Xylem MM 317C Models 21 & 221 Mechanical Water Feeders - Manual

• 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, instal-
lation, 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.
Model 21
Model 221 SA21-6
Maximum water supply pressure: 150 PSIG (10.55 kg/cm 2 )
Maximum vessel pressure: 35 PSIG (2.46 kg/cm 2 )
Maximum fluid temperature: 120°F (49°C)
Model 21 and 221
Mechanical Water Feeders
And Replacement Valve Assembly SA21-6
Applications:
For receiver tanks in industrial or
commercial applications.
WAR NING
CAUTIO N
! WARNING
INSTRUCTION MANUAL
MM-317C
California Proposition 65 warning! This product contains chemicals known to the •
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 •
controls on a new boiler or system.
CAUTION:
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
of installation or two (2) years from the date of manufacture.
Failure to follow this warning could cause property damage, personal inj ury or death.
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