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SYSTEM OVERVIEW
SYSTEM OVERVIEW
Ventilation System iV-Twin+
•
Installation and Operating Instructions
Ventilation System iV-Twin+
•
Installation and Operating Instructions
2.2
Features
The iV-Twin+ ventilation unit is used to ensure the ventilation of living spaces. It can also be
installed in classic exhaust air rooms. The integrated heat accumulator ensures optimum heat
recovery with maximum air volume flow.
As an individual room unit, the iV-Twin+ combines a supply and extract air unit in one. To
ensure that the ventilation system functions correctly and the pressure stability in the room is
guaranteed, the supply air volume must correspond to the exhaust air volume at all times. A
separating element divides the wall sleeve vertically into two airtight channels. Each channel
contains a fan unit and a semi-cylinder heat accumulator.
Due to a high pressure build-up and the active speed control of the motor (integrated wind
pressure stabilizer) in the reversing fan Mini-Xenion, the air volume flow in the system is kept
almost constant even with weather-related pressure fluctuations.
A temperature sensor is integrated in the reversing fan Mini-Xenion to ensure full functionality
of the ventilation unit throughout the year. This measures the temperature of the air volume flow
at the fan. If the temperature at the fan falls below + 5 °C, both reversing fans are automatically
switched to exhaust air operation for 4 cycles. This reheats the heat accumulator and prevents
the interior from cooling down as a result of the cold supply air flowing in. During this phase, the
operating mode set on the controller is ineffective. The controller then switches the ventilation
unit back to the originally set operating mode.
Function of the iV-Twin+ in reversing mode
In standard operation, the ventilation system works according to the principle of regenerative
heat recovery. The integrated heat accumulator is charged with the thermal energy of the room
air when it flows to the outside (exhaust air).
After 70 seconds, the reversing fan changes the direction of rotation. After changing the
direction of rotation, it releases the stored thermal energy to the fresh air supplied (supply air).
The two fans are each operated as a pair in push-pull mode: One reversing fan feeds supply
air into the interior, while the other reversing fan feeds used exhaust air out of the interior at the
same time.
Figure 2: Function of the iV-Twin+ ventilation unit in reverse mode
Function of the iV-Twin+ in exhaust air mode
If the ventilation mode is selected on the controller,
the iV-Twin+ ventilation unit operates in extract air
mode.
Both reversing fans are switched to exhaust
air operation at the same time, i.e. both fans
simultaneously convey used exhaust air from the
interior to the outside.
No heat recovery takes place in this operating
mode. It is particularly recommended for the rapid
removal of moisture and odour peaks.
The ventilation unit is operated via a controller of the inVENTer system. Depending on the
controller, you can select the various operating modes and functions in which the ventilation
unit is to be operated. We recommend using the iV-Twin+ with a separate controller sMove or,
in conjunction with the MZ-Home controller, to consider it as a separate zone. In rooms with
humidity ingress, the installation of a separate hygrostat (sMove) or humidity sensor (MZ-
Home) in the room is recommended.
Figure 3: Function of the ventilation unit
iV-Twin+ in exhaust air mode
70 s
