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MODEL WG20
DUPLEX GRINDER PUMPS
INSTALLATION AND SERVICE MANUAL
For Myers WG20 Duplex Grinder Pumps with Lift-Out Rail System Installed
in Fiberglass Basin at Factory as Complete System, or Rail Parts for Installing
in Fiberglass or Concrete Basin by Customer.
NOTE! To the installer: Please make sure you provide this manual to the owner of the equip ment or to the responsible
party who maintains the system.
Part # 13800A862 | © 2012 Pentair Pump Group, Inc. | 11/06/12
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Summary of Contents for Pentair Myers WG20
- Page 1 MODEL WG20 DUPLEX GRINDER PUMPS INSTALLATION AND SERVICE MANUAL For Myers WG20 Duplex Grinder Pumps with Lift-Out Rail System Installed in Fiberglass Basin at Factory as Complete System, or Rail Parts for Installing in Fiberglass or Concrete Basin by Customer.
- Page 2 NOTE – When complete packaged system, including 4. Cut holes through concrete wall or fiberglass basin fiberglass basin, is supplied from factory all parts are wall to locate discharge and support flanges. Pipes mounted in basin except pump and level controls. can be cemented into wall instead of using flanges Piping and guide plates for pumps are shipped in if desired.
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Page 3: Starting System
ASSEMBLING PIPING TO PUMP come on and operate until sump level drops to the Off position. Pump grinder plate and pump discharge piping is 4. Leave both pump switches to Off and fill sump supplied with other rail parts. until level is to override control, then turn both pump switches to Auto position. - Page 4 MYERS DUPLEX LIFT-OUT RAIL SYSTEM IN 36" OR 48" CONCRETE BASIN 36” BASIN 11-1/4 8-1/2 36” BASIN 11-3/4 48” BASIN 14-1/2 48” BASIN CENTER LINE OF CENTER LINE OF DISCH. RAIL SUPPORT FLANGES PIPE FLANGES USE SOFT RUBBER GASKET, SUPPLIED, BEHIND FLANGES HOLDING CLAMPS AND SUPPORT BRACKET FOR SHUT-OFF GUIDE PIPE...
- Page 5 MYERS DUPLEX LIFT-OUT RAIL SYSTEM IN 36" OR 48" FIBERGLASS BASIN 36” BASIN 36” BASIN 11-1/4 8-1/2 11-3/4 14-1/2 48” BASIN 48” BASIN CENTER LINE OF RAIL SUPPORT FLANGES CENTER LINE OF DISCH. PIPE FLANGES USE SOFT RUBBER GASKET, SUPPLIED, BEHIND FLANGES HOLDING CLAMPS AND SUPPORT BRACKET FOR SHUT-OFF GUIDE PIPE...
- Page 6 MYERS DUPLEX LIFT-OUT RAIL SYSTEM IN 36" OR 48" FIBERGLASS BASIN RED ALARM LIGHT PANEL SUPPORT, 2” PIPE CONTROL PANEL 2” CONDUIT REQ’D. 36” BASIN COVER W/HINGED HATCH & P’LOCK HASP. ” EPOXY COATED STEEL FLOOR PLATE JUNCTION BOX STRUCTURAL PLASTIC VALVE EXTENSION HANDLE SST FASTENERS FOAM SEAL TAPE...
- Page 7 LIFT-OUT RAIL SYSTEM INSTALLED IN ON-SITE CONCRETE MANHOLE RED ALARM LIGHT DUPLEX CONTROL PANEL NEMA 6 x6 PEDESTAL 48” BASIN COVER W/HINGED HATCH & P’LOCK HASP ” EPOXY COATED STEEL FLOOR PLATE VALVE EXTENSION HANDLE SPECIFY DISCHARGE DEPTH 12” 12” HOLD-DOWN PLATE ”...
- Page 8 ASSEMBLING DISCHARGE PIPING AND RAIL GUIDES TO PUMP RAIL SUPPORT YOKE PIPING SETS AT ANGLE TO PUMP AS SHOWN UPPER GUIDE PLATE UPPER HOLD-DOWN GUIDE 1/2” GALV. HOLD-DOWN PIPE 1” GALV. GUIDE RAILS LIFTING EYE CONDUIT BUSHING ” NIPPLE LOWER HOLD-DOWN GUIDE UPPER GUIDE PLATE 1”...
- Page 9 Lift-Out Assembly HOLD-DOWN BRACKET HOLD-DOWN BRACKET RWG & RWGX 125 RAIL SYSTEM PARTS LIST FOR 2HP GRINDER PUMPS Part Numbers HOLD-DOWN Hazardous BRACKET Ref. Standard Location Description Qty. RWG-125 RWGX-125 BOLT EYE, GALV. 21929A001 21929A001 5/16-18 x 7/8 EYE CLEVIS, CHAIN SHACKLE, GALV. 22417A001 22417A001 GUIDE, UPPER RAIL...
- Page 10 BOX CONNECTION, DUPLEX GRINDER SYSTEM ALC SWITCH AND FLC ALARM CONTROLS GRINDER #1 GRINDER #2 POWER CORD POWER CORD 14-4 OR 10-4** 14-4 OR 10-4** GRINDER #1 GRINDER #2 CONTROL CORD CONTROL CORD 18-5* 18-5* ALC-15 ALC-15 OVERRIDE CONTROL LEVEL CONTROL 16-3 16-3 BLACK...
- Page 11 CONNECTION BOX, DUPLEX GRINDER SYSTEM, FLCW 4 BALL CONTROL GRINDER #2 GRINDER #1 POWER CORD POWER CORD 14-4 OR 10-4** 14-4 OR 10-4** GRINDER #2 GRINDER #1 CONTROL CORD CONTROL CORD 18-5* 18-5* FLCW FLCW SECONDARY PRIMARY PUMP ON SWITCH PUMP ON SWITCH 16-2 16-2...
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Page 12: Standard Limited Warranty
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 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.
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