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3.9
Burner description
9
D10435
34 43
8
42
31
32
43
1
Combustion head
2
Ignition pilot
3
Screw for combustion head adjustment
4
Sleeve
5
Low air pressure switch (differential operating type)
6
Air combustion head 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 lamp
11 Pilot attachment
12 Ignition transformer
13 Air actuator
14 UV flame sensor
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 (noise)
22 Fan motor contactor and thermal overload with reset button
23 Control box for checking flame and air/fuel ratio
24 Local/remote - manual selector
25 Fan motor with capacitor
26 Ground terminals
27 Auxiliary fuse
28 Burner ON/OFF selector
20026767
Technical description of the burner
7
11
4
3
17
16
15
28
24
21
41
18
2
29
6
30
10
10
19
44
14 46
20
5
23
1
45
27
22
40
29 Power ON signal
30 Call for heat lamp
31 Ignition ON lamp
32 Fuel ON lamp
33 Burner terminal board
34 RWF55 modulator (with analog output 4-20 mA)
35 Lifting rings
36 K2 relay
37 K1 relay
38 K3 min. relay
39 K5 max. relay
40 Power supply entry cable
41 Gas actuator
42 RWF55 terminal board
43 Optional holes
44 Operator panel with LCD display and lock-out reset button
45 Horn
46 Air pressure switch test point
Two types of burner failure may occur:
Flame safeguard lock-out: If the alarm signal lamp in "ON"
10)(Fig. 6) lights up, it indicates that the burner is in lock-out.
To reset, press the reset pushbutton 44).
Motor trip: release by pressing the pushbutton on thermal
overload, see "Thermal relay calibration" page 22.
GB
13
35
12
36
37
39
38
25
26
33
Fig. 6
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