11
USER AND SAFETY INSTRUCTIONS
iV-Office ventilation device
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Installation and operating instructions
2.2
Function
The iV-Office ventilation unit is used to provide ventilation for living spaces and living space-like
commercial premises. An integrated ceramic thermal accumulator ensures optimum heat recovery.
The ventilation device 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 indoor air as it flows to the exterior (extract air). After
70 seconds, the Xenion EFP reversible fan changes direction.
When the fan changes direction, it releases the stored heat
energy into the incoming outdoor air (supply air).
For this principle to work correctly and to ensure pressure stability in the room, the supply air
volume must always correspond to the extract air volume, i.e. at least two ventilation devices
are required. These are operated in pairs in push-pull mode: Another ventilation device is assigned
to the ventilation device that delivers supply air and at the same time removes used extract air
from the interior to the outside.
The patented sound insulation concept of iV-Office is based on the combination of the sound
insulation lining made of Inventin with the Xenion EFP reversible fan. The sound insulation
lining effectively absorbs sound waves from outside and from the device itself (sound transmission
and inherent sound). The arrangement and design of the fan blades additionally reduces
the sound transmission from outside.
Thanks to a high pressure build-up and the active speed control of the motor (integrated wind
pressure stabiliser) in the Xenion EFP reversible fan, the air flow in the system is kept almost
constant even in the event of weather-related pressure fluctuations. Thus, the sensitivity
of the air flow to pressure fluctuations corresponds to class S2 according to DIN EN 13141-8
(max. 20 % air flow deviation at ± 20 Pa).
In order to ensure the full functioning of the ventilation device throughout the entire year,
a temperature sensor is integrated into the Xenion EFP 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 supply air. During this phase,
the operating mode that has been set on the controller is ineffective. Subsequently,
the controller switches the ventilation device back to the originally selected mode.
As standard, a washable class G4 dust filter is unobtrusively and easily accessible integrated
into the inner cover. This filters coarse dust and allergenic particles (such as coarse flower pollen)
from the air before they can enter the interior. The dust filters can be used regardless of the
season. Optional pollen and activated carbon filters are available for special requirements.
A decentralised ventilation unit is based on the free movement of air between individual pairs
of ventilation devices. Therefore, internal doors must not have air-tight seals. Provide suitable
air transfer measures to create a room network (cross ventilation).
Supply mode
Extract mode
70 s
