en
54
Installation
Indications,
functions and options
Messages
Commissioning
Operation and function
6.2
Adjustment channels
System selection
Arr
System selection
Adjustment range: 1 … 10
Factory setting: 1
In this channel, a pre-defined system can be selected. Each system has a set of
pre-programmed settings that can be individually changed.
If the system selection is changed later on, any previous adjustments which have
been made in the other channels will be lost. Therefore, changing the system is
always followed by a security enquiry.
Only confirm the security enquiry if you are sure that you wish to change
the system selection.
Security enquiry:
Î
In order to confirm the security enquiry, press button 3.
∆
T control
DT O / DT1O / DT2O / DT3O
Switch-on temperature difference
Adjustment range: 1.0 … 20.0 K [2.0 … 40.0 °Ra]
Factory setting: 6.0 K [12.0 °Ra]
The controller works as a standard differential controller. If the temperature reaches
or exceeds the switch-on temperature difference, the pump switches on.
When the temperature difference reaches or falls below the adjusted switch-off
temperature difference, the respective relay switches off.
Note
The switch-on temperature difference must be at least 0.5 K [1 °Ra] high-
er than the switch-off temperature difference.
DT F / DT1F / DT2F / DT3F
Switch-off temperature difference
Adjustment range: 0.5 … 19.5 K [1.0 … 39.0°Ra]
Factory setting: 4.0 K [8.0 °Ra]
Note
If the drainback option ODB is activated, the values of the parameters
DT O, DT F and DT S will be adapted to values suiting drainback systems:
DT O = 10 K [20 °Ra]
DT F = 4 K [8 °Ra]
DT S = 15 K [30 °Ra]
Adjustments that have been previously made in these channels will be
overridden and have to be entered again if ODB is deactivated later on.
Speed control
DT S / DT1S / DT2S / DT3S
Set temperature difference
Adjustment range: 1.5 … 30.0 K [3.0 … 60.0 °Ra]
Factory setting: 10.0 K [20.0 °Ra]