11 Maintenance notes
Cleaning of KPI units
SMGB0099 rev.0 - 12/2016
364
Cleaning energy recovery ventilation unit elements
? NOTE
Clean the element once or more every two years to prevent the air ow and efciency from dropping.
! CAUTION
• Do not wash the element with water under any circumstances.
• Do not use the hard nozzle on the vacuum cleaner, as this could damage the exposed parts of the heat exchanger.
Hold onto the handle. Remove the two total heat exchanger elements from the main unit.
KPI-(252-2002)E4E and KPI-(502-1002)X4E
Use a vacuum cleaner to suck up any dust and dirt from the
exposed surfaces of the total exchanger elements.
Fit a nozzle with a brush to a vacuum cleaner to carry out 
this task.
Clean the elements by brushing the exposed surfaces
gently.
Fit the element.
Fit the air lter.
Close the service cover.
Corner
Total heat
exchanger
element
Vacuum
cleaner
(with brush
attachment)
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