Lumina 17
Explanation control functions
11
2.2.2
Analog control (linear)
With analog heating control the heating is controlled by a P- or PI-control. Use Repeat time to determine the type of
heating control. If the Repeat time is less than 10 seconds, a P-band control is concerned. In other cases PI-control
applies.
P-control
If the temperature is higher than the Control value,
heating is on the minimum position. The minimum position
is a user setting.
If the temperature is between the Control value and
Control value P-band, heating will be at a position
between minimum and 100%, depending on the
difference.
As long as the measured house temperature is lower than
Control value - P-band the control computer will output the
maximum control signal.
The P-band is a user setting.
PI control
If the temperature is lower than the Control value, the control computer will control the heating directly based on
the temperature difference. As long as the temperature is too low, the heating will go to an increasingly higher
position (max. 100%). The increase/decrease speed depends on the time set by the user (usually between 100
and 600 seconds).
2.3
Cooling
The control computer can be used to control a cooling unit. Enter to which analog inputs the temperature sensor(s)
have been connected and to which relay the cooling has been assigned. Also enter the type of relay control:
ON/OFF
or
MODULATING
. The type of control depends on the chosen cooling system.
With evaporative cooling you can use the
Max. RH limit with evaporative cooling.
This influence is explained in the
user's manual.
The control computer can use a hysteresis. This prevents the cooling being activated or deactivated with slight
temperature fluctuations. The control computer activates the cooling if the house temperature rises above the
hysteresis. If the house temperature drops, the cooling will stay on until the house temperature has dropped below
the setpoint cooling. If a evaporative cooling is selected the control is explained in the user's manual.
The ON/OFF control and the time modulating ON/OFF control to control the cooling are explained here:
ON/OFF control
Cooling activates if the house temperature is higher than
Se
hysteresis
.
Cooling deactivates if the temperature is equal to or lower than
Setpoint
.
A
Repeat time
can be used to avoid unnecessary
activation/deactivation of the cooling. When the cooling activates, it
will remain on for at least the
Repeat time
. When the cooling
deactivates, it will remain off for a minimum of this time.
