Little Giant 5-MD-SC Manual De Instrucciones

Little Giant Pump Company
P . O. Box 12010
Oklahoma City, OK 73157-2010
405.947.2511 • Fax: 405.947.8720
www.LittleGiant.com
customerservice@lgpc.com
G INTRODUCTION
This instruction sheet will provide you with information required to
safely own and operate a Little Giant 5-MD Series pump.
The instruction sheet primarily covers the standard models of each
pump series. The form is applicable to other models in the series
not listed by catalog number in the replacement parts list section
of the instruction sheet. If the catalog number of your pump is not
listed in the replacement parts list section, then caution should be
exercised when ordering replacement parts. Always give the cata-
log number of your pump when ordering replacement parts.
The Little Giant unit you have purchased is of the highest quality
workmanship and material. It has been engineered to give you
long and trouble-free service. The Little Giant pumps are carefully
packaged, inspected and tested to insured safe operation and
delivery. When you receive your pump, examine it carefully to
determine that there are no broken or damaged parts that may
have occurred during shipment. If damage has occurred, make
notation and notify the firm that you purchased the pump from.
They will assist you in replacement or repair, if required.
READ INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING
TO INSTALL, OPERATE OR SERVICE THE LITTLE GIANT
PUMP . KNOW THE PUMP APPLICATION, LIMITATIONS, AND
POTENTIAL HAZARDS. PROTECT YOURSELF AND OTHERS
BY OBSERVING ALL SAFETY INFORMATION. FAILURE TO
COMPLY WITH INSTRUCTIONS COULD RESULT IN PERSON-
AL INJURY AND/OR PROPERTY DAMAGE! RETAIN INSTRUC-
TIONS FOR FUTURE REFERENCE.
SAFETY GUIDELINES
1. Make certain that the unit is disconnected from the power
source before attempting to service or remove any compo-
nent.
2. Do not use to pump flammable or explosive fluids such as
gasoline, fuel oil, kerosene, etc. Do not use in explosive
atmospheres. Pump should only be used with liquids compat-
ible with pump component materials.
3. Do not handle pump with wet hands or when standing on a
wet or damp surface or in water.
4. This pump is supplied with a grounding conductor and/or
grounding type attachment plug. To reduce the risk of electric
shock. be certain that it is connected to a properly grounded
grounding type receptacle.
5. In any installation where property damage and/or personal
injury might result from an inoperative or leaking pump due to
power outages, discharge line blockage, or any other reason,
a backup system(s) and/or alarm should be used.
6. Support pump and piping when assembling and when
installed. Failure to do so may cause piping to break, pump to
fall, motor failures, etc.
5-MD-SC
5-MD-HC
TE-5-MD-SC
TE-5-MD-HC
ELECTRICAL CONNECTIONS
1. Check the pump label for proper voltage required. Do not
connect to voltage other than that shown.
2. If pump is supplied with a 3-prong electrical plug, the third
prong is to ground the pump to prevent possible electrical
shock hazard. DO NOT REMOVE the third prong from the
plug. A separate branch circuit is recommended. Do not use
an extension cord. Do not cut plug from the cord. If the plug
is cut or the cord is shortened, then this action will void the
warranty.
3. The National Electric Code requires that a ground fault circuit
interrupter (GFCI) be used in the branch circuit supplying
fountain pumps and other pond equipment. See your electrical
supplies dealer for this device.
4. To reduce the risk of electric shock, use only on portable self-
contained fountains no larger than five feet in any dimension.
CONSULT INSTRUCTION SHEET ILLUSTRATIONS FOR PROPER
ASSEMBLY AND DISASSEMBLY OF YOUR LITTLE GIANT PUMP .
PUMP CONSTRUCTION
The patented Little Giant magnetic drive pump design consists of
a cylindrical drive magnet attached to the motor shaft which
rotates around a chemical resistant plastic separator housing.
Inside this housing is a magnet completely encapsulated in
chemical resistant plastic, and fixed to the impeller. The impeller
assembly is free to rotate on a spindle that is supported at both
ends. The spindle is held captive and does not turn. Front and rear
thrust washers are utilized as wear bearings. The washers are held
captive and do not revolve. This prevents wear on the shaft.
With the magnetic coupling the motor drives the impeller. This
coupling eliminates the conventional shaft seal and its possibility
of leakage.
Two series are available. The HC series handles highly corrosive
chemicals at elevated temperatures because of the unique
materials used in its construction. The SC series handles semi-
corrosive fluids. Both series are available with various size pumps,
and are available in 115V or 230V, 50/60 Hz versions.
The HC models utilize a carbon bushing between the impeller and
spindle. The use of this carbon bushing will allow these pumps
(HC series) to run dry (without fluid) for up to eight hours at a time.
Do not allow the SC models to run dry. They do not have the
carbon bushing and heat build up caused by friction will damage
the parts when SC models are run dry.
PUMP MATERIALS
The plastic parts on SC series pumps are made of glass-filled
polypropylene. The plastic parts on the HC series pumps are
glass filled Ryton . The spindle shaft which is stationary and the
®
captive thrust washers (front and rear) are alumina ceramic. The
O-ring seal is Buna-N for the SC series, and Viton
®
series. The HC series utilizes a pure carbon bushing in the
impeller to enable the pump to run dry for periods up to eight
hours at a time.
INSTALLATION
Your Little Giant pump is delivered to you completely preassembled
and pretested from the factory. It is ready for immediate use. The
pump may be installed in any position. It may be mounted
vertically with the pump head down. Proper plumbing connections
should be made. See specification table to determine what size
intake and discharge your pump has. Use a thread sealer on all
pipe connections and hand tighten only. NOTE: On HC models a
roll of Teflon
pipe seal tape is supplied. Do not use a wrench to
®
for the HC
®
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