22
5.9.9 CAN BUS
Connecting the external programming unit
Note
Check whether the room in which the external pro-
gramming unit is installed receives a lot of warmth, for
example sunlight. If it is warmed from outside, the device
might regulate the flow temperature downwards. As a
result, the temperature in other rooms may be lower
than desired.
With an external programming unit, you can switch all appliance
functions and make all settings from the living space. In addition,
the external programming unit captures the room temperature.
If required, this value influences the heating curve. With this, you
can reduce the heating curve if the set room temperature in the
lead room, i.e. the room where the programming unit is installed,
is exceeded (for example through insolation or a wood stove).
Room influence weighting can be set using the „ROOM INFLUEN-
CE“ parameter.
SETTINGS
HEATING
HEATING CURVE HC1
ROOM INFLUENCE HC1
D0000038971
XD04
CAN-L Low
GND Ground
CAN-H High
+12V
Route a standard data cable with at least four cores from the
appliance to the mounting position of the remote control.
Example:
- J-Y(ST)Y 2x2x0.8mm
- LiYCY 2x2x0.5mm²
From approx. 50m cable length greater cable cross-sections
should be used.
Note
Observe correct separation when installing the BUS cable,
the mains power cable and the sensor leads.
Internet Service Gateway
The Internet Service Gateway (ISG) enables you to operate the
appliance within your local home network and via the internet
when on the go.
D0000038971
XD04
CAN-L Low
GND Ground
CAN-H High
The power supply to the ISG is not provided via the appliance.
Also observe the ISG operating instructions.
The CAN BUS cable conductors are allocated as follows:
White High
Brown Low
Black Earth (Ground)
5.10 Filling and venting the heating system
Depending on the heating system, check whether the expansion
vessels in the appliance meet the requirements (see chapter „Spe-
cification“) and whether their pre-charge pressure is sufficient.
Checking the expansion vessels
1
26_04_01_0597_
1 Fill valve of the expansion vessel
Remove the protective caps from the fill valves on the expan-
sion vessels.
Check the pre-charge pressure of the expansion vessel using
a pressure gauge. Please note that the system must be
non-pressurised.
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