Xylem SI-27W-C User Manual

McDonnell & Miller No. 27W
Float and Valve Mechanism

The McDonnell & Miller No. 27W Valve Mechanism is
a float operated valve that automatically adds water or
other liquids whenever necessary to maintain a pre­scribed level, its versatility and large feeding capacity fit
it for a wide range of applications. Its simplicity of design
and quality of construction provides dependability.

INSTRUCTION MANUAL

SI-27W

REVISION C

McDONNELL & MILLER No. 27W

McDONNELL & MILLER
NO. 27W

McDonnell & Miller No. 27W –– Flange Mounted Outside Receiver Tank

McDONNELL & MILLER
NO. 27W

MAINTENANCE:

McDonnell & Miller No. 27W –– Mounted Inside Receiver Tank

Blow down tank weekly during heating season.

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Blow down may have to be more frequent
depending on local water conditions and the
amount of make-up water

•

Replace control every 5 years.

WARNING

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TION

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CA

ING

N

WAR

• Before using this product read and understand instructions.

• Save these instructions for future reference.

• All work must be performed by qualified personnel trained in the proper application, instal­lation, and maintenance of plumbing, steam, and electrical equipment and/or systems in
accordance with all applicable codes and ordinances.

• Drain water level down below feeder and let cool to 80° (27°C) before servicing.

• If tank or receiver is pressurized relieve pressure to 0 psi (0 Bar) before servicing.

• To prevent water damage check to make sure there is adequate floor drainage capacity.
Check all components in the system to insure they will not leak in the event of an
overfeed condition.

California Proposition 65 warning! This product contains chemicals known to the

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!

state of California to cause cancer and birth defects or other reproductive harm.
Previous controls should never be installed on a new system. Always install new

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controls on a new boiler or system.

Failure to follow this warning could cause property damage, personal inj ury or death.

CAUTION:

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

A more frequent replacement interval may be necessary based on the condition of
the unit at time of inspection. McDonnell Miller s warranty is one (1) year from date

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of installation or two (2) years from the date of manufacture.

Xylem Inc.

8200 N. Austin Avenue
Morton Grove, Illinois 60053
Phone: [phone]
Fax: [phone]
www.xyleminc.com/brands/mcdonnellmiller

McDonnell & Miller is a trademark of Xylem Inc. or one of its subsidiaries.

© 2013 Xylem Inc. SI-27W-C July 2013 Part No. 246735