ACDE OM‐04829‐02 November 27, 2001 Rev. B 10‐30‐2013 INSTALLATION, OPERATION, AND MAINTENANCE MANUAL WITH PARTS LIST 10 SERIES PUMPS MODELS 11 1/2A52-E2 1P 11 1/2A52-E2 3P THE GORMAN‐RUPP COMPANY MANSFIELD, OHIO www.grpumps.com GORMAN‐RUPP OF CANADA LIMITED ST. THOMAS, ONTARIO, CANADA 2001 The Gorman‐Rupp Company Printed in U.S.A.
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.
TABLE OF CONTENTS INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PAGE I - 1 SAFETY ‐ SECTION A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PAGE A - 1 INSTALLATION - SECTION B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PAGE B - 1 Pump Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TABLE OF CONTENTS (continued) PUMP MAINTENANCE AND REPAIR ‐ SECTION E . . . . . . . . . . . . . . . . . STANDARD PERFORMANCE CURVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PARTS LISTS: Pump Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PUMP AND SEAL DISASSEMBLY AND REASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . Suction Check Valve Removal and Disassembly . . . . . . . . . . . . .
10 SERIES OM-04829 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 pump is a 10 Series, semi‐open impeller, self‐ priming centrifugal model with a suction check valve. It is close‐coupled to a 2 H.P., single phase or three phase, totally enclosed fan‐cooled electric motor.
10 SERIES OM-04829 SAFETY ‐ SECTION A This information applies to 10 Series electric motor driven pumps. Refer to the manual accompanying the motor before attempting to begin operation. This manual will alert personnel to known procedures which require spe cial attention, to those which could damage equipment, and to those which could be dangerous to personnel.
OM-04829 Do not operate the pump against a closed discharge valve for long periods of time. If operated against a closed dis charge valve, pump components will deteriorate, and the liquid could come to a boil, build pressure, and cause the pump casing to rupture or explode. Overheated pumps can cause severe burns and injuries. If overheating of the pump occurs: 1. Stop the pump immediately. 2. Ventilate the area. 3. Allow the pump to completely cool. 4.
10 SERIES OM-04829 INSTALLATION - SECTION B Review all SAFETY information in Section A. Since pump installations are seldom identical, this section offers only general recommendations and practices required to inspect, position, and ar range the pump and piping. specific application.
OM-04829 PREINSTALLATION INSPECTION The pump assembly was inspected and tested be fore shipment from the factory. Before installation, inspect the pump for damage which may have oc curred during shipment. Check as follows: a. Inspect the pump and motor for cracks, dents, damaged threads, and other obvious damage. b. Check for and tighten loose attaching hard ware. Since gaskets tend to shrink after dry ing, check for loose hardware at mating sur faces. c.
SERIES SUCTION AND DISCHARGE PIPING Pump performance is adversely effected by in creased suction lift, discharge elevation, and fric tion losses. See the performance curve on Page E‐1 to be sure your overall application allows pump to operate within the safe operation range. Materials Either pipe or hose maybe used for suction and discharge lines; however, the materials must be compatible with the liquid being pumped.
OM-04829 10 SERIES Suction Lines In Sumps If a single suction line is installed in a sump, it should be positioned away from the wall of the sump at a distance equal to 1‐1/2 times the diame ter of the suction line If there is a liquid flow from an open pipe into the sump, the flow should be kept away from the suc tion inlet because the inflow will carry air down into the sump, and air entering the suction line will re duce pump efficiency.
10 SERIES DISCHARGE LINES Siphoning Do not terminate the discharge line at a level lower than that of the liquid being pumped unless a si phon breaker is used in the line. Otherwise, a si phoning action causing damage to the pump could result. Valves If a throttling valve is desired in the discharge line, use a valve as large as the largest pipe to minimize friction losses. Never install a throttling valve in a suction line. OM-04829 air from the top of the pump during the priming process.
OM-04829 10 SERIES DISCHARGE PIPE CLEAN‐OUT COVER INSTALL AIR RELEASE VALVE IN HORIZONTAL POSITION 90 LONG RADIUS ELBOW SUPPORT BRACKET BLEED LINE 1” (25,4 MM) DIA. MIN. (CUSTOMER FUR NISHED) DO NOT EX TEND BELOW PUMP OFF LIQUID LEVEL DISCHARGE CHECK VALVE PUMP DISCHARGE SELF‐PRIMING CENTRIFUGAL PUMP SUCTION LINE WET WELL OR SUMP Figure 3. Typical Automatic Air Release Valve Installation Connect the valve outlet to a bleed line which slopes back to the wet well or sump.
10 SERIES OM-04829 ELECTRICAL CONNECTIONS Before connecting the motor to the incoming power, check that the electrical service available matches the pump motor requirements stamped on the motor nameplate. The electrical power used to operate this pump is high enough to cause inju ry or death. Obtain the services of a qu alified electrician to make all electrical connections. VOLTAGE INSTALLATION PHASE Do not install and operate a non‐explo sion proof motor in an explosive atmo sphere.
OM-04829 10 SERIES OPERATION - SECTION C Review all SAFETY information in Section A. Follow the instructions on all tags, labels and decals attached to the pump. This pump is designed to handle most non‐volatile, non‐flammable liquids containing specified entrained solids. Do not attempt to pump volatile, corro sive, or flammable liquids which may damage the pump or endanger person nel as a result of pump failure.
OM-04829 Consult the operating manual furnished with the pump motor before attempting to start the motor. If rotation is incorrect on a three‐phase motor, have a qualified electrician interchange any two of the three phase wires to change direction. If rotation is incorrect on a single‐phase motor, consult the lit erature supplied with the motor for specific instruc tions. OPERATION 10 SERIES Liquid Temperature And Overheating The maximum liquid temperature for this pump is 160 F (71 C).
OM-04829 10 SERIES Open the suction line, and read the vacuum gauge with the pump primed and at operation speed. Shut off the pump. The vacuum gauge reading will immediately drop proportionate to static suction lift, and should then stabilize. If the vacuum reading falls off rapidly after stabilization, an air leak exists. Before checking for the source of the leak, check the point of installation of the vacuum gauge. STOPPING Never halt the flow of liquid suddenly.
10 SERIES OM-04829 TROUBLESHOOTING - SECTION D Review all SAFETY information in Section A. Before attempting to open or service the pump: 1. Familiarize yourself with this manual. 2. Disconnect the incoming power to the motor and lock it out to ensure that the pump will remain inoperative. 3. Allow the pump to completely cool if overheated. 4. Check the temperature before open ing any covers, plates, or plugs. 5. Close the suction and discharge valves. 6. Vent the pump slowly and cautiously. 7.
OM-04829 TROUBLE PUMP STOPS OR FAILS TO DELIVER RATED FLOW OR PRESSURE (cont.) PUMP REQUIRES TOO MUCH POWER PUMP CLOGS FREQUENTLY EXCESSIVE NOISE PAGE D - 2 10 SERIES POSSIBLE CAUSE PROBABLE REMEDY Leaking or worn seal or pump gasket. Check pump vacuum. Replace leaking or worn seal or gasket. Impeller clogged. Free impeller of debris. Low or incorrect voltage. Measure control box voltage, both when pump is running and when shut off. No voltage at line side of circuit breaker.
10 SERIES OM-04829 PREVENTIVE MAINTENANCE Since pump applications are seldom identical, and pump wear is directly affected by such things as the abrasive qualities, pressure and temperature of the liquid being pumped, this section is intended only to provide general recommendations and practices for preventive maintenance. Regardless of the application however, following a routine pre ventive maintenance schedule will help assure trouble‐free performance and long life from your Gorman‐Rupp pump.
10 SERIES OM-04829 PUMP MAINTENANCE AND REPAIR ‐ SECTION E MAINTENANCE AND REPAIR OF THE WEARING PARTS OF THE PUMP WILL MAINTAIN PEAK OPERATING PERFORMANCE. STANDARD PERFORMANCE FOR PUMP MODEL 11 1/2A52-E2 1P AND 11 1/2A52-E2 3P Based on 70 F (21 C) clear water at sea level with minimum suction lift. Since pump installations are seldom identical, your performance may be dif ferent due to such factors as viscosity, specific gravity, elevation, temperature, and impeller trim.
OM-04829 10 SERIES SECTION DRAWING PARTS PAGE Figure 1.
10 SERIES OM-04829 PARTS LIST Pump Model 11 1/2A52-E2 1P And 11 1/2A52-E2 3P (From S/N 1235018 Up) If your pump serial number is followed by an “N”, your pump is NOT a standard production model. Contact the Gorman‐Rupp Company to verify part numbers. ITEM PART NAME NO.
OM-04829 10 SERIES PUMP AND SEAL DISASSEMBLY AND REASSEMBLY 3. Review all SAFETY information in Section A. 4. Follow the instructions on all tags, label and de cals attached to the pump. 5. This pump requires little service due to its rugged, minimum‐maintenance design. However, if it be comes necessary to inspect or replace the wearing parts, follow these instructions which are keyed to the sectional view (see Figure 1) and the accompa nying parts list.
10 SERIES Pump Casing Removal 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. Suction and dis charge hoses and piping must be re moved from the pump before lifting.
OM-04829 10 SERIES Inspect the seal components for wear, scoring, grooves, and other damage that might cause leak age. Clean and polish the shaft sleeve, or replace it if there are nicks or cuts on either end. If any com ponents are worn, replace the complete seal; never mix old and new seal parts. If a replacement seal is being used, remove it from the container and inspect the precision finished RETAINER SPRING faces to ensure that they are free of any foreign matter.
10 SERIES OM-04829 Inspect the impeller, and replace it if cracked or badly worn. Install the same thickness of impeller shims (12) as previously removed, and screw the impeller onto the shaft until tight. Clean any scales or debris from the contacting sur faces on the pump casing that might prevent a good seal with the back cover. Replace the back cover gasket (26) and slide the back cover assem bly into the pump casing. Be sure the wear plate does not bind against the impeller. A clearance of .
OM-04829 10 SERIES LUBRICATION Motor Seal Assembly Consult the literature supplied with the motor, or contact your local motor representative. The seal assembly is lubricated by the medium be ing pumped, and no additional lubrication is re quired.
For U.S. and International Warranty Information, Please Visit www.grpumps.com/warranty or call: U.S.: 419-755-1280 International: +1-419-755-1352 For Canadian Warranty Information, Please Visit www.grcanada.com/warranty or call: 519-631-2870 THE GORMAN‐RUPP COMPANY MANSFIELD, OHIO GORMAN‐RUPP OF CANADA LIMITED ST.
