FireFlex Systems Inc. N2 BLAST Installation guide

FireFlex: Preaction Double /
Interlocked Electric / Pneumatic
Release Self Contained
Fire Protection Systems
O&M Manual
FM-076B-0-6A
© 2020
The Leader in Nitrogen Generation Technology

FIREFLEX®N2BLAST®
Integrated Fire Protection System
OWNER'S OPERATION &MAINTENANCE MANUAL
Page ii FM-076B-0-6A
Copyright©2014
F IRE F LEX
®
Systems Inc .
All Rights Reserved
Reproduction or use, without express written permission from FIREFLEX Systems Inc, of any portion of this manual is prohibited.
While all reasonable efforts have been taken in the preparation of this manual to assure its accuracy, FIREFLEX Systems Inc
assumes no liability resulting from any errors or omissions in this manual, or from the use of the information contained herein.
FIREFLEX®N2Blast®is a registered trademark of FIREFLEX Systems Inc.
FIREFLEX Systems Inc. reserves the right to make changes to this manual and the data sheets herewith at any time, without prior
notification.

FIREFLEX®N2BLAST®
Integrated Fire Protection System
OWNER'S OPERATION &MAINTENANCE MANUAL
FM-076B-0-6A Page iii
Table of Contents
1. GENERAL.....................................................................................................................................................................1
1.1 APPLICABLE STANDARDS...................................................................................................................................................1
1.2 LISTINGS & APPROVALS......................................................................................................................................................1
1.3 ENVIRONMENT .....................................................................................................................................................................1
1.4 GENERAL DESCRIPTION .....................................................................................................................................................1
1.5 FEATURES.............................................................................................................................................................................2
1.6 CONFIGURATION..................................................................................................................................................................2
1.7 RELEASING ...........................................................................................................................................................................2
2. CORROSION INHIBITING SYSTEM............................................................................................................................3
2.1 NITROGEN GENERATOR .....................................................................................................................................................3
2.2 MODELS.................................................................................................................................................................................3
2.3 POWER REQUIREMENTS.....................................................................................................................................................3
2.4 N2Blast®Nitrogen generator...................................................................................................................................................3
2.5 BlastOff™ Leak Detection System.........................................................................................................................................3
2.6 N2Blast®AutoPurge System™...............................................................................................................................................3
2.7 Nitrogen generator..................................................................................................................................................................3
Air Pressure Maintenance Device..................................................................................................................................................3
3. PREACTION SYSTEM.................................................................................................................................................4
3.1 DESCRIPTION .......................................................................................................................................................................4
3.2 CONFIGURATION..................................................................................................................................................................4
3.3 RELEASE ...............................................................................................................................................................................4
4. INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS..........................................................................5
4.1 INSTALLATION ......................................................................................................................................................................5
4.2 PRELIMINARY INSPECTION.................................................................................................................................................5
4.3 PLACING SYSTEM IN SERVICE ...........................................................................................................................................6
4.4 AIR PRESSURE SETTINGS ..................................................................................................................................................6
4.4 SEQUENCE OF OPERATION................................................................................................................................................7
4.5 EMERGENCY INSTRUCTIONS.............................................................................................................................................7
4.6 PLACING THE SYSTEM BACK IN SERVICE AFTER OPERATION......................................................................................8
4.8 INSPECTIONS & TESTS........................................................................................................................................................9
4.9 MAINTENANCE....................................................................................................................................................................10
4.10 OPTIONAL SHUT-OFF VALVE AND SIGHT GLASS.........................................................................................................15
4.11 OPTIONAL SEMI-FLANGED INLET/OUTLET....................................................................................................................15

FIREFLEX®N2BLAST®
Integrated Fire Protection System
OWNER'S OPERATION &MAINTENANCE MANUAL
Page iv FM-076B-0-6A
5. PREACTION AIR SUPPLIES .....................................................................................................................................16
5.1 Direct air compressor (Style “A”)...........................................................................................................................................16
5.2 Air Pressure Maintenance Device (Style “B”)........................................................................................................................17
5.3 OPERATION.........................................................................................................................................................................18
5.3.1 Air supply Style "A" ............................................................................................................................................................18
5.3.2 Air supply Style "B" ............................................................................................................................................................18
5.4 MAINTENANCE AND INSPECTION ....................................................................................................................................19
5.4.1 Air supply style "A".............................................................................................................................................................19
5.4.2 Air supply Style "B" ............................................................................................................................................................20
6. CONTROLS................................................................................................................................................................23
6.1 PRODUCT DESCRIPTION...................................................................................................................................................23
6.2 REMOTE CONTROLED FIREFLEX®N2Blast®.......................................................................................................................23
7. WIRING DIAGRAMS .................................................................................................................................................25
8. LIMITED WARRANTY................................................................................................................................................26

FIREFLEX®N2BLAST®
Integrated Fire Protection System
OWNER'S OPERATION &MAINTENANCE MANUAL
FM-076B-0-6A Page 1 of 25
1. GENERAL
The FIREFLEX®N2Blast®integrated system consists of a
self contained preaction automatic sprinkler system
combined with a Nitrogen Generator, factory-assembled in
a single cabinet. All the components necessary for both
extinguishing systems are integrated.
1.1 APPLICABLE STANDARDS
In addition to being fabricated under stringent ISO-9001
manufacturing and quality control procedures, your
FIREFLEX N2Blast®complies with the following standards:
NFPA-13 Sprinkler Systems
NFPA-70 National Electrical Code
NFPA-72 Fire Alarm Systems
Before the installation, the contractor installing the unit shall
also be familiar with the following documents and
standards:
Applicable Local & State Building Codes
Any additional requirements of the Local Authority Having
Jurisdiction
1.2 LISTINGS & APPROVALS
In addition to being fabricated under tight ISO-9001
manufacturing and quality control procedures, the
FIREFLEX®N2Blast®uses UL/ULC and/or FM approved
components.
WARNING Any unauthorized modification or addition made
on-site to a factory built unit will void the unit's warranty.
Consult your nearest FireFlex Systems Authorized Distributor
before proceeding with such modifications or additions.
1.3 ENVIRONMENT
FIREFLEX®N2Blast®®unit shall be installed in a dry and
clean location. Verify that all equipments are properly
heated and protected to prevent freezing and physical
damage.
The unit and its components must be kept free of foreign
matter, freezing conditions, corrosive atmospheres,
contaminated water supplies, and any condition that could
impair its operation or damage the components.
1.4 GENERAL DESCRIPTION
The FIREFLEX®N2Blast®integrates the same type of
preaction automatic sprinklers system as found in the
renowned FIREFLEX Systems TOTALPAC®3using top
quality Viking Corporation components and the deluge
valve model F-1.
The Nitrogen generator is a N2Blast®Type 1 FPS-250
or FPS-750 system, made by South-Tek Systems.
The N2Blast®FPS-250 and FPS-750 designed &
manufactured by South-Tek Systems provide an
economical, precise means of generating high purity
Nitrogen. Since air is comprised of ~79% N2we simply
and cost-effectively separate the N2from the air.
Nitrogen is an inert gas (non-combustible) and widely
used in thousands of industries along with Fire
Protection Systems. The N2is “generated” by means of
the air compressor pushing air into the simple, safe
membrane element, which in turn mechanically
separates N2molecules from other molecules found
within air.
The FIREFLEX®N2Blast®cabinet is of the free-standing
type and is made of robust 14 gauge steel with a
rustproof fire red paint finish, polyester powder coated
and oven baked on a phosphate base. Each cabinet is
provided with two locked doors, reducing space
requirements for ease of installation and maintenance.

FIREFLEX®N2BLAST®
Integrated Fire Protection System
OWNER'S OPERATION &MAINTENANCE MANUAL
Page 2 of25 FM-076B-0-6A
1.5 FEATURES
Trouble-free design for safe and easy application
Available in 2 cabinet sizes
Uses South-Tek N2Blast®
Best value in nitrogen generation technology
Limits the liability of early pipe replacement
Significant cost savings by using black pipe in
combination with nitrogen
Uses the Viking deluge valve
Trim is fully assembled and tested at the factory
All trims are galvanized steel, Listed and
Approved for 250 psi (1724 kPa) service
maximum
Quick connections to water supply and drain on
left side, and sprinkler riser on top of unit, all
available with grooved end or flanged fittings
No open drain cup inside unit
Separate unlocked access hatch to emergency
manual release
Available with or without an integrated release
control panel
Compact, aesthetic and easy to move
User-friendly standardized owner's manual with
every unit
Unique serial number on every unit
Uses UL, ULC and/or FM Approved components
Designed in accordance with NFPA Standards
Sturdy 14 gauge steel cabinet painted fire red with
oven baked polyester powder on phosphate base
Textured rust proof finish
Neoprene gasket on all doors to eliminate
vibrations
Key-alike locks on all cabinet doors
Manufactured under ISO-9001 quality control
procedures
1.6 CONFIGURATION
FIREFLEX®N2Blast®Preaction systems are built around
the Viking trim using straight through deluge valves
Model F-1.
All the valves are rated up to a maximum of 250 psi
WWP (1724 kPa) max. and are available in the
following diameters:
f1½" (40 mm) f2" (50 mm) f3" (80 mm)
f4" (100 mm)
FIREFLEX®N2Blast®Preaction systems are supplied
with groove–groove deluge valves. Units with
flange/flange deluge valves are also available on
request.
The Nitrogen generator is a N2Blast®Type 1 FPS-250
or FPS-750system, made by South-Tek Systems.
1.7 RELEASING
Release trim for the double interlocked preaction
system with electric / pneumatic release utilizes a
normally closed solenoid valve (F1) controlled by the
Viking VFR-400 integrated control panel with a
compatible detection system (supplied by others) and a
pneumatic actuator (F3) normally held closed by
supervisory air pressure maintained in the sprinkler
piping.
In fire condition, when the detection condition is fulfilled,
the control panel energizes the solenoid valve (F1) and
an open sprinkler releases the supervisory air pressure
from the sprinkler piping. Both the electric detection
condition and supervisory pressure relieved from the
sprinkler piping are necessary before the deluge
valve (A1) will open and fill the sprinkler piping with
water. Water will flow from any opened sprinklers in the
system piping.

FIREFLEX®N2BLAST®
Integrated Fire Protection System
OWNER'S OPERATION &MAINTENANCE MANUAL
FM-076B-0-6A Page 3 of 25
2. Corrosion Inhibiting System
2.1 NITROGEN GENERATOR
The N2Blast®Corrosion Inhibiting System produces 98%+
pure Nitrogen on demand and introduces it to the preaction
Fire Protection System. In doing so, Oxygen and moisture
are displaced from the piping through the AutoPurge
System™. The N2Blast®Nitrogen Generation System
effectively inhibits Electrochemical, Galvanic and
Microbiologically Influenced Corrosion (MIC), as well as
freezeups and ice plugs.
All personnel involved with installation, operations, and
maintenance of the N2Blast®must follow safe working
practices, OHSA, and local health/safety code regulations
during the installation, operation, and maintenance of the
unit.
2.2 MODELS
FPS-250 “Type 1” Nitrogen Generator
Handles up to 250 gallons of sprinkler pipe capacity
Fully automatic with pressure switch
Pre-filters and pressure regulator
Control panel with gauges, hourmeter and power
switch
FPS-750 “Type 1” Nitrogen Generator
Handles up to 750 gallons of sprinkler pipe
capacity
Fully automatic with pressure switch
Pre-filters and pressure regulator
Control panel with gauges, hourmeter and power
switch
2.3 POWER REQUIREMENTS
Connect the N2-BLAST® to an electrical supply following all
local safety regulations. Ensure the unit is supplied with
110V/60Hz power rated at 20 amp service. The unit must
be grounded.
2.4 N2Blast®Nitrogen generator
South-Tek Systems utilizes Membrane technology in
the N2-Blast® Corrosion Inhibiting Systems in order to
efficiently separate Nitrogen molecules from the air we
breathe. Membrane technology, used in our smaller
applications, has a simple air flow design, is wall-
mounted and easy to service. PSA technology is more
cost effective and energy efficient in larger Fire
Protection Systems, those requiring more Nitrogen to
compensate for the NFPA “acceptable leak rate”.
2.5 BlastOff™ Leak Detection System
Unless the leak rate is catastrophic, the supervisory low
pressure alarm on the FPS will not activate. Minor leaks
cause the air compressor and N2Blast®to run
excessively in order to maintain supervisory pressure.
The unnecessary additional run-time decreases the
lifespan of the equipment. The Patent Pending
BlastOff™ Leak Detection System is designed to detect
significant leaks before they compromise the Fire
protection System and the Nitrogen Generation System.
It has an internal audible alarm and dry contact for
wiring into the Building Monitoring System (BMS) and
will also alarm if the air compressor or the N2-Blast® is
not working properly.
2.6 N2Blast®AutoPurge System™
High purity Nitrogen must be equally distributed
throughout the entire sprinkler piping system in order to
effectively inhibit corrosion. The Patent Pending
AutoPurge System™provides a low volume, constant
purge of Nitrogen within sprinkler piping. The rate in
which gas is evacuated from the sprinkler piping is
within NFPA guidelines and allows breathing to occur.
The AutoPurge System™ also assists in drying out the
residual water from a hydrotest. Computational Fluid
Dynamics modeling proves that this is the most
effective way to ensure that high purity Nitrogen
reaches all branches within the sprinkler piping. Install
one AutoPurge System™ per system at a high point .
2.7 Nitrogen generator
Air Pressure Maintenance Device
Nitrogen air pressure maintenance device is a Viking
Model D-2 air pressure maintenance device. It is used
to regulate the nitrogen pressure in the sprinkler piping
at the specified system pressure for FIREFLEX®N2
Blast®Double interlock preaction system.
The Viking Model D-2 air pressure maintenance device
is a pressure regulator that automatically reduces the
supply air pressure to a preset requirement when
connected to a constantly maintained air supply.

FIREFLEX®N2BLAST®
Integrated Fire Protection System
OWNER'S OPERATION &MAINTENANCE MANUAL
Page 4 of25 FM-076B-0-6A
3. PREACTION SYSTEM
3.1 DESCRIPTION
The preaction system in the FIREFLEX®N2Blast®integrated
fire protection system by FIREFLEX Systems Inc. consists of
a preaction system trim totally pre-assembled, pre-wired
and factory tested. All electrical and mechanical
components of the system are contained in one single unit.
The only connections required for installation are the water
supply inlet, water discharge outlet, main drain, the
electrical detection and alarm connections, as well as the
AC power line(s). The discharge outlet is connected to a
fixed piping system of automatic sprinklers. Water is the
extinguishing agent.
The sprinklers network is supervised with compressed air
or gas. If the sprinklers piping or sprinkler is broken, the
deluge valve will not open.
3.2 CONFIGURATION
The FIREFLEX®N2Blast®®preaction system is built around
the Viking trim using deluge valve model F-1.
The valve is rated up to a maximum of 250 psi (1724 kPa)
working water pressure max. and is available in the
following diameters:
f1½" (40 mm) f2" (50 mm) f3" (80 mm)
f4" (100 mm)
3.3 RELEASE
Release trim for the electric / pneumatic operated
double interlocked preaction system utilizes a normally
closed solenoid valve (F1) controlled by the Viking
VFR-400 integrated control panel with a compatible
detection system (supplied by others) and a pneumatic
actuator (F3) normally held closed by supervisory air
pressure maintained in the sprinkler piping.
In fire condition, the release control panel energizes the
solenoid valve (F1) and an open sprinkler releases the
supervisory air pressure from the sprinkler piping. Both
the electric detection condition and supervisory
pressure relieved from the sprinkler piping are
necessary before the deluge valve (A1) will open and fill
the sprinkler piping with water. Water will flow from any
opened sprinklers in the system piping.
Note: If the detection system does not operate properly,
the deluge valve (A1) will not open.
To prevent false discharge, if the detection system
operates alone due to fire, damage or malfunction, the
deluge valve (A1) will not open. If the sprinkler piping is
damaged or a sprinkler is broken or fused, the deluge
valve (A1) will not open either.

FIREFLEX®N2BLAST®
Integrated Fire Protection System
OWNER'S OPERATION &MAINTENANCE MANUAL
FM-076B-0-6A Page 5 of 25
4. INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS
4.1 INSTALLATION
IMPORTANT The FIREFLEX®N2Blast®unit IS NOT
designed to be installed in area subject to freezing
conditions. Refer to section 1.3 ENVIRONMENT for
additional details.
1. Install the cabinet (refer to section 8 CABINET).
IMPORTANT THE CABINET MUST BE FIRMLY
ANCHORED TO THE FLOOR USING ALL ANCHORING
HOLES.
2. Install the automatic sprinkler piping, detection and
signaling circuits (if applicable) in accordance with
applicable standards.
3. Connect all detection and signaling devices, where
applicable, according to electrical schematics (refer
to section 7 WIRING DIAGRAMS).
4. Connect the AC power for the optional air
compressor and the Corrosion Inhibiting System in
the electric distribution panel (refer to section 7
WIRING DIAGRAMS).
5. Conform to local municipal or other codes regarding
installations of fire protection systems.
6. Place the system in service (refer to chapters 4.2
PRELIMINARY INSPECTION & 4.3 PLACING
SYSTEM IN SERVICE).
7. If the system does not operate as it should, make the
necessary corrections according to manuals issued
or consult your distributor or FIREFLEX Systems Inc.
8. Make sure that building owner or a delegated
representative has received instructions regarding
the operation of the system.
4.2 PRELIMINARY INSPECTION
See figures 4.3 & 4.4 at the end of the current section.
1. Cabinet shall be firmly anchored to the floor.
2. Open door to mechanical section.
3. N2Blast®air pressure maintenance device ball valve
shall be close
4. Main water supply control valve (D1) should be
closed.
5. Priming valve (B1) must be closed.
6. Air supply must be CLOSED (refer to section 5
PREACTION AIR SUPPLIES).
7. All indicating light shall be off, on the nitrogen
generator.
8. Drain test valve (B6) and main drain valve (D3) must
be closed.
9. Alarm test valve (B5) must be closed.
10. All gauges (B11, B12 and E3) should read 0 psi.
11. Using the built-in contractor's hydrostatic test ports
(see figure 4.3), fill sprinklers network with water and
maintain pressure as per NFPA-13 requirements.
WARNING Do not subject the air pressure gauges to
hydrostatic pressures above 250 psi (1724 kPa). Close
gauge valves before proceeding with hydrostatic test.
12. Correct leaks if any before completing test. OPEN
main drain valve (D3) to completely drain the
sprinklers network.

FIREFLEX®N2BLAST®
Integrated Fire Protection System
OWNER'S OPERATION &MAINTENANCE MANUAL
Page 6 of25 FM-076B-0-6A
4.3 PLACING SYSTEM IN SERVICE
1. Verify that the system has been properly drained.
Main water supply control valve (D1) is CLOSED.
Main drain valve (D3) is OPEN. Emergency release
valve (B10) is CLOSED.
2. CLOSE main drain valve (D3).
3. OPEN priming valve (B1).
4. Air supply shall be OPENED to restore supervisory
pressure to sprinkler piping.
Note: On systems provided with an air pressure
maintenance device (air option style "B"), verify that
the ½" by-pass valve (E8) in the air pressure
maintenance device trim is CLOSED and that both ¼"
valves (E6 & E7) are OPEN.
5. Nitrogen generator compressor will come on and the
“Operating” green light will illuminate until the N2
storage tank pressure reaches maximum
(approximately 75 Psi) and the compressor shuts off.
6. OPEN drain test valve (B6).
7. PARTIALLY OPEN main water supply control
valve (D1).
8. When full flow develops from the drain test
valve (B6), CLOSE the drain test valve and verify that
there is no flow from the drip check valve (B7) when
the plunger is pushed.
9. FULLY OPEN the main water supply control
valve (D1).
10. Verify that the alarm test valve (B5) is CLOSED and
that all other valves are in their "normal" operating
position.
11. Depress the plunger of the drip check valve (B7). No
water should flow when the plunger is pushed.
12. Check and repair all leaks.
13. When the N2storage tank pressure reaches
maximum (approximately 75 Psi) Nitrogen generator
compressor will come off and the “Standby” amber
light will illuminate.
14. Make sure the Nitrogen generator air pressure
maintenance device valve is open. (see figure 4.2 or
4.4)
15. Perform sequence of operation (refer to chapter 4.4).
4.4 AIR PRESSURE SETTINGS
- Preaction compressor start @ 20 Psi
- Preaction compressor stop @ 35 Psi
- Preaction low air pressure switch is set at 25 Psi
- Nitrogen generator storage tank is filled @ 75 Psi
- Nitrogen generator air pressure maintenance device
is set @ 35 Psi
Note: all pressure setting has a 5% tolerance

FIREFLEX®N2BLAST®
Integrated Fire Protection System
OWNER'S OPERATION &MAINTENANCE MANUAL
FM-076B-0-6A Page 7 of 25
4.4 SEQUENCE OF OPERATION
4.4.1 Automatic release
1. Actuation of a detector from one detection zone:
a) “ZONE 1” (or “ZONE 2”) activates.
b) "ALARM" audible devices activate.
c) “ALARM” contacts activate.
d) Preaction solenoid valve (F3) activates.
Note: Preaction piping network will not yet be filled with
water.
2. After a preaction sprinkler head fuses:
a) Pneumatic actuator (F3) will operate
b) Deluge valve (A1) opens; water will flow into
sprinkler piping network and out of sprinklers
and any openings on the system.
c) Alarm devices (C1 & C2) will operate.
d) “WATERFLOW PREACTION” contact activates.
4.4.2 Manual release
Anytime the handle of the Emergency Release Valve
(B10) is pulled, pressure is released from the priming
chamber.
a) Deluge valve (A1) opens; water will flow into
sprinkler piping network and out of sprinklers
and any openings on the system.
b) Alarm devices (C1 & C2) will operate.
c) “WATERFLOW PREACTION” contact activates.
4.4.4 System supervisory
Actuation of a supervisory device such as low pressure
switch or valve in wrong position within the system:
a) "SUPERVISORY” contact activates.
4.5 EMERGENCY INSTRUCTIONS
To take system out of service:
WARNING Placing a system out of service may eliminate
the fire protection capabilities of the system. Prior to
proceeding, notify all Authorities Having Jurisdiction.
Consideration should be given to employ a fire patrol in the
affected areas.
After placing the system out of service has been
authorized by the appropriate Authority Having
Jurisdiction:
1. Turn the releasing circuit disable switch to
DISABLED before doing any tests on the system
(see figure 4.2).
2. Close main water supply control valve (D1).
3. Open system main drain valve (D3).
Note: Electric alarms controlled by a pressure switch
installed in the ½" (15mm) NPT connection (C2) for a non-
interruptible alarm pressure switch cannot be shut-off until
the deluge valve (A1) is reset or taken out of service.
4. Shut-off the air supply (refer to section 5
PREACTION AIR SUPPLIES).
5. Open drain test valve (B6).
6. Close priming valve (B1).
7. Sprinklers network that has been subjected to a fire
must be returned to service as soon as possible. The
entire system must be inspected for damage, and
repaired or replaced as necessary.
8. Replace any sprinklers that have opened, been
damaged, or have been exposed to fire conditions.
9. Replace any detectors that have been damaged.
10. Return the system to service as soon as possible.
Perform chapter 4.3 PLACING SYSTEM IN
SERVICE.
11. Turn the releasing circuit disable switch to NORMAL
(see figure 4.2).

FIREFLEX®N2BLAST®
Integrated Fire Protection System
OWNER'S OPERATION &MAINTENANCE MANUAL
Page 8 of25 FM-076B-0-6A
4.6 PLACING THE SYSTEM BACK IN SERVICE AFTER
OPERATION
See figures 4.3 & 4.4 at the end of the current section.
1. Verify that the system has been properly drained.
Main water supply control valve (D1) is CLOSED.
Main drain valve (D3) is OPEN. Emergency release
valve (B10) is CLOSED.
2. CLOSE main drain valve (D3).
3. OPEN priming valve (B1).
4. Restore supervisory pressure to sprinkler piping.
Note: On systems provided with an air pressure
maintenance device (air option style "B"), verify that
the ½" by-pass valve (E8) in the air pressure
maintenance device trim is CLOSED and that both ¼"
valves (E6 & E7) are OPEN.
5. Nitrogen generator compressor will come on and the
“Operating” green light will illuminate until the N2
storage tank pressure reaches maximum
(approximately 75 Psi) and the compressor shuts
off.Reset the remote release control panel. Solenoid
valve (F1) should close.
6. OPEN drain test valve (B6).
7. PARTIALLY OPEN main water supply control
valve (D1).
8. When full flow develops from the drain test
valve (B6), CLOSE the drain test valve.
9. Verify that there is no flow from the drip check
valve (B7) when the plunger is pushed.
10. FULLY OPEN the main water supply control valve
(D1).
11. Verify that the alarm test valve (B5) is CLOSED and
that all other valves are in their "normal" operating
position.
12. Depress the plunger of the drip check valve (B7). No
water should flow from the drip check when the
plunger is pushed.
13. Check and repair all leaks.
14. Notify the Authority Having Jurisdiction, remote
station alarm monitors, and those in the affected area
that the system is back in service.

FIREFLEX®N2BLAST®
Integrated Fire Protection System
OWNER'S OPERATION &MAINTENANCE MANUAL
FM-076B-0-6A Page 9 of 25
4.8 INSPECTIONS & TESTS
NOTICE: THE OWNER IS RESPONSIBLE FOR
MAINTAINING THE FIRE PROTECTION SYSTEM AND
DEVICES IN PROPER OPERATING CONDITION.
The purpose of the periodic inspection and tests is to
insure that the system is operating satisfactory and to
identify problems that could adversely affect the
performance of the system. Inspection and tests of the
system shall be accomplished in accordance with
NFPA-25 and NFPA-72. At least annually, the system
shall be thoroughly inspected and tested for proper
operation by competent personnel. In addition, the
Authority Having Jurisdiction may have additional
maintenance, testing, and inspection requirements that
must be followed.
WARNING Any system maintenance that involves placing
the system out of service may eliminate the fire protection
capabilities of that system. Prior to proceeding, notify all
Authorities Having Jurisdiction.
Records
Records of inspections, tests, and maintenance of the
system and its components shall be made available to
the Authority Having Jurisdiction upon request. Typical
records include, but are not limited to, detection system,
valve inspections, trip tests of deluge valve.
Acceptance test records should be retained for the life of
the system. Subsequent test records should be retained
for a period of 1 year after the next test. The comparison
determines deterioration of system performance or
condition and the need for further testing or maintenance.
4.8.1 Preaction low air pressure supervisory test
To test preaction system “low air” supervisory:
Note: To prevent operation of the deluge valve (A1) and
filling of the sprinkler piping with water during the test,
CLOSE main water supply control valve (D1) and OPEN
drain test drain (B6).
1. Slowly open the Inspectors test valve or the main
drain valve (D3).
2. Verify that low air supervisory operate within pressure
setting from table 5.3.
3. Close the Inspectors test valve or the main drain
valve (D3).
4. Establish recommended air pressure.
5. Reset the remote releasing control panel.
When testing is complete, return the system to service:
1. Verify that the pressure indicated on pressure
gauge (B11) indicates that the priming chamber is
pressurized with system water supply pressure
indicated on pressure gauge (B12).
2. OPEN drain test valve (B6).
3. PARTIALLY OPEN main water supply control
valve (D1).
4. When full flow develops from flow test valve, CLOSE
the drain test valve (B6).
5. FULLY OPEN and secure the main water supply
control valve (D1).
6. Verify that the alarm test valve (B5) is CLOSED and
that all other valves are in their "normal" operating
position (see figure 4.3).
7. Verify that there is no flow from the drip check
valve (B7) when the plunger is pushed.
4.8.2 Preaction full flow trip test
Performance of a trip test is recommended annually
during warm weather. Consider coordinating this test
with operation testing of the releasing devices.
Caution Performance of this test will cause the deluge
valve (A1) to open and the sprinkler system to fill with
water.
To trip test the preaction system:
1. Notify the Authority Having Jurisdiction and those in
the area affected by the test.
2. To trip the deluge valve (A1):
Fulfill the electric releasing condition (refer to
chapter 1.7.1).
Open the sprinkler system inspectors test valve
or the main drain valve (D3).
OR Open the door of emergency release (B10)
and pull the handle.
3. The deluge valve (A1) should open, filling the
sprinkler system with water. Water flow alarms
should operate.
4. Verify adequate flow from the sprinkler system
inspectors test valve within an acceptable time
period.
When trip testing is complete:
Perform steps 5 through 7 of chapter 4.5 EMERGENCY
INSTRUCTIONS.
Perform steps 7 through 20 of chapter 4.6 PLACING THE
SYSTEM BACK IN SERVICE AFTER OPERATION.
Notify the Authority Having Jurisdiction and those in the
affected area that testing is complete.

FIREFLEX®N2BLAST®
Integrated Fire Protection System
OWNER'S OPERATION &MAINTENANCE MANUAL
Page 10 of25 FM-076B-0-6A
4.8.3 Main drain test
A main drain test shall be conducted to determine
whether there has been a change in the condition of the
water supply piping and control valves (as per NFPA25).
1. Record the water supply pressure indicated by the
pressure gauge (B12).
2. FULLY OPEN the drain test valve (B6).
3. Record residual water supply pressure indicated by
the pressure gauge (B12).
4. SLOWLY CLOSE the drain test valve (B6).
5. Record the water supply pressure indicated by the
pressure gauge (B12).
6. Readings shall be compared with those made at the
time of the original acceptance tests or with those
made at the time of the last test to determine whether
there has been any deterioration of the water supply.
Note: A main drain test shall be conducted any time the
water supply control valve (D1) is closed and reopened at
the system.
4.8.4 Monthly inspection
1. Gauges on preaction system shall be inspected to
ensure that normal air and water pressures are being
maintained.
2. Verify that the control valves are in the following
condition:
In the normal open or closed position.
Properly supervised.
Accessible.
Free from external leaks.
3. The deluge valve (A1) and associated components
shall be externally inspected to verify the following:
The valve is free from physical damage.
All trim valves are in the appropriate open or
closed position.
The valve seat is not leaking.
Electrical components are in service.
4. Check alarm device (C1) switch by opening the alarm
test valve (B5).
5. Conduct low air pressure supervisory test (refer to
chapter 4.8.1).
6. Refer any noted problems or deficiencies to
authorized service personnel for correction.
4.8.5 Semi-annual inspection
1. Check main water supply control valve (D1) switch
upon movement of the hand wheel.
2. Check alarm device (C1) switch by opening the alarm
test valve (B5).
3. Check the sprinklers piping for corrosion and
damage.
4. Check all piping supports to insure they are tight and
properly secured.
5. Perform functional test of all components of the
system.
WARNING Prior to any functional tests, the actuator (C)
must be removed to prevent cylinder (A) discharge.
4.8.6 Annual inspection
1. Perform semi-annual inspection.
2. Check all detectors at the remote releasing control
panel.
3. Check all releasing conditions.
4. Check all audible & visual devices at the remote
releasing control panel.
5. Perform sequence of operation (refer to chapter 4.4).
6. Perform manual emergency release test of the
preaction system.
7. Perform full trip test.
8. Perform drain test.
4.8.7 Long term inspection
1. Alarm valves and their associated strainers, filters,
and restriction orifices shall be inspected internally
every 5 years unless tests indicate a greater
frequency is necessary.
2. Riser check (D2) shall be inspected internally every
5 years unless tests indicate a greater frequency is
necessary.
3. Test on gauge (gauge precision required: less than
3% of the full scale).
4.9 MAINTENANCE
The system shall be maintained in full operation condition
at all times.
All troubles or impairments shall be corrected promptly
consistent with the hazard being protected.
The N2Blast®FPS-250 and FPS-750 utilize three
different filters, seen in the figure to the right. The filters
must be changed out annually or every 1000 hours (hour
meter located on the outside bottom right corner of the
cabinet) of operating time, whichever comes first.
(please refer to South-Tek manual for details)

FIREFLEX®N2BLAST®
Integrated Fire Protection System
OWNER'S OPERATION &MAINTENANCE MANUAL
FM-076B-0-6A Page 11 of 25
Figure 4.1 – P&ID
Tank Provided
with brackets and Strap
Riser towards the nozzles
N2Blast
Compressor
Air Maintenance Device/s
(AMD/s) Supplied by Fireflex
Preaction
Compressor
Preaction
Air Kit
Preaction
System
Low Air
Pressure Switch
Autopurge System
Sprinkler
Nitrogen
Air

FIREFLEX®N2BLAST®
Integrated Fire Protection System
OWNER'S OPERATION &MAINTENANCE MANUAL
Page 12 of25 FM-076B-0-6A
Figure 4.2 - FIREFLEX®N2Blast®(shown without doors)
FM-06LM-0-1A-4FM-06LM-0-1A-4
See figures 4.3 & 4.4 for additional details.

FIREFLEX®N2BLAST®
Integrated Fire Protection System
OWNER'S OPERATION &MAINTENANCE MANUAL
FM-076B-0-6A Page 13 of 25
Figure 4.3 - FIREFLEX®N2Blast®- Double interlocked Electric/Pneumatic preaction trim
FM-06LM-0-1A-1FM-06LM-0-1A-1
D1
2
Components:
A1 Deluge valve
B1 Priming valve
B2 Strainer
B3 1/16" Restricted orifice
B4 Spring loaded check valve
B5 Alarm test valve
B6 Drain test valve
B7 Drip check valve
B8 Drain check valve
B9 Pressure operated relief valve (PORV)
B10 Emergency release valve
B11 Prime pressure water gauge & valve
B12 Water supply pressure gauge & valve
B13 Clapper check valve
C1 Alarm pressure switch
C2 Connection to water motor gong (strainer
supplied by contractor)
D1 Water supply control valve
D2 Riser check valve
D3 Main drain valve
F1 N.C solenoid valve (24Vdc)
F3 Pneumatic actuator

FIREFLEX®N2BLAST®
Integrated Fire Protection System
OWNER'S OPERATION &MAINTENANCE MANUAL
Page 14 of25 FM-076B-0-6A
Figure 4.4 - FIREFLEX®N2Blast®- storage tank
FM-06LM-0-1A-1FM-06LM-0-1A-1
N1 Nitrogen generator air pressure maintenance device
N2 Nitrogen generator air pressure maintenance device control valve
N3 Storage cylinder pressure gauge
N4 Storage cylinder outlet valve
N5 Storage cylinder inlet valve

FIREFLEX®N2BLAST®
Integrated Fire Protection System
OWNER'S OPERATION &MAINTENANCE MANUAL
FM-076B-0-6A Page 15 of 25
4.10 OPTIONAL SHUT-OFF VALVE AND SIGHT GLASS
The shut-off valve & sight glass option is intended to be
used for applications where testing of the system operation
without filling the sprinkler piping network is desirable and
where it is critical that all functions of the preaction system
be tested under actual discharge conditions.
Operation of the shut-off valve
Inspection of the system can be implemented without filling
the sprinkler piping system with water.
1. CLOSE the shut-off valve (D4).
2. OPEN the main drain valve (D3).
3. Simulate the operation of the system to open the
deluge valve (A1) (refer to chapter 4.8.6 ANNUAL
INSPECTION). Verify that water flows through the
sight glass assembly (D5).
4. Once tests are completed, make sure the main drain
valve (D3) is completely CLOSED. Reset the system
(refer to chapter 4.6 PLACING THE SYSTEM BACK IN
SERVICE AFTER OPERATION).
5. FULLY OPEN the system shut-off valve (D4). Reset
the remote releasing control panel.
Figure 4.7 - Shut-off valve option
Main Drain
Valve (D3)
Deluge (A1) or
Flow Control (A2)
Valve
Supervised
Shut-off Valve (D4)
Sight Glass
Assembly (D5)
Riser Check
Valve (D2)
Point flash light here
Supervised
Water Supply
Control Valve (D1)
FM-061H-0-75B
4.11 OPTIONAL SEMI-FLANGED INLET/OUTLET
When required by the user, FIREFLEX®N2Blast®unit
can be provided in a semi-flanged configuration.
The semi flanged option provides flanged fittings only
on the water inlet pipe (left side) and on the system
riser outlet. The drain manifold is provided with a
threaded connection (left side). The rest of the fittings
are the same as usual with the main components being
provided in the standard flanged / grooved
configuration.
Figure 4.8 - Semi-flange option
Flanged fitting outside cabinet
(when provided)
Field connection
to Water Supply
(specify side)
Threaded end
Field Connection
to Open Drain
(specify side)
Flanged fitting outside cabinet
(when provided)
FM-061H-0-77B

FIREFLEX®N2BLAST®
Integrated Fire Protection System
OWNER'S OPERATION &MAINTENANCE MANUAL
Page 16 of25 FM-076B-0-6A
5. PREACTION AIR SUPPLIES
5.1 Direct air compressor (Style “A”)
Used only for the sprinkler piping network of the preaction
system. Air supply style "A" includes the air compressor
mounted inside the FIREFLEX®N2Blast®cabinets with its
supervisory trim and options. Compressors are of the
tankless, oiless piston type and are factory piped to the
sprinkler system riser, all within the FIREFLEX®N2Blast®
cabinets.
Compressors are available in four (4) sizes:
1/6HP 1/2HP
1/3HP 1HP
3
TO PNEUMATIC ACTUATOR
(plugged when not used)
E4
(plugged with
SureFire trim)
TO SPRINKLER RISER
E9
E10
Copper tubing
E12
E3
E1
This section replaced
by Dehydrator option A
(when used)
TO OPTIONAL ACCELERATOR
(plugged when not used)
FM-061H-0-118B
1
CONTRACTOR'S
HYDROSTATIC TEST PORT
(system side)
2
E2
E11
TO DRAIN COLLECTOR
Compressor Service Factor Amp (S.F.A) rating
Compressor
Size (HP) 115Vac / 60Hz 230Vac / 60Hz 220Vac / 50Hz
1/6 5.0 Amp. 2.5 Amp. 1.3 Amp.
1/3 7.4 Amp. 3.7 Amp. 2.5 Amp.
1/2 10.0 Amp. 5.0 Amp. 4.0 Amp.
1 18.0 Amp. 9.0 Amp. 6.0 Amp.
115 / 230 Vac – 60Hz air compressor selection Table:
H.P CFM
@
40 PSI
System capacity to
fill system to 35 PSI
in 30 minutes *
System capacity to
fill system to 55 PSI
in 30 minutes **
1/6 1.33 142 gal. 90 gal.
1/3 2.61 285 gal. 181 gal.
1/2 4.06 417 gal. 265 gal.
1 7.40 702 gal. 447 gal.
* For systems with maximum water supply
pressure of
175 PSI (1206 kPa)
** For systems with water supply pressure
between
175 PSI (1207 kPa) and 250 PSI (1724 kPa)
WARNING The information contained herewith is for
estimation and evaluation purposes only. Its use remains
the responsibility of the designer.
Table 5. - Pressure adjustments
System type Air supply
style Air regulator Compressor Start Compressor Stop Low air supervisory
A n/a
20 psi
(1.38 bar) 35 psi (2.42 bar) 25 psi (1.73 bar)
Double interlocked
electric/pneumatic
Water pressure up to
175 psi (12.1 bar) B 35 psi
(2.42 bar) n/a n/a
25 psi
(1.73 bar)
A n/a
40 psi
(2.76 bar) 55 psi (3.80 bar) 45 psi (3.11 bar)
Double interlocked
electric/pneumatic
Water pressure 175 to
250 psi (12.1 to 17.2 bar) B 55 psi
(3.80 bar) n/a n/a
45 psi
(3.11 bar)