10
Maintenance can be carried out by the user.
Service must be performed only by an authorized installer and in accordance with local rules and regulations .
Questions regarding installation, use, maintenance and service of the unit should be answered by your installer or place of purchase!
8 maINtENaNcE aND sErvIcE
WARNING
Make sure that specific warnings and cautions in Chapter 2 “Precautions” are carefully read, understood and applied!
8.1 Components list
Fig. 8.a
Internal components
1
2
3
4
5
6
7
8
G4 FILTER
HEAT EXCHANGER
CONDENSATION DRAINS
THERMISTOR
FAN, INTAKE AIR
FAN, EXHAUST AIR
ELECTRICAL CONNECTION CARD
CABLE ENTRY
3
8
2
5
4
6
1
7
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 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
7.6 Anti-frost functionality
The unit is equipped with a thermostat which, when necessary, reduces the speed of the intake fan to prevent the freezing of the heat exchanger, which could
get damaged irreparably.
7.7 Bypass functionality
The QR350MBP is equipped with a physical bypass which allows to mitigate the heat exchange when the indoor and outdoor temperature combinates are
such that the heat exchange is not recommended.
Bypass can be activated through a dedicated switch (see Fig. 5.j to 5.n), or via the relevant switch integrated into the CTRL-S (Fig.5.o)
Summary of Contents for QR350MBP
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