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2.4 Settings and Adjustments
Symbols in the display
The symbols
“
”
,
“
”
or
“
”
appear
individually or in combination
according to the current operating status of
the system, i.e. depending on the program
or activation periods.
Heating program “ ”
Heating program “ ”
Heating program “
”
DHW:
OFF
Space heating: OFF
DHW:
ON
Space heating: OFF
DHW:
ON
Space heating: ON
No symbols are displayed
after the above data
The
symbol
” ” appears if
domestic hot water is being
heated (according to activa-
Both symbols appear in combination if the heating circuit is currently
switched to heating (according to activation period) and the priority
control for domestic hot water heating is
not
activated.
(
g
tion period)
DHW:
ON
Space heating: ON
Both symbols appear in combination if the heating circuit is switched to
reduced operation (according to activation period) and the priority con-
trol for domestic hot water heating is
not
activated.
If only the symbol ” ” appears, the DHW priority control is activated.
DHW:
ON
Space heating: OFF
The current point in time is outside the period in which domestic hot
water heating is provided.
Domestic hot water heating does
not
take place. Space heating is OFF.
The current point in time is outside the selected activation period. The
system goes to standby mode, i.e. with frost protection. The selector
knob “ ” is turned to “0”.
Setting the heating program
Three heating programs can be set with the program selection switch.
Program selection switch
Heating program
When setting required
DHW
:
ON
Space heating
:
ON
with frost protection
Factory setting
i.e. during the heating season
DHW
:
ON
Space heating
:
OFF
with frost protection
i.e. in summer when space heating is not re-
quired
DHW
:
OFF
Space heating
:
OFF
Frost protection
:
ON
i.e. when away on holidays or during
a long period of absence
Frost protection of the heating system
If the outdoor temperature falls below
+34
ºF
/ +1
º
C, the first boiler in a
multi-boiler system is operated with a
minimum boiler water temperature in order
to avoid damage to the heating system due
to freezing. The system pump is activated.
The frost protection function is cancelled
with outdoor temperatures over +37
ºF
/
+3
º
C. The system pump is switched off.
