GORMAN-RUPP PUMPS S3C1 230V 1P Application guide

OM-07267-06
January 09, 2020
GORMAN‐RUPP PUMPS
www.grpumps.com
e2020 Gorman‐Rupp Pumps Printed in U.S.A.
INSTALLATION, OPERATION,
AND MAINTENANCE MANUAL
WITH PARTS LIST
S SERIES
SUBMERSIBLE PUMP
MODEL
S3C1 230V 1P & 3P,
S3C1 460V 3P

Register your new
Gorman‐Rupp pump online at
www.grpumps.com
Valid serial number and e‐mail address required.
RECORD YOUR PUMP MODEL AND SERIAL NUMBER
Please record your pump model and serial number in the
spaces provided below. Your Gorman‐Rupp distributor
needs this information when you require parts or service.
Pump Model:
Serial Number:

TABLE OF CONTENTS
i
INTRODUCTION PAGE I - 1.................................................
SAFETY ‐ SECTION A PAGE A - 1............................................
INSTALLATION - SECTION B PAGE B - 1....................................
GENERAL INFORMATION PAGE B - 1..................................................
Pump Model Designation PAGE B - 1...............................................
PREINSTALLATION INSPECTION PAGE B - 1............................................
PUMP SEAL PAGE B - 1..............................................................
LUBRICATION PAGE B - 1.............................................................
PUMP INSTALLATION PAGE B - 2......................................................
Pump Motor Specifications PAGE B - 2..............................................
Pump Dimensions PAGE B - 2.....................................................
Lifting PAGE B - 3.................................................................
Positioning of Pump PAGE B - 3....................................................
Piping PAGE B - 4................................................................
ELECTRICAL CONNECTIONS PAGE B - 4...............................................
Dual Voltage Usage PAGE B - 5....................................................
Field Wiring Connections (Incoming Power) PAGE B - 5...............................
Grounding Methods PAGE B - 6....................................................
Pump Power Cable Connections PAGE B - 7.........................................
Control Box Specifications PAGE B - 8..............................................
Motor Cable Grounding Test PAGE B - 8.............................................
Liquid Level Devices PAGE B - 8....................................................
WIRING DIAGRAMS PAGE B - 10.......................................................
OPERATION - SECTION C PAGE C - 1......................................
PRIMING PAGE C - 1.................................................................
Hand Primers PAGE C - 1..........................................................
STARTING PAGE C - 1................................................................
OPERATION PAGE C - 2..............................................................
Leakage PAGE C - 2..............................................................
Liquid Temperature And Overheating PAGE C - 2.....................................
Strainer Check PAGE C - 2.........................................................
Pump Vacuum Check PAGE C - 2..................................................
STOPPING PAGE C - 2................................................................
Cold Weather Preservation PAGE C - 2..............................................
BEARING TEMPERATURE CHECK PAGE C - 3..........................................
TROUBLESHOOTING - SECTION D PAGE D - 1..............................
PREVENTIVE MAINTENANCE PAGE D - 3...............................................

TABLE OF CONTENTS
(continued)
ii
PUMP MAINTENANCE AND REPAIR ‐ SECTION E PAGE E - 1.................
STANDARD PERFORMANCE CURVE PAGE E - 1........................................
PARTS LISTS:
Pump Model S3B1 230V 1P PAGE E - 3.............................................
Pump Model S3B1 230V 3P PAGE E - 5.............................................
Pump Model S3B1 460V 3P PAGE E - 7.............................................
Terminal Housing and Cable Assembly PAGE E - 9...................................
PUMP END DISASSEMBLY PAGE E - 10.................................................
Strainer Removal PAGE E - 11.......................................................
Draining Oil From Seal Cavity PAGE E - 11............................................
Draining Oil From Motor Cavity PAGE E - 11..........................................
Positioning Pump For Disassembly PAGE E - 11.......................................
Suction Head Removal PAGE E - 11.................................................
Impeller Removal PAGE E - 11......................................................
Lower Seal Removal PAGE E - 12....................................................
Upper Seal Removal PAGE E - 12...................................................
PUMP END REASSEMBLY PAGE E - 12..................................................
Cleaning and Inspection of Pump Parts PAGE E - 12...................................
Upper Seal Installation PAGE E - 13..................................................
Lower Seal Installation PAGE E - 14..................................................
Impeller Installation PAGE E - 15.....................................................
Suction Head Installation PAGE E - 15................................................
Impeller Clearance PAGE E - 15.....................................................
Strainer Installation PAGE E - 15.....................................................
MOTOR DISASSEMBLY PAGE E - 16....................................................
Terminal Housing and Power Cable Removal and Disassembly PAGE E - 16..............
Intermediate and Rotor Disassembly PAGE E - 17.....................................
Bearing Removal PAGE E - 17.......................................................
Stator Removal PAGE E - 17........................................................
Relief Valve PAGE E - 18............................................................
Hoisting Bail PAGE E - 18...........................................................
MOTOR REASSEMBLY PAGE E - 18.....................................................
Stator Installation PAGE E - 19......................................................
Bearing Installation PAGE E - 19.....................................................
Rotor and Intermediate Installation PAGE E - 21.......................................
Terminal Housing and Power Cable Reassembly ans Installation PAGE E - 21.............
Sealing Terminal Housing Connections With Silicone Adhesive PAGE E - 22..............
Sealing Terminal Plate Connections With Potting Compound PAGE E - 23................
Terminal Housing Installation PAGE E - 24............................................
FINAL ASSEMBLY PAGE E - 24.........................................................
VACUUM TESTING PAGE E - 25........................................................
LUBRICATION PAGE E - 25.............................................................
Seal Cavity PAGE E - 25............................................................
Motor Housing Cavity PAGE E - 26...................................................

S SERIES PUMPS OM-07267
PAGE I - 1INTRODUCTION
INTRODUCTION
Thank You for purchasing a Gorman‐Rupp pump.
Read this manual carefully to learn how to safely
install and operate your pump. Failure to do so
could result in personal injury or damage to the
pump.
This manual will alert personnel to known proce
dures which require special attention, to those
which could damage equipment, and to those
which could be dangerous to personnel. However,
this manual cannot possibly anticipate and provide
detailed precautions for every situation that might
occur during maintenance of the unit. Therefore, it
is the responsibility of the owner/maintenance per
sonnel to ensure that only safe, established main
tenance procedures are used, and that any proce
dures not addressed in this manual are performed
only after establishing that neither personal safety
nor pump integrity are compromised by such prac
tices.
If there are any questions regarding the pump or
its application which are not covered in this man
ual or in other literature accompanying this unit,
please contact your Gorman‐Rupp distributor, or
the Gorman‐Rupp Company:
The Gorman‐Rupp Company
P.O. Box 1217
Mansfield, Ohio 44901-1217
Phone: [phone]
or:
Gorman‐Rupp of Canada Limited
70 Burwell Road
St. Thomas, Ontario N5P 3R7
Phone: [phone]
For information or technical assistance on the pow
er source, contact the power source manufactur
er's local dealer or representative.
The following are used to alert maintenance per
sonnel to procedures which require special atten
tion, to those which could damage equipment, and
to those which could be dangerous to personnel:
Immediate hazards which WILL result in
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.
Hazards or unsafe practices which COULD
result in minor personal injury or product
or property damage. These instructions
describe the requirements and the possi
ble 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-07267 S SERIES PUMPS
PAGE A - 1SAFETY
SAFETY - SECTION A
This information applies to the S Series
submersible motor driven pumps and
control boxes.
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.
Before attempting to open or service the
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, or flammable materials.
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.
Before connecting any cable to the con
trol box, be sure to ground the control
box. Refer to the Control Box Manual for
the suggested grounding methods.
The pump motor is designed to be oper
ated through the control box furnished
with the pump. The control box provides
overload protection and power control.
Do not connect the pump motor directly
to the incoming power lines.
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 enclosure are properly
grounded; never use gas pipe as an
electrical ground. Be sure that the in
coming power matches the voltage and
phase of the pump and control before
connecting the power source. Do not
run the pump if the voltage is not within
the limits. If the overload unit is tripped
during pump operation, correct the
problem before restarting the pump.
The electrical power used to operate
this pump is high enough to cause inju
ry or death. Make certain that the control
handle on the control box is in the OFF

S SERIES PUMPS OM-07267
PAGE A-2 SAFETY
position and locked out, or that the pow
er supply to the control box has been
otherwise cut off and locked out, before
attempting to open or service the pump
assembly. Tag electrical circuits to pre
vent accidental start‐up.
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.
All electrical connections must be in ac
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.
Death or serious personal injury and
damage to the pump or components
can occur if proper lifting procedures
are not observed. Make certain that
hoists, chains, slings or cables are in
good working condition and of suffi
cient capacity and that they are posi
tioned so that loads will be balanced
and the pump or components will not be
damaged when lifting. Do not attempt to
lift this pump by the motor or control
cables, or the piping. Attach proper lift
ing equipment to the lifting bail fitted on
the pump. Lift the pump or component
only as high as necessary and keep per
sonnel away from suspended objects.
After the pump has been installed, make
certain that the pump and all piping or
hose connections are secure before op
eration.
Obtain the services of a qualified elec
trician to troubleshoot, test and/or ser
vice the electrical components of this
pump.
Approach the pump cautiously after it
has been running. Although the motor is
cooled by the liquid being pumped, nor
mal operating temperatures can be high
enough to cause burns. The tempera
ture will be especially high if operated
against a closed discharge valve. Never
operate against a closed discharge
valve for long periods of time.
Do not remove plates, covers, gauges,
pipe plugs, or fittings from an over
heated pump. Vapor pressure within the
pump can cause parts being disen
gaged to be ejected with great force. Al

OM-07267 S SERIES PUMPS
PAGE A - 3SAFETY
low the pump to completely cool before
servicing.
Do not attempt to lift the pump by the
motor power cable or the piping. Attach
proper lifting equipment to the lifting
device fitted to the pump. If chains or
cable are wrapped around the pump to
lift it, make certain that they are posi
tioned so as not to damage the pump,
and so that the load will be balanced.
Pumps and related equipment must be
installed and operated according to all na
tional, local and industry standards.

S SERIES PUMPS OM-07267
PAGE B - 1INSTALLATION
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 general rec
ommendations and practices required to inspect,
position, and arrange the pump and piping. If there
are any questions concerning your specific instal
lation, contact your Gorman‐Rupp distributor or
the Gorman‐Rupp Company.
Liquid level devices are available from Gorman‐
Rupp as optional equipment. For information on
installing and operating these items, refer to the lit
erature accompanying them.
Pump Model Designation
Following is a description of the model numbering
system for S Series pumps. These submersible
pumps are available in a range of sizes. Refer to the
following chart to identify the size for your specific
pump model.
S
Series
Discharge Size
Pump Hydraulics
Pump Construction
H.P. (If Shown)
Voltage/Phase
3 C 1 E 230/3- 6.2
Pump Model
PREINSTALLATION INSPECTION
The pump assembly was inspected and tested be
fore shipment from the factory. Before installation,
check for damage which may have occurred dur
ing shipment. Check as follows:
a. Inspect the pump assembly for cracks, dents,
damaged threads, and other obvious dam
age.
b. Check for loose attaching hardware. Since
gaskets tend to shrink after drying, check for
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
on the pump, and perform all duties indicated.
f. Check for oil leaks. If there is any indication of
an oil leak, see LUBRICATION at the end of
this manual.
PUMP SEAL
S Series pumps utilize one of the following sealing
methods.
1. There are two shaft seals in the pump. The
lower seal prevents liquid from entering the in
termediate cavity at the impeller end. The up
per seal prevents oil leakage from the motor
housing cavity and acts as back‐up protection
in the event of lower seal failure.
2. The pump is equipped with one double‐faced
seal assembly. It is designed to prevent the
liquid being pumped from entering the inter
mediate cavity at the impeller end, and to pre
vent moisture from entering the motor hous
ing cavity at the motor end.
Regardless of which sealing method is used, the
seal is lubricated by premium quality submersible
pump oil.
LUBRICATION
S series pumps are lubricated in one of the follow
ing methods.
1. Some pumps utilize two lubrication cavities.
The motor housing cavity provides lubrication
to the motor assembly and bearings, while the
intermediate cavity provides lubrication to the
pump seal.
2. Some pumps utilize one lubrication cavity, lo
cated just behind the seal plate. It is filled with
premium quality submersible pump oil which
lubricates the pump seal. The motor operates
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

OM-07267 S SERIES PUMPS
PAGE B - 2 INSTALLATION
(see LUBRICATION in the MAINTENANCE AND
REPAIR MANUAL). An additional quart (0,9 liter)
of oil is provided to “top off” the oil level in the pump
motor cavity, if so required. If the oil level is abnor
mally low, determine the cause before putting the
pump into service.
Due to differences in pump design, the quantity of
oil and manner in which oil is to be added to the
seal cavity varies between pump models. Refer to
Table B‐2 for oil capacities and positions for filling
the seal cavity in each pump. Motor cavities requir
ing lubrication should always be positioned verti
cally for filling. Refer to LUBRICATION, Section C
for lubrication specifications and intervals.
PUMP INSTALLATION
Pump Motor Specifications
See following tables for pump specifications.
Table B‐1. Pump Specifications
Dual
Voltage
Locked
Rotor
Amperes
Pump
HP/
KW
Motor
Speed
(RPM)
Full
Load
Amperes
No
Load
Amperes
Discharge
Size
(NPT)
Model Voltage/
Phase
S3C
230/1 NO
6 HP 3450
34
23
8
12
95
100 3 INCH
230/3
460/3 YES 11.5 6 50
Table B‐2. Additional Specifications
Pump
Model
Voltage/
Phase
230/3
460/3
Approximate
Weight - Lbs. (kg) Oil Capacity
Ounces (Liters)
Seal Cavity
Filling
Position
(H)orizontal
(V)ertical
*(A)ngle
Pump 50 Ft. Cable Seal
Cavity
Motor
Cavity
230/1
S3C 77 (35) 32.5 (15) 16 (0,5) 96 (2,8) H
* Position Pumps at Approximately 30off Vertical
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.
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. Failure to observe these require
ments could result in injury or death to
personnel.
Do not allow the free end of the power
cable to enter the liquid being pumped.
The free end of the cable must be kept dry