UNIT OPERATION MODES
Intake air
Supply air
Extract air
Exhaust air
Heat recovery
Warm stale extract air from the room flows into the unit, where it is
filtered by the extract filter, then air flows through the heat exchanger
and is exhausted outside by the extract fan. Cold fresh air from the
outside flows into the unit, where it is cleaned by the supply filter. Then
the air flows through the heat exchanger and is directed to the room
with the supply fan.
Supply air is heated in the heat exchanger by transferring the heat
energy of warm and humid extract air to the cold fresh air. The air flows
are fully separated while flowing through the heat exchanger. Heat
recovery minimizes heat losses, which reduces the cost of space heating
in the cold season.
Extract air
Exhaust air
Intake air
Supply air
Freeze protection
The heat exchanger freeze protection function of the unit is implemented
with a temperature sensor installed in the exhaust air duct downstream
of the heat exchanger. In case of a freezing danger the supply fan is
turned off and the heat exchanger is warmed up with warm extract air
flow. The recommended sensor or thermostat operating temperature
is +3 °C (exhaust air temperature). If necessary, this setting can be
changed with the software. After temperature increase the unit returns
to the previous operation mode.
Intake air
Supply air
Extract air
Exhaust air
Summer Cooling mode
The bypass dampers are opened, both air flows are routed along the
bypass duct and do not come in contact with the heat exchanger.
ATTENTION!
The fans start operation 2 minutes after the unit is turned on.
After opening or closing of the bypass damper the fans turn off for 2 minutes.
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