Functional Description Balanced Ventilation; Fans (M1, M2); Filter (Fi1, Fi2); Heat Recovery System (Hr-R) - Flexit UNI 3 User Manual

1 Functional Description Balanced
Ventilation
1.1

Fans (M1, M2)

The fans ensure that air enters and leaves the building. These
can be individually adjusted for optimal operation. The unit
can be regulated at 3 different speeds using the operating
panel; Min, Normal and Max. See section 5.1 for more
information.

1.2 Filter (FI1, FI2)

Filters with a high filter grade (ePM1 55% F7) are used as
standard both for supply air and extract air, so that the air
which enters the building is clean. The filters also ensure that
the unit stays clean.

1.3 Heat recovery system (HR-R)

The air goes through the rotary wheel heat recovery system.
The rotor functions as a heat storage. The heat from the
extract air heats up one half of the rotor. When the heated
part comes over to the supply air side, the heat is transferred
to the supply air.

1.4 Heating element (EB1) (for UNI 3 E)

If the heat recovery system cannot raise the temperature
enough, an electrical heating element will raise the
temperature to a set level. The heating element is protected
against overheating by the thermostat (F20), which switches
off at 60°C. As an additional safety measure, the F10
thermostat switches off at 85°C. The F10 thermostat must be
reset manually by pressing the reset button (see Fig. 2).

1.5 Temperature sensors (B1, B4)

The unit has two temperature sensors as standard. Supply air
sensor B1 registers the temperature of the heating battery.
The outdoor air sensor (B4) registers the temperature of the
outdoor air.
UNI 3 User Manual
Fig. 1
M2
K
Fig. 2
4
B4
EB1
FI1
HR-R
M4
reset button
B1
FI2
F20
F10
M1