Example
The return limit is active below 50 °C.
The influence is set to -3.0.
The actual return temperature is 2 degrees too low.
Result:
The desired flow temperature is changed by -3.0 x 2 = -6.0 degrees.
Normally, the setting in line 4036 is 0 in district heating systems because a lower return
temperature is acceptable.
Typically, the setting in line 4036 is higher than 0 in boiler systems to avoid a too low return
temperature (see also line 4035).
Intgr. time (time constant for return temp. limitation) 4037
Setting range Factory setting
OFF / 1 ... 50 25 sec.
Controls how fast the return temperature adapts to the desired return temperature (I control).
OFF: The control function is not influenced by the ‘Intgr. time’.
1: The desired temperature is adapted quickly.
50: The desired temperature is adapted slowly.
Priority (priority for return temp. limitation) 4085
Setting range Factory setting
ON / OFF OFF
Choose whether the return temperature limitation should overrule the set min. flow temperature
‘Temp. min.’ (line 2177).
ON: The min. flow temperature limit is overruled.
OFF: The min. flow temperature limit is not overruled.
Auto-reduct (setback temp. dependent on outdoor temp.) 5011
Setting range Factory setting
OFF / -29 ... 10 °C -15 °C
Below this outdoor temperature, the setback temperature setting has no influence.
-29 ... 10:
The setback temperature depends on the outdoor temperature, when
the outdoor temperature is above the set limit. The lower the outdoor
temperature, the less the temperature reduction. When the outdoor
temperature is below the set limit, there is no temperature reduction.
OFF: The setback temperature does not depend on the outdoor temperature.
Reduction
Outdoor
temp. °C
Setting line 5011
Boost 5012
Setting range Factory setting
OFF / 1 ... 99% OFF
Shortens the heating-up period by increasing the desired flow temperature by the percentage you set.
Set the percentage at which you want the desired flow temperature increased
temporarily.
In order to shorten the heating-up period after a setback temperature period, the
desired flow temperature can be increased temporarily (max. 1 hour). At optimizing the
boost is active in the optimization period (line 5014).
If a room temperature sensor or a room panel / remote control is connected, the boost
stops when the room temperature is reached.
Optimize 5000
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