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Control unit for weather-compensated operation
Accessories
Note on room temperature dependent
control (RS function) with remote con
trols
Because of the "inertia" of underfloor
heating systems, the RS function must not
be used for an underfloor heating circuit.
Wall mounting fixture with blank cover,
Part No. 7148 913
(for use where the programming unit of
the control unit is to be used as a remote
control)
All the functions of the programming unit
can be used.
WS function: The unit can be mounted
anywhere in the building.
RS function: The remote control is
mounted on the inside wall of the main
living room opposite the radiators, but
not in shelves, alcoves or immediately
next to doors or sources of heat (e.g. in
direct sunlight, next to a fireplace, TV set
etc.).
Electrical connection:
H 2-core cable, max. cable length
30 metres with a conductor cross-sec
2
tion of 1.5 mm
copper
H The cable must not be laid together
with 230/400 V lines.
Ambient temperature
H during operation:
20 to +40 °C
H during storage
and transport:
20 to +65 °C
Radio clock module,
Part No. 7450 022
For receiving the time signal transmitter
DCF 77 for time and date settings with
radio-controlled precision.
The radio clock module is inserted in the
wall mounting fixture.
18
Display unit,
Part No. 7450 160
Inserted in the control unit for weather-com
pensated operation when the programming
unit of the control unit is used as a remote
control.
The boiler water temperature and fault
messages are displayed.
Temperature sensor for low loss header,
Best. Nr. 7819 601
Flow temperature sensor for the common
flow in applications where a low loss
header is used.
Can be mounted with clamping strap.
Cable length approx. 3.75 metres, with
plug ready for connection
Degree of protection:
IP 32
Ambient temperature
H during operation:
20 to +90 °C
H during storage
and transport:
20 to +70 °C
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