Lumina 38
Explanation control functions
14
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).
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
Setpoint
+ 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.
Summary of Contents for LUMINA 38
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