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15
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)
Under
fl
oor heating
For appliances with under
fl
oor heating, it is possible but not
necessary to
fi
t a safety thermostat onto the under
fl
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 under
fl
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.
