Service
Annual maintenance
General cleaning
The ventilation unit should be cleaned inside once a year. Dust can escape through the filters and possibly mix with moisture from the exhaust air.
Plug the ventilation unit on the control panel and switch off the power supply to the ventilation unit before opening the front door of the unit.
You can vacuum the ventilation unit before cleaning it on the inside with a slightly damp cloth. Be careful around potentially sharp edges. Be careful not to let water get into the electrical control system.
The ventilation unit should also be cleaned on the outside with a slightly damp cloth and a mild detergent.
Over time, a ring may form around the intake valves. This is a natural phenomenon caused by dust in the room air. It is not due to faulty filters or filters that are not replaced.
Since painted ceilings are rarely washable, we recommend vacuuming the area around the flaps before wiping them with a slightly damp cloth.
It is a good idea to loosen the valves and then clean them when necessary. The valves are set to a certain air volume by the installer, so it is important not to turn them, as this will change the setting and unbalance the ventilation system.
Water lock
During cold periods, when the ventilation unit operates with a high heat recovery level, the exhaust air causes condensation. It is important that this water can drain freely from the condensation tray. If it cannot drain properly, it will eventually leak from the door of the unit and possibly cause water damage.
If the cooling function is switched off, must you check the condensation drain every autumn before the cold season starts. (Condensation usually occurs at an outdoor temperature of <10°C)
Procedure:
- Pour water into the condensation tray
- Close the door of the ventilation unit
- Turn on the ventilation device and let it run for 10 minutes.
- Open the door of the ventilation unit and check that the water has drained and has not run back into the condensation tray.
- If the water has drained, everything is fine.
If the water did not drain, check the water trap (the bend/tube) and the drain for blockages.
Heat exchanger
The counterflow heat exchanger is a central part of the ventilation unit. It heats the cold outside air with energy from the warm outside air. For high heat recovery, it is important that the heat exchanger is not clogged with dirt.
Experience shows that it is not necessary to remove and clean the heat exchanger every year. However, if it appears dirty, you should take it out and clean it.
The easiest way to clean the counterflow heat exchanger is in the shower. Use lukewarm water and rinse it thoroughly on both sides. Let it drip off before reassembling it in the ventilation unit.
Check the air inlet and outlet
It is important for the operation of the unit that air can flow freely through the air inlet and outlet.
If roof chimneys are fitted for the air inlet and outlet, check that they are not clogged with birds' nests, leaves or other debris that could impede air passage.
If grilles are fitted in gables or eaves instead of roof chimneys, check that they are not clogged with leaves or dirt. Grates in particular can become clogged.
Check the ventilation ducts
It is important for the operation of the unit that there is a free air passage in the ventilation ducts.
After several years of use, dirt will settle in ventilation ducts or pipes, and accumulations can lead to a higher pressure drop in the ducts, resulting in higher energy consumption. Therefore, it is important to clean the ducts when too much dirt has accumulated.
After the intake and exhaust valves have been checked, it is advisable to have them readjusted to ensure optimum operation of the ventilation system.
However, it will not be necessary to clean channels more than every few years.
Check the heat pump
The heat pump must be inspected in accordance with applicable laws and regulations to ensure it is maintained in good condition and meets safety and environmental requirements.
The installer is obliged to inform the owner/user of the applicable laws and regulations.