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
Before the rst time the equipment is used, the trap must
be lled with water. To do this, add approximately 1/4
litre of water via the ue outlet before tting the ue
system, or unscrew the cap on the trap positioned under-
neath the boiler, ll it with water and ret it
Warning! insucient water in the trap can temporarily
cause the ue gas to be expelled into the surrounding
ambient air
Water circuit diagram
Underoor heating
For appliances with underoor heating, t a safety thermostat
onto the underoor heating outlet. For the electrical connec-
tion of the thermostat see the section on “Electrical connections
- page 24”.
If the outlet temperature is too high, the boiler will stop both do-
mestic 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 underoor heating equi-
pment must be protected by a thermostatic valve, or by a by-pass
to prevent the oor from reaching too high a temperature.
2
1
4
3
11
8
10
12
14
17
18
19
20
21
22
6
5
A C E
1. Air Pressure Switch
2. Overheat Thermostat
3. Burner
4. Detection Electrode
5. C.H. Return Temperature
Probe
6. C.H. Flow Temperature
Probe
8. C.H. Pressure Relief
Valve
10. By-pass
11. Drain valve
12. Trap
14. C.H. circuit lter
17. Water Pressure Sensor
18. Circulation Pump
19. Expansion Vessel
20. Modulating Fan
21. Ignition Electrodes
22. Thermal Fuse
0
50
100
150
200
250
300
350
400
450
500
0 100 200 300 400 500 600 700 800 900 1000 1100 1200
mbar
l/h
24 kW
30-35 kW
30 kW
18-24 kW
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