Brochure

Series 751P/752P
Manual Reset for Hot Water Boilers
For over 85 years, McDonnell & Miller has been a name
you can trust and rely on for boiler safety controls.
Features and Benefits Include:
CSD-1 Code Compliance
If the control is in a low water condition (water off probe) when there
is an interruption of power, the control will remain in a low water
condition when power is restored. The reset button will have to be
pressed when the water level is restored to a level above the probe.
Power Interruption
If there is a loss of power, the control will automatically reset if there
was water on the probe before the loss of power AND there is water
on the probe when the power is restored.
Self-cleaning Probe
This is available only on McDonnell & Miller probe type controls
which reduces probe maintenance to once every five years instead
of annually.
Test Button
Standard on all controls to allow the control to be tested without
draining the boiler or system.
‘Green’ Power On & ‘Red’ LWCO LED’s
Standard on all units to give visual indication that the unit is powered
up and when a low water condition is detected.
The Series 751P/752P probe type LWCO’s provide protection
against low water conditions for commercial and industrial
applications. These controls are fully CSD-1 complaint and are
primarily used as LWCO’s on hot water heating boilers and can
be used as the secondary (manual reset) on steam boilers.

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