UNIT OPERATION MODES
Heat Recovery mode
Summer Cooling mode
Warm extract air from the room flows into the unit and is cleaned in
the extract filter. Then the air is moved through the heat exchangers
and is exhausted outside with the extract fan. Cold fresh air from
outside flows into the unit, where it is cleaned in the supply filter.
Then the air flows through the heat exchanger and is directed to
the room with the supply fan.
Heat is exchanged between the intake and extract air in the heat
exchanger. 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.
INTAKE AIR
SUPPLY AIR
EXTRACT AIR
EXHAUST AIR
Service side view
The bypass damper is opened, the extract air that is removed from
the premises is routed along the bypass duct and does not come in
contact with the heat exchanger. The temperature of the air is not
changed after passing through the heat exchanger.
INTAKE AIR
SUPPLY AIR
EXTRACT AIR
EXHAUST AIR
Back side view
Heat exchanger freeze protection
(frost danger appears when the extract air temperature downstream of the heat exchanger is lower
than +5 °C and intake air temperature upstream of the heat exchanger is lower than -3 °C for units with preheating and +3 °C for units
without preheating).
In case of freezing danger the supply fan is turned off in the
KOMFORT EC S(1)(B)160/350/550(-E) S14 units.
When the temperature increases, the unit returns to the previous
operation mode.
INTAKE AIR
SUPPLY AIR
EXTRACT AIR
EXHAUST AIR
Service side view
There are three freeze protection modes for the KOMFORT EC S(1)(B)160/350/550(-E) S21 units:
• gradual speed reduction of the supply fan
• with the help of a bypass
• with the help of electric preheating of air (if the unit is equipped with a duct preheater)
Mode selection and settings are described in the S21 control system user’s manual.
www.blaubergventilatoren.de
KOMFOrt EC S(1)(B)160/350/550(-E)
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