3064458_201811
41
17. Parameter description
If the heating curve is greater than
0
, the heating flow temperature setting at
keys 6 and 7 is disabled. In this scenario, key 6 (-) and key 7 (+) serve to set
the temperature correction (±4) for the heating circuit.
If the appliance is connected to a BM-2, the operating mode key is
disabled. The BM-2 takes over this function.
The setting is made by the heating contractor for each heating circuit separately,
subject to the heating system, the thermal insulation of the building and the
relevant climate zone.
Setting the slope will match the heating water temperature to these
conditions.
For setting with BM-2, see BM-2 installation instructions.
The following diagram shows an example applicable to the following heating
system:
- Climate zone with an average minimum outside temperature of -14 °C
- Radiator for flow/return temperatures 60/50 °C, with direct control
- Thermal building insulation in accordance with current regulations
For all other conditions, match the slope to the prevailing circumstances.
The slope must always be set so that, at the min. outside temperature, the
maximum flow temperature for the radiators or the underfloor heating system
will be achieved.
As rule of thumb, a slope of 9 can be used for a radiator heating system, and
a slope of 3 for underfloor heating systems in a well insulated house. In a less
well insulated house, a slope of 12 can be used for a radiator heating system,
and a slope of 6 for underfloor heating systems.
Parameter H54
Heating curve
Factory setting: see table
Setting range: 0 to 30
Individual setting:
_____
Sample setting:
Gradient 12
Climate zone -14 °C
Flow temperature 60 °C
Outside temperature [°C]
Gradient
Flow temperature [°C]
-14 °C
Climate zone
Calculation of temperature selection -4...+4:
Flow temperature (correction) =
Flow temperature in accordance with heating curve + (H54 set value / 2.5) x temperature correction (+/-4)
According to the heating curve, an outside temperature of -10 °C
results in a flow temperature of 65.6 °C in heating mode.
= 56 °C + ((12/2.5)x2) K
= 56 °C + (4.8x2) K
= 56 °C + 9.6 K
= 65.6 °C
Example: temperature corr2
60 °C
