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The characteristic curve of the 0-10 V signal as a function of the boiler set tem-
perature are defined by means of 2 set points according to the specifications of
the boiler manufacturer. At a temperature of Tset 1, the voltage signal of the heat
generator is Volt 1. At a temperature of Tset 2, the voltage signal of the heat
generator is Volt 2. The controller automatically calculates the characteristic curve
resulting from these values.
Voltage signal in V
Tset 1
Tset 2
Tmin
Volt 2
Volt 1
0V
10V
Tmax
Boiler set temperature in °C
By means of the adjustment channels Tmax and Tmin the maximum and mini-
mum limitations for the boiler set temperature can be defined.
The value
∆
Tflow will be automatically added to the boiler set temperature in
order to compensate for e. g. the heat loss in the pipes.
When the Sensor flow option is activated, the controller will monitor whether
the heat generator actually reaches the desired set temperature and will, if nec-
essary, adjust the voltage signal accordingly. In order to do so, the controller will
check the temperature at the boiler flow sensor when the Interval has elapsed. If
the temperature measured deviates from the boiler set temperature by more than
the Hysteresis value, the voltage signal will be adapted by the Correction value.
This process will be repeated until the temperature measured is identical to the
boiler set temperature.
When the Min. runtime option is activated, a Minimum runtime can be ad-
justed for the demand.
Note:
If the 0-10 V demand is used for DHW heating, the voltage signal will
always be identical to Tmax.
In this menu, up to 2 heating demands can be activated and adjusted.
Activated demands will be available for selection in the output alloca-
tion channels of the backup heating in heating circuits and heating op-
tional functions. This way, several heating circuits and optional functions
can demand the same heat source.
Every demand can be carried out by means of a relay and/or a 0-10 V output. If both
the Relay and the 0-10 V option are activated, the demand will use both outputs
in parallel.
Relay option
If the Relay option is activated, the sub-menu Relay appears, in which a relay can
be allocated to the demand.
The options Boiler protection min and Boiler protection max can be acti-
vated for the demand, allowing temperature-dependent control of the boiler de-
mand. For this purpose, a boiler sensor (Sensor boiler) is required.
The Boiler pr. min option is used for protecting an older type boiler against cool-
ing. If the temperature falls below the adjusted minimum temperature, the allocated
relay is energised until the minimum temperature is exceeded by 2 K.
The Boiler pr. max option is used for protecting an older type boiler against
overheating. If the adjusted maximum temperature is exceeded, the allocated relay
is switched off until the temperature falls by 2 K below the maximum temperature.
Example:
The potential-free relay R5 can be allocated to the demand. R5 will then become
available for potential-free boiler demand in the heating circuits and e. g. the DHW
heating function.
0-10 V option
If the 0-10 V option is activated, the sub-menu 0-10 V will appear, in which a 0-10 V
output can be allocated to the demand.
With this option, the controller can demand modulating heat generators equipped
with a 0-10 V interface.
Содержание BW/H Komfort HE
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