Danfoss ECL Comfort 110 User Manual, Installation & Maintenance page 9

B: Reference room temperature control
Used if your heating system is not equipped with thermostats and you select the room
with room temperature sensor as a temperature reference for the rest of the rooms.
Set a positive value for the 'Gain - min.' and a negative value for the 'Gain - max.'.
Influence
The room temperature sensor in the reference room measures the actual room
temperature.
If a difference occours between the actual and the desired room temperature, the
desired flow temperature can be corrected. The correction is based on the settings in
the lines 3182 and 3183. This correction of the desired flow temperature will normally
give a correct room temperature. See also line 3015.
Example B1
The actual room temperature is 2 degrees too low.
The 'Gain - max.' is set to -3.5.
The 'Gain - min.' is set to 2.0.
The 'Slope' is 1.8.
Result:
The desired flow temperature is changed by 2 x 2.0 x 1.8 = 7.2 degrees.
Example B2
The actual room temperature is 2 degrees too high.
The 'Gain - max.' is set to -3.5.
The 'Gain - min.' is set to 2.0.
The 'Slope' is 1.8.
Result:
The desired flow temperature is changed by 2 x (-3.5) x 1.8 = -12.6 degrees.
16 VI.KT.G2.02
'Gain - min.' (min. limitation)
Desired room temperature
Actual room temperature
'Gain - max.' (max. limitation)
© Danfoss 05/2007 DH-SMT/DK
This limitation is based on a PI regulation where P (Gain) responds quickly to deviations
and I (Intgr. time) responds slower and over time removes the small offsets between the
desired and actual values. This is done by changing the desired flow temperature.
Intgr. time (time constant for room temp.)
Setting range
OFF / 1 ... 50
Controls how fast the room temperature adapts to the desired room 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.
Gain - max. (room temp. limitation, max.)
Setting range
-9.9 ... 0.0
Determines how much the flow temperature will be influenced (decreased) if the room temperature is
higher than the desired room temperature (P control).
-9.9: The room temperature has a big influence.
0.0: The room temperature has no influence.
Gain - min. (room temp. limitation, min.)
Setting range
0.0 ... 9.9
Determines how much the flow temperature will be influenced (increased) if the room temperature is
lower than the desired room temperature (P control).
0.0: The room temperature has no influence.
9.9: The room temperature has a big influence.
VI.KT.G2.02
DH-SMT/DK
3015
Factory setting
OFF
3182
Factory setting
-4.0
3183
Factory setting
0.0
© Danfoss 05/2007
17