Direct Digital Controller
134
Direct Digital Controller fw 4.013 – Ed. 01/2013
The figure on the right shows the activation screen and the relative
buttons and commands that are described below.
Main ON/OFF switch; the switch is disabled in this operating mode.
Group ON/OFF switch; the switch is disabled in this operating mode.
Button for enabling/disabling General water T timer. To disable the General water T timer, i.e. not use
general timer programming (relative command always ON and default setpoint used), position the cursor
on the button and press the knob (“General water T timer” command symbol
not enabled).
WARNING:
DISABLING THE GENERAL WATER T TIMER ENTAILS AUTOMATICALLY
DISABLING THE PARTIAL WATER T TIMER (
).
Button for enabling/disabling Partial water T timer (
button disabled for plants managed by a single
DDC
).
If enabled, the specific DDC uses also the partial timer programming (see Paragraph
3.4.1.1.1.4– "Partial water T
timer
"
).
Chronothermostat button disabled (
on/off command disabled in RYWa operating mode
).
COOLING/HEATING switching button; the switch is disabled in this operating mode. The
symbol indicates the current operating mode in any case.
To access the “DHW Plant control” menu, follow the indications given below:
1 - Select the
icon from the initial screen and press the knob to gain access to the screen displaying the
operating parameters of base and separable DHW plant.
2 - Select the
symbol positioned above to gain access to the “
Base DHW plant control” menu
”.
3 - Select the
symbol positioned below to gain access to the “
Separable DHW plant control” menu
”.
4 - In both cases (“Base DHW plant control” and “Separable DHW plant control”) the screen shown in the
figure below will be displayed on the screen.
The figure shows the screen of the “DHW plant control” menu and the
relevant button described below.
Main ON/OFF switch.
Turn the knob to position the cursor on the button and press the same to
activate it (symbol of the ON/OFF button in the ON position
).
In case of Multi-DDC plant, it
is ON only on the Master DDC; on the Slave DDC(s) it reflects the ON/OFF status set on the Master.
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