Direct Digital Controller
Direct Digital Controller fw 4.013 – Ed. 01/2013
15
2.5 BASE AND SEPARABLE DHW SERVICE CONTROL MENU
To access the “DHW Plant control” menu, follow the indications given below:
1 - Select the
icon from the initial screen and press the knob to gain access to the screen displaying the
base and separable DHW service operation parameters.
2 - Select the
symbol positioned above to gain access to
“Base DHW control”
menu (see “Zone 5”
Figure 2 on page 6).
3 - Select the
symbol positioned below to gain access to
“Separable DHW control”
menu (see “Zone
6” Figure 2 on page 6).
4 - In both cases (“Base DHW control” and “Separable DHW control”) the screen shown in Figure 4 will be
displayed on the screen.
5 - The switching on of the Units of which use is made to produce domestic hot water requires also a request
coming from the RB100 or RB200; the button in position ON is not sufficient by itself to switch on the units
of the DHW group. The base or separable DHW services each require a specific request; for more
information please consult the installation and use booklet of the RB 100 (code D-LBR468) and the RB
100 applications booklet (code D-LBR467), or the installation and use booklet of the RB 200 (code D-
LBR632) and the applications manual (code D-LBR630), according to the type of device used.
Figure 4
–
EXAMPLE OF BASE OR SEPARABLE DHW SERVICE CONTROL SCREEN
Base or separable DHW service ON/OFF switch.
Used to switch the corresponding
DHW service ON/OFF.
To
switch on
the plant, turn the knob and position the cursor on
then press the
knob. The button will appear thus
to indicate that the switch has been closed
(ON).
To
disable
the plant, turn the knob and position the cursor on
and then press the
same. The button will appear thus
to indicate that the switch has been opened
(OFF).
The
symbol indicates that the button cannot be selected. The switch does not
affect the switching on of the units. The “milled” icon is shown only on the Slave DDC
in case of Multi-DDC configuration, and the switching On/Off of the corresponding
DHW service can occur only on the Master DDC. The “button” on the Slave DDC
reflect the status of the Master DDC button.
Switching off the DHW service does not necessarily imply that the units are switched off. If also the heating
service is configured, the units may come on to satisfy this request. In order to ensure the real switching off
of the plant, switch off also the heating service, as indicated in paragraph 2.4 “COOLING/HEATING
SERVICE CONTROL MENU” on page 11.
A
KEY
A General Power Switch
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