35
To reach the menu for making these adjustments starting from the default display,
press “OK” and select “
domestic hot water (DHW
)” using “DOWN”. Enter the
menu using “OK” and then select “
setpoints
” and press “OK”. This menu contains all
parameters required for the occupation (SP-OTx) and non-occupation times.
3.3.5 Heating Circuits – Setpoints, heating curve, setpoint
limitation
After loading the system diagram, the HPM will automatically configure the
parameters in the heating circuit for weather-dependent flow temperature calculation
for underfloor heating systems. Therefore, a flat
heating curve
has been chosen
(Slope:
hCu-slope
= 0.5), along with a small
exponent
(radiator exponent:
hCu-exp
= 1.10) and a comfortable
base point
(
basepOTx
= 22°C). These parameters can be
found in the menu “heating circuits / heating circuit x / setpoints”.
To reach the menu in order to make adjustments, press “OK” (starting from the
default display) select “
heating circuits”
with “DOWN” and enter the menu using
“OK”. In the next menu, the heating circuit will likely have to be selected. Select
“
setpoints
” with “DOWN” and enter the menu using ”OK”. This menu contains all
parameters needed for the heating curve.
For alternative heating systems, the following adjustments must be made:
Heating system
Heating curve slope
Radiator
exponent
underfloor heating (up to 35°C)
0.2 (flow 29°C for outd.temp -10°C)
0.3 (flow 32°C for outd.temp -10°C)
0.4 (flow 35°C for outd.temp -10°C)
1.10
low temperature radiators (up to 45°C)
0.5 (flow 38°C for outd.temp -10°C)
0.6 (flow 41°C for outd.temp -10°C)
0.7 (flow 44°C for outd.temp -10°C)
1.20
radiators and plate radiators
(up to 55°C)
0.8 (flow 48°C for outd.temp -10°C)
0.9 (flow 51°C for outd.temp -10°C)
1.0 (flow 55°C for outd.temp -10°C)
1.20 – 1.40
DIN: 1.33
convectors (up to 65°C)
1.1 (flow 58°C for outd.temp -10°C)
1.2 (flow 61°C for outd.temp -10°C)
1.3 (flow 65°C for outd.temp -10°C)
1.40 – 1.66
Table 3.3: Overview heating systems / heating curve
When selecting a heating curve >0.5, the function “
summer shutdown
” will be
automatically set to type=2 (3-day caretaker). This means that the outdoor
temperature has to be above the set threshold for 3 days in a row before the heating
goes into “summer shutdown” mode. The same applies if the outdoor temperature
falls below the switch-on threshold. The parameter “
type
” can be manually set to
“1=comfort caretaker”, in the menu “
heating circuits / heating circuit x / functions /
summer shutdown
”, if it is desirable that the summer shut-down should react
immediately.
A graph of the most commonly used heating circuits is contained in the appendix of
this manual.
Depending on the design of the heating system and the materials used in it, it might
be necessary to set a setpoint limitation. This function ensures the flow temperature
will not exceed a set maximum temperature (limitation), regardless of the selected
heat curve. The parameters for this function can be activated and set in the menu
“
heating circuits, heating circuit x / functions / setpoint limitation
”. The
parameters “
maxFl
” and “
maxDemFl-T
” affect the setpoint limitation (maximum
calculated flow temperature) and the demand limitation (maximum demanded flow
temperature).
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