DESIGN AND OPERATING PRINCIPLE
The unit has the following operating principle: 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. Heat energy of warm extract air is transferred to clean intake fresh air from the outside and warms it up. 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.
UNIT DESIGN
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2
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15
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12
1
– cable glands;
2
– control unit;
3
– bypass damper (except KOMFORT EC S(1)160(-E) models);
4
– counter-flow heat exchanger;
5
– extract filter;
6
– supply filter;
7
– supply fan;
8
– extract fan;
9
– drain pan;
10
– drain pipe;
11
– extract filter differential pressure switch
(only for the KOMFORT EC SB 550(-E) S21 units);
12
– EVH duct electric preheater connector;
13
– ENH duct electric reheater connector;
14
– SETUP MODE button (for the units with S21 automation);
15
– supply filter differential pressure switch (only for the KOMFORT EC SB 550(-E) S21
units).
The air handling unit is equipped with a hinged front service panel for repair and maintenance operations. The removable service panel
design enables to change the service side location. The control unit is accessible for installation and wiring operations through the
inspection door on top of the unit. The power cable and ground cable are connected to the control unit via the cable glands.
The bypass damper is open or closed depending on operation mode of the unit.
The KOMFORT EC SB550(-E) units are equipped with differential pressure switches for filter contamination control. Access to the pressure
switches is provided through the inlet and outlet spigots.
The difference between the supply and extract air flow temperature leads to condensate generation in the KOMFORT EC S(1)(B) 160/350/550
units. Condensate is collected in the drain pan and is removed outside through the drain pipe.
The KOMFORT EC S(1)(B) 160/350/550-E units are equipped with a heat exchanger with an enthalpy membrane and do not require
condensate drainage.
Accessories for the unit are available on a separate order.
•
Humidity sensor.
The
FS2
sensor in the EC KOMFORT EC S(1)(B) 160/350/550(-E) S21 models is connected to the controller. In the
KOMFORT EC S(1)(B) 160/350/550(-E) S14 models, the
FS2
sensor is connected to the terminal block. The
HR-S
sensor is connected
to the controller. The unit with an installed humidity sensor maintains a set indoor humidity point. As the extract air humidity rises
above the set point, the system automatically switches to the maximum speed. As the humidity drops down below the set point the
unit returns to the previous mode.
•
CO
2
sensor
(connected to the controller). Designed for indoor carbon dioxide concentration measurement and respective air capacity
regulation through the control output signal to the fan.
•
VOC sensor
(connected to the controller). Qualitative assessment of air saturation with contaminants (cigarette smoke, exhaled air,
solvent and detergent vapours).The sensor sensitivity can be adjusted with regards to the expected maximum level of air pollution.
Enables on-demand ventilation which results in considerable energy savings as air is exchanged only upon reaching the preset level
of pollution.
•
EVH duct preheater
(for the KOMFORT EC S(1)(B) 160/350/550(-E) S21 units). The heater maintains the duct air temperature at a
point that prevents the heat exchanger freezing. Heater installation and connection to the unit are described in the heater user’s
manual.
•
ENH duct reheater
(for the KOMFORT EC S(1)(B) 160/350/550(-E) S21 units). The heater maintains a room temperature set by the
temperature sensor. Heater installation and connection to the unit are described in the heater user’s manual.
www.blaubergventilatoren.de
KOMFOrt EC S(1)(B) 160/350/550(-E)
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