MODEL MRG20 - Pentair Water Literature
Contents
1. 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 12 132. gt PENTAIR MYERS MODEL MRGZU GRINDER PUMP INSTALLATION AND SERVICE MANUAL 2 HP Grinder Pump for Residential Applications 0 E NOTE 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 4 23833A665 O 2014 Pentair Ltd 02 07 14 USAGE The MRG20 is a submersible wastewater grinder pump designed specifically for individual residential applications The pumps are to be used for domestic sewage only and are not to be used for pumping commercial or industrial sewage such as motels schools apartments factories etc THIS PUMP IS NOT FOR USE IN HAZARDOUS LOCATIONS INSPECTING PUMP Before making any piping or electrical connections check the pump for shipping damage or cracks Using a flat screwdriver placed in the slot on the shaft end turn shaft and impellers to be sure they are free DO NOT TURN IMPELLER WITH FINGERS AS EDGES ARE SHARP POWER SUPPLY The MRG20 grinder pump should be connected only to a 230 volt single phase 60 Hz power source The pump will draw approximately 9 1 amperes at minimum flow and 15 0 full load amperes The pump must be connected to a grounded power socket DO NOT cut off the ground pin from the power cord plug POWER CORD A power cord is attached to the grinder pump via three insulated quick disconnect terminals The power cord should be replaced if it has been damaged in a
3. or P For any other symptoms contact a Myers authorized service facility Line circuit breaker may be off or fuse if used may be blown or loose Water level in sump may be too low Run in more water Pump cord plug may not be making contact in receptacle If pump is using the series cord plug the two plugs may not be plugged tight together Float may be stuck Be sure float operates freely in basin Check tether length of switch If all symptoms check OK motor winding may be open take to service center for repair Check valve may be installed backward Arrow on valve points in direction of flow Discharge shut off valve if used may be closed Pump may be air locked Start and stop several times by plugging and unplugging cord Check vent hole on pump case for plugging Pump head may be too high Horizontal distance does not affect pumping except loss due to friction Inlet holes in pump base may be clogged Remove pump and clean out openings Impeller or volute openings may be plugged or partially plugged Remove pump and clean Check tether length of switch Float is stuck in up position Be sure float operates freely in basin Pump impeller may be partially clogged causing motor to run slow resulting in motor overload Fuse size or circuit breaker is too small Must be 20 amps Defective motor stator Return to Myers servic
4. 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 c 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 g to any unit that has been repaired or altered by anyone other than 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
5. 2412 RUN START WHITE CAPACITOR CAPACITOR Ca Ca RED 2 ey BLUE 370v 324 pe 389 uF 29 BROWN YELLOW ORANGE PHASE box which must be connected to follow all local electrical safety codes and ordinances as well as most recent National Electric Code NEC ANSI NFPA CALIFORNIA PROPOSITION 65 WARNING A WARNING This product and related accessories contain chemicals known to the State of California to cause cancer birth defects or other reproductive harm DISMANTLING PUMP FOR REPLACEMENT PARTS Before dismantling pump for replacement parts clean pump thoroughly WIRING DIAGRAM MARATHON BLACK SCREW ON MOTOR END BELL LINE 2 WHITE aiia DO S GROUND GREEN LINE 1 BLACK ie bl o J INSULATED TERMINALS NON INSULATED TERMINALS TROUBLESHOOTING GUIDE Pump does not run or hum See A D E or F Pump runs but does not deliver water See G I J Kor L Pump runs and pumps out sump but does not stop See M Pump runs but delivers only small amount of water See J Lor N Fuse blows or circuit breaker trips when pump starts See O or P Motor runs for short time then stops Then after short period starts again Indicates tripping overload caused by symptom shown See K L N
6. LUTE 21584B000 FLANGE W SHREDDING RING SCREW CAP 1 4 x 1 LONG SST 3 REQ D 21583B000 RETAINER IMPELLER SST 05013A039 3 4 5 07597A018 SCREW FLAT HEAD 1 4 x 3 4 LONG NO 6 171904004 CLAMP O 7 215828000 IMPELLER GRINDING 8 SCREW SET 1 4 x 3 8 LONG 2 REQ D 26434C010 co IMPELLER PUMP PLASTIC MG200 26434C000 IMPELLER CAST IRON OPTIONAL MG200 i o 26430D001 PLATE SEAL BEARING A um 05014A181 GASKET TETRASEAL 7 x 6 3 4 x 1 8 E N 145890021 HOUSING MOTOR E 19100 012 SCREW CAP 5 16 x 1 1 4 LONG 8 REQ D E gt 21576A010 SEAL 7 8 SHAFT EN 08565 018 BEARING LOWER E N A N A STATOR W SHELL 2 HP 230V 1 PH ROTOR W SHAFT 24481A008 SWITCH MECHANICAL 121414015 CAPACITOR START WITH RESISTOR 20333A001 08565A013 CLIP CAPACITOR BEARING UPPER 12558A030 RING RETAINING 19331A005 WASHER SPRING FINGER 05022A009 PLUG PIPE 1 4 NPT 05030A235 WASHER SST 3 32 THICK 05014A193 GASKET RUBBER 05030A234 WASHER SST 1 32 THICK 253414002 NUT SOLID 25338B001 CORD POWER 20333A004 CLIP CAPACITOR 238384010 CAPACITOR RUN WITH RESISTOR N 145950201 SWITCH FLOAT S Ww 25371B006K_ HANDLE e
7. e center MOTOR END PARTS COMMON PARTS LIST For use with product built with AO Smith motor Ref No _Part No 26433D002 CASE VOLUTE 215848000 FLANGE W SHREDDING RING 19099A012 SCREW CAP 1 4 x 1 LONG SST 3 REQ D 21583B000 RETAINER IMPELLER SST 07597A018 SCREW FLAT HEAD 1 4 x 3 4 LONG 25371B006 HANDLE 21582B000 IMPELLER GRINDING 05013A039 SCREW SET 1 4 x 3 8 LONG 2 REQ D 26434C010 IMPELLER PUMP PLASTIC 26434C000 IMPELLER CAST IRON OPTIONAL 26430D001 PLATE SEAL BEARING 05014A181 GASKET TETRASEAL 7 x 6 3 4 x 1 8 145890022 HOUSING MOTOR 19100A012 SCREW CAP 5 16 x 1 1 4 LONG 8 REQ D 21576A010 SEAL 7 8 SHAFT 27739D000 MOTOR 2 HP 230V 1 PH 05022A092 PLUG PIPE 1 4 NPT 05030A235 WASHER SST 3 32 THICK 050144193 GASKET RUBBER 05030A234 WASHER SST 1 32 THICK 253414002 NUT SOLID 25338B001 CORD POWER 145950201 SWITCH FLOAT 152240021 RUN CAPACITOR 12141A018 START CAPACITOR ow MOTOR END PARTS COMMON PARTS LIST For use with product built with 28 2 26 25 24 20 23 21 22 16 17 15 14 12 co Marathon motor Ref Part Number Description 190994012 264330002 CASE VO
8. l ps V Entire motor can be replaced with 27739D000 4 5 3 2 THIS PAGE INTENTIONALLY LEFT BLANK 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 or 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 improvement 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 All 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
9. lug voltage and pump voltage must match 1 Follow steps 1 through 4 of Mounting the Switch 2 Insert switch s piggyback plug into outlet 3 Plug pump into piggyback plug 4 Check installation Allow system to cycle to ensure proper operation Direct Wire Install 1 Follow steps 1 through 4 of Mounting the Switch 2 Further wiring of switch should be done by qualified professionals only 3 Check installation Allow system to cycle to ensure proper operation liquid tight connector 4 WARNING In 230 VAC pump installations one side of the line going to the pump is always HOT This condition exists if the switch is on or off Install double pole disconnect on all 230 VAC pump circuits SAFETY WARNINGS 4 WARNING Risk of electrical shock Pumps are supplied with a grounding conductor and grounding type attachment plug on the power cord To reduce the risk of electrical shock be certain that it is connected only to properly grounded grounding type receptacle DO NOT cut off ground pin or use an adapter fitting DO NOT use an extension cord with this pump When wiring this pump follow all local electrical safety codes and ordinances as well as most recent National Electric Code NEC ANSI NFPA The MRG20 grinder pumps have a GROUND WIRE that is connected to a screw in the metal motor housing This wire goes to the receptacle or control WIRING SCHEMATIC AO SMITH PROTECTOR SENSATA TECHNOLOGIES TYPE 15HM
10. ny way or the cord jacket has become brittle MOTOR TYPE The MRG20 grinder pump contains a 3 4 frame 2 HP single phase 60 Hz 3450 RPM capacitor start capacitor run motor with Class F insulation and built in on winding overload protection Motor has upper and lower ball bearings and is oil cooled and lubricated 4 CAUTION THE MRG20 GRINDER PUMP SHOULD NEVER BE WORKED ON WITHOUT FIRST DISCONNECTING THE POWER CORD OIL TYPE The motor housing contains dielectric transformer oil to provide good heat transfer and lubrication of ball bearings no other lubrication is required Oil level may be checked by removing the nut and washers from the top of the motor housing The oil level should be 3 7 8 from the boss with pump setting vertically Do not overfill with oil Only dielectric transformer oil obtained from a Myers authorized Service center should be used PUMP SWITCH INSTALLATION INSTRUCTIONS Mounting the Switch 1 Determine pumping range for installation Do not tether less than 3 1 2 from pipe 2 Tighten strap around discharge pipe keeping switch cable between strap and pipe to prevent slippage 3 Space small ties at least 1 apart To readjust ties press small tie tabs down 4 To lock releasable tab run remaining strap between tab and head Tuck strap back through head Piggyback Plug Install Electrical outlet must not be located in pump chamber Electrical outlet voltage piggyback p
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