MODELS WG/WGX20* - Pentair Water Literature
Contents
1. Cap Screw Hex 1 4 20 x1 Lg 13800 764 02 08 13 aa WG20 GRINDER PUMP PARTS LIST FOR PUMPS MANUFACTURED PRIOR TO 1982 ORIGINAL DESIGN Note Has a 4 wire control cable and 4 wire power cable and uses Tetraseals square rings at the inside corners between castings OOOO E AAAG 13800A764 02 08 13 WG20 GRINDER PUMP PARTS LIST FOR PUMPS MANUFACTURED PRIOR TO 1982 ORIGINAL DESIGN Note Has a 4 wire control cable and 4 wire power cable and uses Tetraseals square rings at the inside corners between castings Description Cord Cap Complete 22407C10 Description Bearing Ball 8565A18 Connector For 230 1 and 200 460 575 12672A1 Gasket Tetraseal 5 3 4 x 5 1 2 x 1 8 5014A171 amp Connector 230V 3PH 4 and 460V 3PH 3 Req Housing Upper Seal 21574D 21591A1 Seal 7 8 Shaft Upper 21576A Pipe Plug 1 4 NPT Hex HD 5022A54 Ring Retaining 12558A6 Cap Screw Hex HD 5 16 18 x 1 1 4 Lg 19100412 Seal 3 4 Shaft Lower 21579A Gasket Tetraseal 4 1 8 x 3 7 8 x 1 8 Cap Screw Socket Hd 5 16 18 x 1 Lg 6106A8 5014A169 Cap Upper Bearing 21570B Gasket Tetraseal 4 5 8 x 4 3 8 x 1 8 Mach Screw Socket Flat Hd 5 16 18 x 1 Lg 7597 17 5014A170 Tube Plastic 1 1 4 Lg2. Gasket Vellumoid 5231A76 10649A102 Mach Screw 10 24 x 1 2 Lg Lockwasher 10 Housing Lower Seal 21578C 5434A34 Case Volute 21580D 6107A15 Washer Finger Spring 19331 5 Bearing Ball Impeller Pump Impeller Grinder 21581C 21582B 8565A13 Ring Retaining Flange with Shredding Ring 21584B 11816A6 Rotor with Shaft Set Screw 1 4 20 x 3 8 5013A39 See Chart Below Shaft Only Mach Screw Socket Flat 1 4 20 x 3 4 Lg 7597 18 21572C10C Housing with Stator Ferrule Rubber 12619A1 See Chart Below Retainer Impeller 21583A Stator Only Cap Screw Hex HD 1 4 20 x 1 Lg 19099412 See Chart Below Plug Special 21577 Motor Housing Ref No 14 Pump Cat No Rotor with Shaft 215720 215710 Rotor Only 2157262008 Electrode with Wire Ref No 15 Housing with Stator 21571D20K 21792A Stator Only 21573C 21572 1 2157202018 21571025 21573 1 21572 1 2157202018 21571031 2157302 2157201 2157202018 21571031 2157302 2157201 21572C201B 21571D35K 2157303 13800 764 02 08 13 CHECK LIST TO DETERMINE MOTOR TROUBLE Checking For Moisture in Motor Use ohmmeter and set on highest scale Readings on the large power cord between any of the conductors red black whit
3. Grinder assembly may be partially clogged with some foreign objects causing noise and overload on the motor Grinder impeller may be rubbing on grinder ring due to bent shaft or misalignment Grease and solids have accumulated around pump and will not pump out of basin Water shut off level may be set too high or volume of pumping cycle may be too great allowing solids to settle out of suspension Set pump shut off level at the pumps widest part where volute case mates with seal chamber to 1 below Set water level control float or weight to following approx levels 2 ft dia basin 12 14 3 ft dia basin 6 8 4 ft dia basin 6 7 above pump shut off Run pump on hand operation for several minutes with small amount of water running into basin to clean out solids and grease This allows pump to break suction and surge which will break up the solids If level switch lower weight or float is set properly this condition generally will not occur Where all type switches are installed trash may have accumulated around lower weight causing pump to turn off too soon Clean trash from weight and suspension cable 9 13800 764 02 08 13 MOTOR WIRING DIAGRAMS NOTE Probe test resistor is used on WGX20 UL Hazardous Location only CONTROL CORD HEAT SENSOR ON STATOR ELECTRODE PROBE TEST RESISTOR ON HAZARDOUS LOCATION ONLY 230 SINGLE PHASE CONTROL CORD SCRE
4. gt PENTAIR MYERS rm Je NX TT a Myers E J9t C d UJ 1 J J e IB MODELS WG WGX20 Used in Hazardous Locations Class Division 1 Groups C amp D G NOT RINDER PUMP INSTALLATION AND SERVICE MANUAL lt gt APPROVED E To the installer Please make sure you provide this manual to the owner of the equipment or to the responsible party who maintains the system Part 138004764 2013 Pentair Ltd 02 08 13 Thank you for purchasing your Myers Pump help ensure years of trouble free operation please read the following manual carefully CAUTION READ THESE SAFETY WARNINGS FIRST BEFORE INSTALLATION SERVICING OR OPERATING ANY PUMP THESE INSTRUCTIONS ARE WRITTEN WITH THE UNDERSTANDING THAT THE INDIVIDUALS HAVE EXPERIENCE IN BUILDING WET WELLS AND INSTALLING BASINS GRINDER PUMPS AND PUMPING EQUIPMENT NOTE Models with Third Party approval s are clearly marked on individual pump nameplates Hazardous Location Service WGX20 pumps are to be used for handling sewage wastewater and storm water only DO NOT use in other hazardous locations These motors must be repaired and serviced only at Myers Authorized Service Centers or at the Myers Factory Any unauthorized field repair voids the warranty the hazardous location r
5. W GROUND HEAT SENSOR ON STATOR ELECTRODE STATOR PROBE TEST RESISTOR ON HAZARDOUS LOCATION ONLY 230 VOLT THREE PHASE 13800 764 02 08 13 10 CONTROL CORD CORD POWER HEAT SENSOR ON STATOR R ELECTRODE TEST RESISTOR ON HAZARDOUS LOCATION ONLY 200 OR 575 VOLT THREE PHASE CONTROL CORD OWER CORD P HEAT SENSOR ON STATOR STATOR PROBE TEST RESISTOR ON HAZARDOUS LOCATION ONLY 460 VOLT THREE PHASE DIMENSIONS 2 5 7 7 200 mm W 4 1 2 114 mm 245 mm 1 1 2 NPT 19 1 32 483 11 13800A764 02 08 13 STANDARD LIMITED WARRANTY Pentair Myers warrants its products against defects in material and workmanship for a period of 12 months from the date of shipment from Pentair Myers 18 months from the manufacturing date whichever occurs first provided that such products are used in compliance with the requirements of the Pentair Myers catalog and technical manuals for use in pumping raw sewage municipal wastewater or similar abrasive free noncorrosive liquids During the warranty period and subject to the conditions set forth Pentair Myers at its discretion will repair or replace to the original user the parts that prove defective in materials and workmanship Pentair Myers reserves the right to change or improve its products or any portions thereof without being obligated to provide such a change or im
6. arm buzzer or flashing red light comes on due to high water level in basin Push in red reset button to reset overload If overload trips again after short run pump has some damage and must be removed from basin for checking Trouble may be from clogged grinder causing motor to overload or could be from failed motor Trouble may be from faulty component in control box Always check control box before removing pump Yellow run light stays on continuously 1 Indicates H O A switch be in the hand position Level control switch may have failed causing pump to continue to operate when water is below lower float Grinder assembly may be partially clogged causing pump to operate at very reduced capacity Check valve may be clogged causing low pump flow Gate valve or street valve may be in off position Pump may be air locked Circuit breaker trips Reset breaker by pushing clear down on handle then back to ON position If breaker trips again in few seconds it indicates excessive load probably caused by a short in the motor or control box Check out instructions given with control box before pulling pump If this condition happens after an electrical storm motor or control box may be damaged by lightning Resistance reading of the motor with lead wires disconnected from the control box can determine if trouble is in motor or control box Pump is noisy and pump rate is low
7. ating and Factory Mutual approval SAFETY WARNINGS DANGER Risk of Electrical Shock or Electrocution May result in serious injury or death or fire hazard Installer must disconnect all electrical sources prior to installation handling or servicing Only qualified personnel may install this system NFPA 70 National Electric Code NEC or local codes must be followed System must be properly grounded according to NEC Do not lift pump by power cord DANGER Biohazard Risk Once wastewater source has been connected to system biohazard risk exists Installer s and or service personnel must use proper personal protective equipment and follow handling procedures per OSHA 29 CFR 1910 1030 when handling equipment after wastewater source has been connected to system DANGER Risk of Asphyxiation Installer s and or service personnel must use proper personal protective equipment and follow OSHA 29 CFR 1910 146 or OSHA 29 CFR 1926 Pump may be installed in a location classified as a confined space DANGER Risk of Fire or Explosion Do not smoke or use open flames in or around this system WG20 systems are not intended for use in hazardous locations per NFPA 70 National Electric Code Do not pump flammable liquids DANGER Cutting Risk Risk of serious cutting or amputation exists Disconnect all power sources prior to servicing pump or grinding mechanism 13800 764 02 08 13 Pump may start without warning Grinding mechan
8. ck for proper rotation CAUTION KEEP HANDS COMPLETELY AWAY FROM GRINDER IMPELLER WHEN MAKING THIS CHECK Where pump is installed remote from control box in outside installation a different method is used Set the pump in the basin and run in some water So pump can operate Turn H O A switch to hand position and let pump pull water down in basin When water reaches the bottom of pump rotation of the water can be observed Water should rotate in a clockwise direction if pump rotation is correct If not correct rotation interchange any two line leads to motor at control panel When replacing a pump with a new unit rotation must be checked WG WGX20 PUMP PARTS LIST 2 ANZA ZI N e SQ ES LLL y J iC 2 lt S E X I 5 2 ANY 99696 OO 9 KNNNANIANAAAANN S Roxy 4 2 DNAS jw A 4 4 5 Pte Zx x 555 27 SR NIN aA Na NS 12777777 NNNNNNNNNNNNNN 552 ANSSSSSSSSSSSSSS ON Z gt x X amp OX 9 j 2 N amit Yk e me Ref No Part No Descri
9. e to green conductor or motor shell should be more than 500 000 ohms Both motor housing and stator must be replaced as a unit as stator is pressed in at the factory and cannot be removed in the field Resistance of Windings Every motor winding has a fixed resistance and winding must check close to the specification values This winding resistance also determines if motor is connected for voltage being used Use ohmmeter for this test and set on scale to read directly in ohms Winding Resistance Values in Ohms Marathon Black To Black To White Red Main Start White to Motor Type amp Voltage Winding Winding Red Single Phase 208V 1 2 4 87 6 07 Single Phase 230V 1 54 7 60 9 14 Three Phase 200V 2 79 2 79 2 79 Three Phase 230V 3 29 3 29 3 29 Three Phase 460V 13 15 13 15 13 15 Three Phase 575V 19 68 19 68 19 68 TROUBLE CHECK LIST Troubles listed below are generally not caused by the pump Other trouble can occur from faulty control box operation These will be listed with the control box instructions CONDITION PROBABLE CAUSE Pump runs but does not 1 pump liquid from basin Pump impeller may be air locked this occasionally occurs on a new installation Remove pump and clean volute case weep hole and reinstall pump allowing 2 to 3 minutes for air to weep from pump 2 Remove pump and guides from wet well and test in 5 gallon bucket after checking weep hole agai
10. his type circuitry The float level controls maintain the basin sewage water level by controlling pump turn on and turn off level 1 The lower turn off control should be set so that the pump stops at approximately the top of the pump 2 The upper turn on control should be set above the lower turn off control The exact height between the two controls is determined by the number of pump starts desired and the depth of the basin A maximum of 10 starts per hour should not be exceeded 3 The override control is set at a specified height above the upper turn on control 4 The alarm control is set about 6 to 12 above the override control 5 No control should be set above the inlet invert JUNCTION BOXES If a junction box is used in a hazardous location it must be a hazardous location approved type with hazardous location cord connectors Wires from the junction box must pass through a hazardous location seal connector AIR VENTING Air tends to trap in the pump volute when water raises in the sump or when the pump is lowered into water after service To vent off this air a small hole is drilled into the pump volute Be sure this vent hole is clean after any service work on pump PUMP MODELS The WG20 and WGX20 models are offered in 208 and 230 volt single phase and 208 230 460 and 575 three phase They are offered in 50 and 60 Hz configurations INSTRUCTIONS Instructions cover only the pump unit Separate instructi
11. ism is extremely sharp Use caution when handling grinder mechanism DO NOT modify the cord strain relief When wiring to a system control connect the pump ground lead to the system ground DO NOT run the pump dry Dry running can overheat the pump causing burns to anyone handling it and will void the warranty The pump normally runs hot To avoid burns allow it to cool for 30 minutes after shutdown before handling it Submersible grinder pumps are not approved for use in swimming pools recreational water installations decorative fountains or any installation where human contact with the pumped fluid is common This specialized pump is designed to incorporate a grinding mechanism to remove wastewater particulate and pump the resulting slurry from a residential structure to a collection system ON THREE PHASE PUMPS ONLY MOTOR PROTECTION MUST BE PROVIDED BY THE INSTALLER ALL THREE PHASE PUMPS MUST BE INSTALLED WITH MAGNETIC STARTERS HAVING THREE LEG OVERLOAD PROTECTION IN ACCORDANCE WITH THE NATIONAL ELECTRIC CODE FOR INSTALLATIONS WITH MORE THAN ONE PUMP EACH PUMP MOTOR MUST HAVE SEPARATE OVERLOAD PROTECTION PUMPS WITH SEAL LEAK DETECTORS MUST BE CONNECTED TO THE PROPER CONTROL CIRCUITRY Examine all lifting devices rope or chain for damage before and after each lift DO NOT exceed manufacturers recommendation for maximum performance as this could cause the motor to overheat Secure the pump in its operating
12. n If pump still does not pump disassemble check valve and check to insure that check valve flapper has not adhered to sealing face This condition results from assembled basin units setting in the sun before installation NOTE Check valve bolts should have Loctite 242 or equivalent applied before reassembly of check valves 3 If pump will pump water from bucket try in wet well again If it still will not pump the following problems may exist a Ball Valve Gate Valve may be in off position b Discharge piping obstructed c Valve at street or in main line may be off redundant check valve in backwards d at force main obstructed hole not drilled through enough pipes pushed into tee too far 4 If pump has been installed for some time an does not pump it may be clogged at grinder inlet 5 Discharge head may be too high Check elevation Maximum pump head at zero flow is 105 feet 6 If above checks do not locate trouble motor rotor may be loose on shaft which allows motor to run but will not turn impeller or only at low RPM 13800A764 02 08 13 CONDITION PROBABLE CAUSE Red light comes on at control box This indicates some water has leaked past the lower seal and has entered the seal chamber and made contact with the electrode probe Pump must be removed from basin immediately for replacement of lower seal This preventative repair will save an expensive motor Overload trips and al
13. n Pentair Myers or an authorized Pentair Myers service provider h to any unit that has been repaired using non factory specified OEM parts Warranty Exclusions PENTAIR MYERS MAKES NO EXPRESS OR IMPLIED WARRANTIES THAT EXTEND BEYOND THE DESCRIPTION ON THE FACE HEREOF PENTAIR MYERS SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ANY PARTICULAR PURPOSE Liability Limitation IN NO EVENT SHALL PENTAIR MYERS BE LIABLE OR RESPONSIBLE FOR CONSEQUENTIAL INCIDENTAL OR SPECIAL DAMAGES RESULTING FROM OR RELATED IN ANY MANNER TO ANY PENTAIR MYERS PRODUCT OR PARTS THEREOF PERSONAL INJURY AND OR PROPERTY DAMAGE MAY RESULT FROM IMPROPER INSTALLATION PENTAIR MYERS DISCLAIMS ALL LIABILITY INCLUDING LIABILITY UNDER THIS WARRANTY FOR IMPROPER INSTALLATION PENTAIR MYERS RECOMMENDS INSTALLATION BY PROFESSIONALS Some states do not permit some or all of the above warranty limitations or the exclusion or limitation of incidental or consequential damages and therefore such limitations may not apply to you No warranties or representations at any time made by any representatives of Pentair Myers shall vary or expand the provision hereof gt PENTAIR MYERS 1101 MYERS PARKWAY 490 PINEBUSH ROAD UNIT 4 ASHLAND OHIO USA 44805 CAMBRIDGE ONTARIO CANADA N1T 0A5 419 289 1144 800 363 PUMP WWW FEMYERS COM Warranty Rev 12 13
14. nnects to control box terminal strip black common white run and red start The green wire is always ground and connects to ground terminal in control box For three phase the same 4 conductor color coded cords are used the black white and red can be connected to any of the three phase terminals in the control box The smaller control cord uses black and white leads for heat sensor and connects to terminal strip in control box The red and orange wires connect to seal failure terminals in control box and the green or ground lead connects to ground terminal in control box 13800 764 02 08 13 CAUTION After pump is installed NEVER WORK ON MOTOR OR GRINDER UNIT WITHOUT DISCONNECTING MOTOR LEAD WIRES FROM CONTROL PANEL DO NOT RELY ON OPENING CIRCUIT BREAKER ONLY INSTALLING PUMP IN BASIN Complete installation and piping instructions are included with the basin package THREE PHASE When pump is installed to operate on three phase power pump rotation must be checked For inside installation where control box is near the sump basin pump can be laid on side to check rotation before installing in sump To check rotation turn Hand Off Auto switch to OFF position and turn on circuit breaker Quickly turn H O A switch to HAND position then OFF Note grinder impeller rotation Impeller must rotate 13800 764 02 08 13 counterclockwise If rotation is wrong change any two line leads to motor at control box terminal Reche
15. ons for the electrical control panel and basin packaged system are included with these items CAUTION PUMP IS ONLY TO BE DISASSEMBLED AT MYERS FACTORY OR AN AUTHORIZED MYERS SERVICE FACILITY DESCRIPTION OF PUMP This pump is intended to grind and pump all normal sewage for home or commercial use Pump is of heavy duty construction and submersible type for long life when pumping ground sewage Motor is capacitor start capacitor run for single phase Capacitors and start relay are mounted in electrical control box Pump has two oil filled chambers 1 the motor and ball bearings and 2 the seal chamber for long life and best heat transfer The lower seal above the pump impeller acts as a buffer for upper seal that holds oil in the motor chamber If lower seal leaks for any reason water enters the seal chamber If motor has the seal leak detector the electrode will contact the water and close the circuit to the red seal light in the control panel indicting motor must be serviced before upper seal fails A heat sensor is attached to stator winding to sense any abnormal heat If motor temperature for any cause rises above 221 the pump is immediately stopped and will not restart until motor cools to a safe temperature PUMP CORDS Each pump has two cords The power cord contains 4 conductors and the control cord has 5 conductors The power cord for single phase uses the color coding for start and main windings and co
16. position so it cannot tip over fall or slide DO NOT pump without safety devices in place For hazardous locations use pumps that are listed and classified for such locations Basin must be vented in accordance with the local plumbing codes CALIFORNIA PROPOSITION 65 WARNING WARNING This product and related accessories contain chemicals known to the State of California to cause cancer birth defects or other reproductive harm IMPORTANT Myers is not responsible for losses injury or death resulting from failure to observe these safety precautions misuse or abuse of pumps or equipment CONTROL PANELS All Myers control panels used on these grinders are UL listed and CSA certified Control panels mounted directly to the basin used outdoors are UL listed and CSA certified waterproof If intrinsically safe controls used in hazardous locations are required Myers can furnish a UL listed or CSA certified panel Note Myers built control panels supply the correct circuitry for moisture and heat sensor connections Failure to install the correct circuitry with proper connection would negate warranty and Factory Mutual Approval LEVEL SENSING CONTROLS Intrinsically safe type float controls are recommended for all applications and required for hazardous location service An intrinsically safe control panel relay will limit the current and voltage to the level controls A Myers control panel can be supplied with t
17. provement for prior sold and or shipped units Start up reports and electrical schematics may be required to support warranty claims Submit at the time of start up through the Pentair Myers website http forms pentairliterature com startupform startupform asp type m Warranty is effective only if Pentair Myers authorized control panels are used seal fail and heat sensing devices must be hooked up functional and monitored or this warranty will be void Pentair Myers will cover only the lower seal and labor thereof for all dual seal pumps Under no circumstance will Pentair Myers be responsible for the cost of field labor travel expenses rented equipment removal reinstallation costs or freight expenses to and from the factory or an authorized Pentair Myers service facility This limited warranty will not apply to defects or malfunctions resulting from failure to properly install operate or maintain the unit in accordance with the printed instructions provided b to failures resulting from abuse accident or negligence to normal maintenance services and parts used in connection with such service d to units that are not installed in accordance with applicable local codes ordinances and good trade practices e if the unit is moved from its original installation location f if unit is used for purposes other than for what it is designed and manufactured 9 to any unit that has been repaired or altered by anyone other tha
18. ption Qty 1 224076102 19100 033 Screw 5 16 18 x1 Lg 12672 001 21570B100X 10649A102 Plastic 19100A012 Cap Screw 5 16 18 x1 1 4 Lg 05876A122 Gasket Rubber Tetraseal Cap Upper Bearing 05876A123 Gasket Rubber Tetraseal 9 05022A092 10 05434A043 Mach 10 24 x1 2 Lg 11 06107A015 Lock Washer 10 2 1 07597A017 Pipe Plug 1 4 NPT Hex HD Screw Mach Flat Hd 21571D100X 05013A039 19331A005 08565A013 Housing Motor Set Screw 1 4 20 x3 8 Lg Washer Spring Bearing Ball 11816A006 Ring Retaining 21572C100 Rotor w Shaft 10 21572C101 21573C104 Rotor w Shaft Stator 208 19 21573C100 21573C102 21573C103 2 2 12558A006 Retaining 2 22578A003 0 1 2 5 4 Stator 230 19 Stator 208 230 460 30 Stator 575 30 Electrode 05876A125 22579A000 Gasket Rubber Tetraseal Ferrule Rubber 21577A000 21578C100X Plug Special Housing Lower Seal 22581A001 Gasket Vellumoid 21580D102P 21581C210 215810214 32 215828000 Impeller Grinding 3 07597A018 Mach Screw 1 4 20 x1 Lg 3 34 21583A000 35 21584B000 Casing Volute Pump Impeller WG20 WGX20 Pump Impeller F Series Only Retainer Impeller Flange w Shredding Ring WG20 X 21584B004 Flange w Shredding Ring F Series Only 19099A012
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