Robur Direct Digital Controller - Page 93

Direct Digital Controller
Direct Digital Controller fw 4.013 – Ed. 01/2013 91
RB100/RB200
Take care not to confuse this parameter with the "Water pump delay" parameters which may be present in
the regulation parameter settings panel of various categories of units (see Third party boiler water pump
delay on page 63 and Third party chiller water pump delay on page 65): these parameters are in fact used to
set the switch-off delay of water pumps dedicated to third party units, if present and controlled by the Robur
system.
4.4.2.5.6 Switching-over step timing
This option permits to set the values concerning the times to be met during the switching-over step of the
three-way deviation valves that separate the separable plant from the base plant. In particular what follows
shall be set:
- Mach. time OFF: indicating the time in which the machine are off while the valves are switching over
(used during both the separation step and the inclusion to the base plant);
- Average insert. add. delay of sep. plant. (inclusion phase): indicating how much time shall elapse
after the inclusion step of the separable group units to the base plant, in order to consider the
delivery and return temperature of the machine just included in the total average value of the plant.
To set above-said value, operate as described below:
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 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 - Turn the knob to scroll the cursor downward until highlighting “Commut.Phase Timng” and press the
knob.
8 - Place the cursor on the value to be edited; the value is expressed in seconds.
9 - “Units OFF time” can be set between 0 and 600 seconds.“Split Plt Added To Avg Addit.
10 - Delay” can be set from 0 to 300 seconds.
11 - Press the knob to allow the change of the selected value.
12 - Turn the knob to modify the value.
13 - Press the knob to confirm the set value.
14 - To exit, select
.