Lumina 35 Explanation control functions7Extra fans can only be switched on or off via a relay. They are usually used when the controllable fans arerunning at maximum or in combination with controllable fans to achieve a gradual increase in ventilation.Figure 5: Example of an extra fan switched on and off from the control computer by a relayThe control computer determines the use of air inlets, extra inlets and fans based on the combi-table. Below is anexample of a combi-table. This may differ to your own combi-table, for example, because you use a differentnumber of extra fans. The combi-table shows the required values at successive positions (M1 thru M10 in theexample). The relay fans will do 20.000 m3 each and the controllable part is 25.000 m3.M/MT-phaseExhaust InletsCtrl.Mod.Control-lable/ExtraRelays Inlet(%)Tun(%)Press. (Pa)Cap.(m3/h)(%) 1 2 3 1 2 3 4 5 6 7 8 9 10M1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 22 250M2 20 100 0 0 0 0 0 0 0 0 0 0 0 0 0 20 0 20 25000M3 21 25 0 0 0 1 0 0 0 0 0 0 0 0 0 21 0 20 26250M4 36 100 0 0 0 1 0 0 0 0 0 0 0 0 0 36 0 20 45000M5 37 25 0 0 0 1 1 0 0 0 0 0 0 0 0 37 0 18 46250M6 52 100 0 0 0 1 1 0 0 0 0 0 0 0 0 52 0 18 65000M7 68 100 0 0 0 1 1 1 0 0 0 0 0 0 0 60 10 16 85000M8 84 100 0 0 0 1 1 1 1 0 0 0 0 0 0 80 10 14 105000M9 100 100 0 0 0 1 1 1 1 1 0 0 0 0 0 100 15 14 125000M10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0The combi-table also contains the ventilation capacity. This is used to determine the ventilation position if controlis based on ventilation capacity per hour per animal (m3/h/animal).The required pressure in the combi-table is used to control the inlet based on the under pressure in the house.See Optimisation based on pressure page 10.