10
L8000013 –
Maintenance instructions for Duco Ventilation systems
E.3 How to clean the casing
1� Cleaning of the casing must be carried out by the resident�
2� Clean the casing of the heat recovery ventilation system only with a damp cloth (water and soap (e�g� an all-purpose
cleaner))�
3� You are strongly advised against the use of abrasives (e�g� sandpaper or scouring pads), pressure washers and harsh
cleaners (e�g� solvents or ammonia), that can affect the paintwork or plastic parts�
E.4 How to carry out check-ups
1� Check-up must be done by an accredited installer�
2� Isolate the DucoBox WTW�
3� Open the door�
4� Loosen the screw completely, releasing the control panel�
5� Loosen the other 5 screws half way, so that the aluminum plate can be pushed upwards�
6� Check the proper functioning of the heat recovery ventilation system�
7� Carry out a visual check towards the water-side to see if there are any leaks�
8� Check that the water on the plate under the evaporator can drain properly to the siphon� Make sure the hole is free of
dirt or other obstructions�
9� Check the fan and evaporator for fouling� A small amount of fouling has little effect on the extract unit's and the evapo-
rator's performance� If the fouling is more than 1 mm thick , we advise you to have them cleaned�
10� Check the bearings� You can do this by turning the impeller by hand�
11� Check that the bearings do not make noise and that no resonance occurs�
12� Check that the fan is not swinging�
13� When the fan is set in motion by hand, it only makes a few revolutions and then comes to a standstill with some jerks�
This is a characteristic of a DC extract unit and is therefore entirely normal�
14� Depending on the outcome of the inspection, the extract unit will need to be cleaned and/or prepared for use�
15� Check that there are no air leaks�
16� Check the central heating water pressure and top up if necessary� See installation manual DucoBox WTW�
17� Close the cover�
18� Put the DucoBox WTW under tension again�
19� Check that no error messages appear on the display�
20� Check that the DucoBox WTW does not make any noise and that no resonance occurs�
21� In case of leaks or other repairs, please contact your supplier�
