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4.12
Electrical panel description
20
19
20178766
10
7
4
3
2
22
6
16
15
1
Electronic cam
2
ON/OFF selector
3
Emergency button
4
Earth terminal
5
Supply cables and external connections passage.
See section "Electrical wiring" on page 32
6
"POWER ON" light signalling
7
Main terminal supply board
8
Relay with clean contacts for signalling the burner is in lock-
out
9
Relay with clean contacts for signalling the burner is in GAS
operation
10 Auxiliary circuits fuse
11 Air pressure switch
12 Ignition transformer
13 Valve group terminal board
14 Operator panel with LCD display
15 Light signalling burner lockout and reset button
16 "OVERLOAD FAN MOTOR" light signalling
17 Electronic cam transformer
18 Relay with clean contacts for signalling the burner is in oper-
ation
19 Thermal relay of pump motor (with RESET button)
20 Pump motor contactor
21 Sheath for pump motor cables
22 Change of fuel selector
23 Sheath for motor revolution sensor
24 Flame sensor
Technical description of the burner
12
1
14
17
11
13
25
24
4
23
4
4
5
9
8
34
25 Fuel servomotor
26 Sheath for maximum gas pressure switch
27 Air servomotor
28 Safety valve sheath (VS1)
29 Return line valve sheath (VR)
30 Working valve sheath (VF)
31 Safety valve sheath (VS)
32 Sheath for minimum oil pressure switch
33 Sheath for maximum oil pressure switch
34 Relay with clean contacts for signalling the inverter is in
lockout
13
GB
27
18
26
28
4
33
29
21
30
31
32
4
5
Fig. 6
20182250
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