Explanation control functions
Example - Optimum modulating control (2)
Modulate below %: 30%
Control value ventilation: 3%
The control computer assumes an optimum ON-time of 2 minutes. This means that the optimum ON-
time of 2 minutes must be a tenth (=3/30) of the total cycle time. The control computer calculates a
cycle time of 10 x 2 minutes = 20 minutes (2 minutes on and 18 minutes off). However, this is longer
than the maximum cycle time of 10 minutes.
The control computer will calculate new ON- and OFF-times based on the maximum cycle time as
follows: 1/10 of 10 minutes means an ON-time of 1 minute. The rest of the time the control remains
switched off.
The fans which must activate at a certain ventilation position have been set in the relay or combi-table. However,
this means that the same fans will always be active. Using rotating the control computer will activate the number
of assigned fans, but in a different sequence each time. This creates an optimal spread of air in the house. In
addition, all fans are evenly used.
Rotating the sequence is impossible if all combi-relays (assigned for rotation) are activated.
The control computer has various heating controls that can be assigned independently.
Temperature zones in the house
A heater (blower) often only warms part of the house. It is better to divide the house into zones, and link certain
temperature sensors to the heater for this zone.
Separate setpoint heating
Usually one setpoint house temperature is used for ventilation and heating. The heating can also be given a
separate setpoint, the so-called ‘extra temperature’. The extra temperature must be entered in the curve.
This may be necessary if floor heating is controlled based on temperature. In this case, the sensor measures a
different temperature to the actual house temperature.
High/low-control heating
Heaters can be linked together. Heater 1 is always the foundation. For example, if heater 2 is linked to heater 1,
these heaters will always use the same actual setpoint. If the control value of heater 1 is changed, the control
value of heater 2 will change accordingly.
The above can also be used for low/high control. The control computer will activate the heaters one by one:
With a small difference between the control value of heater 1 and the house temperature, the control
computer will activate this heater.
As it gets colder, the difference increases. The control computer then activates extra heaters.
Enter to which analog inputs the temperature sensor(s) have been connected and to which outputs the heating
controls have been assigned. Also enter the type of control: RELAY or ANALOG. The type of control depends on
the heating system used. There are two relay controls (On/Off and modulating).
The controls used to control the heating are explained below.
To Next Page
Loading...
General