VI.KT.G6.02
18 | © Danfoss | 2016.05
Maintenance
Gain - max. (return temp. limitation - max. influence)
4035
Setting range
Factory setting
-9.9 ... 9.9
-2.0
Determines how much the flow temperature will be influenced if the return temperature is higher than
the desired ‘Limit’ (line 4030) (P control).
Influence higher than 0:
The desired flow temperature is increased, when the return temperature gets higher
than the set limit.
Influence lower than 0:
The desired flow temperature is decreased, when the return temperature gets higher
than the set limit.
Example
The return limit is active above 50 °C.
The influence is set to -2.0.
The actual return temperature is 2 degrees too high.
Result:
The desired flow temperature is changed by -2.0 x 2 = -4.0 degrees.
Normally, the setting in line 4035 is lower than 0 in district heating systems to avoid a too
high return temperature.
Typically, the setting in line 4035 is 0 in boiler systems because a higher return temperature
is acceptable (see also line 4036).
Gain - min. (return temp. limitation - min. influence)
4036
Setting range
Factory setting
-9.9 ... 9.9
0.0
Determines how much the flow temperature will be influenced if the return temperature is lower than
the desired ‘Limit’ (line 4030) (P control).
Influence higher than 0:
The desired flow temperature is increased, when the return temperature gets below the
set limit.
Influence lower than 0:
The desired flow temperature is decreased, when the return temperature gets below the
set limit.
