Buderus RC35 - Reduction Modes (Night Setback)

Entering system settings (Service menu – Settings)
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RC35 programming unit - Technical specifications are subject to change without prior notice.
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perature (Fig. 6, right). It can be advisable to set an offset if, for example, the room tem-
perature measured with a thermometer differs from the set target value.
Fig. 6 Setting the heating characteristic curve. Left: setting the gradient by means of
standard temperature and minimum outside temperature. Right: parallel shift
possible by means of offset or target room temperature
T
minA
Minimum outside temperature
T
A
Standard temperature (i.e. the design temperature – the flow temperature which should be reached
when outside temperature is at minimum)
1 Setting: standard temperature 75°C, minimum outside temperature -10°C (base curve)
2 Setting: standard temperature 75°C, minimum outside temperature -20°C
3 Setting: standard temperature 50°C, minimum outside temperature -10°C
4 Setting: minimum flow temperature 35°C
5 Setting: standard temperature 75°C, minimum outside temperature -10°C (base curve)
6 Parallel shifting of base curve by changing the offset +3 or by increasing the target room temperature
7 Parallel shifting of base curve by changing the offset -3 or by reducing the target room temperature
6.3.4 Reduction modes (night setback)
There are a number of different reduction modes available, which allow night setback to
be adjusted to suit the differing needs of the user:
– Reduced operation: The rooms are maintained at a reasonable temperature by con-
stant heating operation (the heating circuit pump runs constantly). A target room tem-
perature for nighttime can be set. This must be at least 1 K lower than the daytime
target room temperature. The heating characteristics will be calculated in accordance
with this setting.
This setting is recommended for underfloor heating.
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T
minA
T
A
T
A
T
minA