Sears 390 2521 Users Manual
3902521 3902521 CRAFTSMAN PUMP - Manuals and Guides L0411410 View the owners manual for your CRAFTSMAN PUMP #3902521.
CRAFTSMAN Pump Manual L0411410 CRAFTSMAN Pump Owner's Manual, CRAFTSMAN Pump installation guides
390.2521 L0411410
390.2521 to the manual f8385475-b00a-4059-921b-0cd081c2a140
2015-02-05
: Sears Sears-390-2521-Users-Manual-399759 sears-390-2521-users-manual-399759 sears pdf
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SEARS OWNER'S MANUAL MODEL NO. 390.2521 I:RI:IFTSMI:IN° CAUTION: Read and Follow All Safety Rulesand Operating Instructions Before First Use of This Product. Save This Manual For Future Reference. PROFESSIONAL 1/2 HP SHALLOW WELL WATER SYSTEM • Safety Instructions • Installation • Electrical • Maintenance • Repair Parts Sears, Roebuck and Co., Hoffman Estates, IL 60179 PRINTED IN USA U.S.A. Form No F642-04075 (8/3/o4) CONTENTS INTRODUCTION INTRODUCTION/WARRANTY 2 PUMP PERFORS*L_CE bL_JOR COMPONENTS INST.M.L__TION ELECTRIC.M. OPERATION Please read our mstructions before mstallmg and usmg }'our Shallow Well Water System Tilts will help you obtain the full benefits of the qua]ity and convenience budt into this equipment It wall also help you avoid any needless setaace expense resulting from causes beyond our control which are not covered by our warranty 3 3 4-5 6-7 MAINTEN?O,rCE HELPFUL HINTS TROUBLESHOOTING GUIDE REPAIR P.M/TS 8-10 10 11 . 12-14 FULL ONE YEAR WARRANTY ON CRAFTSMAN* WELL Forone year from the date of purclmse, Searswit1repalror replacewed pump, _ee of charge, ffdefecove _ _ PUMP or _p UMITED WARRANTY ON CRAFTSMAN* PROFESSIONAL HYDRO-GLASS ®WELL PUMP After one yezr and throughthree years from dxedate ofp_ Sears_ furnish, fxeeofctme_ a replacemempartfor anyd_fecttve part You pay labor FULL FIVE YEAR WARRANTY ON CRAFTSMAN ® CAPTIVE AIR TANK Forf_'e yearnfrom date o_purctm_ SearswdI repair_ replace die tank,free of c_, ff_ m_ _ wor_s_ Tlm _xwamy does not cover repairs or replacementpartsnece-_a_-becauseof abuse or negligence, including_a_uretoin.staR,ad/ttst and olxtat¢ thts pump according to the instructiomla the ov.mersmanual. LIMITATION OF UABIMTY SFJ_d WILL .NOT BE LLABZE _OR LOSS 0£ DAMAGE TO PROPERLY OR ANY L,VCIDENTAL DAMAGE DUE DZREOT_ }"OR I3_tT.ECrL Y FROM THE USE OF THIS PRODS, Some smms do not allow the exclusion or limitaT_on of mctdeafai WARR_#t TY SERVICE 1S A I *AIL4B LE B Y $g_IPL Y CONrACTING or consequential THE _ _ages, OR CONSEQt.rF.I,FIIAL LOSS OR EXPE.¥SE FROM PROPERTY so the above limitauon or exclusion may not apply to you S_-AR$ SERVICE CEN'IZ_DEPARTME NI" IN THE UA'ITED STA TE£ Tluswarrant, apphesonlywhde thisproductism theUnitedStates Tlaswarran_g_ves youspect_legaIrigims,andyoumayalsohaveotherrightswhmhvat from statetostate Sears, Roebuck and Co., Dept. 617_€A, Hoffman Estates, IL 60179 READ AND FOLLOW Carefully read nmnual or on and follow pump. all safety instructions SAFETY INSTRUCTIONS! in this _ Motor normaUy operates at tugb temperature and will be too hot to touch It ts protected from heat damage dunng operation by an automatic internal cutoffswltch Before handhng pump or motor, stop motor and allow to cool for 20 minutes _k This is the safety alert s3m-tbol. XX'hen you see ttus symbol on your pump or m this manual, took for one of tbe following stgna] words and be alert to the potential for persona] mlury_ warns persona] mjury, death about or malor [A WARNING_warns about nous personal nored _ minor mlury, warns personal The word tmportant hazards death about that will property bazards cause damage ff ignored that will or can cause or malor propert 3" damage hazards mlu_ " or property that damage NOTICE indicates specml but not related to hazards will or can To avotd nsk of serious boddy injury and propert3." damage, read safety tostructions carefully before lostallmg pump 2 FoUow local and/or natmnal codes when installing pump 3 Keep well covered whde iastalhng pump to prevent leaves and other debns from falling into well, contammatmg weU and posstbly damaging pump 4 Protect pump and ptpmg &stem from freezmg Allo,_ang pump or water system to freeze could severely damage pump and vmds warran D, seff ig- cause ff ignored instructions 1 senous which are plumbing and elecmcal I_kWARNING_JTo avoid serious injury and equipment damage, limit system pressure to 100 pounds per square inch (PSI) or below at all times. Overpressure can cause tank blo_atp; install relief valve capable of passing full pump volume at 100 PSI. _it CAUTION J Never run pump dt T Running pump without water may cause pump to overheat, damaging seal and possibly causing bums to persons handling pump Fill pump with water before starting 5 [AWARNING] Never run pump against closed discharge. To do so can boil water inside pump, causing hazardous pressure in uniL risk of explosion and possibly scalding persons handling pump. ",Xqth a new well test well for purity before local Health Department for procedure i 2 Consult m [akWARNING]Hazardous cause use death, or start voltage. fires. Can shock, burn, SAFETY INSTRUCTIONS 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. TABLE 8. Line voltage and frequency of electrical power supply must agree with motor nameplate. 9. Use of fuses or wire smaller than size recommended in owner's manual can cause overheating, possible fires, and will void warranty. I - Pump Performance NOTE: (Continued) (In Gallons per Minute) This system is designed for pumping depths of 20 feet or Jess. Discharge Pump Model Description 390.2521 1/2 HP S.W Jet BASIC TOOLS Pumping Depth in Feet Suct. Disch. Pressure PSI 5' 10' 15' 20' 1-1/4" 1" 40 8.2 7.3 6.2 5.0 AND MATERIALS NEEDED Plastic Pipe Installation Tools Materials Pipe Wrenches Plastic Pipe and Fittings (as required to complete job). Screwdriver Knife or Saw to Cut Plastic Pipe Teflon Tape (DO NOT use joint compound on plastic fittings). Tire Pressure Gauge Galvanized Steel Pipe Installation Tools Materials Pipe Wrenches Galvanized Pipe and Fittings (as required to complete job). Screwdriver Pipe Cutting and Threading Tire Pressure Gauge Tools MAJOR Impeller Pipe Joint Compound COMPONENTS AND or Teflon WHAT Pressure and Jet Tape THEY DO Switch Impeller turns with motor shaft, causing water to fly out from its rim by centrifugal force. Impeller rotation creates a vacuum which pulls in more water. Part of the water is diverted back to the jet where it passes through the nozzle and venturi. This creates more vacuum to draw in more water. The pressure switch provides for automatic operation. Pump starts when pressure drops to 40 pounds and stops when pressure reaches 60 pounds. In shallow wells (less than 20 feet deep), the vacuum created at the pump is enough to pull water to the pump. Therefore, for shallow well use the jet is built into the pmnp. This pump is equipped with a buik:m check valve. Install a check valve as close to well as possible on well point installations. A foot valve must be installed in the well on dug or cased wells. See Figures 2A and 2B, Page 4. For long horizontal pipe runs, install check valve as close to well as possible (all types of wells). Pre-Charged Check Valve or Foot Valve Tank The tank serves two functions. It provides a reservoir of water under pressure and maintains a cushion of air pressure to prevent pipe hammering and possible damage to plumbing components. When water is drawn off through the house fixtures, the pressure in the tank is lowered and the pump starts, 3 INSTALLATION INSTALLATION Piping For a pump at sea level mounted directly over the well, be sure the total lift from the pumping water level to the pump does not exceed 20 feet. This will be less if the pump is offset from the well. 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 lowest level to which the water vdll drop while the pump is operating (pumping water level). To keep sediment from clogging the strainer, be sure it is five to ten feet above the bottom of the well. Before installing the foot valve, make sure that it works freely. When using a foot valve, a priming Figure 1, are recommended. tee and plug as shown The maximum lift of any pump decreases at the rate of about 1' less lift for every 1,000 feet of elevation above sea level. For example, at Denver, Colorado 0Elev. 5,000') the pump loses five feet of lift. The maximum depth from which it would pump water would therefore be 15 feet. Well Seal Plastic Pipe in Priming Plug, Priming Tee (User Supplied) From and Strainer Well ;11 1293 Dug or Cased Well Figure 2B PUMP/TANK INSTALLATION Pump Figure I NOTICE: Use Teflon tape supplied with the pump or PlastoJoint Stik' for making all pipe-thread connections to the pump itself. To avoid stress-crocking, do not use pipe joint compounds on the pump. When installed on a driven point well, your Shallow Well Water System should have a check valve installed as shown in Figure 2A. 1. Wrap male pipe threads being attached one or two layers of Teflon tape. Cover portion of pipe. [_eck Valve to pump with entire threaded 2. Do not overtighten threaded fittings in the plastic pump. Be sure you do not try to tighten joint past thread stop in pump port! 3. If leaks occur, remove fittings, clean offold tape, rewrap with two to three layers of tape and remake the connection. If joint still leaks, replace the fittings (fittings may be undersized). t Steel Drive Pipe 4. Be sure to support _Lake Chemical D,.__dve coupling Horizontal Well point Figure 2A _ Co., Chicago, all piping connected to the System. Illinois Piping from Well to Pump When the pump is offset more than 25 feet from the well, horizontal suction pipe size should be increased to reduce friction losses. Never install a suction pipe that is smaller than the suction tapping of the pump. Driven point 4 INSTALLATION 1-1/4" 1-1/2" 2" Up to 25 Ft. 25 to 50 Ft. 50 to 200 Ft. quired on new installations, pumps pumps that have been disassembled follows: 1. Open erate. Discharge 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. 1-1/4" 1-1/2" Up to 25 Ft. 25 to 1O0 Ft. 1O0 to 600 Ft. furthest from tank and allow pump 3. Open and close faucets air has been removed. repeatedly until you are sure all 4. If stream does not become steady, air may be leaking into the system; check for leaks in the piping on the suction side of the pump. NOTICE: To prevent waterlogging, check tank air charge annually. Tank To Check Tank Air Charge Tanks are pre-charged with 40 PSI air pressure at the factory. Your tank requires an air charge of 40 pounds per square inch (PSI) for proper operation; check tank pressure with tire gauge to determine ff air charge needs adjustment. Tank pre-charge shonld be checked annually; see instructions at right. If drawdown (amount of water available creases significantly, check as follows: 1 2 - air expands 2. Water begins to enter tank - air is compressed separator as it fills with water. 3. Pump-up Figure 3 cycle completed Filling area - air now compressed to 4. Use soap or liquid detergent to check for air leaks around air valve. Continuous bubbling indicates a leak. If necessary, install new core in air valve. This is the same as those used for automobile tubeless tires. 4 above cut off setting 4. Water forces 5. Separator begin. above to de- 3. If the air pressure is below 40 PSI, add air to the tank. Use an air compressor or a portable air storage tank. 3 Tank nearly empty vinyl separator. cycle) 2. At the air valve in top of tank, check air pressure with standard tire gauge. Air pressure should be the same as pump pressure switch cut-in setting (40 PSI). to flush all air out of the piping system and portion of the pre-charged tank. This is re- 1. per 1. To check air charge in tank, shut off electric power pump, open faucet near tank, and drain completely. In areas where the temperature is high for long periods of time, the tank pre-charge pressure may increase. This may reduce the tank drawdown (amount of water available per cycle). If this occurs, reduce the pre-charge pressure to two PSI below the pump cut-in setting of the pressure switch (normally to 38 PSD. It is necessary water reservoir to op- 2. Air in the system will cause a sputtering flow; allow faucets to run until you have a steady, air free stream. Pipe Sizes 1" faucets requiring repriming and for service. Do this as being water 5 of pressure switch. drawn from tank - compressed out of separator. completely empty - new cycle tank air ready to ELECTRICAL Disconnect Motor Switch power before working on pump, motor, pressure or wiring. Dial Type Voltage Selector 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 volt line. Remove Motor switch, Power Supply Connections End Cover Ground Wire Connection Figure 5 - Voltage Set To 230 Volts, Dial Type To change to I 15 volts: 1. Make sure power is off. 2. Turn the dial counter-clockwise dial window. Figure 4 - Removing Motor End Cover until 115 shows in the 3. Reinstall the Motor end cover 4. Go to Wiring Connections You v_tll need to remove the motor end cover to change the voltage setting. The illustration above also shows the pressure switch. If the power supply connection still needs to be made, the pressure svdtch cover wiU need to be removed. [ AWARNING_ Hazardous kill. Connect ground supply wires. Use the wire) specified in the the pump to a separate ances on it. Your motor terminal board (located under the motor end cover) should look like the one at right. ]AWARNIN_ Explosion supply line. WIRING below. voltage. Can shock, burn, or wire before connecting power wire size (including the ground wiring chart. If possible, connect branch circuit with no other applihazard. Do not ground to a gas CONNECTIONS LA WAR NINGI Fire hazard. Incorrect voltage can cause a fire or seriously damage the motor and voids the warranty. 0 The supply voltage must be within :t:10% of the motor nameplate voltage. 6 ELECTRICAL Connection 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. 1. Install, ground, wire, and maintain your pump in compliance with the National Electrical Code (NEC) or the Canadian Electrical Code (CEC), as applicable, and with all local codes and ordinances that apply. Consult your local building inspector for code information. 2. Connect the ground wire first as shown in Figure 4. The ground wire must be a solid copper v_tre at least as large as the power supply w'tres. There must be a solid metal connection between the pressure switch and the motor for motor grounding protection, ff the pressure switch is not connected to the motor, connect the green ground screw in the switch to the green ground screw tinder the motor end cover. Use a solid copper wire at least as large as the power supply wires. Motor wires connect here. -Power supply wires connect here. 230 Volt: Connect 2 hot wires (black and red) here and cap the white (neutral) wire. It does not matter which wire goes to whichscrew. 115 Volt: Connect one hotwire (black or red) to one of these screws (it doesn't matter whichone). Connect the white (neutral) wire to the other screw. Cap any remaining black or red wires. 3. Connect the ground wire to a grounded lead in a service panel, to a metal underground water pipe, to a metal well casing at least ten feet (3M) long, or to a ground electrode provided by the power company or the hydro authority. 4. Connect the power supply as shown in Figure 6. L;lampthe power cable to prevent strain on the terminal screws. - Connect the green (or bare copper) ground wire to the green ground screw. Procedure: wires to the pressure switch 31870398 Figure 6 - Pressure Switch Wiring Table II Wiring Chart - Recommended Wire and Fuse Sizes Distance in Feet from Motor to Meter Max. Load Branch Fuse* Volts Amps. Rating Amps 115/230 10.5/5.2 15/15 Motor Horsepower 1/2 0' to 100' 101' to 200' 201' to 300' 301' to 400' 401' to 500' _14 _12 Wire Sizt 1_14 1_14 _14 OPERATION Priming NOTICE: To properly prime the pump, install a pipe the discharge piping (see Figure 1, Page 4). To prevent damage to internal parts, pump has been filled with water. To prime From 10 to 20 foot depths, the pump and repeat steps the Pump tee in 5, do not start motor until pump: 1. Remove priming Page 4). plug (Purchase separately; 2. Fill pump 3. Replace priming plug, using stik 2 on plug threads; tighten 4. Start the pump. Water should be pumped ff not, repeat steps 1, 2 and 3. Figure tape 1, or Plasto-Jcdmt in 1-2 minutes. On shallow depths to water (10 feet or less), the pump will probably prime the first time after the following steps 1 through 4 above. priming pump several check the following: times, A. Be sure suction pipe is in the water. B. Be sure suction pipe does not leak. no water is C. Be sure that pump is not trying to llft water too high (see "Piping in the Well", Page 4). D. As long as foot valve and check valve function correctly and suction pipe does not develop leaks, pump should not need repriming in normal service. with water. Teflon plug. If, after pumped, you might have to shut off 1, 2 and 3 several times. z Lake Chemical Co., Chicago, Illinois MAINTENANCE Lubrication up. Flatten bag and force air out. 9. Tightly roll bag towards center opening. 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. 10. Before center opening is covered up, force air out of remaining portion of bag. Finish rolling bag. Draining 11. To make bag easier to insert of bag with talcum powder. for Winter &WARNING] before Risk of electric working shock. Disconnect power on unit. Pump should be drained whenever service or is in danger of freezing. 1. DISCONNECT POWER. from Open faucet proceeding. 3. Disconnect pressure switch tube (Key No. 17, Page 12) at barbed elbow on pressure switch (Key No. 28) and allow tube to drain. 5. 6. all pressure on system before 13. Reach into bag and push remove all wrinkles. (Key No. 22, Page 12) on pump to drain. plug to vent pump; disconnect 14) at tank end and drain pressure a point below the frost line. [_.WARNING ] Risk of electric shock. Disconnect power as follows: A. Open faucet B. Open body. draincock valve closest to tank. (Key No. 22, Page 12) on pump hose (Key No. 6, Page 14) from tank flange. (expel) ALL air pressure in system by removing core. 4. Disconnect outside piping from tank and pump. [_,WARNINGJ To avoid serious or fatal injury, be sure all air pressure has been released from tank before proceeding to step 5. 5. Remove nuts and washers from tank inlet flange (Key No. 2, Page 14). Tap inlet flange to break seal. Remove flange. 6. Wherever convenient, hold bag with pliers and cut with single-edge razor blade or sharp knife. Bag vdll not come out in one piece. Continue pulling and cutting until bag is removed. 7. Clean and dry inside of tank. 8. place replacement out sidewalls. bag on a clean surface with opening You need not ring on bag and lip on tank. of inlet flange and place on studs. nuts as follows: all nuts. one nut snug. C. Tighten opposite nut snug. D. Proceed, tightening opposite pairs to a snug fit. E. Recheck all nuts, using same pattern. are tight and you have a good seal. Be sure all nuts NOTICE: Do not overtighten; you may twist studs off of tank. If you have a torque wrench, tighten to 85 inchpounds torque. 18. Stand tank on feet and reconnect before working on unit. 1. DISCONNECT POWER TO PUMP. 2. Drain system surface Tighten B. Tighten hose tank [_,WARNING] Be sure AIJL air pressure has been released from tank before removing nuts from flange. Failure to do this may result in serious or fatal injury. Do not attempt to open tank unless all pressure has been relieved! C. Remove opening A. Hand tighten body Bag Removal 3. Relieve Clean center 17. NOTICE: Be sure to drain any piping that may be cut off from normal system drain due to check valve installation. Vinyl outside 15. Pull ring on bag through tank opening and fit over tank lip. BE SURE it seats properly in groove on tank lip. 16. Clean sealing Open draincock and allow pump Remove priming (Key No. 6, Page and all piping to sprinkle 12. Being careful not to break valve, stand tank on end. Push tightly rolled bag into tank. 14. 2. 4. and relieve it is disconnected into tank, 19. Recharge 20. tank to proper Reconnect hoses and pressure (see Page 6). Air Valve piping. air pressure switch (see Page 5). tube; prime pump Replacement 1. Follow steps 1 through 5 under "Vinyl Bag Removal". 2. Cut valve offas close totank as pos_lble. Push remaining portion back into tank. 3. Tip tank on end and BE SURE all water is drained from bag. 4. Carefully remove bag ring from lip on tank opening and push bag ring back into tank; reach in around it and remove cut off portion of valve from tank. 5. Wipe a thin film of soapy solution on replacement valve and from inside tank insert in hole in top of tank. 6. Pull valve through hole with pliers or a valve tool (available at your local filling station or Automotive Center). 7. Follow steps 14 through 20 under "Vinyl Bag Removal" to reinstall bag in tank. Testing 1. Follow for Bag Leakage steps 1 through 2. Tip tank on end, valve! 4 under valve down. "Vinyl Bag Removal". Be careful not to break 3. If bag leaks, water wll] run out of valve. If so, replace as instructed above. bag MAINTENANCE DISASSEMBLY AND ASSEMBLY OF PUMP AWARNING] Risk of electric disconnect power pump or motor. screwdrivers between the back purnp half and the motor flange. This will force rotating portion of seal off shaft. See Figure 7. shock. before Ground attempting any unit and work on 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 disturbed. 1. Disassemble pump A. Disconnect as follows: ) power. B. Drain pump by opening drain cock. Remove switch tubing from fitting on top of pump. [A WARNING ]To avoid pressure from system clamp from pump. serious injury, before attempting pressure release aH to remove 475 0194 C. Remove clamp, Key No. 10, Page 12. D. Remove pump base mounting bolts. Motor assembly and back half assembly of pump can be pulled away from front half. E. Remove 4. Place back haft of pump on flat surface ramic seat. See Figure 8. "O" rings. 2. Reassembly A. Clean Figure 7 of pump. "O" rings B. Lubricate grooves. and "O" ring grooves. "O" rings with petroleum C. Slide pump and tap out ce- halves jelly, and place in together. D. Clean inside of clamp. Place clamp around pump halves. Alternately tighten clamp screw and tap clamp around outside with plastic mallet. This will insure proper seating of "O" ring and clamp. E. Assemble base mounting bolts. Connect switch tubing and close drain cock. pressure F. Prime pump and tttm on power. G. Check for leaks. Removing Motor and Replacing for Service Shaft Seal If it is necessary to separate motor and seal plate, place the shaft seal. We suggest you purchase U109-6A, and have it on hand for future use. 479 0_94 always rethis item, Figure 8 5. Clean seal cavity. 6. Install new seal. NOTICE: The seal consists of two parts, a rotating member and a ceramic seat. The surfaces of the seal are easily damaged. Read instructions carefully. 1. Disassemble pump 2. Remove diffuser 9, Page 12). A. Remove B. Loosen motor. per instructions and impeller screws holding two screws C. Place 7/16" D. Turn impeller open A. Clean cloth. above. as follows (Key Nos. 8 and diffuser. and remove end wrench counterclockwise motor on motor when canopy from shaft flat. facing it. 3. Remove pump back half from motor by unscrewing four (4) nuts. Pry back half off motor by inserting two (2) 9 polished surface of ceramic seat with clean MAINTENANCE B. Wet outer edge of "O" Ring with detergent / HELPFUL solution. HINTS Cleaning Impeller 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 purposes. See Figure 9B. I. Follow steps 1A through 1E under Assembly of Pump" on Page 8. "Disassembly and 2. Remove diffuser and impeller from pump per instructions under "Removing Motor for Service and Replacing Shaft Seal" on Page 9. 3. Clean impeller and reassemble impeller and diffuser per instructions under "Removing Motor for Service and Replacing Shaft Seal" on Pages 9 and 10. Cleaning To remove D. Dispose seat. F. Reassemble debris from venturi or nozzle, as follows: 3. Flush out the debris by running water through the nozzle in the same direction as the dislodging tool was inserted. and clean surface of 4. Reinstall nozzle and venturi. Do not overtighten! 5. Reassemble pump per instructions on Page 9. back half of pump solution to motor. to inside diameter How to Handle a Gaseous Well of rotat- In some areas well water contains gases which must be allowed to escape before the water is used. This can be done as shown in Figure 11. H. Sfide rotating member on shaft until rubber drive ring hits shaft shoulder. NOTICE: BE SURE you do not chip or scratch seal face on shaft shoulder or seal v_Rl leak! A good way of delivering gas-free water is to suspend a pipe, closed at the bottom and open at the top, surrounding the suction pipe. Since the gases rise in the well casing, the water sucked down through the pipe and into the suction pipe is free of gas. This type of well must be vented to the outside of any enclosure. I. Screw impeller on shaft (clockwise) while holding shaft with 7/16" open end wrench on shaft flats. This will automatically locate seal in place. See Figure 10. _ase$ riseto surface wire to hold pipe sleeve Not 478 0194 to Figure proceed washer shaft. G. Apply detergent ing seal member. Jet Figure 9B of cardboard E. Clean motor Well 1. Disassemble pump per instructions on Page 9. 2. Turn venturi counterclockwise and remove it. The nozzle is now exposed. Remove it using a 5/8" hex socket wrench with extension. Turn counterclockwise. If socket wrench is not available, insert an ice pick or similar pointed tool carefully into the nozzle. This will dislodge debris. 483 0194 Figure 9A Shallow pip° valve Scale I0 2369 _396 sleeve J. Remount diffuser on seal plate. cap Figure 10 II TROUBLESHOOTING TROUBLE Motor will not run POSSIBLE CAUSES GUIDE REMEDIES 1. Disconnect switch is off 2. Fuse is blown 3. Starting switch is defective 4. Wires at motor are loose, disconnected, or wired incorrectly *5. Motor is wired incorrectry 6. Pressure switch contacts are dirty 1. 2. 3. 4. Motor runs hot and overload kicks off "1. Motor is wired incorrectly 2. Voltage is too low 1. Refer to instructions on wiring 2. Check with power company. Install heavier wiring if wire size is too small. See wiring instructions 3. See section below on too frequent cycling Motor runs but no water is delivered "1. Pump in a new instarlation did not pick up prime through: a. Improper pdming b. Air leaks c. Leaking foot valve *2. Pump has lost its prime through: a. Air leaks b. Water level below suction of pump 5. Refer to instructions on wiring 6. Clean by sliding piece of plain paper between contacts 3. Pump cycles too frequently (*Note: Check prime before booking for other causes. Unscrew priming plug and see if there is water in priming hole) 3. Jet or impeller is plugged 4. Check valve or foot valve is stuck in closed position 5. Pipes are frozen 1. Water level in well is lower than estimated 2. Steel piping (if used) is corroded or limed, causing excess friction 3. Offset piping is too small in size Pump pumps water but does not shut off 1. Pressure switch is out of adjustment or contacts are "frozen" 2. Faucets have been left open 3. Jet or impeller is clogged 4. Motor is wired incorrectly 5. Water level in well is lower than estimated 1. In new installation: a. Re-prime according to instructions b. Check all connections on suction line and jet c. Replace foot valve 2. In installation already in use: a. Check all connections on suction line, jet and shaft sea b. Lower suction line into water and re-prime. If receding water level in a shallow well operation exceeds suction lift, a deep well pump is needed 3. Clean jet or impeller according to instructions 4. Replace check valve or foot valve 5. Thaw pipes. Bury pipes below frost line. Heat pit or pump house 6. Raise foot valve and/or strainer above well bottom 6. Foot valve and/or strainer are buried in sand or mud Pump does not deliver water to full capacity (also check point 3 immediately above) Be sure switch is on Replace fuse Replace starting switch Refer to instructions on wiring 1. A deep well jet pump may be needed (over 20 ft. to water 2. Replace with Plastic Pipe where possible, otherwise with new steel pipe 3. Use larger offset piping 1. Adjust or replace pressure switch 2. Close faucets 3. Clean jet or impeller 4. Refer to instructions on wiring 5. Check possibility of using a deep well jet pump Pump cycles too frequently 1. 2. 3. 4. 5. Air spurts from faucets 1. Pump is picking up prime 2. Leak in suction side of pump 3. Well is gaseous 4. Intermittent over-pumping of well 1. 2. 3. 4. Leaks at the metal clamp 1. Loose clamps or "O" ring not sealed 1. First check the clamp tightening screw to see if it is tight. If it is tight and slight leakage still occurs, place a piece of wood on the periphery of the clamp and firmly tap the wood with a hammer. Repeat this operation around the edge of the clamp and retighten the clamp screw, rf leak continues, disassemble clamp and pump halves and check to see that "O" ring is properly seated and no foreign material is on "O" ring or "O" seat. Reassemble pump. Pipes leak Faucets or valves are open Foot valve leaks Pressure switch is out of adjustment Air charge too low in Captive Air_ Tank 1. Check connections, replace pipe fittings 2. Close faucets or valves 3. Replace foot valve 4. Adjust or replace pressure switch 5. Disconnect electrical power and open faucets until all pressure is relieved. Using automobile tire pressure gauge, check air pressure in tank at the valve stem located at top of tank. if less than 40 pounds, pump air into tank from outside source, until 40 pounds pressure is reached. Check air valve for Feaks,using soapy solution, and replace core if necessary I_,WARNING_ Release arl pressure in system before working on clamp! ]] As soon as pump picks up prime, all air will be ejected Check suction piping, make sure joints are not sucking aim Change installation as described in manual Lower foot valve if possible, otherwise restrict discharge side of pump REPAIR PARTS Pump Only- Model 390.2521 1 / 29 2 3O 3 4 5 8 28 9 10 24 11 16 17 \ 23 19 26 _25 2O 587 1193 22 12 \ 21 REPAIR PARTS Key No. Model 390.2521 1/2 HP Part Description 1_-_ - J218-953C Motor - 1/2 HP - 115/230V - 60 Cycle 2 17351 -OOO9 Water Slinger 3* Reducer Bushing - 1/2" x 1/8" NPT 4 WC78-41T Pipe Plug - 1/8" NPT 5 L176-47P Tank Body (Back Half) "O" Ring - Tank Body - 9-1/2"x 9" x 1/4" Shaft Seal 6 U9-399 7 U 109-6A 8 J105-4OPE 9 J1-39P Impeller Diffuser 10 C19-54SS Clamp - Tank Body 11 U9-201 12 N32P-66 "O" Ring - Venturi - 1-3/8" x 1-1/8" x 1/8" Venturi 13 N34P-19 Nozzle 14 N76-29P Insert 15 J20-18 Gasket 16 N 176-28PB Tank Body Assembly (Front Half - Includes Key No's. 11, 12, 13, 14, 15, 16, 19, 20, 21,23 and 24) 16 N76-28P 17 U37-673P Tank Body Only - Front Half Switch Tube 18 U111-212T 90 ° Hose Barb 19 U9-226 20 N166-5P "O" Ring - Check Valve - 2-1/4" x 2" x 1/8" Check Valve 22 U212-68T Pipe Plug - 1/8" NPT (2 Required) Draincock- 1/4" NPT 23 U30-742SS Screw - #10 - 16 x 1-1/8" (4 Required) 24 U30-542SS 25 C4-42P Screw - #8 - 32 x 7/8" (5 Required) Base 26* h Nut * 5/16"- 18 Hex Head (4 Required) 26A* b 27 C35-11 Lockwasher (4 Required) Motor Pad 28 2782 Pressure Switch 21" 29* 30 Locknut - 1/2" L43-5C Connector * Standard hardware item, may be purchased locally. ** For repair or service to motors, always give the motor model number. ]3 REPAIR PARTS Tank Only - Model 390.2521 6 REPAIR PARTS Key No. Model 390.262"1 1/2 HP Part Number 1 29135 Qty. Used 1 Description Tank Assembly (Includes Diaphragm, Elbow, Valve, Nuts, Washers, & Inlet Flange) U20-13 "1 2 6-i- Bag - Vinyl Air Valve w/Cap 1 U31-446P 1 Inlet Flange Nut - 5/16-18 Hex 6 3t 4 5 1 U74-37H 1 Hose - 1" x 24-1/2" U19-55SS 2 Clamp 2 Adapter - 1" NPT (Male) x 1" Insert • Not illustrated. i Standard hardware item, may be purchased locally. 14 15 SEARS OWNER'S MANUAL I:RRFTSMRN° PROFESSIONAL 1/2 HP SHALLOW WELL WATER SYSTEM Model No. 390.2521 For the repair or replacementpartsyou need Call7 am - 7 pm, 7 days a week 1-800-366-PART (1-800-386-7278) Forin-homemajor brandrepair service Call24 hoursa day,7 days a week t -8OO-4-REPAIR (1-800-473-7247) The model number of your Shallow Well Water Systemwill be found on the pump body When requesting service or ordering parts, always give the following information: • Product Type • Model Number • Part Number Forthe locationof a SearsRepairServiceCenterin yourarea Call24 hours a day, 7 days a week 1-800-488-1222 Forinformationon purchasinga Sears MaintenanceAgreementor to inquire aboutan existingAgreement call 9 am - 5 prn, Monday-Saturday 1-800-827-6655 SEARS • Part Description America's Repair S/_cialists Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.
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