14
installation
To calculate the size of the heating installation, refer to the
"Available pressure" graph below.
Graph representing the available circulation pump pressure
Δ
T20
o
C
Before the first time the equipment is used, the trap must
be filled with water. To do this, add approximately 1/4
litre of water via the flue outlet before fitting the flue
system, or unscrew the cap on the trap positioned under-
neath the boiler, fill it with water and refit it
Warning! insufficient water in the trap can temporarily
cause the flue 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
. Overheat thermostat
3. Burner
4. Detection electrode
5. C.H. flow 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. Condensate trap
14. C.H. circuit filter
15. D.H.W. Flow switch
16. diverter valve
17. water pressure sensor
18. circulation Pump
19. expansion vessel
0. modulating Fan
1. ignition electrodes
. thermal fuse
Underfloor heating
For appliances with underfloor heating, fit a safety thermostat
onto the underfloor heating outlet. For the electrical connec-
tion of the thermostat see the section on “Electrical connections
- page 4”.
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 “floor 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 underfloor heating equi-
pment must be protected by a thermostatic valve, or by a by-pass
to prevent the floor from reaching too high a temperature.
30-38 kW
Summary of Contents for 47-116-51
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