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INSTALLATION
To calculate the size of the heating installation, refer to the
"Available pressure" graph below.
Graph representing the available circulation pump pressure
∆T20
o
C
0
100
200
300
400
500
600
0 200 400 600 800 1000 1200
mbar
l/h
(c)
Underfl oor heating
For appliances with underfl oor heating, it is possible but not
necessary to fi t a safety thermostat onto the underfl oor heating
outlet. For the electrical connection of the thermostat see the
section on “Electrical connections - pages 26”.
If the outlet temperature is too high, the boiler will stop both
domestic hot water and the heating production and the error
code 1 16 “fl oor thermostat contact open” will appear on the
display. The boiler will restart when the thermostat is closed
during automatic resetting.
If the thermostat cannot be installed, the underfl oor heating
equipment must be protected by a thermostatic valve, or by a by-
pass to prevent the fl oor from reaching too high a temperature.
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