The grey
side of the
ECL Card
Basic set-up
27
Control parameters -
lines 4-7 (DHW)
Auto tuning
The auto tuning function automatically determines the
control parameters for DHW control. Thus you do not need
to set the parameter lines 4, 5, 6, and 7 in circuit II, as they are
automatically set to the auto tuning function.
Auto tuning is typically used in connection with the
installation of the controller, but it can be activated when
needed, e.g. for an extra check of the control parameters.
Before starting the auto tuning, the tapping ow should be
adjusted to the relevant value (see table below).
Recommended tapping load
No. of
apartments
Heat
transfer (kW)
Constant tapping load
(l / min)
1-2 30-49 3 (or 1 tap 25% open)
3-9 50-79 6 (or 1 tap 50% open)
10-49 80-149 12 (or 1 tap 100% open)
50-129 150-249 18 (or 1 tap 100% + 1 tap 50%
open)
130-210 250-350 24 (or 2 taps 100% open)
If possible, any additional DHW consumption should be
avoided during the auto tuning process. Should the tapping
load vary too much, the auto tuning and controller will return
to the default settings.
Auto tuning is set to ON / OFF by using the service parameter
line 173, push (ON) and (OFF). When the auto tuning
is ended, the service parameter is automatically set to OFF
(default setting). This will be indicated in the display.
The auto tuning process takes up to 25 minutes.
Important!
In order to meet the summer- / winter variations, the ECL
clock must be set to the correct date for an successful auto
tuning. The motor protection function (line 174) has to be
deactivated during auto tuning.
During auto tuning the circulation pump for tap water must
be switched o. This is done automatically if the pump is
controlled by the ECL controller.
Auto tuning is only applicable in connection with valves that are
approved for auto tuning, i.e. the Danfoss types VB 2 and VM 2
with split characteristic as well as logarithmic valves such as VF.
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