Direct Digital Controller
Direct Digital Controller fw 4.013 – Ed. 01/2013 127
The figure on the right shows the on/off commands active for MAN
operating mode. The symbol, next to the text description of the
command, indicates that the command is enabled. The MAN operating
mode allows 4 commands to be enabled:
GenPwr Plant master switch for switch-on and switch-off
GrpPwr Partial plant on/off switch (Multi DDC plants only);
GenTmr General water T timer on/off command;
GrpTmr Partial water T timer on switch (Multi DDC plants only);
The on/off commands present in MAN operating mode are predefined and may not be modified. In any case, it
is possible to exclude some of them via the buttons contained in the “Plant control” menu.
When plant configuration is complete, it is always necessary to set the following parameters:
Default set point see paragraph 3.4.1.1.1.1 on page 31;
Water Differential see paragraph 4.4.2.6.1 on page 93 and, for separable plants, paragraph 4.4.2.5.3 on
page88;
Regulation parameters see paragraph 4.4.2.6.4 on page 96 and, for separable plants, paragraph
4.4.2.5.4 on page89;
In the presence of third party boilers:
Auxiliary boiler operation see paragraph 4.4.2.6.2 on page 94;
Rated plant power see paragraph 4.4.2.6.3 on page 95;
In the case of common water pumps managed by RoburBox:
RoburBox water pump delay see paragraph 4.4.2.6.5 on page98 and, for separable plants,
paragraph 4.4.2.5.5 on page90;
General water T timer see paragraph 3.4.1.1.1.3 on page 34 (optional);
Partial water T timer see paragraph 3.4.1.1.1.4 on page 35 (optional, Multi - DDC plants only).
Enabling the General water T timer substitutes the default water setpoint value set as per Paragraph
3.4.1.1.1.1 with the specific value for the timer cycle active at any given moment.
Once user settings have been programmed, it is possible to proceed to switch-on via the “Plant control“
menu.
Activating the plant in MAN mode: Plant control
.
Before carrying out the activation of the plant, ensure that all operating parameters have been correctly
configured (water setpoint, differential, thermostating etc.).
Figure 25 illustrates the initial screen for a two-line COOLING/HEATING plant.
WARNING
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