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Inspection of the heat exchanger cell
Before starting inspection make sure that the electricity wires of HRV are disconnected from a wall socket
and the machine has no voltage. Wait at least two minutes after disconnecting electricity to let the fans to
stop completely and the electricity resistance unit to cool slightly.
Normally, because of constant air streaming through the heat exchanger cell, the device remains relatively
clean, but if needed the heat exchanger can be removed for cleaning. The exchanger is cleaned preferably
using compressed air or a vacuum-cleaner or,
and neutral detergent. Use of high pressure washer for cleaning of the heat exchanger is strictly forbidden,
because it could damage the fragile slats of the cell. It is also forbidden to fully submerge the heat
exchanger, because the electric motor placed inside the case could be damaged. After the heat exchanger
is removed from the unit, other parts remaining mounted on the wall should be cleaned with a damp cloth.
Removing the heat exchanger from HRV
1.Turn off the heat exchanger ventilation unit by disconnecting the electricity plug from the wall socket, wait
for at least two minutes so that the fans have fully stopped and heating unit would slightly cool down.
2. Open the HRV door by using flat head screwdriver.
3. Disconnect the electricity connectors of the exhaust fan from the right side of the heat exchanger case.
Coming from above wires could remain hanging.
4. Disconnect the electricity connectors (5 pieces) and sensors (2 pieces).
5. Carefully pull out the heat exchanger case from the HRV, simultaneously checking with the hand that
there is enough room for the fastening plate and wires to come out with the case and there is nothing
holding them back.
The heat exchanger is cleaned preferably using compressed air or, alternatively, under a hand shower with
a mild and neutral detergent. Use of high pressure washer is strictly forbidden.
On the side of the heat exchanger case there is the controller unit, which contains electronic components;
Also inside the heat exchanger case there is electric motor. It important to prevent from getting water on any
of these components.
After removing the heat exchanger from HRV, other parts remaining mounted on the wall should be cleaned
with a damp cloth.
Disconnect the connectors
and
removing of the unit
Picture 10: connector locations
Cleaning of the fans.
Normally, HRV fans don't require maintenance, but if needed it is possible to remove them for servicing.
HRV fans can be removed only if electricity wires of the fans are disconnected and Allen screws of the
fastening lists (2 pieces/fan, Allen key 5 mm) are unfastened. Wings of the fans can be cleaned with
compressed air or, for example, with a toothbrush.
the
sensors
before
alternatively, by rinsing it under hand shower using a mild
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