oventrop Regtronic RH HT, Installation And Operating Instructions For The Specialised Installer, Page: 20 / 56

20
Installation
Commissioning
Settings
Data comm
unication
Tr
oubleshooting
en
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.
Example:
The potential-free relay R5 can be allocated to the shared relay Demand 1. R5
will then become available for potential-free boiler demand in the heating circuits
and e. g. the DHW heating function.
S3
S2
S1
R1
R2/3
R4
S4
R5
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.
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.
Spannungssignal in V
10V
Volt 2
Volt 1
0V
Tmin
TSoll 1 TSoll 2
Tmax
Kesselsolltemperatur in °C Set boiler temperature in °C
Voltage signal in V
By means of the adjustment channels Tmax and Tmin the maximum and mini-
mum limitations for the boiler set temperature can be defined.
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.
Pump
For loading pumps, the shared relays Pump 1 and Pump 2 are available. Con-
cerning a demand, the options Start-up and Overrun can be activated for the
shared relays. The demand can either be time- or temperature controlled. For
temperature-dependent control an allocated boiler sensor is required.