Technical description of the burner
11
20040407
GB
3.10 Burner description
1
Combustion head
2
Ignition pilot
3
Screw for combustion head adjustment
4
Sleeve
5
Low air pressure switch
6
Air pressure test point
7
Gas pressure test point and head fixing screw
8
Screw securing fan to sleeve
9
Slide bars for opening the burner and inspecting the combus-
tion head
10 “ALARM” signal
11 Pilot attachment
12 Ignition transformer “TA”
13 Servomotor
14 UV scanner
15 Plate with four hole knock-outs for electrical cable routing
16 Air inlet to fan
17 Gas input connection
18 Boiler mounting flange
19 Flame stability disk
20 Flame inspection window
21 “ALARM SILENCE” button
22 Fan motor contactor and thermal overload with reset button
23 Flame safeguard with lock-out pilot light and lock-out reset
button
24 “AUTO - MAN” switch
25 RWF40 terminal board “X3”
26 “K1” relay
27 “K3” relay
28 “K min.” relay
29 “K max.” relay
30 Optional holes
31 Fan motor with capacitor
32 Ground terminals
33 Horn
34 DIN bar available for accessory
35 Auxiliary fuse
36 Power supply entry cable
37 “ON - OFF” switch
38 “POWER ON” signal
39 “CALL FOR HEAT” signal
40 “IGNITION ON” signal
41 “FUEL ON” signal
42 Burner terminal board “X1”
43 “/-” switch
44 RWF40 modulator. Available
45 Knockouts foe electrical connections by installer
Two types of burner failure may occur:
➤
Flame safeguard lock-out
If the flame safeguard alarm 23) lights up, it indicates that the
burner is in lock-out. To reset, press the reset pushbutton.
➤
Motor trip
release by pressing the pushbutton on thermal overload, see
“Thermal relay calibration” page 21.
3
7
9
14
15
16
17
18
19
11
5
20
22
23
42
12
25
28
29
26
27
1
2
4
6
30
13
24
21
10
37
8
40
41
30
39
38
43
44
34
35
36
36
32
31
45
33
Fig. 6
D11844
