30
8.2. SETTING FAN SPEED BY HAND
If needed, fan speeds can be reduced or increased by
hand. The number of LEDs illuminated corresponds to
the fan speed set.
Press down symbol for reducing fan speed
for about 1 second.
Press down symbol to increase the fan
speed for about 1 second.
Fan speed V1 = humidity protection
Fan speed V2 = reduced ventilation
Fan speed V3 = nominal ventilation
8.3. TURN ON/OFF BOOST VENTILATION
The ventilation system can be turned on to the fan speed
boost ventilation, as needed, e.g., if many people are ga-
thering in the house.
Press symbol for about 1 second to enable
the boost. To disable the boost press the
botton 1 second again.
The symbol is lit during intensive
ventilation.
8.4. TURN ON/OFF SUMMER BYPASS
The summer bypass serves to bypass the heat exchan-
ger so that the cooler outdoor air is not heated. When
outdoor temperatures are lower, e.g. in spring or fall, the
ventilation system can be used without heat recovery so
that the cooler outdoor air is conducted into the building.
The summer bypass can be activated for 8 hours by hand.
Then the system switches to the fan speed most recent-
ly selected or to the weekly programme set, see Setting
weekly programme, page 26.
The following conditions have to be fulfi lled to open/close
the bypass automatically:
Activation conditions:
(Outdoor temperature > 13ºC) & (Indoor temperature >
23ºC) & (Indoor temp. – Outdoor temp. > 3ºC)
Deactivation conditions:
(Outdoor temperature ≤ 13ºC) OR (Indoor temperature ≤
23ºC) OR (Indoor temp. – Outdoor temp. ≤ 3ºC)
8.5. TURNING SLEEP MODE ON/OFF
When the sleep mode is activated, the ventilation system
shuts off for one hour. After this, it turns on again to the
most recent setting.
Press symbol for about 5 seconds.
The ventilation system turns off for one hour.
When the sleep mode has been turned on,
the symbol is lit.
8.6. TURNING SUMMER MODE ON/OFF
When outdoor temperatures are cooler, e.g., at night, the
supply air fan can be switched off. The outdoor air must
then reach the house through open windows without heat
recovery.
The summer mode can only be switched on when the
outdoor air temperature is above +13°C. If the outdoor
air temperature drops below this value, then the summer
mode is switched off again automatically.
After 2 hours, the temperatures are checked. For this
purpose, the supply air fan starts up again for 5 minutes.
If the outdoor temperature continues to 13°C,
then the function continues until it is turned off by hand
or until the temperature drops below +13°C.
Press symbol for about 5 seconds.
The symbol lights up when the summer
mode is turned on.
8.7. TURNING AUTOMATIC MODE ON/OFF
Once the automatic mode has been activated, the ventila-
tion system can be controlled using one of the following
options:
• Control of sensor
− Activated humidity sensor, see page 19,
− Activated VOC sensor (optional accessory), see page
20 or
− activated 0-10 V signal (optional accessory), see page
22.
• Weekly programme set, see page 26.
• Combination of sensor control and setting of weekly
programme 3, see page 26.
NOTE
A combination with a sensor is only possible with the
weekly programme 3.
Press symbol for about 5 seconds.
When automatic modes is on, the symbol is
lit.
8.8. ANTI-FREEZE FEATURE
Without installing an optional pre-heater module, the an-
ti-freeze feature serves to protect the ventilation system
from freezing. In this process, the air intake fan switches
itself off.
The symbol is lit while the anti-freeze
feature is activated.
Summary of Contents for NEMBUS 210
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