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Make sure that the mains supply to the unit is disconnected before performing any installation, service, maintenance or
electrical work!
8.3 Maintenance
fig. 8.e
fig. 8.d
fig. 8.c
fig. 8.f
• Keep the unit surface free from dust.
• Clean the filters with a vacuum cleaner following the below illustrations (Fig. 8.c-d-e-f) when the FILTER signal (Fig. 7.c - )
is displayed on LCD. The actual need to perform this operation may vary depending on indoor and outdoor ambient conditions.
• Press FILTER button (Fig. 7.c - ) to reset the Filter Alarm.
• Filters must be replaced every year.
h
e
8.2 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. It is possible to easily disconnect and replace the fans if necessary.
Filters
The filters are of filter quality G4 for both the supply air and extract air filter.
The and QR590E units are equipped with a F7 filter on the supply air.
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 an enthalpic heat exchanger, suitable to transfer thermal energy and humidity from one airflow to the
other. The heat exchanger is removable for cleaning and maintenance during service.
Thermistors
Temperature probes to implement temperature dependent functions.
QR280E
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