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UNIT OPERATION MODES
Heat recovery mode:
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
SUPPLY AIR
INTAKE AIR
EXHAUST AIR
Defrosting mode:
to prevent the heat exchanger freezing in the cold season the unit has an automatic Defrosting mode. This mode
is activated by the freeze protection temperature sensor located in the exhaust air duct downstream of the heat exchanger. The unit
switches to the Defrosting mode at the extract air tempe3 ° C. As the temperature rises the unit returns to the previous mode.
Only the extract fan operates in the Defrosting mode, the supply fan is switched off.
EXTRACT AIR
SUPPLY AIR
INTAKE AIR
EXHAUST AIR
Summer Cooling mode:
the bypass damper is opened, the intake air that is supplied to the premises bypasses the heat exchanger. The
intake air temperature remains constant.
EXTRACT AIR
SUPPLY AIR
INTAKE AIR
EXHAUST AIR
