5.1.2 Settings for direct heat distribution
System menu
Environment
Settings
for direct heat distribution
Pump operation when boiler off
If pumps are not active for a longer period of time (e.g.
heating circuit pumps during the summer), these can be
activated briefly to prevent a higher degree of wear. This
parameter specifies on which day of the week all pumps
that are not active should be started up.
Start time of pumps when boiler off
This parameter specifies at what time all pumps that are
not active should be started up. At this time, the pumps will
be started up in order based on the defined time.
Duration of pump operation when boiler is off
This parameter specifies the duration for which all pumps
that are not active should be started up.
Enable heating circuit
Defines the boiler temperature starting from which the
heating circuit pumps are released. The value applies for
all heating circuits assigned to the boiler.
5.1.3 Storage tank
System menu
Storage tank
Environment
Loading temperature minimum difference for storage tank
charge
Minimum temperature difference between boiler and
distributor storage tank from when the storage tank is
loaded.
Storage tank minimum temperature top
Minimum temperature in storage tank (top store sensor),
from which the boiler is started for storage tank loading.
Storage tank PI controller Kp
Defines the gain factor of the PI controller. The higher the
value is set, the more sensitive the controller reacts.
Storage tank PI controller Tn
Defines the reset time of the PI controller in seconds.
Storage tank loading setpoint at +10°C
Defines the required storage tank charge in percent when
the external temperature is -10°C. The PLC calculates the
current storage tank charge setpoint in conjunction with
the “Storage tank loading setpoint at -10°C” parameter
according to the external temperature. It must be taken
into account that 0% corresponds to the minimum storage
tank charge. If, for example, the “Storage tank loading
Storage tank loading setpoint at +10°C
setpoint at +10°C" parameter is set to 0%, this does not
mean 0% storage tank charge, but the specified minimum
storage tank charge. This removes the possibility of the
storage tank charge being set lower than the minimum
storage tank charge.
Storage tank loading setpoint at -10°C
Defines the required storage tank charge in percent when
the external temperature is -10°C. The Lambdatronic
calculates the current storage tank charge setpoint in
conjunction with the “Storage tank loading setpoint at
+10°C” parameter according to the external temperature.
Storage tank max. loading setpoint
The parameter specifies the maximum storage tank
charge. This is never exceeded; even if the “Storage tank
loading setpoint at -10°C” parameter would produce a
higher value.
Storage tank min. loading setpoint
The parameter specifies the minimum storage tank
charge. This is never exceeded; even if the “Storage tank
loading setpoint at +10°C” parameter would produce a
lower value.
Menus and parameters
5
Environment
Service manual SPS 4000 | B0960622_en
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