Direct Digital Controller
Direct Digital Controller fw 4.013 – Ed. 01/2013
65
For category 1 (chillers and heat pumps) the pre-set value that cannot be modified is 17 kW.
For each of the categories 4-5-6-7 (third party chillers) the value that can be set by the installer is from 1 to
1680 kW.
For category 1 the default value is 6, for categories 4-5-6-7 it is 3.
For all categories the switch on priority can be freely set in the complete range between 0 and 6; therefore it is
possible to set any switch on order for the Robur and third party units. Please note that it is possible to assign
the same switching on priority to several categories; as in the heating mode, the DDC will maintain a balanced
operating time for machines belonging to a given category and those belonging to equal priority categories.
Default values of the parameters and indications for correct choice of their values (category 1)
Default values
Parameter
Category 1 value
Recommended setting
Machine power
17 kW
Not modifiable
Priority
6
Set a value from 0 to 6
Prevention time
7 minutes
Use default values
Mi. switch-on time
10 minutes
Use default values
Number of stages
10
Use the maximum value possible for
the number of machines present
Enable integral
6 °C * minutes
(10,8 °F * minutes)
Disable integral
8 °C * minutes
(14,4 °F * minutes)
Use the semi automatic configuration
(paragraph 4.4.2.6.4 Regulation
parameters on page 96) , which
calculates the value of these
parameters according to the other
data set for all categories; the
calculation is made when exiting the
configuration panel
Table 3
- REGULATION PARAMETER DEFAULT VALUES CONDITIONING SERVICE (categories 1)
Default values of the parameters and indications for correct choice of their values (categories 4 - 7)
Default values
Parameter
Value of Categ. 4 - 7
Recommended setting
Machine power
17 kW
Set the power value in kW of the single
machine belonging to the category
Priority
3
Set a value between 0 and 6
Prevention time
7 minutes
Set a value suited to the type of
machine used
Minimum activation time
10 minutes
Set a value suited to the type of
machine used
Number of stages
10
Use the maximum value possible for the
number of machines present
Enable integral
6 °C * minutes
(10,8 °F * minutes)
Disable integral
8 °C * minutes
(14,4 °F * minutes)
Use the semi automatic configuration
(paragraph 4.4.2.6.4 Regulation
parameters on page 96) , which
calculates the value of these parameters
according to the other data set for all
categories; the calculation is made when
exiting the configuration panel
Table 4
- REGULATION PARAMETER DEFAULT VALUES CONDITIONING SERVICE (categories 4 - 7)
For the qualitative guide lines for integral modifications on the basis of observations of the behaviour of system
regulation, refer to that said for the heating mode (see 4.3.1 “Heating service” on page 57).
Third party chiller water pump delay
Similarly to heating mode, only for categories 4, 5, 6 and 7, for third party chillers, this parameter is also
present. For a given category, the parameter is present when assigned to chillers with dedicated water pumps
controlled by the Robur system; this has the purpose of establishing the switch off delay for this type of water
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