Page 15 of 30 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288 PR1 04/08/2014
Application Guide
2.5. STRAINERS
AERCO requires the installation of a Y strainer to keep dirt out of the system and boiler. The strainer
should be installed in the return piping with isolation valves to allow for cleaning as necessary. The Y
strainer shall have a 20 mesh or finer strainer. Such filter shall protect the boiler from heating system
dirt. It should be regularly cleaned to prevent problems.
2.6. ISOLATION VALVES
It is MANDATORY that ball or other type of shut-off valves be installed in the system supply and
return piping to isolate the boiler if necessary. In this case the boiler can be disconnected or drained
without having to drain the whole system.
WARNING!
NEVER bypass safety devices, such as safety valves and expansion
vessels.
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