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Technical description of the burner
3.4 Burner description
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 Signal “Alarm ON”
11 Pilot attachment
12 Ignition transformer “TA”
13 Air actuator
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 Button “Alarm Silence”
22 Fan motor contactor and thermal overload with reset button
23 Control box for checking flame and air/fuel ratio
24 Switch “Local - Remote”
25 Fan motor
26 Ground terminals
27 Auxiliary fuse
28 Switch “OFF/ON”
29 Signal “Power ON”
30 Lamp Signal “Call for Heat”
31 Signal “Ignition ON”
32 Signal “Fuel ON”
33 Burner terminal board “X1”
34 RWF40 modulator (with analog output 4-20 mA)
35 Lifting rings
36 Relay “K2”
37 Relay “K1”
38 Relay “K3”
39 Relay “K5”
40 DIN bar available for accessories (OCI 412.10)
41 Gas actuator
42 RWF40 terminal board “X3”
43 Optional holes
44 Operator panel with LCD display
45 Horn
46 Air pressure switch test point (+)
47 Air pressure switch test point (-)
48 Power supply entry cable
Two types of burner failure may occur:
Flame safeguard lock-out
If the alarm signal lamp in “ON” 10)(Fig. 1) lights up, it indi-
cates 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 23.
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