Technical information

14
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
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 ret it
Warning! insucient water in the trap can temporarily
cause the ue gas to be expelled into the surrounding
ambient air
Water circuit diagram
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
A
B
C
D
E
I
G
H
F
2
1
4
3
11
8
10
9
12
13
14
15
16
17
18
19
20
21
22
7
6
5
A B C D E
1. Manual air vent
2. Overheat thermostat
3.
Burner
4.
Detection electrode
5.
C.H. ow temperature
probe
6.
C.H. return temperature
probe
7.
Secondary heat ex-
changer
8.
C.H. pressure relief valve
9. D.H.W. temperature
probe
10.
By-pass
11. Drain valve
1
2. Condensate trap
14. C.H. circuit lter
15.
D.H.W. Flow switch
16.
diverter valve
17.
water pressure sensor
18.
circulation Pump
19.
expansion vessel
20. modulating Fan
21. ignition electrodes
22. thermal fuse
Underoor heating
For appliances with underoor heating, t a safety thermostat
onto the underoor 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 underoor 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.
30-38 kW