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www.blaubergventilatoren.de
FRESHBOX E120
Fig. 1. Unit design and operating logic
DESIGN
The double-skinned unit casing is made of white polymer-coated steel
plates, internally heat- and sound insulated with 10 mm cellular rubber layer.
The unit casing is equipped with fi xing elements for wall mounting. The
spigots for connection to the air ducts are located at the side of the unit and
are equipped with rubber seals for airtight connection to the air ducts.
The unit is equipped with high-effi
cient external rotor EC motors and
centrifugal impellers with forward curved blades for air supply and exhaust.
The unit is equipped with a high-effi
cient counter-fl ow polystyrene
heat exchanger with a large surface area. The air fl
ows are fully
separated within the heat exchanger. Odour and contaminants
contained in the extract air are not transferred to the supply air fl ow.
The electronic frost protection system is used to prevent the heat
exchanger freezing in cold seasons. The air temperature behind the heat
exchanger falls down as ice gets accumulated in the heat exchanger. If
exhaust air temperature falls down below +3 °C the supply fan is shut down.
Meanwhile the warm extract air fl ow warms up the heat exchanger and the
ice melts. As air temperature behind the heat exchanger rises above +3 °C,
the supply fan restarts and the unit reverts to the rated operation mode.
The drain pan under the heat exchanger unit is designed for condensate
collection. As the drain pan is fi lled with condensate the unit is turned off
and the status is displayed by the indicator on the control panel. Empty the
condensate from the drain pan and restart the unit.
The unit is equipped with a 350 electric posistor heater used for operation
of the unit at low outside air temperatures. The electric heater has integrated
overheating protection.
Two integrated panel fi lters are used for effi
cient air supply and air
extraction.
The units incorporates an integrated control system and a
multifunctional external control panel with LCD display and a remote control.
OPERATING LOGIC
Cold fresh air from outside fl ows through the heat exchanger and is
moved to the room with the supply fan.
Warm extract air is extracted from the room with the exhaust fan and is
moved through the heat exchanger, where it transfers its heat energy to the
intake air. After that it is exhausted outside.
Heat energy of warm and humid extract air is transferred to the cold fresh
air. The air fl ows are fully separated while fl owing through the heat exchanger.
Heat recovery minimizes heat losses caused by traditional window
ventilation and saves energy.
In summer the heat exchanger performs reverse and transfers cold
from the cooled extract air to the warm fresh air. This contributes to better
performance of the air conditioner in ventilated premises.
EXHAUST FAN
EXTRACT AIR
SUPPLY AIR
INTAKE AIR
EXHAUST AIR
SUPPLY FILTER
DRAIN PAN
HEAT EXCHANGER
SUPPLY FAN
POSISTOR HEATER
EXTRACT FILTER