Owner`s manual
GENERAL INFORMATION
2
INSTALLATION
Your pump is designed for use only with thin viscosity petroleum
fuels such as gasoline (up to 15% alcohol blends such as
E15), diesel fuel (up to 20% biodiesel blends such as B20) and
kerosene. Do not use this pump for dispensing any fluids other
than those for which it was designed. Using the pump with
other fuels can damage components and void the warranty.
Model Components
M-3120-ML / M-3220-ML: Includes pump, hose, manual nozzle
and components to assemble to unit before use.
M-3120-AL / M-3220-AL: Includes pump, hose, automatic
nozzle and components to assemble to unit before use.
M-3120-PO / M-3220-PO: Includes pump only and compo-
nents to assemble to unit before use.
M-3120-RDP: Includes dedicated pump only for remote dis-
pensing systems.
NOTE: Suffixes ML, AL and PO are for ordering purposes only.
Constructions described above are covered as alternate
constructions under the Part No. M-3120 and M-3220
UL Listing.
How to Use This Manual
The purpose of this manual is to assist you in installing, oper-
ating and maintaining your GPI pump. If you need additional
assistance, contact your GPI dealer or the GPI Customer
Service Department.
The following safety alert symbols are used
in this manual. Obey all safety messages
that follow this symbol to avoid possible
injury or death.
DANGER indicates an
imminently hazardous
situation which, if not
avoided, will result in
death or serious injury.
WARNING indicates a
potentially hazardous
situation which, if not
avoided, could result in
death or serious injury.
CAUTI ON indicates a
potentially hazardous
situation which, if not
avoided, may result in
minor or moderate injury.
CAUTION used without
the safety alert symbol
indicates a potentially
hazardous situation which,
if not avoided, may result
in property damage.
There are inherent dangers wherever flammable fuel and AC
electrical sources are in close proximity.
Static electricity as a source of sparking is always a concern
and requires extreme care in the installation and operation of
your entire fuel transfer system.
Additional components such as meters, automatic nozzles
and filters must be listed for use with fuel transfer systems.
The flow of fuel through a hose and nozzle can generate static
electrical charges and dangerous sparking can result in fire or
explosion. Hoses and nozzles must be electrically conductive
and bonded to ground.
It is your responsibility to:
• Know and follow applicable national, state and local safety
codes pertaining to installing and operating electrical
equipment for use with flammable liquids.
• Know and follow all safety precautions when handling
petroleum fuels.
• Ensure that all equipment operators have access to
adequate instructions concerning safe operating and
maintenance procedures.
Coverplates protect the operator from moving parts. Never
operate the pump without coverplates in place. Never apply
electric power to the pump without coverplates in place.
Always disconnect power before repairing or servicing.
DANGER
WARNING
CAUTION
WARNING
CAUTION
Mechanical Connections
All threaded fuel connections must be sealed with thread tape
or a pipe thread sealing compound approved for use with
petroleum fuels and tightened securely to prevent leakage.
For 3/4 inch applications, Part No. 111018-1 Bushing is used.
See Item 42 in parts drawing for reference.
Your pump must be mounted on a vented tank. If the tank is not
vented, contact your GPI distributor for the correct vent cap.
This pump has a built-in check valve to keep the pump primed.
No additional check valve is required on suction pipes shorter
than 15 feet (4.6 meters). Make sure any check valves or foot
valves used are equipped with proper pressure relief valves.
Your pump is designed to mount directly to a standard 2-inch
female tank fitting. For the suction pipe, a 1-inch galvanized
steel pipe cut to length and threaded on one end may be used.
Suction pipe should extend to within 3 inches of tank bottom.
Apply thread tape to the suction pipe thread and securely
tighten the suction pipe to the pump inlet port.