Technical information
16
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 equipment is used, for the rst
time 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 un-
derneath 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.
Underoor heating
For appliances with underoor heating, t a safety
thermostat onto the underoor heating outlet. For
the electrical connection of the thermostat see the
section on “Electrical connections”.
If the outlet temperature is too high, the boiler will
stop both domestic hot water and the heating pro-
duction and the error code “oor thermostat contact
open”. Flashing light (Green Leds Temperature indi-
cador 40 and 70) will restart when the thermostat is
closed during automatic resetting.
If the thermostat cannot be installed, the underoor
heating equipment must be protected by a thermos-
tatic valve, or by a by-pass to prevent the oor from
reaching too high a temperature.
Water circuit diagram
A
B
C
D
E
I
G
H
F
1
3
2
9
7
8
10
11
12
13
14
15
16
17
18
19
6
5
4
A B C D E
1. Manual air vent
2.
Burner
3.
Detection electrode
4.
C.H. ow temperature probe
5.
C.H. return temperature probe
6.
Secondary heat exchanger
7. C.H. pressure relief valve
8. By-pass
9.
Drain valve
10. Condensate trap
11.
C.H. circuit lter
12.
D.H.W. Flow switch
13.
Diverter valve
14. Low
water pres switch
15.
Circulation pump
16. Expansion vessel
17.
Modulating fan
18.
Ignition electrodes
19. 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
30-38 kW