Direct Digital Controller
94 Direct Digital Controller fw 4.013 – Ed. 01/2013
12 - To exit, select .
4.4.2.6.2 Auxiliary boiler operation
To set the operating modes of the auxiliary boilers (only in heating or 2-line cooling/heating plant) proceed as
described below; for more information on the topic see paragraph 4.2 on page 55. and the Applications
Manual (code D-LBR630).
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 plants, for
hot water production plants, or
for chilled water production plants.
6 - Turn the knob to scroll the cursor downward until highlighting “Base plant part” and press the knob.
7 - Select "Auxil. boiler operation" from the drop-down menu.
8 - Position the cursor on
next to the option that is to be set: "Complement" or "Complem.& Substit".
9 - Press the knob to activate the option. The
symbol indicates that the option has been enabled .
10 - When the “Complem. & Substit.” function is enabled the display shows the symbol
, selecting and
pressing the knob we can enable the “Progressive substitution” function.
11 - To exit, select
.
Selecting "Progressive substitution" also required:
• Special plant configuration.
• The presence of an additional temperature probe on the return manifold of the heat pump.
• The setting of additional parameters in the regulation parameter settings panel (see 4.4.2.6.4 on
page 96).
Discuss the applicability of this option with the Robur Pre-Sales Service, before using it.
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