Xylem MM 110C Series PFC 1G PFC 1GR Modulating Pneumatic Liquid Level Controls - Manual

INSTRUCTION MANUAL
Model PFC-1-G (direct acting)
PFC-1-GR (reverse acting)
Modulating Pneumatic
Liquid Level Controls
APPLICATIONS:
– Use with other pneumatic devices, for liquid level
sensing in tank or pressure vessel where electrical
processes are not suitable, such as certain hazardous
locations.
Features:
– A float-operated, modulating, pneumatic level controller
– Side-mounting pipe connections
– Direct or reverse action convertible
– Field adjustable operating range & proportioning band
Ratings:
Maximum Vessel Pressure: 250 psig (17.6 kg/cm 2 )
Maximum Fluid Temperature: 406° F (208°C)
Maximum Supply Air Pressure: 20 psig (1.4 kg/cm 2 )
• Before using 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.
• If tank or receiver is pressurized relieve pressure to 0 psi (0 Bar) before servicing.
Drain water level down and let cool to 80°F (27°C).
• Boiler manufacturer schematics should always be followed. In the event that the boiler
manufacturer's schematic does not exist, or is not available from the boiler manufacturer,
refer to the schematics provided in this document.
• 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.
• After installation, check for proper operation of all of the limit and operating controls before
leaving the site.
WARNING
CAUTION
! WARNING
MM-110C
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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