Room Limit - Danfoss ECL Comfort 210 Installation Manual

Installation Guide

5.2 Room limit

This section is only relevant if the A214 application works with
room temperature signal (a room temperature sensor or a Remote
Control Unit) is used. The applications are: A214.1, A214.3, A214.5,
A314.2 and A314.3.
The controller adjusts the desired flow / duct temperature to
compensate for the difference between the desired and the actual
room temperature.
If the room temperature is higher than the desired value, the
desired flow temperature can be reduced.
The 'Infl. -max.' (Influence, max. room temp.) determines how
much the desired flow temperature should be reduced.
Use this influence type to avoid a too high room temperature.
If the room temperature is lower than the desired value, the desired
flow temperature can be increased.
The 'Infl. -min.' (Influence, min. room temperature) determines
how much the desired flow temperature should be increased.
Use this influence to avoid a too low room temperature. The
controller will allow for free heat gains, i.e. solar radiation etc.
A typical setting will be -4.0 for 'Infl. -max.' and 4.0 for 'Infl. -min.'
Infl. - max. (room temp. limitation, max.)
Circuit
1
Determines how much the desired flow / duct temperature at S3 will be
influenced (decreased) if the actual room temperature is higher than the
desired room temperature (P control).
-30.0:
The room temperature has a big influence.
-2.0:
The room temperature has a minor influence.
0.0:
The room temperature has no influence.
86 DEN-SMT/DK
ECL Comfort 210 / 310, application A214 / A314
11182
Setting range Factory setting
–30.0 ... 0.0 -2.0
Influence
The 'Infl. - max.' and 'Infl. - min. ' determine how much the room
temperature should influence the desired flow / duct temperature.
If the 'Infl. ' factor is too high and / or the 'Adapt. time' too low, there is
a risk of unstable control.
Example 1:
The actual room temperature is 2 degrees too high.
The 'Infl. - max. ' is set to -4.0.
The 'Infl. - min. ' is set to 3.0.
Result:
The desired flow / duct temperature is decreased by 2 x -4.0 = 8.0
degrees.
Example 2:
The actual room temperature is 3 degrees too low.
The 'Infl. - max. ' is set to -4.0.
The 'Infl. - min. ' is set to 3.0.
Result:
The desired flow / duct temperature is increased by 3 x 3.0 = 9.0
degrees.
VI.GU.A1.02
'Infl. - min.' (min. limitation)
Desired room temperature
Actual room temperature
'Infl. - max.' (max. limitation)
Danfoss District Energy