9
SYSTEM OVERVIEW
iV-Smart
+
ventilation system
•
Installation instructions
2.1
Function
The iV-Smart
+
ventilation system is used to provide ventilation for living rooms and bedrooms.
An integrated thermal accumulator in combination with the Xenion reversible fan and the guid-
ing vanes ensures optimum heat recovery with maximum air flows in its class.
The ventilation unit operates on the principle of heat
recovery by changing the direction of the fan. The
integrated thermal accumulator charges itself with heat
energy from the room's air as it flows to the exterior
(extract air). After 70 seconds, each Xenion reversible
fan changes direction. When the reversible fan chang
-
es direction, it releases the stored heat energy into the
incoming outside air (supply air).
For this principle to work correctly and to ensure the
room’s pressure stability the incoming air and extract
air volumes must match, i. e. two iV-Smart
+
ventilation
units are required. These are operated in pairs in
push-pull operation: One ventilation unit works in supply air mode while the other works in
extract air mode at the same time.
Due to the Xenion reversible fan’s high pressure built-up and active speed control (integrated
wind stabiliser) the air flow within the system is kept nearly constant. Thus, the air flow
sensitivity to pressure variation meets the requirements of class S3 according to EN 13141-8
(max. 30 % air flow deviation at ± 20 Pa).
In order to ensure the full functioning of the ventilation system throughout the entire year, an
additional, flexible temperature sensor is integrated into the Xenion reversible fan.
This measures the temperature of the air flow. If the temperature falls below +5°C, the
reversible fan is automatically switched to extract air mode for 4 cycles. This allows the thermal
accumulator to heat up again and prevents cooling of the interior due to cold drafts. During this
phase, the mode that has been set on the controller is ineffective. Subsequently, the controller
switches the ventilation unit back to the originally selected mode.
A multi-use dust filter of filter class G4 is integrated discreet and easy of access into the inner
cover. It filters off reliably dusts as well as allergenic particles (such as pollen) from the ambient
air before it can enter living spaces. Dust filters are season independent. For special require
-
ments micro, pollen and activated carbon filters are available as an option.
A decentralised ventilation system is based on the free movement of air between individual
pairs of ventilation units. Therefore, internal doors must not have air-tight seals. Ensure ade-
quate air transfer measures: An air gap of about 10 mm below the door, unscrew the hinges by
5 mm, use a ventilation grille or similar (cross ventilation).
The ventilation unit is controlled via one of the inVENTer system controllers. Depending on the
controller, operating modes and functions may be selected.
70 s
