Condair DL II, Operation Manual

Page: 49 / 80

49 Maintenance and Replacement of components
6.2.2 Total system maintenance
The frequency of the implementation of a total system maintenance depends on the operating conditions.
The state of the humidifier‘s hygiene and its components mostly depends on the quality of the humidifier
water, the performance (and the frequency of replacement) of the filter installed before the unit, the air
velocity, the air temperature, and the microbiological and chemical composition of the inlet air.
The basic rule is: when the "W28/E28 - Maintenance" message appears, or at least once a year,
the implementation of a total system maintenance is obligatory.
Resetting the "W28/E28 - Maintenance" message
Upon completion of the total system maintenance the maintenance due message can be reset via the
"Reset" submenu (see
Section 6.7
).
Item Work to be carried out
Nozzle system – Check the spray pattern of the atomizing nozzles during operation (spray
cone: 60° acceptable). Remove spray nozzles with a poor spray pattern and
clean them in an ultrasonic bath or with a household decalcifier.
– Check hoses and connections for sealing , if necessary, replace defective
components.
– Check spray nozzles for secure seating . Slightly tighten loose nozzles by
hand.
– Clean supporting structure, nozzle grid(s) and tubing with a combined
detergent and disinfectant (application in accordance with manufacturer data),
finally rinse all components with hygienically pure water (RO water).
Post-evaporation unit
– If the the post-evaporation unit is not accessible for cleaning from the air outlet
side, the ceramic plates must be removed.
– Check ceramic plates for damage . Damaged plates must be replaced.
– Check ceramic plates for soiling . Dust deposits are to be rinsed off with water.
Ceramic plates, which cannot be cleaned any more, have to be replaced.
Note: A grey discolouration of the ceramic plates is normal. This is due to
deposits from the silver ionization .
If the ceramic plates show severe deposits of dust, the ventilation system air
filter should be checked for cracks, cleanliness, and filter quality (min. MERV13
or better). Clean soiled plates.
– Clean supporting structure and sealing plates with a combined detergent
and disinfectant (application in accordance with manufacturer data), finally
rinse all components with hygienically pure water (RO water).
– Check the supporting structure, the ceramic plates, the sealing plates for
correct assembly and tight seating of screw connections . If necessary, install
faulty components correctly and tighten loose screw connections.
Central unit – Silver ionization : observe notes in Section 6.5 .
– Clean filter housing of the optional sterile filter and replace filter cartridge.
– Check hoses, connections, pressure sensors (PS4 and PS5), valves , etc.
in the central unit. Replace defective components where necessary.
Important: Replace pressure sensors (PS4 and PS5) every 3 years.