Ariston E-COMBI 24 Installation And Servicing Instructions page 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 C
o
mbar
500
450
400
350
300
24 kW
250
200
150
100
50
0
0 100 200 300 400
Before the equipment is used, for the first
time 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 un-
derneath 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.
F
A
I
Underfloor heating
For appliances with underfloor heating, fit a safety
thermostat onto the underfloor 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 "floor thermostat contact
open". Flashing light (Green Leds Temperature indi-
cador 40 and 70) will restart when the thermostat is
closed during automatic resetting.
16
30-38 kW
30-35 kW
500 600 700 800 900 1000
G
E
D
C
B
H
If the thermostat cannot be installed, the underfloor
heating equipment must be protected by a thermos-
tatic valve, or by a by-pass to prevent the floor from
reaching too high a temperature.
Water circuit diagram
1
2
3
1100 1200
l/h
6
7
8
9
10
A
1. Manual air vent
. Burner
3. Detection electrode
4. C.H. flow 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 filter
1. 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
B C D E
19
18
17
16
15
14
13
12
11