas pipe.
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. 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.

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Aspirating smoke detection system
The system continually monitors the status within the protected space by taking air samples and
testing it for smoke. Air is drawn into the EXXFIRE®750CNF/1500CNF/2250CNF using a centrifugal
fan.
The air is filtered through a high-grade filter, which allows the broad range of smoke particles to
pass freely through, while preventing harmful dust ingress. This minimizes the chance of false
alarms caused due to solid particulates and insects, while maintaining a high throughput.
The carefully filtered air is then passed into the detection chamber, where three high-sensitivity
optical smoke detectors are exposed to the same sample. Each of the three calibrated detectors
can build up a reliable histogram of smoke obscuration data, and thus provide a reliable output in
its own right. This temporal reliability is then fortified by redundancy, by using the three detectors to
vote simultaneously. This provides an exceptionally reliable means to detect a fire, which reduces
false alarms, and avoids dropping the gas unnecessarily.
Air flow is monitored in line with EN54-20 (aspirating smoke detectors) to ensure that the inlet is not
blocked or broken, or that the filter is blocked. Either case will result in a fault status. Air flow is
monitored after the detection chamber, where it is then ejected through vents in the case –
sampled air is not returned to the protected space.
Software for decision making
The three smoke detectors are used to build up a picture of the current status of air in the protected
space. Three thresholds are defined in the software. As the smoke level rises above each threshold,
actions are taken accordingly. The thresholds and related actions are outlined in the following table:
Table 4 Smoke Thresholds and effects
The system also has an input for a Manual Activation Button (MAB). When this MAB is activated this
will also generate an Alarm, resulting in closing the ALARM relay, turning on the Alarm LED and
releasing the gas, just as when the smoke level surpasses the threshold value for Alarm.
Threshold
Action
Notes
Pre-Alarm 1
Close Pre-alarm relay,
Pre-alarm 1 LED on,
Emit sound signal
First indication that smoke level is above normal, this is
a positive acknowledgement that smoke has been
detected
Pre-Alarm 2
Pre-alarm 2 LED on,
Emit sound signal
Second indication that smoke level is above normal.
Alarm
Close Alarm relay,
Fire Alarm LED on.
Emit sound signal,
Release gas
Positive identification of a fire event –normally
connected to a central fire panel
Gas is released after this threshold is exceeded, after a
delay which can be programmed by the installer
depending on the application –it may be desirable to
allow the air conditioning fan to stop before ejecting gas
for example.

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Electronics
Relay outputs
Status outputs from the system are established by relay contacts.
Relay contacts 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 5 Fault and Alarm 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, and can be configured either
as NO or NC. The output channels for the Pre-Alarm and Alarm relays are offered as both a
changeover contact (Side A) and a Normally Open contact (Side B). The output channel for the Fault
relay is offered as both a changeover contact (Side A) and a Normally Closed contact (Side B). The
Side B contacts will be sufficient for most typical installations.
For example, the Side B contacts would typically be connected to the fire panel to indicate a fire
status. The Changeover contacts on Side A may be connected to a separate building management
system without any connectivity issues.
Wired Inputs
The following wired inputs are made available to the installer in this product:
-Power Cable to connect to mains power (100-240 VAC)
-Manual Activation Button to allow connection of a MAB to generate an Alarm and
subsequent gas release when the operator activates the MAB
-Door switch to allow connection of a door switch (to signal an opened cabinet door and to
inhibit gas release when the door of the cabinet is open) or a manual override switch (to
inhibit gas release when this switch is activated by an operator)
-Two RS485 bus interfaces to allow connection to other EXXFIRE®
750CNF/1500CNF/2250CNF systems; a maximum of 8 systems can be connected in a
daisy-chain configuration.
Relay
Primary Contacts
Fault/Alarm is active when
Fault
Normally Closed (passive state)
Contact is closed
Pre-Alarm
Normally Open (passive state)
Contact is closed
Alarm
Normally Open (passive state)
Contact is closed

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Configuration settings
The system has an array of DIP switches and a rotary switch for installer level configuration settings
for the following functions:
-Smoke sensitivity setting
-Extinguishing gas delay (time delay between Alarm and release of the gas)
-Time delay between gas release of multiple generators (only applicable for EXXFIRE®
1500CNF or 2250CNF)
-Flow monitoring sensitivity
-Configuration of Manual Activation Button
-Configuration of Door Switch
-Configuration of connected systems
The configuration settings are described in detail in Chapter 5.
Power Supply and battery back-up
The EXXFIRE®750CNF/1500CNF/2250CNF series are equipped with an internal power supply unit
and battery back-up that complies to EN54-4. The system can be powered by mains power 100/240
Vac. The battery back-up function allows continuation of system operation for 12 hours in case of
mains power interruption (based on fully charged battery).
Availability of mains power and battery status and health are monitored, and fault status is
activated in case of power interruption or battery problems.
Connection of multiple systems
An EXXFIRE®750CNF/1500CNF/2250CNF system can operate as a standalone system to protect
volumes up to 1.5/3.0/4.5m3.To allow protection of larger volumes, the EXXFIRE®
750CNF/1500CNF/2250CNF series are designed to enable connection of multiple systems (with a
maximum of 8) to protect volume up to 36 m3for 8 connected EXXFIRE®2250CNF systems.
Connected systems will functionally behave as one system: fire detection, gas release and system
alarm and fault status are synchronized for all connected systems. Each of the connected systems
is equipped with a smoke aspiration system, allowing multiple smoke detection points in the
protected volume. In case one of the connected systems generates a Alarm all systems will deploy
their gas simultaneously. A common system status (fault, pre-alarm and alarm status) is available
on the relay outputs, so that only one of the systems (the Master system) needs to be wired to a fire
alarm panel.
A RS485 communication bus is used to connect systems into a Master-Slave configuration, with one
Master system and up to 7 Slave systems. The systems are physically connected by a shielded fire
alarm cable. One of the connected systems will be configured as Master System and the others as
Slave Systems. A number of DIP switches and a Rotary Switch are provided for Access level 3
configuration settings.
The settings are described in Chapter 5.