Direct Digital Controller
Direct Digital Controller fw 4.013 – Ed. 01/2013
47
3.4.1.3.2 Differential
This parameter must be set for the “
ExtT
” (external temperature).
This screen shows the differential value set for heating and/or cooling
operation according to the type of plant configured.
Setting the differential
To set the external air temperature differential value or values, proceed as follows.
1 - Select from the initial screen to access the main menu.
2 - Select
to access the “User settings” menu.
3 - Enter, if requested, the user password on the numerical keypad that appears on the display;
4 - Select “Plants” from the drop-down menu.
5 - Select the appropriate icon:
for two-line cooling/heating plant;
for the hot water production
plant;
for the chilled water production plant.
6 - Setup” from the drop-down menu.
7 - Select “Differential” from the drop-down menu.
8 - Position the cursor on the value to be modified (Cooling and/or Heating).
9 - Press the knob to allow the change of the selected value.
10 - Turn the knob to modify the differential value.
11 - Press the knob to confirm the set value.
12 - To exit, select
.
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