Direct Digital Controller
Direct Digital Controller fw 4.013 – Ed. 01/2013 85
Repeat steps 5 to 8 for the second plant if the DDC is the Master DDC for two plants. In this case the two
plants can have different settings.
4.4.2.3 Partial operation mode (Master DDC of Multi DDC plants only)
This option allows the user to select the control mode for switching on the units if one or more Slave DDCs are
off.
Two choices are possible:
Disable the operation of the whole plant if one or more Slave DDCs are off (option disabled);
Allow operation of the part of the plant that is controllable if one or more Slave DDCs are off (option
enabled).
If the Master DDC is off, the whole plant is deactivated.
To set “Partial operation Mode”, follow the instructions below:
1 - Select
from the initial screen to gain access to the main menu.
2 - Select
to gain access to the System installation.
3 - Enter the installer password, if requested, on the numerical keypad that appears on the display.
4 - Select “Plants” from the drop-down menu.
5 - Select the
symbol for two-line cooling/heating plants, for hot water production plants, or
for chilled water production plants.
6 - Turn the knob to scroll the cursor downwards until “Partial operation mode” is selected and press the
knob to access the screen.
7 - Position the cursor on
and press the knob to make the selection. The symbol indicates that the
option has been enabled (the partial plant operates also when the Slave DDCs are off).
8 - To exit, select
.
Repeat steps 5 to 8 for the second plant if the DDC is the Master DDC for two plants. In this case the two
plants can have different settings.
NOTE
NOTE
NOTE
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