26
GB
GB
7. MAINTENANCE AND SERVICE
Fig. 8.d
Fig. 8.f
Fig. 8.c
Fig. 8.e
Fig. 8.b
7.3 Maintenance
• Keep the unit surface free from dust.
• Clean the filters every three months with a vacuum cleaner and replace the filters every year. This may differ per situation depending on
internal and external environmental conditions (fig.8 b-c-d-e-f).
WARNING
Make sure that the mains supply to the unit is disconnected before performing any installation, service, maintenance or electrical work!
7.2 Description of Components
Fans
The fans have external rotor motors of EC type which can be steplessly controlled individually between 10–100%. The motor bearings are life
time lubricated and maintenance free.
Filters
The filters are of filter quality G4 for both the supply air and extract air filter. The filters need to be cleaned regularly (and replaced when polluted)
during maintenance. New sets of filters can be acquired from your installer or wholesaler.
Heat exchanger
The unit is equipped with a highly efficient, counter-flow plate heat exchanger. Supply air temperature is therefore normally maintained without
adding additional heat. The heat exchanger is removable for cleaning and maintenance during service.
Condensation drainage
Depending on the relative humidity in the extract air, condensation may occur on the cold surfaces of the heat exchanger, on one side in winter
time, on the other side in summer time (fig.6.b).
The condensate water is led out through drain plugs.
Thermostat
If external temperature is too low, the heat exchanger might get frosted, and therefore damaged. To avoid this, dedicated thermostat switches
off the supply fan if and when needed.
Vacuum cleaner
