South-Tek Systems N2 Blast FPS-900-RS User manual

FPS-900-RS
Fire Protection Systems
O&M Manual
Version 3; 3/2020

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TABLE OF CONTENTS:
1. INTRODUCTION…………………………………………………………………………………………. 3
1.1. General Purpose
1.2. Audience
1.3. Important Information
1.4. Limits of Liability
1.5. Service Return Policy
2. SAFETY GUIDELINES……………………………………………………………………………………5
2.1. General
3. RECEIVING, UNPACKING, AND STORAGE INSTRUCTIONS…………………………………….. 7
3.1. Unpacking and Preparation
4. SITE AND UTILITY REQUIREMENTS…………………………………………………………………. 8
4.1. Air Supply
4.2. Additional Piping’s and Hosing’s
4.3. Electrical Requirements
4.4. Site Specifications
5. PRODUCT INSTALLATION………………………………………………………………………………9
5.1. Installation Arrangement
6. SYSTEM DESIGN ………………………………………………………………………………………..11
6.1. Key Features
6.2. Specifications
7. SYSTEM OPERATION …………………………………………………………………………………..13
7.1. General
7.2. Controller Modes
7.3. Normal Run / Standby Mode
7.4. Stopping the System
7.5. Alarm Mode
7.6. Communication (Modbus RTU)
8. START-UP PROCEDURES ……………………………………………………………………………..18
8.1. Start-Up Procedures
8.2. Checking for Leaks
9. SYSTEM MAINTENANCE ……………………………………………………………………………….21
9.1. Air Intake Filter
9.2. Air Filter Replacement
10. KEY CONTACTS …………………………………………………………………………………………23
11. FAQs ……………………………………………………………………………………………………….24
11.1. Power Issues
11.2. Pressure Issues
11.3. Gas Leaks
APPENDIX A: Advanced Options ……..…………………………………………………………………….25
APPENDIX B: WARRANTY ………………………………………………………………………………….28

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1. Introduction
1.1. General Purpose
This manual provides proper installation and use of South-Tek Systems
N2-BLAST
® FPS-900-RS. South-Tek Systems is not responsible for damages when using this in
manners not approved by South-Tek Systems. The user(s) of this document should confer any
questions with a qualified South-Tek Systems representative on its commissioning and correct use.
Please contact South-Tek Systems with any question or concerns at:
South-Tek Systems, LLC
3700 U.S. Highway 421 North
Wilmington, NC, 28401
Tel: [phone]
Email: [e-mail]
http://www.southteksystems.com/
This document is based upon the R&D performed by the South-Tek Systems Engineering Team.
WARNING: Read the manual in its entirety before installing or using the equipment.
1.2. Audience
This manual is for Installer/Supervisory Staff. Read the entire manual before operating. Please contact
the local provider for any operation and maintenance questions before contacting the manufacturer.
1.3. Important Information
All personnel (and their supervisors) installing, operating, and maintaining the N2-BLAST
®
must read
and fully understand this manual prior to installing, operating or performing maintenance.
The N2-BLAST
® produces nitrogen (N2) at a low flow rate, which quickly dissipates into the air. N2gas is
not poisonous, but do not directly inhale, since high concentrations can cause asphyxiation. Install the
unit in a well-ventilated room that is not sealed off from normal living space air changes.
All personnel involved with the installation, operations, and maintenance of the N2-BLAST
® must follow
safe working practices, including OHSA and local health/safety code regulations.
1.4. Limits of Liability
Buyer’s exclusive remedy for all claims shall be for damages, and seller’s total liability for any and all
losses and damages arising out of any cause whatsoever including, without limitation, defects in or
defective performance of the system, (whether such claim be based on contract, negligence, strictly
liability, other tort or otherwise) shall in no event exceed the purchase price of the system in respect of
which such cause arises or, at seller’s option, the repair or replacement of such; and in no event shall
seller be liable for incidental, consequential or punitive damages resulting from any such cause.

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Seller shall not be liable for, and Buyer assumes all liability for, the suitability and the results of using
nitrogen by itself or in any manufacturing or other industrial process or procedure, all personal injury and
property damages connected with the possession, operation, maintenance, other use or resale of the
System. Transportation charges for the return of the System shall not be paid unless authorized in
advance by Seller.
NOTE: Any MODIFICATIONS made by the customer, without the written consent of South-Tek
Systems, will void the product’s warranty.
1.5. Service Return Policy
Follow these procedures to return the system when performing site repairs is not possible:
•The owner must get a Return Material Authorization number, which references the model and
serial, from South-Tek Systems. South-Tek Systems will not accept any items for service or
credit without written authorization from South-Tek Systems.
•Return all items within the original packaging material if possible. Package all items for safe
return to South-Tek Systems. South-Tek Systems will not be responsible for damages, which
occur in transit. Damages occurred from failing to adhere to these procedures will be the
customer’s responsibility. Contact South-Tek Systems for a return shipping address.
•Shipping charges must be prepaid on all returns.

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2. Safety Guidelines
The following section outlines the basic safety considerations about installation and operation of the N2-
BLAST
® FPS-900-RS.
2.1. General
Using the N2-BLAST
® FPS-900-RS correctly is important for safety and trouble-free operation. Wrong
use can cause damages to the system or can lead to incorrect gas supply.
Read carefully and act accordingly before installing, operating, or repairing the unit:
•The operator must use safe working practices and rules when running the nitrogen generator.
•The owner is responsible for always keeping the unit in safe working conditions.
•Always use approved parts when performing maintenance and repairs. Make sure that
replacement parts meet or exceed the original parts’ specifications.
•Only competent individuals, trained and authorized, can install, operate, or perform
maintenance and repairs.
•Isolate incoming and outgoing pressures to the generator, and depressurize the service or
repair section before performing any mechanical work, including changing the filters. Vent the
nitrogen generator’s exhaust gas outside or to a large, well-ventilated room to avoid suffocation
due to lack of oxygen.
•Wear safety glasses if the cabinet door is open while the machine is running.
•Use ear protection when the equipment is running.
WARNING: Components may experience pressure during operation. Pressurized gases are
dangerous and may cause injury or death if handled or used inappropriately.
•Never allow pressurized gas to exhaust from an unsecured hose. An unsecured hose may
present a whipping action, which can cause serious injury. If a hose burst during use,
immediately close all isolation valves if safe and turn off the unit.
•Never disable or bypass any safety relief valves.
•Always disconnect the supply power to the nitrogen generator prior to performing electrical
work.
NOTE: Always follow local and site safety regulations in conjunction with this manual. Correct use of the
nitrogen generator is important for personal safety. Incorrect safety practices can cause damage to the
individual and equipment.
Follow safe working practices, OSHA, and local health and safety regulation when installing and
maintaining the N2-BLAST
® FPS-900-RS.
WARNING: Read the manual before installing and operating the nitrogen generator to prevent
accidents and damages.
•Contact the supplier for questions not answered in this manual.

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•Only use the FPS-900-RS for its designed purpose.
•Only qualified service-engineers may work on installation, maintenance and repairs.
•Unqualified people should not work on the equipment.
•Do not tamper or experiment with the equipment or exceed the technical specifications.

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3. Receiving, Unpacking, and Storage Instructions
3.1. Unpacking and Preparation
The N2-BLAST
® FPS-900-RS will arrive in a cardboard box. Open the box carefully, and identify and
verify all parts listed on the packing list are present and undamaged. South-Tek Systems (STS) is not
responsible for damages that occur during shipping and handling of the N2-BLAST
®
. Document any
visual damages and report them to the responsible shipping company, and then, contact STS at (888)
526-6284 to assess the damages.
Until Installation:
•Store the N2-BLAST
®
in a dry and climate controlled (40-100° F) room.
•Always keep N2-BLAST
®
in an upright position / or, preferably, in the box as shipped.
•Read entire manual and make all connections (per instructions) before connecting power.
•Keep all gas lines dry so moisture does not enter generator upon hookup.
•Never place/stack objects on top of the N2-BLAST
®
.
Remove the nitrogen generator from the cardboard box by carefully lifting the unit out and setting it
on a flat surface. Prepare the wall mounting bracket before moving it to the final location. Carefully,
break down the cardboard box and store in a safe location. Reuse the cardboard box if returning for
factory service.

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4. Site and Utility Requirements
4.1. Air Supply
The N2-BLAST
®
FPS-900-RS includes a built-in air compressor to supply gas to the nitrogen generator.
It is not for performing quick fills. Please install a separate suitable air compressor for other needs.
4.2. Additional Piping and Hosing
Sourcing and installing additional plumbing, supplied by other manufacturers, must meet all of the unit’s
flow, pressure, and temperature requirements. If piping length between any equipment is greater than
50 feet, consult with a piping contractor for proper line size.
4.3. Electrical Requirements
The N2-BLAST
®
FPS-900-RS requires 120VAC / 50-60hz / Single Phase (1Ф). A 240VAC option is also
available. It has a built-in 10Amp fuse and comes with hard wire to terminal blocks for customer
connection. It comes with UL 508A ICP certification and the electrical schematics are available upon
request.
4.4. Site Specifications
Unless designed otherwise, install in a nonhazardous indoor location with temperatures between 40-
100°F (4°- 38°C).

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5. Product Installation
5.1. INSTALLATION ARRANGEMENT
See below for basic setup. Refer to the General Arrangement drawing for detailed instructions included
with the installation package:
GA-FPS-00900-RELIABLE
Product Assembly Instructions:
All N2-BLAST
®
FPS-900-RS mounting holes and wall mounting bracket holes are for 1/4”
screws/anchors (not provided).
1. Review drawing set for general arrangement provided within the system enclosure.
2. Install sieve beds:
a) The sieve beds are part of the sub-assembly, FPS-00900-Reliable-03, but will be shipped
separately
b) Sieve beds will come pre-assembled with mounting brackets for placing into the Reliable ®
cabinet. Brackets are designed for Qty. Six 1/4”-20 bolts, not included. See General
Arrangement for location of holes.
c) They should be placed in the cabinet one sieve bed at a time. They are marked “bed A”
and “bed B.” Bed A should be on the left facing the cabinet.
d) The lower bracket is slotted so that the sieve bed may be set down on top of the fastener
for ease of installation.
e) Once the bed is set on the lower fastener, the top bracket should be secured in place using
both mounting holes in the bracket.
f) Once the upper brackets are secured firmly in place, secure the lower bracket with a nut,
wing nut, or similar fastener.
3. Assemble nitrogen output fittings on sieve beds:
a) The nitrogen output fittings are part of FPS-00900-Reliable-03 sieve bed assembly, but are
shipped loose as a sub-assembly.
b) Locate the sub-assembly to place on top of the sieve bed assembly.
c) The sub-assembly terminates in two metal stem push to connect fittings on each side.
d) The sub-assembly should be firmly placed into the top of the sieve bed which has female
push to connect fittings to receive the stems. The stems should “snap” into place and hold
securely.
e) Test that the fittings are secure before moving forward.
4. Install nitrogen storage tank:
a) The nitrogen storage tank, FPS-00900-Reliable-04, will come pre-assembled with all
necessary fittings.
b) The tank will need to be placed in the Reliable cabinet and secured in place with four (4)
fasteners, not included.

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c) Ensure that it is oriented so that the “Nitrogen” label and pressure gauge face the front of
the cabinet.
5. Install air compressor and bracket to back side of cabinet enclosure.
a) The air compressor assembly will be shipped and installed on the air compressor bracket.
b) The bracket needs to be bolted in place into the proper location at the back of the cabinet.
c) It is designed to use Qty. Four (4) 1/4”-20 bolts.
d) For mounting pattern see General Arrangement drawing supplied with system.
6. Install the N2-BLAST
®
electrical enclosure into the Reliable cabinet:
a) The electrical enclosure, FPS-00900-Reliable-01, will be shipped fully assembled.
b) The cabinet is designed for Qty. Four (4) 1/4”-20 hardware.
c) For the location and mounting pattern see the General Arrangement drawing.
d) Ensure that the PLC, gauge and switches all face the front of the cabinet.
7. Install bypass handle to the air maintenance device:
a) Bypass handle, part of FPS-00900-Reliable-04, will come pre-assembled.
b) It will need to be connected to the AMD by threading a nipple into both parts.
c) The threads are 1/2” NPTF. Ensure that they are taped sufficiently to seal.
8. Plumb all fittings as specified in product general arrangement drawing (Refer to applicable labels
and General Arrangement drawing for connections.)
a) Qty: 7 - 1/4” PTC OD tube fitting from valve cabinet
b) Qty: 5 –1/4” PTC OD tube fitting from sieve bed assembly
c) Qty: 1 –1/4” PTC OD tube fitting from compressor assembly
d) Qty: 2 –1/4” PTC OD tube fitting from nitrogen tank
e) Qty: 1 –1/2” PTC OD tube fitting from nitrogen tank
f) Qty: 1 –1/2” PTC OD tube fitting from air bypass valve
g) Qty: 1 –1/2” NPT male fitting to AMD (AMD provided by others)
h) Qty: 1 –1/2” NPT female fitting to air bypass compressor outlet
i) Qty: 1 –1/4” PTC OD tube fitting from bypass handle assembly to valve cabinet
9. Apply external electrical connections to the unit and bypass handle sensor via quick connector
plugs and wire leads, as shown on the General Arrangement drawing.
a) Connect and wire compressor electrical using supplied quick disconnect.
b) Connect and wire main power using supplied 16’ power cable with flying leads.
c) Connect and wire alarm connection customer contact, alarm process using. supplied 16’ of
wire.
d) Connect and wire magnetic switch to bypass handle assembly using supplied quick
disconnect.

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6. System Design
6.1. Key Features
The N2-BLAST
®
FPS-900-RS key features include the following:
•Air Compressor
•Safety Relief Valves
•Programmable Logic Controller (PLC)
•N2Tank
•Air Filters
•Pressure Swing Adsorption Beds
•Automatic Pressure Cut-in/Cut-out
•Patented BlastOff® Leak Detection System
6.1.1.Air Compressor
An oil-less internal air compressor has an engineered dampening system reducing vibration
and noise throughout the cabinet. The air compressor has a pre-filter to catch small
particulates that can cause damage. The recommended replacement for the pre-filter is 1000
run hours or 1-year, whichever comes first. Dirtier environments may need more frequent
changes. Consult with the supplier for a different filter maintenance schedule if installing in a
dirty environment.
6.1.2.Air Filters
The generator has an air inlet pre-filters and two filters between the compressed air and O2
separation beds - the particulate and coalescing. The 5-micron particulate filter catches the
bulk particles, and the 0.1 micron coalescing catches the remaining smaller particles. Both
filters feature an auto-drain that drains any water buildup within the filter housing. These
drain lines are on the cabinet’s bottom right side. Connect these drain lines to a safe location.
6.1.3.Programmable Logic Controller (PLC)
An integrated PLC on the cabinet features smart timing to maximize the generator’s
performance. It controls the valve timing and sequencing to move compressed gas
throughout the system. It also has a smart feature to automatically switch between different
“modes” based on the current run stages (see Chapter 7: System Operation for more about
the unit’s functionality).
6.1.4.Safety Relief Valves (SRVs)
The installed ASME safety relief valves add additional safety to protect component failures.
6.1.5.Nitrogen Tank

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The nitrogen tank comes with ball valves, safety relief, and a gauge. The outlet gas connects
to an external manual ball valve for easy plug and play connection.
6.1.6.Automatic Cut-In and Cut-Out
The generator starts and stops based on a pressure switch. Do not adjust the factory preset
cut-in and out pressure without first consulting with South-Tek Systems.
6.1.7.Patented BlastOff®–Leak Detection System
The BlastOff®Leak Detection System is a patented feature which sends an alarm if it detects
a possible gas leak. The alarm signal can be an audible, visual, and Fire Alarm Control
Panel. Power cycle the unit to reset the alarm, but avoid doing this multiple times, without
finding the cause, as it will shorten the generator’s life.
6.2. Specifications
N2-Blast FPS-900-RS
Nitrogen Purity
98.5+%
Installation
Internally Integrated (PrePak)
Display
Hours / Run / Standby Alarms
N2Storage Pressure
60-70 PSIG (+/-5%)
Cabinet Port Connections
½” NPT Female
Electrical
110-220V / 50-60 Hz / 1 Phase; 10 Amp Fuse
Compressor
Integral / Oil-Free
Ambient Temperature
40° to 100°F
Noise Level (dbA)
< 90 dbA
Size
5”W x 19”D x 12”H (Cabinet Dimensions)

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7. System Operation
7.1. General
The nitrogen generator uses valve sequencing to produce nitrogen. The design meets
specifications of a fire protection system. Consult with South-Tek System for written approval
before performing any field changes or customization. Unauthorized changes void all warranties
and may cause damages or malfunctions to the system.
This section describes the major control functions and instrumentations associated with the
nitrogen generators. All programs are proprietary and password protected from the factory. Do not
alter any controls or instrumentations. Changes without South-Tek Systems’ written consent voids
the performance specifications.
Figure 1: Controller Display
Note: Install the nitrogen generator per “Section 5: Product Installation” and perform the startup
procedures in “Section 8: Startup Procedures” before performing normal operations.

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7.2. Controller Modes
This mode allows access to several features:
•Filter Change Reset - When a new FRP (Filter Replacement Kit) is installed, the 1000-hour filter
change time must be reset. After replacing the filter elements, press and hold the Filter Change
Reset Button (Down Button) for 7 seconds. An audible beep will confirm that the time is reset and
filter alarm will be reset.
•Blastoff®Simulation - Hold the (Set Button) for 7 seconds Passcode Screen will pop up,
1. Press the (Set Button) one time to activate data entry, Enter (6557) using the (Up and Down
Buttons)
2. Press the (ENT Button) to confirm the entry.
It will bring (HOLD SET) Screen, to simulate the Blastoff, press and hold the Set Button for 5
seconds this will simulate the Blastoff and trip the alarm dry contact in the unit (if installed) for 2
seconds so that proper functioning can be confirmed.
•Next Button - to navigate between the screens as filer hours, program version, unit ambient
temperature, and the sensors screens if it’s applicable (check appendix A).
7.3. NORMAL RUNNING / STANDBY MODE (RUNNING -STANDBY)
“Running” mode is when the FPS-900-RS is producing nitrogen and suppling it to the storage
tank. The system will automatically enter “Standby” mode when the tank is fully pressurized (70
PSIG +/-5 PSIG). It will remain in “Standby” mode until the tank pressure falls 7-10 PSIG.
To run the system in normal run mode:
1. Connect the correct power supply to the system.
2. Open the nitrogen generator’s 3-way outlet ball valve (lower left side of the cabinet) to nitrogen
out position.
3. On the nitrogen tank, open the gas inlet and outlet ball valve.
4. Push the On/Off toggle button on the upper left control panel to the “On” position (up) and the
system will automatically turn on and start filling nitrogen to the storage tank.

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7.4. Stopping the System
To stop the system:
1. Close off the gas outlet valve on the nitrogen storage tank.
2. System will automatically stop once it reaches the cut-out pressure of approximately 65-75
PSIG.
3. In the case of an emergency shut off, push the On/Off toggle button on the upper left control
panel to the “Off” position. The unit will shut down immediately.
7.5. Alarm Mode
when an alarm mode is activated, it will trigger the audible buzzer, alarm contact, and flash the
cause of the alarm on the screen. The customer alarm contact wiring can be viewed on the
supplied wiring diagram. The customer alarm dry contact is constantly energized and will
constantly illuminate the LED indicator on top of the contact. This is so when there is no power, or
power is lost on the system, the contact will de-energize and show a fault condition. The alarm
contact has a max rating of 6A at 250VAC and 2A at 24VDC.
Figure 2: FPS-900-RS Alarm Contact Diagram
7.5.1.Bypass Mode (Air n2 bypass)
during the 30-minute fire protection system fill test or when a potential issue with the
generator is detected, the operator can switch the system into manual bypass mode by
turning the handle on the 3-way ball valve to the bypass position. With the handle in the
“Bypass Mode”, the bypass alarm triggers the audible buzzer, alarm contact, and flashes
“Air n2 bypass” on the controller’s 7-segment display. The alarm will turn off once the
handle is back to normal run position.
7.5.2.BlastOff®Alarm Mode (BLAsstoff 9H.run)
The nitrogen generator activates a BlastOff®Alarm when it detects potential leaks or nitrogen
being overdrawn. The BlastOff®Alarm will trigger the audible buzzer, alarm contact, and
flash “BLAsstoff 9H.Run” on the controller’s 7-segment display. Inspect and test the system

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for leaks and component failures. Power cycle the unit to reset the alarm but avoid doing this
without finding the cause, as it will shorten the generator’s life. Contact South-Tek Systems,
or the local installer, for further troubleshooting.
7.5.3.Low System Pressure Alarm Mode
The Low System Pressure alarm activates when a system pressure is detected below the
normal functioning limits of the nitrogen generator. This may be from an issue with the
generator, a supply valve being shut off, or caused by a large leak in the fire protection
system, The Low Pressure Alarm will trigger the audible buzzer, alarm contact, and flash “N2
PRESS ALAR.” on the controller’s 7-segment display.
7.5.4.Power Loss Alarm Mode (-----)
The Power Loss Alarm activates when the nitrogen generator loses power for any reason.
This will cause the alarm contact to trigger.
7.5.5.Filter Replacement Alarm Mode
Once the nitrogen generator has been running for 1,000 hours or more, the filter replacement
alarm will activate the audible buzzer, alarm contact, and flash “FILTER CHANGE” on the
controller’s 7-segment display. Replace the filters according to Section 9 Maintenance. After
replacing the filter elements, press and hold the Filter Change Reset button (Down Button)
for 7 seconds. Screen will show “FILTER RESET” and audible beep will confirm that the time is
reset, and the filter alarm will shut off if it is active. (Note: resetting this will also trigger the
Customer Alarm Relay for one second).
7.5.6.Communication
(1) (Modbus RTU)
Modbus (RTU) is optional feature our generator offers to our customer to monitor the unit
from BMS (Building Management System).
MODBUS communication can be set up to retrieve real time data. The nitrogen generator
MODBUS Communication settings are as follows:
-Protocol: RTU
-Slave ID: 1
-PLC Controller: Slave
-Bud rate: 119200
-Data Bits: 8
-Parity: none
-Stop Bits: 2

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See MODBUS addressing table below:
Function
Data Type
Modbus RTU
Address
Units/Status
Read/
Write
Running / Standby
BOOL
00012
0=Standby, 1=Running
R
Common Alarm
BOOL
00004
1=Good, 0=Alarm
R
BlastOff Alarm
BOOL
00015
0=Good, 1=Alarm
R
Bypass Alarm
BOOL
10005
1=Good, 0=Alarm
R
N2 Low Tank Pressure Alarm
BOOL
10004
1=Good, 0=Alarm
R
Filter Alarm
BOOL
00029
0=Good, 1=Alarm
R
Filter Reset Confirm
BOOL
00031
0=Good, 1=Alarm
R
Filter Hours
Register
40019
xxxxx.x / hours
R
(2) Analog output (4-20 OUT)
Another useful and optional feature of (FPS) Reliable System units an analog signal
output (4-20 mA) for current readings of different data points as follow:
(i) Ambient temperature “4-20 out dEgr.F”
(ii) Oxygen content (percent) “4-20 out p.CEnt”
(iii) Oxygen content (ppm) “4-20 out trACE”
(iv) Supply Pressure “4-20 out prEss”
To setup the analog out:
1) Hold the (Set Button)for 5 seconds Passcode Screen will pop up
2) Press the (Set Button) one time to activate data entry, Enter (6557) using the (Up
and Down buttons)
3) Press the (ENT Button) to confirm the entry.
It will bring (Hold Set) Screen, press (NEXT) button to get to the analog output screen “4-20 out”,
Using the (up and down buttons) buttons to change type of sensor, to confirm press (Set button).
To exits menu press (Next button) to get back to main screen “running or standby”.
Note: For analog output standard units (without advanced options) only will offer ambient
temperature signal, check appendix A.

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8. Start-up Procedures
8.1. Start-up Procedures
Use caution when working with pressurized gas, and install all fittings and gas lines correctly.
Always leak check (see 8.2 Checking for Leaks section) every line before using the system.
Note: Line leaks will cause the N2-Blast
®
FPS-900-RS to run excessively, shortening its life and possibly
causing excessive wear on the compressor.
The system documentation package comes with an installation layout drawing. For electronic copies,
please contact your local distributor. Review the complete installation layout drawing before installing
and operating the system. Ensure that you follow the correct installation drawing per your system’s
design. In some cases, a nitrogen bypass system for pre-filling is required to meet code. If the system
requirements are more complex, please consult the sales representative or equipment installer for
more detailed instructions.
Note: The N2-Blast
®
comes with 1/2” NPT Female inlet and outlet fittings. Use Teflon tape or similar on
all fittings to prevent leakage. When connecting an external air compressor, complete the startup
procedures per manufacturer before starting the nitrogen generator.
The following are standard startup instructions:
1. Complete the installation procedures from Reliable Unit Installation Instructions. (See section 5)
2. Check that the power connection is correct.
3. Turn the 3-way ball valve on the system output to the “Bypass” position.
Figure 3: 3-way valve in bypass position
4. Open the inlet ball valve on the nitrogen storage tank if it is closed.
5. Push the power button on the top left of the cabinet to the “On” position (up). The air compressor
will power on if the storage tank is under pressurized. If neither the compressor nor PLC display
power on, check the wiring and supply power to the generator.
6. Once the system is running, the pressure gauge will increase to 65-70 PSIG within 30 minutes or
less. While it is running, check the system for leaks to ensure proper functionality.

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a) Once it reaches 65-70 PSIG, the system will enter “Standby” mode and automatically shut
off the internal air compressor. Check the controller on the control panel for the
“STANDBY” display.
b) Once in standby, note the pressure reading on the tank pressure gauge. Monitor the
pressure for the next 5 minutes for any loss in pressure. If there is a pressure drop, check
for leaks around connection fittings, otherwise proceed to the next step.
7. Switch the 3-way ball valve on the system output to the “Nitrogen Out” position and the system
will fill with nitrogen.
Figure 4: 3-way valve in N2out position
8. Completely fill the storage tank and then allow the nitrogen generator to go into standby mode
again.
9. Once in standby mode, monitor the tank pressure gauge for 5 minutes to ensure that no significant
leaks are in the sprinkler system.
8.2. Checking for Leaks
The BlastOff®provides early warning alarms for potential leakage. With a suspected leak, first
listen for leaks and then spray soapy water around the connections. When a leak occurs, isolate
the area and relieve pressure before working on it. Fix the leaking part and return the system back
to operation. If no leak is heard (or no bubbles are seen), turn off the unit and try isolating sections
to see if there’s a pressure loss. Consult with your installer if you cannot find the leakage area.
8.2.1.To determine if the leak is between the Generator and the Nitrogen Tank:
1. With the unit powered on, close off both ball valves on the nitrogen tank. Note the storage tank
pressure.
2. Allow the system to continue running. Within 10 minutes or less, the system should reach the
“Standby” mode.
3. Wait 5 minutes and if the system remains in “standby” mode, then the leak is after the nitrogen
generator. Read the nitrogen tank pressure and if the pressure has changed, the leak is within

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the storage tank fittings. If the nitrogen tank pressure did not change, check the sprinkler
piping in the building for leaks.
4. Returning to “run” mode indicates the leak is within the cabinet. Check lines back to the tank.