TABLE OF CONTENTS
PAGE
OPERATING INSTRUCTIONS MANUAL
WARNING:
1. Each person involved in the assembly, installation and/or maintenance of the
Hydro-Guard Automatic Flushing Device must read this manual carefully and follow
all instructions prior to performing any installation or maintenance procedures
involving the Unit.
2. Verify the drainage path prior to installation to ensure that pedestrian and
vehicular hazards will not be created by the installation and use of the Hydro-
Guard Automatic Flushing Device (In areas in which freezing may occur, special
attention should be given to this procedure).
3. Never assemble, disassemble, or perform Hydro-Guard maintenance unless the
influent supply valve has been closed, verified and secured, and internal piping
pressure has been relieved.
4. Always use all necessary safety equipment and follow all recommended
procedures when installing, operating and maintaining the Hydro-Guard Automatic
Flushing Device.
5. Perform annual safety inspections and replace worn or defective parts.
6. Operate the Hydro-Guard Automatic Flushing Device only when fully installed and
correctly assembled.
CAUTION:
The recommended optimal operating pressure for a Hydro-Guard® Automatic Flushing
System is between 20psi and 120psi. In the event pressure may exceed 120psi it
is recommended that a Pressure Regulating Valve be installed ahead of the Hydro-
Guard flushing system.
Customer Service Center
Decatur, Illinois
800.798,3131
www.muellercompany.com/hydro-guard
HG-3 Automatic
Flushing System
Installation Instructions
2
Programming Unit
3
Assembly, Disassembly &
Maintenance Instructions
4
Troubleshooting
5
Parts 6
Options and Upgrades
7
F 12774 12/20
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