19
9. Filtration & Pressure Differential Monitoring
The integrated Grundfos Pressure Differential Sensor, (DPS) and DEK1002 controller
within these sidestream units monitor the pressure drop across the inlet and outlet of the
MagnaClean CMX Midi
filter as the cartridge filters fill-up with captured system debris.
The controller has two preset warning and alarm settings based on debris collection rates within
the spun-bonded cartridge filters
used with the
CMX Midi
filter. The first ‘warning’ setting sets off an
audible and visual alarm, warning that the installed cartridges are beginning to fill with debris and that
a service visit will be required soon. The second ‘alarm’ setting creates an audible and visual alarm,
warning that the installed cartridges are saturated with system debris, automatically switching off the
integrated pump. When this alarm function is activated, a service visit is required to clean the internal
magnet and replace the cartridge filters before the unit can be reset and put back into filtration mode.
For accurate pressure differential monitoring warnings and alarms, cartridge filters must be
installed in the filter housing;
the DEK1002 controller does however feature
programmable magnet-
only service warning alarms
for when the sidestream skid unit filters are configured with magnets
only, with no cartridge filters installed.
These magnet-only warnings are based on time elapsed
rather
than differential pressure measurement across the filter, as there is no distinguishable pressure drop
across the filter without cartridges installed, even when they are full of captured magnetic debris.
These time-based alarms are important as ADEY always recommend that when a
CMX
filter is installed onto an existing heating or chilled system, the filter should initially be
configured with magnets only.
This is to ensure that cartridge filters aren’t needlessly wasted
& blocked with magnetic system debris. The programmable daily, weekly or monthly alarms
are intended as service reminders which can be easily reset within the controller menu.
After initial set up of the unit, we would recommend a service visit within 24-48 hours to check
magnetic debris capture levels and service as required. Subsequent service intervals will largely
depend on the amount of debris being captured. To ensure the unit is able to fully protect and filter the
system it is installed upon, regular servicing & maintenance of the
CMX Midi
filter is recommended.
Once magnetic capture rates begin to reduce, 5, 10, 20 or 50-micron cartridge filters should
then be installed to capture non-magnetic debris within the system whilst also assisting in the
capture of any remaining/reoccurring magnetic system debris in conjunction with the internal
magnet array and where required, the
CMX Midi External Magnetic Jacket
accessory.
However, there is no right or wrong way to configure the CMX Midi filter, which can be
configured with cartridge filters immediately if that is what you believe the system requires.
Please contact ADEY Customer Services on +44 (0)1242 546717 if you have any queries.
