Ariston NEXT SFT 14 User Manual - Page 12

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3. installation

3.4. Operating Principle

Legend
1.
Heat exchanger
2.
Overheat thermostat
3.
Detection Electrode
4.
Burner
5.
Fan
6.
Outgoing water temperature sensor
7.
Air pressure switch
8.
Safety valve
9.
Cold water inlet fi lter
10. Water fl ow switch
11. Inlet water temperature probe
12. Gas valve
13. Ignition electrode

3.5. Electrical Circuit Diagram

1
2
L N
FUSE 2AT
FLAME
Legend
1.
Detection Electrode
3.
Gas valve
4.
Spark generator
5.
Fan
6.
Air pressure switch
7.
Overheat thermostat
8.
Modulator Gas valve
9.
Thermal fuse
10. Water fl ow switch
11. Outgoing water temperature sensor
12. Inlet water temperature probe
12
Display
3
4
1
2
3
4
5
6
7
8
B
5
6
7
8
P1 P2 SW2 SW3
ON
1
2 3 4
microswitch
Microswitch position
Model
GAS
G20
NEXT SFT 14
G31
13
12
11
10
9
C
D
9
10 11
1
2
3
4
CN14
Microswitch
1
2
3
OFF
ON
OFF
OFF
ON
OFF
4
OFF
ON