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4.11
Burner description
19
20
7
A
42-43
9
31
10
17
11
12
14
44
17
8
24
52
51
50
1
Combustion head
2
Ignition electrodes
3
Screw for combustion head adjustment
4
Maximum gas pressure switch
5
Pipe coupling
6
Fuel servomotor
7
Lifting rings
8
Pump motor starter
9
OFF/ON selector (0-1)
10 Terminal board for electrical wiring
11 Operator panel with LCD display
12 Control box for checking flame and air/fuel ratio
13 "K3" relay
14 Filter to protect against radio disturbance
15 Flame inspection window
16 Ignition transformer
17 Cable grommets for electrical wiring (to be carried out by the
installer)
18 Air servomotor
19 Air pressure switch
20 Slide bars for opening the burner and inspecting the com-
bustion head
21 Gas pressure test point and head fixing screw
22 Air pressure test point
23 Flame sensor
24 Air damper
25 Fan air inlet
26 Screws to secure fan to pipe coupling
20121303
Technical description of the burner
7
5
21
3
45 33
25
2
1
30
22
28
29
26
15
4
18
23
49
27
32
6
41
36
37
34
40
48
35
27 Gas input pipe
28 Gas butterfly valve
29 Boiler fixing flange
30 Flame stability disc
31 Bracket for application of output power regulator RWF50
(optional)
32 Return line valve (VR-VR1)
33 Pump motor
34 Pump
35 Safety valve
36 Working valve
37 Fan motor
38 Contactor
39 Overload
40 Nozzle delivery pressure gauge
41 Nozzle return pressure gauge
42 "K1" relay
43 "K2" relay
44 "OIL-EXT-GAS" selector
45 Terminals for earthing
46 Relay with timer "KO"
47 Relay with timer "KG"
48 Minimum oil pressure switch
49 Maximum oil pressure switch
50 6 pole socket
51 4 pole socket
52 7 pole socket
12
GB
Seen from "A"
16
20126922
38
45
39
46
47
13
7
Fig. 5
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