Xylem MM 283D User Manual
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• 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.
• 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 serious burns, allow the control and surrounding equipment to cool to 80˚F (27˚C)
and allow pressure to release to 0 psi (0 bar) before servicing.
• To prevent electrical fire or equipment damage, electrical wiring insulation must have a rating
of 167°F (75°C) if the liquid’s temperature exceeds 180°F (82°C).
• 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 limit and
operating controls, before leaving the site.
•
Wh en using mix ed v oltag es, d o not j umper from terminal 1 to terminal 3 .
• To prevent electrocution, when the electrical power is connected to the control, do not
touch the terminals,or electrical wires.
•
To prevent electrical shock, turn off the electrical power before making electrical
connections.
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.
Failure to follow this warning could cause property damage, personal inj ury or death.
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.
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Manual Reset units follow CSD-1 Code Compliance.
120°
120°
49
49
On Manual Reset Units, if the control is in low water
On Manual Reset Units, if the control is in low water
condition (water is off the probe) and there is a sudden
condition (water is off the probe) and there is a sudden
power interruption, the control will remain in low water
power interruption, the control will remain in low water
condition (Burner Off) even if the power is restored. The
condition (Burner Off) even if the power is restored. The
Reset Button must be depressed to make the control
Reset Button must be depressed to make the control
back to function, after the water level is re-established
back to function, after the water level is re-established
to the probe.
to the probe.
Lock Out DelayLock Out Delay
When a low water condition occurs the burners turns off
When a low water condition occurs the burners turns off
and Red LED begins to blink. When the water level is
and Red LED begins to blink. When the water level is
restored to a level above the probe within 30 sec, the
restored to a level above the probe within 30 sec, the
boiler will return to the normal operation. If the water
boiler will return to the normal operation. If the water
level remains in low condition, control will go to a low
level remains in low condition, control will go to a low
water condition and Red LED will be solid Red.
water condition and Red LED will be solid Red.
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