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4.12
Electrical panel description
24
21
20
22
23
20
19
10
19
7
4
3
2
27
6
16
15
1
Electrical control box
2
"0 - AUTO" selector
3
Emergency button
4
Earth terminal
5
Supply cables and external connections passage
See section "Electrical wiring" on page 33
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 (includes a spare 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 OIL
operation
19 Thermal relay of pump motor (with RESET button)
20 Triangle contactor of pump motor
21 Star contactor (Star/triangle start up)
22 Auxiliary contacts
23 Timer for star/triangle start up
24 Triangle contactor (Star/triangle start up)
27 Change of fuel selector
28 Fan motor cables sheath
20182649
Technical description of the burner
12
1
14
17
11
13
30
29
4
4
4
28
5
9
8
18
29 Flame sensor
30 Fuel servomotor
31 Maximum gas pressure switch sheath
32 Air servomotor
33 Safety valve sheath (VS1)
34 Return line valve sheath (VR)
35 Working valve sheath (VF)
36 Safety valve sheath (VS)
37 Minimum oil pressure switch sheath
38 Maximum oil pressure switch sheath
39 Pump motor cables sheath
14
GB
32
31
4
4
5
20185178
Fig. 6
33
38
34
39
35
36
37
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