Flexit Nordic S3 - Functional Description of Balanced Ventilation; Key Components; Airflow Control Features

7
NORDIC S3
2. Functional description of balanced ventilation
2.6. FOR USE WITH DAMPERS
2.6.1. Damper (DA1)
There is a closing air damper in the exhaust air duct to
prevent cold draughts.
2.6.2. Damper (DA2)
There is a closing air damper in the outdoor air duct to
prevent cold draughts.
If a water battery is used, the damper prevents frost
damage to the battery.
!
Adjustment must always be carried
out by qualified staff before the
installation is used for the first time.
2.7. KITCHEN FAN
To reduce the risk of negative pressure in the home,
when using a kitchen fan with an air volume above
approx. 200m
3
/h is compensated for this with, for
example, an outdoor air valve in the wall.
B1
M2
M1
EB
F10
F20
M4
HR-R
FI2
FI1
B4
K
DA1
DA2
B3/H1
B6
2.1. FANS (M1, M2)
The fans ensure that air enters and leaves the building.
They can be individually adjusted for optimal operation.
Theunitcanberegulatedat3dierentspeedsviathe
control panel: Home, Away, High.
2.2. FILTERS (FI1, FI2)
Filterswithahighltergradeareusedasstandardfor
both supply air and extract air so that the air which
entersthebuildingisclean.Theltersalsoensurethat
theunitstayscleanandcanmaintainthermaleciency
andairow.
2.3. ROTOR (HR-R)
The air passes through the rotary wheel-type heat
exchanger (recovery system). The rotor functions as
a heat magazine. The heat from the extract air heats
up one part of the rotor. When the heated part comes
over to the supply air side, the heat is transferred to
thesupplyair.
2.4. HEATING ELEMENT (EB)
If the energy recovered from the extract air is
insucienttomaintainthesetsupplyairtemperature,
an electric heating element will help raise the
temperature.Theheatingelementisprotectedagainst
overheating by the thermostat (F20) which cuts out
at high temperature. For extra safety, the thermostat
(F10) cuts out at critical temperatures. Thermostat F10
needs to be reset manually by pressing the reset button.
Seechap. Reset button on page 17.
2.5. TEMPERATURE SENSORS (B1, B3/H1,
B4, B6)
As standard, the unit has four temperature sensors.
Thesupplyairsensor(B1)registersthetemperature
after the heating battery. The extract air sensor (B3/
H1) registers the temperature and relative humidity of
the extract air. The outdoor air sensor (B4) registers the
temperature of the outdoor air. The exhaust air sensor
(B6) registers the temperature of the exhaust air.