Unit Design And Operating Principle - Vents MICRA 80 A3 User Manual

• The unit casing is made of painted steel, internally filled with a layer of heat- and sound-insulating material.
• The cross flow plate heat exchanger, the supply and the extract fan are installed inside the unit.
• The front panel is installed on the latches to enable quick access for unit servicing.
Extract fan
Supply fan
Thermostat
Control panel
4 3
• If the exhaust air temperature falls down below +3 °C the heat exchanger is subjected to the freezing danger. The freeze protection thermostat
is 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 unit
operates in air exhaust mode only. After the heat exchanger is warmed up and there is no freezing danger the unit reverts to the standard
operation mode.
The unit has the following operating principle.
Warm stale extract air from the room flows to the unit, where it is filtered, then
air flows through the heat exchanger and is exhausted outside by the extract fan.
Clean cold air from outside is moved to the supply filter. Then filtered air flows
through the heat exchanger and is moved to the room with the supply fan.
Heat energy of warm extract air is transferred to clean intake fresh air from
outside and warms it up. Heat recovery minimizes thermal energy losses and
space heating expenses in cold seasons.
The unit heat exchanger is able to recover not only heat energy but contained
humidity thus maintaining indoor humidity level. In summer time the heat
exchanger serves for supply air cooling and dehumidification and in winter time
for its heating and moistening.
DESIGN AND OPERATING PRINCIPLE
UNIT DESIGN
Extract lter
Intake lter
Heat exchanger
Front panel
SUPPLY AIR
EXHAUST AIR
INTAKE AIR
EXTRACT AIR
7