Pentair Myers WG20 User Manual

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.
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.
Part # 13800A862 | © 2012 Pentair Pump Group, Inc. | 11/06/12

Pentair Myers WG20 Specifications

General

Model	WG20
Category	Water Pump
Manufacturer	Pentair Myers
Type	Submersible
Power Source	Electric
Phase	Single
Maximum Flow Rate	120 GPM
Construction	Cast Iron
Speed	3450 RPM
Discharge Size	2 in
Inlet Size	2 in
Outlet Size	2 in
Seal Type	Mechanical Seal
Voltage	230V

Summary

Model WG20 Duplex Grinder Pumps: Installation and Service Manual

System Introduction and Scope

Overview of the Model WG20 Duplex Grinder Pumps, covering installation and service aspects.

Rail System Installation in Basins

Steps for Fiberglass or Concrete Basin Installation

Detailed procedures for installing the rail system in various basin types.

California Proposition 65 Safety Warning

Important safety notice regarding chemicals in the product.

Basin Stability: Concrete Pouring Guidelines

Table specifying concrete volume needed per basin depth to prevent flotation.

Pump Assembly and System Startup

Assembling Pump Piping and Rail Guides

Instructions for connecting discharge piping and rail guides to the pump assembly.

System Startup Procedure

Steps for initiating system operation, including level control setup.

Troubleshooting Pump and System Issues

Guidance for diagnosing and resolving common operational problems.

Concrete Basin System Diagrams

Myers Duplex Lift-Out Rail System in Concrete Basin

Detailed diagrams showing system layout and dimensions for 36"/48" concrete basins.

Fiberglass Basin System Diagrams

Myers Duplex Lift-Out Rail System in Fiberglass Basin

Detailed diagrams showing system layout and dimensions for 36"/48" fiberglass basins.

Fiberglass Basin Component Details

System Components and Levels in Fiberglass Basin

Diagram illustrating key components, levels, and connections within a fiberglass basin.

Concrete Manhole System Diagram

Lift-Out Rail System in On-Site Concrete Manhole

Diagram showing the installation of the lift-out rail system in a concrete manhole.

Discharge Piping and Rail Guide Assembly

Steps for Assembling Pump Piping and Rail Guides

Detailed instructions for connecting discharge piping and rail guides to the pump.

Parts Identification and List

RWG & RWGX 125 Rail System Parts List

Comprehensive list of parts for the 2HP grinder pumps rail system.

Lift-Out Assembly Component Diagram

Diagram identifying specific parts of the lift-out assembly.

Electrical Wiring: ALC/FLC Controls

Box Connection for ALC Switch and FLC Alarm Controls

Wiring diagram for connecting ALC switches and FLC alarm controls to the system's box.

Electrical Wiring: FLCW 4 Ball Control

Connection Box for FLCW 4 Ball Control System

Wiring diagram for connecting the FLCW 4 ball control system to the connection box.

Standard Limited Warranty Information

Pentair Myers Product Warranty Terms and Conditions

Details warranty coverage, exclusions, and limitations for Pentair Myers products.

Company Contact and Support Details

Contact information for Pentair Myers for support and inquiries.