Axi STS 7030 User manual

Optimal Fuel Quality •Reliable Power
Product Submittal
Package
STS 7030
Automated Fuel Filtration System
• Modbus, TCP/IP, LAN and Internet Connectivity
• E-mail & SMS Maintenance Alerts
• Maintenance Alert Log File
• Multiple-tank Functionality
• Runtime Totalizer
• On-screen Help
• Alarm History

Optimal Fuel Quality •Reliable Power
Product Submittal
Package
Section 1
CSI Specifications

Filename: CSI STS-7030-New1.docx 9/4/13 Page 1 of 3 Pages
CSI - GUIDE
SPECIFICATION
Possible Sections:
Section 26 32 00 Packaged Generator Assemblies
Section 23 11 13 Facility Fuel Oil Piping
Section 23 13 00 Facility Fuel-Storage Tanks
Section 23 10 00 Facility Fuel Systems
Other sections applicable
Automated Fuel Filtration System
Model: STS 7030
FUEL QUALITY MAINTENANCE SYSTEM
A. Manufacturers: Subject to compliance with requirements, provide product by the following:
1. AXI International
B. Description: Stand-alone, factory complete, automated, programmable, Green Clean Institute Certified,
fuel filtration, optimization and maintenance system shall be provided for each diesel fuel storage tank to
optimize and maintain the condition of fuel stored in that tank. The system shall be capable of eliminating
microbial contamination and removing water, sediment and particulate to comply with ASTM D975
(Standard Specification for diesel Fuel Oils).
1. Enclosure: All system components shall be contained within a powder coated or stainless
steel, weatherproof, outdoor NEMA / UL 50 Type 4 listed enclosure with appropriate ventilation.
Hinged front doors shall be equipped with quarter-turn key lockable handle. Fluid containment
area with leak detection shall be an integral component of the enclosure. Literature pocket
inside enclosure and external enclosure brackets for wall or rack mounting to be included.
2. Plumbing: System shall be furnished with shutoff ball valves on the fuel inlet and fuel outlet for
easy filter / water separator maintenance. A see-through flow indicator shall be installed to
monitor fuel flow and flow rate, both visually and also via the PLC controller. Above mentioned
components shall be located within the enclosure. Internal plumbing will be primarily executed
in stainless steel.
3. Installation: System shall provide male pipe connections protruding from the enclosure for
customer plumbing connection. System shall be located as close as possible to designated fuel
tank. The system’s fuel supply and discharge lines shall be independent and separate from
other fuel lines, with the supply line originating at the lowest point at the bottom of the tank and
the discharge line as far away as possible from the supply line.
4. Filtration / water separation: Four stage filtration / water separation process:
a. Stage 1: Nexus “Y” strainer – 304 Stainless Steel 20 mesh

Filename: CSI STS-7030-New1.docx 9/4/13 Page 2 of 3 Pages
b. Stage 2: LG-X 4000 Fuel Conditioner – to reduce the size and mass of fuel sediments
which naturally form in fuel, and to eliminate microbial contamination thus eliminating the
need for toxic biocides
c. Stage 3: Primary Filtration 10 micron Fine Filter as standard, with water sight-glass and
water drain valve – Cartridges shall be available in 1, 5, 10, and 25 micron ratings
d. Stage 4: Secondary Filtration 10 micron Coalescing Filter as standard, with water sensor
probe and water drain valve – Cartridges shall be available in 1, 5, 10, and 25 micron
ratings in each of three cartridge types: Fine Filter, dissolved and emulsified water
absorbing “WB water block”, and Coalescing
e. Primary and secondary filters shall be equipped with a liquid-filled pressure gauge and
differential pressure indicator
5. Water Sensor: Watect model 550 microcontroller-based water sensor alarm module to
eliminate probe corrosion.
6. Controls / Display functions: System control features, indicator lights and emergency
stop button shall be located on a descriptive external control panel on the front door of the
enclosure for easy operator access. Additional alarm and system status information shall be
displayed inside the system on a full color programmable touch-screen PLC controller,
displayed on a dedicated webpage that monitors the system as well as delivered through E-
mail and SMS messages to designated individuals. System shall provide following control
and display function:
a. Full Modbus TCP/IP and LAN connectivity
b. Programmable Digital Timer – Memory backup to retain program memory during
power outages
c. Pump operating hour counter
d. Pump control switch (Auto-Off-Manual), weatherproof, key operated, front access
e. Alarm Reset - weatherproof push button, external access
f. Power available indicator, green indicator, external display
g. Pump running indicator, amber indicator, external display
h. High vacuum, high pressure, no flow, high water alarm and leak detection, red
indicator, external display
i. Emergency stop push button, red, latching - turn reset, external access
7. Electrical enclosure / Controller: All electrical control features shall be contained within a
separate UL 508A listed industrial control panel located within the mechanical enclosure.
The controller shall monitor the following system alarm points:
a. Leak in enclosure detection (system shutdown)
b. Primary filter high vacuum sensor (system shutdown)
c. Primary filter high water sensor (system shutdown)
d. Secondary filter high pressure sensor (system shutdown)
e. Flow switch (system shutdown after priming delay)
f. External system shut down input
g. Motor Overload (system shutdown)
8. Pump: Positive displacement, internal gear, direct coupled, rotary pump with cast iron housing
and built-in pressure relief bypass valve. Pump flow rate of 30 gallons per minute.

Filename: CSI STS-7030-New1.docx 9/4/13 Page 3 of 3 Pages
9. Motor: UL Listed, TEFC, Thermal overload protection, continuous duty
C. Performance / Design Criteria: System shall be capable of filtering the entire tank volume with a
required filtration run-time of ideally 24 hours, but no more than 48 hours. Sufficient sediment as well as
water-holding capacity should be ensured. System run-time requirements will vary with climate, tank-
layout, fuel delivery, refueling intervals, etc. and shall be adjusted in accordance with the input from
pressure and vacuum gauges as well as water sensor.
D. Operation: System shall provide dry contacts for summary alarm and leak detection alarm to interface
with building monitoring or building alarm system. An external shut down feature shall be provided to
interrupt pump operation from a remote location such as a BMS. Additionally, the System may be
remotely controlled by deactivating the PLC Controller timer.
DISCLAIMER STATEMENT
This guide specification is intended for use by a qualified construction Specifier. It is meant to be used in
conjunction with the procedures of each design firm, and the particular requirements of a specific
construction project.

Optimal Fuel Quality •Reliable Power
Product Submittal
Package
Section 2
Installation, Operation & Maintenance Manual

Optimal Fuel Quality •Reliable Power
Installation, Operating
and Maintenance Manual
STS 7030
Automated Fuel Filtration System
• Modbus, TCP/IP, LAN and Internet Connectivity
• E-mail & SMS Maintenance Alerts
• Maintenance Alert Log File
• Multiple-tank Functionality
• Runtime Totalizer
• On-screen Help
• Alarm History

2

3
INSTALLATION, OPERATING AND MAINTENANCE MANUAL
TABLE OF CONTENTS
GENERAL SPECIFICATIONS ..................................................................................................................................................8!
STS 7030 ..................................................................................................................................................................................................................................................................8!
SYSTEM COMPONENTS.........................................................................................................................................................8!
Y-Strainer.................................................................................................................................................................................................................................................................8!
Pump / Motor: .....................................................................................................................................................................................................................................................8!
Fuel Conditioner.................................................................................................................................................................................................................................................9!
Primary Filter.........................................................................................................................................................................................................................................................9!
Secondary Filter/ Water Separator..........................................................................................................................................................................................................9!
Weatherproof double door wall-mounted enclosure with lockable handles / latches........................................................................................9!
Stainless steel plumbing ...............................................................................................................................................................................................................................9!
PRIMARY INSPECTION ...........................................................................................................................................................9!
Checklist: .................................................................................................................................................................................................................................................................9!
INSTALLATION.......................................................................................................................................................................... 9!
Mounting.............................................................................................................................................................................................................................................................10!
Electrical................................................................................................................................................................................................................................................................10!
Plumbing .............................................................................................................................................................................................................................................................11!
Typical plumbing / Above ground tank installation (schematically).............................................................................................................................12!
IMPORTANT INSTALLATION PRECAUTIONS ................................................................................................................12!
PRIMING THE SYSTEM..........................................................................................................................................................13!
Priming procedure:........................................................................................................................................................................................................................................13!
TOUCH-SCREEN CONTROLLER - ALARM FEATURES .................................................................................................14!
INITIAL START-UP / COMMISSIONING CHECKLIST ....................................................................................................15!
Flow switch setting / adjustment (“No Flow Alarm”)...............................................................................................................................................................15!
Gauge venting / accuracy.........................................................................................................................................................................................................................15!
Initial test procedure.....................................................................................................................................................................................................................................15!
OPERATION .............................................................................................................................................................................17!
Emergency Stop..............................................................................................................................................................................................................................................17!
Pump Operation..............................................................................................................................................................................................................................................17!
SETTING THE CURRENT TIME AND DATE .........................................................................................................................................................................................17!
PROGRAMMING THE TIMER .....................................................................................................................................................................................................................18!
Fuel Line Leak....................................................................................................................................................................................................................................................18!
Stabilizing and Optimizing Fuel Quality...........................................................................................................................................................................................18!
MAINTENANCE.......................................................................................................................................................................19!
Preventative Maintenance........................................................................................................................................................................................................................19!
Servicing Y-Strainer........................................................................................................................................................................................................................................21!
Servicing primary filter.................................................................................................................................................................................................................................21!
Servicing water separator..........................................................................................................................................................................................................................22!
Servicing secondary filter...........................................................................................................................................................................................................................22!
Changing the secondary filters..............................................................................................................................................................................................................22!
TROUBLESHOOTING ............................................................................................................................................................23!
AUTOMATIC FUEL FILTRATION SYSTEMS WARRANTY ............................................................................................25!
LIMITED WARRANTY ............................................................................................................................................................25!
TECHNICAL ASSISTANCE AND ORDERING ...................................................................................................................26!
Replacement filter elements ...................................................................................................................................................................................................................26!
STS 7030 SYSTEM IDENTIFICATION ................................................................................................................................26!
APPENDIX A - ABBREVIATIONS USED IN THIS MANUAL..........................................................................................27!
APPENDIX B – DRAWINGS..................................................................................................................................................28!

4

1-239-690-9589
1-877-425-4239 Toll Free
www.AXI-International.com
Global Fuel Quality Ingenuity
STS 7030 (8/13)
STS 7030
Programmable Automated Fuel Filtration System
STS 7030 Programmable Automated Fuel Filtration Systems are self-contained, stand-alone systems that remove
and prevent the buildup of water, sludge and contaminants in tanks. They stabilize diesel and bio-fuels, eliminate microbial contami-
nation to optimize and maintain fuel quality. STS systems guarantee Optimal Fuel Quality for Reliable Power at All Times.
STS 7030 SPECIFICATIONS
Flow Rate 30 GPM
Primary Filter/Water
Separator/Coalescer
1, 5, 10 or 30 µ Particulate
or Coalescing
Secondary Filter/
Water Block
1, 5, 10 or 25 µ Particulate
or Water Block
Fuel Conditioner LG-X 4000
Smart Filtration
Controller
HMI PLC Controller with Touch-Screen
and remote monitoring, Modbus, TCP/IP
LAN and Internet connectivity
Pump Internal Gear Pump
Power 208-230V 60Hz 20A or
230V 50Hz 15A
Plumbing Stainless Steel
Ports In 2” NPT Out 1.5” NPT
Weatherproof Cabinet NEMA 12, 13, 4 Powder Coat
or Stainless
Dimensions 56” x 72” x 17”
(142 x 183 x 43 cm)
Weight ≈688 lbs
Not for use with uids that have a ash point below 100°F.
All STS Systems feature:
• Multi-stage water removal and particulate ltration
• NEMA 12, 13, 4 Powder Coated or Stainless
• UL508A Smart Filtration Controller
• Continuous-Duty Pump, Viton Seals
• Stainless Steel Plumbing
• Stand-Alone, Reliable & Turn-Key
For safe operation, the STS 7000 Series’Touch-Screen
Controller triggers automatic alarms and shuts down the
pump when lters need service; a leak is detected; high
separator water level, high lter vacuum, or high pump
pressure occurs; or when the fuel ow is out of range.
Implementing STS Fuel Quality Optimization & Main-
tenance Systems guarantee Optimal Fuel Quality for
Reliable Power At All Times. STS 7000 Series prevents
downtime, periodic tank cleaning, replacing out-of-spec
fuel and fuel-quality related injection system repairs.
The STS 7000 Series is equipped with a UL508A Touch-
Screen Controller with Modbus, TCP/IP, LAN and Internet
connectivity for more intuitive system setup and monitor-
ing from remote locations.
STS 7000 Series includes:
• Modbus, TCP/IP, LAN and
Internet connectivity
• E-mail & SMS Maintenance Alerts
• Maintenance Alert Log File
• Multiple tank Functionality
• Runtime Totalizer
• Alarm History
• On-screen Help

1-239-690-9589
1-877-425-4239 Toll Free
www.AXI-International.com
Global Fuel Quality Ingenuity
Preventive Maintenance Plans for mission-critical power are
essential. However, most service agreements do not cover
fuel-related engine failures. Fuel has a limited shelf-life and
even “fresh fuel” could contain water, sediment, microbes and
bio-fuel components upon delivery.
Periodic generator tests-runs are too short to determine if fuel
quality is adequate for the demands of continuous, full-load
operation. In fact, generator test runs signicantly accelerate
the fuel polymerization and degradation process by returning
fuel that has been compromised by heat and pressure back to
the tank.
Potential liabilities can easily be avoided by implementing
an AXI Fuel Quality Maintenance Program as part of every
disaster recovery plan. An STS 7000 automatically maintains
fuel quality and guarantees reliable emergency power
whenever it is needed.
The system is automatically operated by the programmable
UL508A Touch-Screen Controller with Modbus, TCP/IP, LAN
and Internet connectivity. All components and control devices
are contained within a fully enclosed, lockable, weatherproof,
NEMA-rated cabinet.
The principal components are a continuous-duty motor with
coupled gear pump, a strainer/primary coalescing lter with
vacuum sensor and gauge, an ALGAE-X Fuel Conditioner and a
secondary water block ne lter with pressure gauge and sensor.
The SEPAR primary lter protects the pump, coalesces
and removes water and particulate. The patented ALGAE-X
Fuel Conditioner prevents and reverses fuel degradation,
agglomerization and microbial contamination. The secondary
lter is a quick-change spin-on lter designed to remove
dissolved and emulsied water and contaminants down to 1 µ.
Inside the STS 7030
1. Fuel Inlet (From Tank)
2. Inlet Ball Valve
3. Nexus Y Strainer
4. Vacuum Gauge
5. Vacuum Switch
6. ALGAE-X® Touch-Screen Controller
7. Motor
8. Gear Pump
9. Pressure Relief Valve
10. Pressure Gauge
11. ALGAE-X® Magnetic Fuel Conditioner
12. Leak Deterctor
13. Pressure Transmitter
14. Primary Filter
15. Secondary Filter/Water Separator Coalescer
16. Water Sensor Alarm Module
17. Mechanical Flow Meter with Flow Switch
18. Outlet Ball Valve
19. Fuel Outlet
20. Storage Shelf
STS 7030 Accessories:
• Multiple tank functions
• AFC-705 Fuel Catalyst
• Digital Flow Meter
• Foot Valve
• Wide range of lter elements
1
19
From Tank
(Suction)
To Tank
(Discharge)
54 6 10
12
11 20
17 18
151614139872 3

1) Fuel Inlet (From Tank)
11) AXI®Magnetic Fuel Conditioner
2) Inlet Ball Valve
12) Leak Detector (Float Switch) in Spill Tray
3) Nexus Y Strainer
13) Pressure Transmitter
4) Vacuum Gauge
14) Primary Filter
5) Vacuum Switch
15) Secondary Filter/Water Separator Coalescer
6) AXI INTERNATIONAL Touch-Screen Controller
16) Water Sensor Alarm Module
7) Motor
17) Mechanical Flow Meter with Flow Switch
8) Gear Pump
18) Outlet Ball Valve
9) Pressure Relief Valve
19) Fuel Outlet
10) Pressure Gauge
20) Storage Shelf
Preventive Maintenance Plans for mission-critical power are
essential. However, most service agreements do not cover
fuel-related engine failures. Fuel has a limited shelf-life and
even “fresh fuel”could contain water, sediment, microbes and
bio-fuel components upon delivery.
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quality is adequate for the demands of continuous, full-load
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the fuel polymerization and degradation process by returning
fuel that has been compromised by heat and pressure back to
the tank.
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an AXI Fuel Quality Maintenance Program as part of every
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fuel quality and guarantees reliable emergency power
whenever it is needed.
The system is automatically operated by the programmable
6-"Touch-Screen Controller with Modbus, TCP/IP, LAN
and Internet connectivity."MMDPNQPOFOUTBOEDPOUSPMEFWJDFT
are contained within a fully enclosed, lockable, weatherproof,
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The principal components are a continuous-duty motor with
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The SEPAR primary lter protects the pump, coalesces
and removes water and particulate. The patented ALGAE-X
Fuel Conditioner prevents and reverses fuel degradation,
agglomerization and microbial contamination. The secondary
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Inside the STS 7030
1. Fuel Inlet (From Tank)
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19. Fuel Outlet
20. Storage Shelf
STS 7030 Accessories:
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[phone]
1-877-425-4239 Toll Free
www.AXIFuelConditioning.com
!"#!$%&'()*+,)-*./)-0
Wherever fuel is being used or stored
1
19
From Tank
(Suction)
To Tank
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54 6 10
12
11 20
17 18
151614139872 3

8
GENERAL SPECIFICATIONS
STS 7030
Flow Rate ............................................................................... 30 gpm / 1800 gph
14,400 Gallons per 8 hour shift
43,200 Gallons per 24 hours
Outline Dimensions (Enclosure) .............................57” x 72” x 14” (H x W x D)
System Weight ...................................................................approx. 510 lbs
Operating Temperature ............................................... 41 to 104° F; 5 to 40° C
Electrical ................................................................................. 208-230 V / 60 Hz / single phase (standard)
......................................................................................................230 V / 50 Hz also available
Pump .......................................................................................Gear Pump
Suction capability (primed) 15 ft vertical or 100 ft. horizontal lift (lines >1”, primed)
Motor .......................................................................................2 hp single phase, continuous duty
Timer ........................................................................................Programmable Digital Timer
Inlet ...........................................................................................2” NPT male port
Outlet ....................................................................................... 1-1/2” NPT male port
Max. Fluid Viscosity ..........................................................5 cSt
Note: The STS 7030 is designed to meet environmental standards for safe operation.
(NOT for use with fluids that have a flash point below 100°F (38°C), e.g.: gasoline, alcohol, …)
SYSTEM COMPONENTS
CONTROL AND SAFETY DEVICES
•AXI International “Touch-Screen Controller” in electrical sub enclosure – UL 508A listed Industrial
Control Panel
•Programmable Digital Timer –Memory backup to retain program memory during power outages
•Pump control switch (Auto-Off-Manual), weatherproof, key operated
•Alarm Reset - weatherproof push button
•Power available indicator
•Pump running indicator
•External remote shut-down feature
•Inlet and outlet shut off ball valves
•Emergency stop button
•Pressure relieve valve
•Leak sensor and alarm indicator (system shutdown)
Y-STRAINER
•Nexus Y-Strainer with drain valve
PUMP / MOTOR:
•Positive displacement gear pump
Relief valve
•Motor – UL listed
TEFC (Totally enclosed fan cooled)

9
FUEL CONDITIONER
•Inline Algae-X Fuel Conditioner eliminates and prevents microbial contamination and the
formation of sediments that naturally occur in diesel fuel.
PRIMARY FILTER
•RACOR FBO 14 fuel filter
•Drain valve on the bottom
•Pressure gauge (stainless steel, liquid filled)
•10-micron filter cartridge (other filter elements available)
•Differential Pressure indicator
SECONDARY FILTER/ WATER SEPARATOR
•RACOR FBO 14 fuel filter / coalescer
•Drain valve on the bottom
•10-micron filter cartridge (other filter elements available)
•Pressure gauge (stainless steel, liquid filled)
•Differential Pressure indicator
WEATHERPROOF DOUBLE DOOR WALL-MOUNTED ENCLOSURE WITH LOCKABLE HANDLES /
LATCHES
•14-gauge steel construction with continuously welded seams
•Concealed hinges
•Finished in polyester powder coat inside and out over phosphatized surfaces
•Spill tray with leak detection
•Louvered side panels
•Brackets for wall mounting
•Literature pocket
STAINLESS STEEL PLUMBING
PRIMARY INSPECTION
Upon arrival, the STS 7030 Automatic Fuel Filtration System and accessories must be visually inspected
before installation. Improper handling during shipping may cause physical or electrical problems.
Immediately report or note any damages (also concealed ones) to the shipper.
CHECKLIST:
oIf the packing crate shows signs of damage inspect the STS 7030 cabinet for damage. Check the
entire outside of the cabinet for damage that could indicate internal mechanical or electrical
problems.
oCheck locking handles, door and hinge operation.
oCheck pump/motor hardware and all plumbing connections for tightness.
oCheck all electrical terminals and connections for tightness.
INSTALLATION
! IMPORTANT ! It is recommended that only qualified, experienced personnel, familiar
with this type of equipment, who have read and understood all the instructions in this

10
manual should install, operate and maintain the system.
MOUNTING
The STS 7030 is a totally enclosed system and should be permanently wall mounted on a hard, level
surface. Use provided mounting feet for proper fastening. This weatherproof unit is designed for well-
ventilated indoor or outdoor use within specified temperature range and should be located as close to
the tank as possible.
Please allow about 1 ft of space between the side louvers of the enclosure and nearby objects. This space
is necessary to ensure sufficient ventilation of cooling air for the system and motor.
ELECTRICAL
! WARNING ! To avoid the risk of electric shock make sure that the power supply to the
system is disconnected and ensure that the system is at zero volts, before working on
any of the system’s electrical parts.
Make sure that the systems power requirements and rated voltage / frequency match your electrical
system (See wiring diagram). The STS 7030 may only be connected to properly grounded power sources
for operator safety. Connect all components to the ground studs provided as shown on the electrical
drawings.
! WARNING ! The whole system (Enclosure, doors, plumbing, motor, electric sub panel)
must be properly grounded for operator safety.
Depending on length of run, use copper wiring according to specification in wiring diagram and connect
system to a separate UL listed breaker (not included) appropriate for branch circuit protection.
Note: Wiring and electrical installation must be in accordance with all applicable Federal,
State and Local rules, laws, standards and regulations.
Remote Pump Shut-Down Feature:
If required, connect the “external pump shut down input terminal” (see wiring diagram) and follow
the specifications provided in the electrical wiring diagram to disable pump (e.g.: remote shut down,
remote pump control, …). Please note that the contact needs to be supplied with +24V DC from the
power supply of the STS 7030 AXI International Smart Filtration Controller.
Remote Monitoring - Dry Contacts:
The STS provides two NO (normally open) dry contacts for remote alarm monitoring. Please see wiring
diagram for contact rating, connection and location.
1) “Summary Alarm” – dry alarm contact for high vacuum, high pressure, no flow or water detection
(as well as Emergency stop and overload relay triggered)
2) “Leak Detection” – dry alarm contact for leak detection

11
PLUMBING
Use proper quality approved fuel line materials with at least 2” inner diameter on the suction side
from the tank and at least 1-1/2” inner diameter on the return / discharge side back to the tank.
Note: Do not put any stress on plumbing of STS 7030 and use a backing wrench when
connecting the external plumbing. Whenever possible a FLEXIBLE CONNECTION
SHOULD BE USED TO REDUCE STRESS on the plumbing and prevent damage from
thermal expansion.
The pick-up tube/line(s) should originate from the lowest point of the tank (to remove all water),
should be connected directly to the system’s “PUMP INLET – SUPPLY FROM TANK” port located on the left
hand side of the enclosure and kept as short as possible. It is recommended to install an oversized,
low restriction foot valve to keep the system primed, especially if the “PUMP INLET – SUPPLY FROM
TANK” port of the system is located above the lowest possible fuel level in the tank. A priming tee
should be installed on the highest point of the suction line to be able to easily prime the lines and
system.
The return line(s) should be plumbed to the “PUMP OUTLET – RETURN TO TANK” port (on the right side
of the system) and enter the tank as far as possible from the pick up tube close to the tank bottom. A
(swing) check valve may be required on the return line(s) on some installations to prevent back flow
pressure.
Multiple suction and/or return lines may be connected to a manifold outside the STS 7030 (see options
list).
Anti-Siphon or other external plumbing devices may be required – please check local regulations / code.
The system capabilities are 15 ft suction (vertical) or 100 ft horizontal lift, when connected to (suction)
piping of 2” ID or more with no additional flow restrictions such as valves, 90-degree connectors or other
plumbing accessories. For continuous optimal performance, make sure suction and discharge lines are
free and that nothing is blocking the flow of fuel and that the suction line always stays primed.

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Note: Plumbing and Installation must be in accordance with all applicable Federal, State and
Local rules, laws, standards and regulations.
TYPICAL PLUMBING / ABOVE GROUND TANK INSTALLATION (SCHEMATICALLY)
IMPORTANT INSTALLATION PRECAUTIONS
The suction line of the system should be independent and separate from the suction line of the
engine. If that is not possible, appropriate valves must be installed to completely separate the STS 7030
from the engine fuel system to prevent any possible interference with safe engine operation.
It is highly recommended to plumb the discharge line independent and separate of the engine’s fuel
return line back to the tank. If the return line from the engine and the discharge of the STS 7030 have to
be combined in any way, adequate valves should be installed to prevent any possible interference with
safe engine operation.
Note: If any of the STS 7030 system’s fuel lines are used in combination with the engine’s fuel
system, the STS 7030 should be disabled during engine operation (use the provided
“remote pump shut down” feature as shown in the electrical drawing and described
above).