20052068
8
GB
Technical description of the burner
3.7
Burner description
1
Combustion head
2
Burner pilot
3
Screw for combustion head adjustment
4
Maximum gas pressure switch
5
Burner pilot attachment
6
Gas actuator
7
Ignition electrode
8
Fan motor contactor and thermal relay with reset button
9
Lifting ring
10 Terminal board for electrical wiring
11 Operator panel with LCD display
12 Control box for checking flame and air/fuel ratio
13 Auxiliary fuse
14 Signal “CALL FOR HEAT”
15 UV flame sensor
16 Ignition transformer
17 Holes for cable grommets for electrical wiring for accesso-
ries(to be carried out by the installer)
18 Air actuator
19 Air pressure switch (differential operating type)
20 Sliding 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 Extension sliding bars
24 Switch “OFF - ON”
25 Fan air inlet
26 Screws to secure fan to pipe coupling
27 Switch “LOCAL REMOTE”
28 Gas butterfly valve
29 Boiler fixing flange
30 Flame stability disc
31 Horn
32 Button “ALARM SILENCE”
33 Signal “POWER ON”
34 Signal “IGNITION ON”
35 Signal “FUEL ON”
36 Signal “ALARM ON”
37 RWF40 modulator (with anolog output 4-20 mA)
38 Auxiliary contact for fan motor contactor
39 Din bar available for accessories
40 Optional holes
41 Din bar for fuse holder step-down transformer and OCI 412.10
42 Ground terminals
43 Din bar for thermal relay, fan motor contactor and available for
accessories
44 Fan motor
45 k
1
relay
46 k
5
relay
47 k
3
relay
48 k
2
relay
49 Gas train flange
50 Hight voltage lead
51 Air pressure switch test point “+”
52 Air pressure switch test point “-”
Two types of burner failure may occur:
➤
Flame safeguard lock-out - if the flame safeguard alarm
36)(Fig. 3) lights up, it indicates that the burner is in lock-out.
To reset, press the reset pushbutton.
➤
Fan motor trip - release by pressing the pushbutton on thermal
overload 8) (Fig. 3). See “Thermal relay Thermal relay calibra-
tion” on page 25.
20054606
Fig. 3
