56
Heating
Coding
Coding in the delivered condition
Possible change
DHW priority
A2:0
No priority control during cylinder
heating.
Note
Individually adjustable for each
heating circuit. Select heating cir-
cuit with
Á
A2:1
During cylinder heating, the mixer
closes. When the heating circuit is
wired to the boiler control unit, the
heating circuit pump remains switch-
ed on. When using an extension kit
for the heating circuit, the heating
circuit pump is switched off.
A2:2
During cylinder heating, the mixer is
closed and the heating circuit pump
is switched off.
Note
Only possible for heating circuits
that are connected to the boiler con-
trol unit.
A2:3
During cylinder heating, the set flow
temperature is adjusted to the set
value for reduced heating mode and
the heating circuit pump is switched
off.
Frost protection temperature
A3:2
Outside temperature below 1 °C:
Frost protection function
"On"
Outside temperature above 3 °C:
Frost protection function
"Off"
A3:-9
to
A3:15
Frost protection function
"On"
/
"Off"
!
Please note
If the frost protection temperature is set to an
outside temperature of less than 1 °C, uninsula-
ted pipes may freeze. There is a particular risk
for outdoor pipes and in standby mode, e.g. dur-
ing holidays.
Provide pipes with thermal insulation and avoid
unsupervised standby mode.
Note
If no heat is available, the water in the system is only
circulated.
Coding
Coding in the delivered condition
Possible change
Frost protection activate
A4:0
The frost protection function is
ac-
tivated
. Start and stop tempera-
tures of the function can be adjus-
ted (code
"A3"
, heating group).
Frost protection function: The heat-
ing circuit pump is switched on at
the relevant outside temperature; a
minimum flow temperature of
10 °C is specified. At the relevant
outside temperature, it is automati-
cally switched off.
A4:1
The frost protection function is
deac-
tivated
. Adjustment only possible if
code
"A3:−9"
has been set.
Note
Observe the note for code
"A3"
.
Codes
Code 2
(cont.)
5777 985 GB
Codes