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INSTALLATION INSTALLATION
To calculate the size of the heating installation, refer to the
"Available pressure" graph below.
Graph representing the available circulation pump pressure
ΔT20
o
C
Underoor heating
For appliances with underoor heating, it is possible but not
necessary to t a safety thermostat onto the underoor heating
outlet. For the electrical connection of the thermostat see the
section on “Electrical connections - pages 28-29”.
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 “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oor heating
equipment must be protected by a thermostatic valve, or by a by-
pass to prevent the oor from reaching too high a temperature.
BEFORE THE DEVICE IS USED, FOR THE
FIRST TIME THE TRAP MUST BE FILLED
WITH WATER.
The siphon is lled with water during
deaeration procedure of the boiler (or heating
system) - see p. 32
Ensure that the siphon contains water; if not, it
must be relled. Open the manual air vent (2)
on the main exchanger until complete lling.
Check again the system pressure on the
pressure gauge.
WARNING!
INSUFFICIENT WATER IN THE TRAP CAN
TEMPORARILY CAUSE THE FLUE GAS TO
BE EXPELLED INTO THE SURROUNDING
AMBIENT AIR
2
0
100
200
300
400
500
600
0 200 400 600 800 1000 1200
mbar
l/h
16


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