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.
