Direct Digital Controller
88 Direct Digital Controller fw 4.013 – Ed. 01/2013
4 - Select “Plants” from the drop-down menu.
5 - Select
for two-line cooling/heating plants, for hot water production plants.
6 - Turn the knob to scroll the cursor downward until highlighting “Splitt.Plant Part” and press the knob.
7 - Turn the knob to scroll the cursor downwards until “Set point Range” is selected, and press the knob to
access the screen.
8 - Position the cursor on the temperature value to be modified.
9 - Press the knob to allow the change of the selected value.
10 - Turn the knob to modify the value.
11 - Press the knob to confirm the set value.
12 - To exit, select
.
If the DDC is the Master DDC for two plants, repeat steps 5 to 9 for the second plant.
4.4.2.5.3 Water Differential
The screen shows the differential set on the set point temperature of the
separable plant for the production of DHW.
Configuration of differential
To set the value or values of the differential, proceed as follows.
1 - Select
from the initial screen to gain access to the main menu.
2 - Select
to gain access to the System installation.
3 - If required, enter the installer password on the numerical keypad that appears on the display.
4 - Select “Plants” from the drop-down menu.
5
- Select the plant for which the differential is to be set: for two-line cooling/heating plant; for
the hot water production plant;
6 - Turn the knob to scroll the cursor downward until highlighting “Splitt.Plant Part” and press the knob.
7 - Select “Wat.Differential” from the drop-down menu.
NOTE
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