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Sears 390.2521 - page 1
SEARS OWNER'S MANUAL MODEL NO. 390.2521 CAUTION: Read and Follow All Safety Rules and Operating Instructions Before First Use of This Product. Save This Manual For Future Reference. I:RI:I FTSMI:IN ° PROFESSIONAL 1/2 HP SHALLOW WELL WATER SYSTEM • Safety Instructions • Installation • Electrical • Maintenance • Repair Parts Sears, Ro ...
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Sears 390.2521 - page 2
CONTENTS INTRODUCTION/WARRANTY 2 PUMP PERFORS*L_CE 3 bL_JOR COMPONENTS 3 INST.M.L__TIO N 4-5 ELECTRIC.M. 6-7 OPERATION MAINTEN?O,rCE 8-10 HELPFUL HINTS 10 TROUBLESHOOTING GUIDE 1 1 REPAIR P.M/TS . 12-14 INTRODUCTION Please read our mstructions before mstallmg and usmg }'our Shallow Well Water System Tilts will help you obtain the full benefits ...
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Sears 390.2521 - page 3
SAFETY INSTRUCTIONS (Continued) 6. Disconnect electrical power source before installing or working on pump. 7. Ground pump with a ground wJ_e run from grounding lug on motor to a grounded lead in the service panel. 8. Line voltage and frequency of electrical power supply must agree with motor nameplate. 9. Use of fuses or wire smaller than size rec ...
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Sears 390.2521 - page 4
INSTALLATION INSTALLATION Piping in the Well The Shallow Well Water System can be installed on a dug well, drilled well or with a driven point. In a dug or cased well, a foot valve and strainer should be installed for easy priming. It should be installed five to ten feet below the low- est level to which the water vdll drop while the pump is op- er ...
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Sears 390.2521 - page 5
INSTALLATION 1-1/4" 1-1/2" 2" Up to 25 Ft. 25 to 50 Ft. 50 to 200 Ft. Discharge Pipe Sizes When the pttmp is some distance from the house or point of water use, the discharge pipe size should be increased to reduce pressure losses caused by friction. 1" 1-1/4" 1-1/2" Up to 25 Ft. 25 to 1O0 Ft. 1O0 to 600 Ft. Tank Tanks ...
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Sears 390.2521 - page 6
ELECTRICAL Disconnect power before working on pump, motor, pressure switch, or wiring. Motor Switch Settings ff the motor can operate at either 115 or 230 volts, it is set at the factory to 230 volts. Do not change motor voltage setting if line voltage is 230 volts, or if you have a single voltage motor. NOTICE: Never wire a 115 volt motor to a 230 ...
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Sears 390.2521 - page 7
ELECTRICAL NOTICE: Dual-voltage motors are factory wired for 230 volts. If necessary, reconnect the motor for 115 volts, as shown. Do not alter the wiring in single voltage motors. Install, ground, wire, and maintain your pump in compli- ance with the National Electrical Code (NEC) or the Canadian Electrical Code (CEC), as applicable, and with all ...
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Sears 390.2521 - page 8
MAINTENANCE Lubrication It is not necessary to lubricate the pump or its motor. The motor beatings are lubricated for life. The mechanical shaft seal in the pump is water lubricated and self-adjusting. Draining for Winter &WARNING] Risk of electric shock. Disconnect power before working on unit. Pump should be drained whenever it is disconnecte ...
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Sears 390.2521 - page 9
MAINTENANCE DISASSEMBLY AND ASSEMBLY OF PUMP AWARNING] Risk of electric shock. Ground unit and disconnect power before attempting any work on pump or motor. Your Sears pmlap is designed for ease in servicing. Should repair or replacement of the motor or seal be needed, the pump and piping do not need to be disconnected or dis- turbed. 1. Disassembl ...
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Sears 390.2521 - page 10
MAINTENANCE / HELPFUL HINTS B. Wet outer edge of "O" Ring with detergent solution. C. With finger pressure press seat firmly and squarely into cavity. See Figure 9A. Polished face of seat faces inside of pump. If seat vdll not locate properly, place cardboard washer over polished face and use piece of 3/4" standard pipe for pressing ...
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Sears 390.2521 - page 11
TROUBLESHOOTING GUIDE TROUBLE POSSIBLE CAUSES REMEDIES Motor will not run 1. Disconnect switch is off 1. Be sure switch is on 2. Fuse is blown 2. Replace fuse 3. Starting switch is defective 3. Replace starting switch 4. Wires at motor are loose, 4. Refer to instructions on wiring disconnected, or wired incorrectly *5. Motor is wired incorrectry 5. ...
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Sears 390.2521 - page 12
REPAIR PARTS 29 3O 1 / Pump Only- Model 390.2521 2 3 4 5 28 26 _25 11 16 17 23 587 1193 8 9 22 24 19 21 10 2O 12 ...
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Sears 390.2521 - page 13
REPAIR PARTS Key Model 390.2521 Part No. 1/2 HP Description 1_-_ - 2 3* 4 5 6 7 8 9 10 11 12 13 14 15 16 16 17 18 19 20 21" 22 23 24 25 26* 26A* 27 28 29* 30 J218-953C 17351 -OOO9 WC78-41T L176-47P U9-399 U 109-6A J105-4OPE J1-39P C 19-54SS U9-201 N32P-66 N34P-19 N76-29P J20-18 N 176-28PB N76-28P U37-673P U111-212T U9-226 N 166-5P U212-68T U30 ...
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Sears 390.2521 - page 14
REPAIR PARTS Tank Only - Model 390.2521 6 REPAIR PARTS Model 390.262"1 Key 1/2 HP Qty. No. Part Number Used 1 29135 1 "1 2 3t 4 5 6-i- U20-13 U31-446P U74-37H U 19-55SS 1 1 1 6 1 2 2 Description Tank Assembly (Includes Diaphragm, Elbow, Valve, Nuts, Washers, & Inlet Flange) Bag - Vinyl Air Valve w/Cap Inlet Flange Nut - 5/16-18 Hex Ho ...
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Sears 390.2521 - page 15
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Sears 390.2521 - page 16
SEARS OWNER'S MANUAL Model No. 390.2521 The model number of your Shallow Well Water System will be found on the pump body When requesting service or ordering parts, always give the following information: • Product Type • Model Number • Part Number • Part Description I:RRFTSMRN ° PROFESSIONAL 1/2 HP SHALLOW WELL WATER SYSTEM For the re ...
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