GORMAN-RUPP S Series Owner's manual

PUBLICATION NUMBER OM--04796
November 21, 1997
THE GORMAN-RUPP COMPANY DMANSFIELD, OHIO
GORMAN-RUPP OF CANADA LIMITED DST. THOMAS, ONTARIO, CANADA Printed in U.S.A.
eCopyright by the Gorman-Rupp Company
S SERIES
SUBMERSIBLE PUMPS

OM--04796 S SERIES PUMPS
PAGE I -- 1
INTRODUCTION
INTRODUCTION
Thank You for purchasing a Gorman-Rupp S Se-
ries Pump. Read this manual carefully to learn
how to safely install and operate your pump. Fail-
ure to do so could result in personal injury or dam-
age to the pump.
A set of three manuals accompanies your pump.
Each set consists of three parts; the Installation/
Operation Manual contains essential information
oninstallingandoperating the pump, and on mak-
ing electrical connections. However, since pump
installations are seldom identical, some of the in-
formation only summarizes general recommenda-
tions and practices required to inspect, position,
and arrange the pump and piping.
The Parts List Manual provides performance
curve(s), a pump model cross-section drawing,
andpartslistforyourpump.
The Maintenance and Repair Manual provides
troubleshooting and maintenance instructions re-
quiredtoproperlydiagnose operationalproblems,
and to service the pump hydraulic components.
Pump motor maintenance may be performedonly
by a Gorman-Rupp authorized repairfacility, or the
factory. Otherwise, the pump warranty will be ne-
gated, and damage to the pump, and injury or
death to personnel can result. Contact the factory
for the authorized repair facility closest to you.
Pump construction is cast iron with stainless steel
hardware and fittings. Some models are equipped
with built-in liquid level sensing devices which au-
tomatically regulate pump operation. The pump is
light weight and portable making it ideally suited to
many domestic and industrial applications where
low capacity dewatering or irrigation is required.
The pump is powered by anintegral thermally pro-
tected electric motor which is not explosion proof.
The pump may be operated fully or partially sub-
merged. The pump should not be operated in a
hazardous atmosphere.
Because pump installations are seldom identical,
this manual cannot possibly provide detailed in-
structions and precautions for every aspect of
each specific application. Therefore, it is the re-
sponsibility of the owner/installer of the pump to
ensure that applications not addressed in this
manual are performed only after establishing that
neitheroperatorsafetynorpumpintegrityarecom-
promised by the installation. Pumps and related
equipment must be installed and operated ac-
cording to all national, local and industry stan-
dards.
If there are any questions regarding the pump
which are not covered in this manual or in other lit-
erature accompanying the unit, please contact
your Gorman-Rupp distributor or the Gorman-
Rupp Company:
The Gorman-Rupp Company
P.O. Box 1217
Mansfield, Ohio 44901--1217
or:
Gorman-Rupp of Canada Limited
70 Burwell Road
St. Thomas, Ontario N5P 3R7
CONTENTS
SAFETY -- SECTION A
INSTALLATION -- SECTION B
GENERAL INFORMATION PAGE B --- 1.....................................................
PREINSTALLATION INSPECTION PAGE B --- 1...............................................
LUBRICATION PAGE B --- 2................................................................
MOTOR SPECIFICATIONS PAGE B --- 2.....................................................
PUMP INSTALLATION PAGE B --- 3.........................................................
ELECTRICAL CONNECTIONS PAGE B --- 5..................................................
WIRING DIAGRAMS PAGE B --- 9..........................................................
OPERATION -- SECTION C
GENERAL INFORMATION PAGE C --- 1.....................................................
PUMP OPERATION PAGE C --- 2...........................................................
STARTING, STOPPING, AND OPERATIONAL CHECKS PAGE C --- 3............................
COLD WEATHER PRESERVATION PAGE C --- 4..............................................
LUBRICATION PAGE C --- 4................................................................

OM--04796
SSERIESPUMPS
PAGE I -- 2 INTRODUCTION
RECORDING MODEL AND
SERIAL NUMBERS
Pleaserecordthepumpmodel,serialnumber,volt-
age, and motor frame size in the spaces provided
below. Your Gorman-Rupp distributor needs this
information when you require parts or service.
Pump Model:
Serial Number:
Voltage:
Phase:
WARRANTY INFORMATION
The warranty provided with your pump is part of
Gorman-Rupp’s support program for customers
who operate and maintain their equipment as de-
scribed in this and the other accompanying litera-
ture. Please note that should the equipment be
abused or modified to change its performance be-
yond the original factory specifications, the war-
ranty will become void and any claim will be de-
nied.
The following are used to alert personnel to procedures which require special attention, to those which
could damage equipment, and to those which could be dangerous to personnel:
Immediate hazards which WILL resultin
severe personal injury or death. These
instructions describe the procedure re-
quired and the injury which will result
from failure to follow the procedure.
Hazards or unsafe practices which
COULD result in severe personal injury
or death. These instructions describe
the procedure required and the injury
which could result from failure to follow
the procedure.
HazardsorunsafepracticeswhichCOULD
resultinminorpersonalinjuryorproductor
property damage. These instructions de-
scribe the requirements and the possible
damage which could result from failure to
follow the procedure.
NOTE
Instructions to aid in installation, operation, and
maintenance or which clarify a procedure.

OM--04796 S SERIES PUMPS
PAGE A -- 1
SAFETY
SAFETY --- SECTION A
This information applies to the S Series
submersible motor driven pumps.
Because pump installations are seldom
identical, this manual cannot possibly
provide detailed instructions and pre-
cautions for each specific application.
Therefore, it is the owner/installer’s re-
sponsibility to ensure that applications
not addressed in this manual are per-
formed only after establishing that nei-
ther operator safety nor pump integrity
are compromised by the installation.
Beforeattemptingtoopenorservicethe
pump:
1. Familiarize yourself with this man-
ual.
2. Lock out incoming power to the
control box to ensure that the
pump will remain inoperative.
3. Allow the pump to completely cool
if overheated.
5. Close the discharge valve (if
used).
This pump is not designed to pump vol-
atile,explosive,orflammablematerials.
Do not attempt to pump any liquids for
which you pump is not approved, or
which may damage the pump or endan-
ger personnel as a result of pump fail-
ure. Consult the factory for specific ap-
plication data.
Make certainthatthepumppowercable
is fitted with the proper type of
grounded plug (see Section B), andthat
the plug receptacle is grounded. If the
power cable is wired into an optional
manual starting switch or control box,
make sure that the enclosure is
grounded. See Section B for recom-
mended grounds.
The electrical power used to operate
this pump is high enough to cause inju-
ry or death. Make certain that the pump
power cable plug is disconnected from
thepowersupplybeforeperformingany
service or maintenance on the pump. If
thepowercableiswiredintoanoptional
manual starting switch or control box,
make sure that these devices are OFF
and the power LOCKED OUT. Be sure
that the incoming power matches the
voltage andphase of thepump andcon-
trol before connecting the power
source. Do not run the pump if the volt-
age is not within the limits.
The electrical power used to operate
this pump is high enough to cause inju-
ry or death. Obtain the services of a
qualified electrician to make all electri-
cal connections.
Never attempt to alter the length or re-
pair any power cable with a splice. The
pump motor and cable must be com-
pletely waterproof. Injury or death may
result from alterations.

S SERIES PUMPS OM--04796
PAGE A-- 2 SAFETY
Allelectricalconnections mustbe inac-
cordance with The National Electric
Code and all local codes. If there is a
conflict between the instructions pro-
vided and N.E.C. Specifications, N.E.C.
Specifications shall take precedence.
All electrical equipment supplied with
this pump was in conformance with
N.E.C. requirements in effect on the
date of manufacture. Failure to follow
applicable specifications, or substitu-
tion of electrical parts not supplied or
approved by the manufacturer, can re-
sult in severe injury or death and void
warranty.
Afterthepumphasbeeninstalled,make
certain that the pump and all piping or
hoseconnections aresecure beforeop-
eration.
Obtain the services of a qualified elec-
trician to troubleshoot, test and/or ser-
vice the electrical components of this
pump.
Donotattempttoliftthepumpbythe
motorpowercableordischargehose.
Attach proper lifting equipment to the
lifting device fitted to the pump.
Pumps and related equipment must be
installed and operated according to all na-
tional, local and industry standards.

OM--04796 S SERIES PUMPS
PAGE B -- 1
INSTALLATION
INSTALLATION --- SECTION B
GENERAL INFORMATION
Review all SAFETY information in Section A.
Since pump installations are seldom identical, this
section is intended only to summarize generalrec-
ommendations and practices required to inspect,
position,andarrangethepumpandpiping.Ifthere
are any questions concerning your specific instal-
lation, contact your Gorman-Rupp distributor or
the Gorman-Rupp Company.
Nuts, bolts and screws used on this pump
are metric and do not matchstandardSAE
measurement threads. If any threaded
hardware is replaced, it must be replaced
with metric type. Attempting to force in a
fastener with SAE threads will damage the
mating threads. An optional discharge
adaptor is available to convert the metric
pipe threads in the discharge flange to the
SAE threads.
Pump Model Designation
Following is a description of the model numbering
system for S Series pumps. These submersible
pumpsareavailableinasmallrangeofsizes.Refer
to the following chart to identify the size for your
specific pump model.
S
Series
Discharge Size
Pump Hydraulics
Pump Construction
Phase
2 C 3 115V 1P
Pump Model
Voltage
A
Autostart (If Equipped)
PREINSTALLATION INSPECTION
The pump assemblywas inspectedand testedbe-
fore shipment from the factory. Before installation,
check for damage which may have occurred dur-
ing shipment. Check as follows:
a. Inspectthepumpassemblyforcracks,dents,
damaged threads, and other obvious dam-
age.
b. Check for and tighten loose attaching hard-
ware. Since gaskets tend to shrink after dry-
ing, check for and tighten loose hardware at
the mating surfaces.
c. Inspect the power cable for cuts or any other
obvious damage.
d. Check that amperes, phase, voltage and
hertz indicated on the name plate match the
ratings on the control box and incoming pow-
er.
e. Carefully read all tags, decals, and markings
onthepump,andperformalldutiesindicated.
f. Check for oil leaks. If there is any indication of
an oil leak, see LUBRICATION at the end of
this manual.
g. If the pump has been stored for more than 12
months, some of the components or lubri-
cants may have exceeded their maximum
shelf life. These must be inspected or re-
placed to ensure maximum pump service.
Ifthemaximumshelflifehasbeenexceed,orif
anything appears to be abnormal, contact
your Gorman-Rupp distributor or the factory
to determine the repair or updating policy. Do
not put the pump into service until appropri-
ate action has been taken.
PUMP SEAL
These S Series pumps utilize one of the following
sealing methods.
1. S1 1/2A and S2C Models --- The pump is
equipped with one double-faced sealassem-
bly. It is designed to prevent the liquid being
pumpedfromenteringthelubricationcavityat
the impeller end, and to prevent moisture or
lubrication oil from entering the motor hous-
ing cavity at the motor end.
2. S2D Models --- The pump is equipped with a
single faced seal assembly. It is designed to
prevent the liquid being pumped from enter-
ingthelubrication cavityat theimpeller end.A

SSERIESPUMPS OM--04796
PAGE B -- 2 INSTALLATION
lip seal is used to prevent moisture or lubrica-
tion oilfrom entering the motor housing cavity
at the motor end.
Regardless of which sealing method is used, the
seal is lubricated by premium quality submersible
pump oil.
LUBRICATION
The pump utilizes one lubrication cavity, located
between the pump casing and the motor housing.
It is filled with premium quality submersible pump
oilwhichlubricatesthepumpseal.Themotoroper-
ates in and is cooled by air, therefore it requires no
lubrication.
All S Series pumps are fully lubricated when
shipped from the factory. However, lubrication lev-
els must be checked before installing the pump
(see LUBRICATION in the MAINTENANCE AND
REPAIR MANUAL). If the oil level is abnormally
low, determine the cause before putting the pump
into service.
Refer to Table B-2 for oil capacities and positions
for filling the seal cavity in each pump. Refer toLU-
BRICATION, Section C for lubrication specifica-
tions and intervals.
PUMP INSTALLATION
Pump Motor Specifications
See Table B-1 for pump specifications.
TableB-1.PumpSpecifications
Liquid
Level
Control
Locked
Rotor
Amperes
Pump
HP/
KW
Motor
Speed
(RPM)
Full
Load
Amperes
No
Load
Amperes
Discharge
Size
(NPT)
Model Voltage/
Phase
S1 1/2A 115/1 NO 1/3 HP 3420 5.4 4.0 29.5 11/2INCH w/BARBED
ADAPTOR
S2C 115/1 NO 6.8 4.3 22.71/2 HP 3470 2INCH
w/BARBED
ADAPTOR
S2D 115/1 NO 8.6 1.0 50.61 HP 3450 2INCH
w/BARBED
ADAPTOR
S2DA 115/1 YES 8.6 1.0 50.61 HP 3450 2INCH
w/BARBED
ADAPTOR

OM--04796 S SERIES PUMPS
PAGE B -- 3
INSTALLATION
Table B-2. Additional Specifications
Pump
Model Voltage/ Phase
S2C 115/1
115/1S2D
Approximate
Weight -- Lbs. (kg) Oil Capacity
Ounces (Liters) Seal Cavity Filling
Position
(H)orizontal
Pump 50 Ft. Cable Seal
Cavity Motor
Cavity
115/1S1 1/2A 7 (0,2)50 (23) 6 (3) H
6(3)52 (24) 7 (0,2) H
78 (42) 6 (3) 7 (0,2) H
--- --- ---
--- --- ---
--- --- ---
Pump Dimensions
For the approximate physical dimensions of your
pump, refer to the pump specification data sheet
or contact your Gorman-Rupp distributor or the
Gorman-Rupp Company.
PUMP INSTALLATION
When installing or servicing the pump
or controls, follow all requirements for
the installation of wiring or electrical
equipment as outlined in the National
Electric Code. Follow all safety require-
ments.Failuretoobservetheserequire-
ments could result in injury or death to
personnel. NOTE
Refer to the performance curve in the Parts List
Manual when determining the most efficient piping
installation. The recommended maximum sub-
mergence depth is 23 feet. Greater depths
could result in damage to the pump
Lifting
Use lifting equipment with a capacity of at least
five times the weight of the pump, including the
weight of the cable, if applicable, and any options
orcustomer-installedaccessories.Dischargehose
orpipingmustberemovedbeforeattemptingtolift
the pump.
Refer to Table B---2 for the approximate maximum
weight for each pump.
Donotattempttoliftthepumpbythe
motor power cable or the piping. Attach
proper lifting equipment or a rope to the
lifting device fitted to the pump.
Positioning the Pump
The pump is designed to operate fully or partially
submerged. The rotating parts are oil lubricated,
and the motor is cooled by a constant flow of liquid
or air discharged through internal passages.
The pump will operate if positioned on its side, but
this is not recommended because the motor
torque could cause the pump to roll during opera-
tion.
The pump should be independently secured and
supported by the lifting device fitted on the pump.
Iftheapplicationinvolvesalotofdebris,protectthe
pump from excessive wear and clogging by sus-
pending it in a perforated barrel or culvert pipe. If
the bottom is heavily sludge-covered, rest the
pump on support blocks or suspend it from a raft
or similar device near the surface of the liquid. See
Figure B---1 for typical pump installations.

SSERIESPUMPS OM--04796
PAGE B -- 4 INSTALLATION
All liquid entering the pump must pass through a
strainer screen. Any spherical solids which pass
through the screen will pass through the pump.
BY BAIL IN PERFORATED CULVERT PIPE ON SUPPORTS
Figure B--1. Typical Pump Installations
Piping
Nosuction piping isrequired ina standard installa-
tion.
S Series pumps are provided with a suction strain-
er to prevent large solids from clogging the impel-
ler.
To determine the size ofthe dischargeconnection,
see Table B--1, Pump Specifications.Either
hose or rigid pipe may be used. To facilitate mobil-
ity and maintenance, it is recommended that the
discharge line be fitted with a quick disconnect fit-
ting near the pump. The discharge line must be in-
dependently supported to avoid strain and vibra-
tion on the pump.
Either hose or rigid pipe may be used to make dis-
charge connections. For maximum pumping ca-
pacity, keep the line as short and straight as pos-
sible. Elbows and fittings used in discharge lines
increase friction loss, minimize their use.
It is recommended that a check valve or throttling
valve be installedin thedischarge lineto controlsi-
phoning or back flow when the pump is shut off.
ELECTRICAL CONNECTIONS
Install and operate this pump in accor-
dance with the National Electrical Code
and all local codes. Have a qualified
electrician perform all checks and con-
nections in this section.
Never attempt to alter the length of the
pump motor cable or to repair it with a
splice. The power cable and pump mo-
tormustbekept completelywaterproof.
Serious damage to the pump and injury
or death to personnel can result from
any alteration to the cable.

OM--04796 S SERIES PUMPS
PAGE B -- 5
INSTALLATION
Field Wiring Connections (Incoming Power)
The pump is designed to operate with a 115 volt,
1 phase, 60 hertz power supply. The voltage avail-
able at the motor must be within the indicated in
Table B --- 3.
To calculate the voltageavailable at the motor, pro-
ceed as follows:
a. Measurethevoltagewhile the pump is oper-
ating atfull capacity. See wiring diagrams at
the end of this section.
b. Next, subtract the motor cable voltage drop
(see Table B-5, Pump Power Cable Specifi-
cations).
c. Do not continue to operate the pump if this
voltage is not withinthe recommendedlimits.
Obtain theservicesofa qualified electricianto
determinethecorrectfieldwiringsizeandoth-
er details toensure an adequate voltagesup-
ply to the pump.
TableB-3.PumpVoltageRequirements
NOMINAL
VOLTAGE PHASE MINIMUM
VOLTAGE MAXIMUM
VOLTAGE
1115 110 120
Grounding Methods
If the pump is fitted with an electrical plug, ground
thereceptaclebeforeinsertingtheplug.Ifthepow-
er cable will be wired into an optional manual
switch or controlbox, ground the enclosurebefore
installingthewiring.Inanyofthesecases,theelec-
trical circuit must be grounded to a properly im-
bedded electrode.
Thematerialusedfortheelectrodemust be anex-
cellent conductor of electricity, such as copper. If
ironorsteelisused, it must be galvanized orother-
wise metal plated to resist corrosion. Do not coat
the electrode with any material of poor conductiv-
ity, such as paint or plastic.
The electrode must conform to the recommenda-
tions of N.E.C. ARTICLE 250. Follow allinstallation
requirementsoftheN.E.C.,andallapplicablelocal
codes. See Figure B---3 for some suggested
grounding methods.
ROCK
8
FEET
(2,4
M)
3/4 INCH (19,1
MM) NOMINAL
DIAMETER
(MINIMUM)
3/4 INCH (19,1 MM)
NOMINAL DIAMETER
(MINIMUM) 8 FEET
(2,4 M) LONG
SOIL
SOIL
SOIL
1/4 INCH (6,4 MM)
STEEL PLATE 2 SQ.
FEET (1858,1 SQ. CM)
SURFACE AREA
(MINIMUM)
a) PLATE ELECTRODE b) DRIVEN ELECTRODE c) BURIED ELECTRODE
Figure B--3. Suggested Grounding Methods
a. Plate Electrode: An iron or steel plate, 1/4
inch (6,4 mm) thick, completely impeded in
the ground. The plate must present asurface
area of at least 2square feet (1858,1 sq. cm.).
b. Driven Electrode: A rod or pipe, 3/4 inch
(19,1mm)indiameterminimum,8feet(2,4m)
long, completely driven into the ground.

SSERIESPUMPS OM--04796
PAGE B -- 6 INSTALLATION
c. Buried electrode: If rock or stone prevents
embedding the full 8 foot (2,4 m) length of the
ground rod, bury it horizontally in a trench.
Space the ground rod or plates at least 6 feet
(1,8) from any other electrode or ground rod,
such as those used for signal circuits, radio
grounds, lightning rods, etc.
Theearthsurroundingthegroundrodorplate
must contain enough moisture to make a
good electrical connection. In dry or sandy
areas, pour water around the rod, or consult
qualified personnel to devise a method of im-
proving the connections.
The electrical power used to operate
this pump is high enough to cause inju-
ry ordeath. Make certain that the recep-
tacle or optional enclosure is properly
grounded after installation.
Pump Power Cable Connections
The electrical power used to operate
this pump is high enough to cause inju-
ry or death. Obtain the services of a
qualified electrician to make all electri-
cal connections. Make certain that the
pump and receptacle or optional enclo-
sure are properly grounded.
The pump is provided with a 50 ft. (15,2 m) power
cable (see Table B---5 for standard power cable
specifications) with one end wired into the pump
head. The other end terminates in a grounded
power plug (autostart models) or separate leads
whichmustbeconnectedtoacontrolboxorswitch
box (non-autostart models).
If connected to a grounded electrical plug (auto-
start models), power to the receptacle must be di-
rected through a fused circuit, and the receptacle
must be controlled by a positive ON/OFF switch.
Optional rainproof starting switches are available
from the factory (see the Parts List manual).
NOTE
The optional rainproof starting switch listed in the
PartsListisnot designedtobewatertightandmust
not be used in submerged applications.
The use of extension cords is not recommended.
If extension cords are used, they must have three-
wiresinglephaseconstructionand have adequate
carrying capacity for their length.
Splicing of the power cable is not recommended
by the Gorman-Rupp Company due to safety and
warranty considerations. If a longer power cable is
required, it should be continuous length and
should replace the existing cable. Any replace-
ment cable must be to Gorman-Rupp standards,
and must be approved by Gorman-Rupp.
Never attempt to alter the length or re-
pair any power cable with a splice. The
pump motor and cable must be com-
pletely waterproof. Injury or death may
result from alternations.

OM--04796 S SERIES PUMPS
PAGE B -- 7
INSTALLATION
Table B-5. Pump Power Cable Specifications
Pump
Model Voltage/ Phase
115/1
A.W.G
Cable
Size
Conductor
Dia.
Inches
(mm)
DC
Resistance
(ohms) at
225_
__
_C(77_
__
_F)
per 1000 ft.
(305 m)
Cable
O.D.
Inches
(mm)
Amp
Rating
(See
Note
Below) Cable
Type
115/1
S1 1/2A 16 0.43 (11) 0.06 (1,5)
Voltage
Drop
per 100 ft.
(30,5m) at
Max. Load
13* SO 4.49 5.12
16 13* SO 7.72
S2C
S2D
115/1 16 0.43 (11) 0.06 (1,5) 13* 4.49 6.29
0.43 (11) 0.06 (1,5) 4.49
SO
* Applies only to SO type cable. Refer to manufacturer’s specifications for other cable.
When necessary to change or connect the pump
power cable to a control box, make certain the in-
coming power is OFF and LOCKED OUT,Make
certainthecontrolboxisPROPERLYGROUNDED
and that the electricaldata on the controlmatches
the motor name plate data.
Connect the pump power cable to the control
switch as shown in the wiring diagrams at the end
of this section. Make certain that all connections
are tight and that cable entry points are rainproof.
Control Box
Any control box used to operate the
pump must be approved by the Gor-
man-RuppCompanyfortheapplication.
Motor Cable Grounding Test
Do not connect the pump control cable
incoming voltage before verifying the
pump ground;otherwise, personnelwill
be exposed to serious injury or death.
Liquid Level Devices
Thepumpmaybefurnishedwithbuilt-indevicesto
automatically regulate liquid level by filling and de-
watering.
If the pump is not furnished with a means to auto-
matically regulate liquid level, it may be controlled
to perform filling and dewatering by using the float
switch and liquid level control offered as options
(see Figure B --- 5).
Overheatingwilloccuriftheliquidlevelfalls
below the level required to cool the pump
motor (see LIQUID LEVEL in Operation,
Section C).

SSERIESPUMPS OM--04796
PAGE B -- 8 INSTALLATION
PUMP
CONTROL BOX
LIQUID LEVEL
RANGE
ON (FILLING)
TO LEVEL CONTROL CIRCUIT
IN MAIN CONTROL BOX
OFF
DEWATERING
PUMP
CONTROL BOX
TO LEVEL CONTROL CIRCUIT
IN MAIN CONTROL BOX
LIQUID LEVEL
RANGE
OFF
DEWATERING
ON (FILLING)
Figure B--5. Typical Float Switch Installation

OM--04796 S SERIES PUMPS
PAGE B -- 9
INSTALLATION
WIRING DIAGRAMS
S1---1/2A3A 115V 1P
S1 1/2A3 115V 1P

SSERIESPUMPS OM--04796
PAGE B -- 10 INSTALLATION
WIRING DIAGRAMS
S2C3---115V 1P
S2C3A 115V 1P

OM--04796 S SERIES PUMPS
PAGE B -- 11
INSTALLATION
WIRING DIAGRAMS
S2D3 115V 1P
S2D3A 115V 1P

OM--04796 S SERIES PUMPS
PAGE C -- 1
OPERATION
OPERATION --- SECTION C
GENERAL INFORMATION
Review all SAFETY information in Section A.
This pump is designed to handle most
non-volatile, non-flammable liquids. Do
not attempt to pump any liquids for
which your pump is not approved, or
which may damage the pump or endan-
ger personnel as a result of pump fail-
ure. Consult the factory for specific ap-
plication data.
The pump motor and optional accesso-
ries are not designed to be explosion-
proof. Do not operate in an explosive at-
mosphere.
Follow the instructions on all tags, labels and de-
cals attached to the pump.
Pump Performance
Since operation of the pump motor is de-
pendentuponthequalityandperformance
oftheelectricalcontrols,thepumpwarran-
ty is valid only when controls have been
specified or provided by The Gorman-
Rupp Company.
Refer to the pump Specification Data Sheet or the
accompanying Parts List Manual for the specific
performance for your pump.
Pump Controls
The pump is driven by an integral 115 VAC, 60
hertz, 1 phase motor equipped with thermal motor
overheat protection.
Ifthepumppowercableispluggedintoanelectri-
cal receptacle, (auto-start models, see Power
Cable Connections,SectionB),thepumpwill
start andstopautomaticallyas theliquid levelrises
and falls.
If wired to an optionalmanual starting switch(non-
auto-start models), the toggle switch within the
rainproof enclosure will start and stop the pump.
If the pump power cable is wired into an optional
automatic liquid level controlbox, pump operation
is controlled by a selector switch. In the OFF posi-
tion theswitch preventsalloperationsof thepump.
In the MAN position,it allowsthe pump to runcon-
tinuously. In the AUTO position, it allows thepump
to be controlled automatically by an optional liquid
level device installed in the sump or wet well (see
Liquid Level Devices in Section B).
Short circuit protection for the electrical receptacle
and/or optional control box is provided by a cus-
tomer-furnished fuse or breaker within the circuit.
If the breaker trips repeatedly, operational prob-
lems exists. See TROUBLESHOOTING in the
Maintenance And Repair Manual.
The pump motor and control box are not
designed to be explosion-proof. Do not
operateinanexplosiveatmosphere.Im-
proper location of a non-explosion
proof control box could result in de-
struction of equipment, injury or death
to personnel.
See the operating instructions furnished with the
control box, and with other optional accessories
and controls, before attempting tostart the pump.

SSERIESPUMPS OM--04796
PAGE C -- 2 OPERATION
PUMP OPERATION
Liquid Temperature and Overheating.
Overheated pumps can cause severe
burns and injury. If the pump becomes
overheated:
1. Stop the pump immediately.
2. Unplug the power cable or switch
offthepoweratthecontrolboxand
lock it out to ensure that the pump
will remain inoperative.
3. Allow the pump to completely cool
if overheated.
4. Close the discharge valve (if
used).
5. Refertoinstructionsinthismanual
before restarting the pump.
Do not start the pump more than 6 times
per hour. If the motor does not cool be-
tween starts it will overheat, resulting in
damage to the motor windings.
The maximum liquid temperature for this pump is
120_F (490_C).Donotapplyitatahigheroperat-
ing temperature.
Overheating can occurif thepump ismade tostart
and stop repeatedly without time to cool off be-
tween starts, the liquid level is allowed to fall too
low to sufficiently cool the motor, or if the circuit
breaker or fuse fails to provide adequate protec-
tion. Operating the pump against a closed dis-
chargevalveforanextendedperiodwillalsocause
the pump to overheat.
Approach the pump cautiously after it
hasbeenrunning.Althoughthemotoris
cooledby theliquidbeing pumped,nor-
maloperating temperaturescanbehigh
enough to cause burns. The tempera-
ture will be especially high if operated
againsta closeddischarge valve.Never
operate against a closed discharge
valve for long periods of time.
If overheating does occur, stop the pump immedi-
ately and allow it to cool before servicing it. Ap-
proach any overheated pump cautiously.
Overheated pumps can cause severe
burnsandinjuries.Ifoverheatingofthe
pump occurs:
1. Stop the pump immediately.
2. Ventilate the area.
3. Allowthepumptocompletelycool.
4. Check the temperature before ser-
vicing.
5. Vent the pump slowly and cau-
tiously
6. Refertoinstructionsinthismanual
before restarting the pump.
Impeller Rotation
Checkimpellerrotationasfollows beforeoperation
to ensure thatthe impelleris rotating in the correct
direction.
While checking impeller rotation, secure
thepumptopreventthepowercablefrom
coiling.
Suspend the pump from the lifting device fitted on
the pump.
NOTE
For Autostart models, place a jumper wire across
the on-point and off-point sensing devices before

OM--04796 S SERIES PUMPS
PAGE C -- 3
OPERATION
applying power to check pump rotation.
As viewed from the top, the pump should kick in a
counterclockwise direction; this will indicate that
impeller rotation is correct.
Ifthepump kicksinaclockwisedirection,impeller
rotation is incorrect and the pump must be re-
turnedtothefactoryoraGorman-Ruppauthorized
Submersible Repair Center. If attached, remove
the jumper wire. Since the pump is powered by a
single-phase motor, the direction of rotation can
not be altered by interchanging motor leads at the
control box.
DIRECTION OF
KICKBACK
AT STARTUP
Figure C--1. Checking Pump Rotation
STARTING, STOPPING, AND
OPERATIONAL CHECKS
Starting And Stopping
Do not attempt to operate the pump until
impeller rotation has been checked; im-
proper rotation will affect pump perform-
ance and may damage the pump.
Ifanoptionalcontrolboxis used,follow theinstruc-
tions accompanying the control box, start the
pump, and run any recommended checks.
After the pump and options have been installed in
a wet well so that it is fully submerged, start the
pump as follows.
If wired into an optional manual switch, trip the
switch within the rainproof enclosure to start or
stop the pump.
Ifthepumpisanauto-startmodel,pumpoperation
will be controlled by the built-in liquid sensing de-
vices. When liquid level reaches the on-point (up-
per) device, the pump will switch on and continue
to run until liquid level falls below the off-point (low-
er) device.
NOTE
Distilled water or uncontaminated rain water may
fail to provideconductivity necessaryto trigger the
automatic liquid level sensing devices built intothe
pump.Ifthisoccurs, groundtheon-pointassembly
to convert the pump to manual operation, and
install a float level control system.
If the pump is wired into an optional automatic liq-
uid level control box, set the control box selector
switch to MAN; the pump will continue to run until
the switch returned to OFF, or reset to AUTO.
If desired to operate the pump in the automatic
mode, set the selector switch to AUTO;pumpop-
eration will be controlled by the optional float
switch.Toterminateautomaticmode,movethese-
lector switch to OFF or HAND.
Moving the control box selector switch to
OFF does not terminate incoming power
through the field wiring connected to the
control box.

SSERIESPUMPS OM--04796
PAGE C -- 4 OPERATION
It is recommended that a check valve or throttling
valvebeinstalledinthedischargelineifthereisany
possibility of siphoning or back flow when the
pump is shut off.
Operational Checks
Check the pump for proper operation when first
started and periodically thereafter toidentify minor
problems.
Check the pump for unusual noises or excessive
vibration while it is operating. If noise or vibration
is excessive, stop the pump and refer to the trou-
bleshooting chart for possible causes.
Check the pump strainer screen for clogging
caused by stones, sticks, or other debris. Clean
the strainer screenwhen required. In somecases,
stopping the pump momentarily may back flush
the strainer screen, purging most of the debris
from it. If this fails to clean the screen, remove the
pumpfromthesumpandremovethedebrismanu-
ally. See PUMP DISASSEMBLY in the Mainte-
nance And Repair manual.
Never introduce air or steam pressure
intothe pump casing toremove a block-
age. This could result in personal injury
or damage to the equipment. If back-
flushing is absolutely necessary, limit
liquidpressureinputto50%ofthemaxi-
mum permissible operating pressure
showninthepumpperformancecurve
(refer to the accompanying Parts List
Manual).
Check the pump for overheating. Overheating can
occur if the pump is made to startand stoprepeat-
edly without time to cool off between starts, the liq-
uid level is allowed tofalltoolowto sufficientlycool
the motor, or if the circuit breaker or fuse fails to
provide adequate protection. Operating the pump
against a closed discharge valve for an extended
period will also cause the pump to overheat.
Check the oil level(s) as indicated in the following
LUBRICATION section.
LIQUID LEVEL
Overheating will occur if the liquid falls be-
lowthelevelrequiredtocoolthepumpmo-
tor.
The pump willoperatefullyor partiallysubmerged.
However, since the motor is cooled by the liquid
being pumped, overheating will occur if the liquid
is pumped below the required to cool the motor.
Auto-start models will shut down before the liquid
level falls too low. Non-auto-start models operated
manually or with an optional liquid level device
must remain sufficiently submerged. Do not allow
the liquid level to fall below the top of the barbed
discharge adaptor in order to provide sufficient
cooling to the motor.
COLD WEATHER PRESERVATION
Do not attempt to thaw the pump by us-
ingatorchorothersourceofflame.This
could damage gaskets, O-rings or heat
theoilinthesealhousingabovecritical
temperatures, causing the pump to rup-
ture or explode.
The pump will not freeze as long as the casing is
submerged in liquid. If the casing is not sub-
merged,oriftheliquidbeginstofreeze,removethe
pumpfromthesumporwetwellanddryitthor-
oughly. Run the pump for two or three minutes to
dry the inner walls.
If the pump does freeze while it is out of the liquid,
submerge it until thawed; if the liquid is near freez-
ing,thepumpmustbesubmergedforanextended
periodoftime.Checkthawingbystartingthepump