Operating instructions

Controls and display elements
A Pressure gauge
B Fault display (red)
C ON indicator (green)
D Reset button
E Control panel:
O Set boiler water tem-
perature
F Set DHW temperature
O+F Emissions test function
K St andby mode :
L DHW only
G Heating and DHW
/ No function
b/a Setting values
d Confirmation
c Information
e Standard setting ( Reset)
F ON/OFF switch
Heating mode
The set boiler water temperature will
be maintained in the "Heating and
DHW" program when a demand is
raised by the room thermostat.
The boiler water te mperature will be
maintained at the default frost protec-
tion temperature when there is no
demand.
The boiler water te mperature will be
limited:
&
to 74 °C by the thermostat inside the
burner control unit.
&
to 82 °C by the electronic tempera-
ture limiter insi de the burner control
unit (during DHW heating to 87 °C).
&
to 100 °C by the temperature limiter
in the safety chain (interlocks t he
burner control unit).
Constant temperature control unit
90
Function description
5692 619 GB