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20 | Operation
If the DHW program changes from a
higher to a lower temperature, the
water in the cylinder will not
immediately cool to the lower
temperature, i.e. water at a higher
temperature will continue to be
available for some time. However,
the cylinder will not be reheated
until the temperature falls below
the new set temperature.
DHW circulation program
The DHW circulation program specifies when a
connected DHW circulation pump for domestic
hot water runs.
6 720 800 817 (2012/02)
5.2
Display views and menu
navigation
The user interface of the FR 120 room
temperature-dependent heating controller is
implemented as a so-called "menu". Within that
menu, the various functions are arranged in a
hierarchical structure. For greater clarity, the
menu is subdivided into three sections (MAIN
MENU, INFO, INSTALLER SETTINGS). Each
section can be accessed by its own button. The
entire menu structure is shown in tabular form in
chapters 6.1, 7 and 8.1.
To navigate through the menu:
Press
to open MAIN MENU. From any
•
menu
point within the MAIN MENU, press
go back to the standard display.
Press
to open the INFO menu. From any
info
•
point within the INFO menu, press
back to the standard display.
Hold down
for at least 3 seconds to open
menu
•
the INSTALLER SETTINGS menu. From any
point within the INSTALLER SETTINGS menu,
press
to go back to the standard display.
menu
The selected menu point/parameter is
•
info
inverse
displayed in
black.
Arrows in the left margin indicate that there is
•
more information than can be shown on the
display at once. It can be viewed with
opens the submenu associated with the
•
selected menu point/parameter or activates
editing mode for the parameter (the
parameter setting starts flashing).
to
menu
to go
info
colours, i.e. white on
.
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Troubleshooting
