Xylem MM 251C Series 750B-C3 Chamber with 3 Probes Series 750B-C4 Chamber with 4 Probes - Manual

INSTRUCTION MANUAL
Series 750B-C3 Chamber
with 3 Probes
Series 750B-C4 Chamber
with 4 Probes
Features
• Cast Iron Body
• Sight Glass Tappings
• Gage Cock Tappings
• Stainless Steel Probes
• NEMA 4X Electrical Enclosure
• 250 psi Maximum Working Pressure
Designed for use with the Series 750B remote
mount control module to make a complete system
for level control in a boiler or other vessel.
Remote Chamber
• 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.
• To prevent serious burns, the boiler must be cooled to 80˚F (27˚C) and the pressure must
be 0 psi (0 bar) before servicing.
• To prevent electrical shock, turn off the electrical power before making electrical
connections.
• This low water cut-off must be installed in series with all other limit and operating controls
installed on the boiler. After installation, check for proper operation of all the limit and
operating controls, before leaving the site.
• To prevent serious personal injury from steam blow down, connect a drain pipe to the
control opening to avoid exposure to steam discharge.
• To prevent a fire, do not exceed the switch contact rating.
WARN ING
CAUTION
! WARNING
MM-251C
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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