Fancom LUMINA 16, Installation Manual

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Lumina 16 Explanation control functions
5
Transition Natural ventilation → Power ventilation (1)
With falling temperatures the control computer switches over to low ventilation when the curtains are open
minimum and the temperature falls below
Natural start (1). The inlets for natural ventilation (curtains) are closed.
The inlets for mechanical ventilation are opened and the required fans are activated according to the values in the
combi-table.
Minimum wait time
Enter a minimum wait time to prevent continuous switching to natural ventilation (yo-yo effect). If a ventilation
transition is required, the control computer will wait this time before making a new transition. Within this time the
controller cannot go back to natural ventilation.
Controlling the air inlets during natural ventilation
The air inlets open or close when the temperature differs from Setpoint Natural .
If the temperature is higher than Setpoint N Hysteresis , the inlets will open. If the temperature is lower
than Setpoint Natural
– Hysteresis
, the air inlets will close (hysteresis is preset to 0.2°C).
The extent of inlet control depends on the difference between measured temperature and Setpoint Natural . The
greater the difference, the longer the inlets will be opened or closed. Closing until the inlet position is equal to the
setting
Minimum % (Natural) . Opening until the inlet position is equal to the setting Maximum % (Natural) .
Control speed Natural :

Slow = 120 sec

Moderate = 60 sec

Fast = 30 sec
Example
Setpoint Natural is 20.5 °C (Hysteresis is 0.2).
If the measured house temperature is between 20.3 °C and 20.7 °C, the inlet positions will not be
corrected.
Inlets will be closed if the temperature is equal to or lower than 20.2 °C. Inlets will be opened if the
temperature is equal to or higher than 20.8°C.
During the natural ventilation the ventilation would be controlled by the natural inlets.
Depending on the chosen house type the other inlets ( Minimum and Tunnel ) will (not) follow the natural inlets.
The control computer supports four types of house ventilation:

Cross : With side ventilation the house is ventilated on the side. One side is the air inlet, the other side the air
outlet. The air flows across the house sideways. The inlet can be a minimum air inlet system or a natural
curtain. The outlet is mechanical (fan).

Stair : With cross ventilation the house is ventilated from both sides. However, in this case the house is
divided into various sections in which ventilation comes from opposite directions.

Ridge : With ridge ventilation the air enters the house from both sides and is exhausted via ridge ventilation.

Length : With length ventilation the air enters the house from both sides and is exhausted via end wall
ventilation.