Xylem MM 277G Model RB-24E-S , Model RB-24E-A , Model RB-24E-L , Conductance Type LowWater Cut-Off User Manual
Conductance type low water cut-off
INSTRUCTION MANUAL
Model RB-24E-S
Model RB-24E-A
Model RB-24E-L
Conductance Type
Low Water Cut-Off
with Universal Wiring Harness
For Residential
24 VAC Hot Water Boilers
• 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,hot water and electrical equipment and/or
systems in accordance with all applicable codes and ordinances.
• 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 of the operating
controls, before leaving the site.
• We recommend that secondary (redundant) Low Water Cut-Off controls be installed on all
steam boilers with heat input greater than 400,000 BTU/hour.At least two controls should
be connected in series with the burner
should the boiler experience a
low water cut-offs should be
calibration and performance.
control circuit to provide safety redundancy protection
low-water condition. Moreover, at each annual outage, the
dismantled, inspected, cleaned, and checked for proper
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
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.
•
!
the unit at time of inspection. McDonnell & Miller s warranty is one (1) year from date
&
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MM-277G