4
BURNER DESCRIPTION (A)
1 Combustion head
2 Ignition electrode
3 Screw for combustion head adjustment
4 High gas pressure switch
5 Sleeve
6 Servomotor controlling the gas butterfly valve and
the air damper (by means of a variable profile cam
mechanism).
When the burner is stopped the air damper will be
completely closed to reduce heat loss.
7 Plug-socket on flame rod cable
8 Extensions for slide bars 16) (supplied by kit)
9 Motor contactor and thermal overload with reset but-
ton
10 Power switch for different operations:
automatic - manual - off
Button for:
Power increase - power reduction
11 Terminal strip for electrical connection
12 Pilot burner attachment
13 Flame safeguard with lock-out pilot light and lock-out
reset button
14 Flame inspection window
15 Low air pressure switch
(differential operating type)
16 Slide bars for opening the burner and inspecting the
combustion head
17 Gas pressure test point and head fixing screw
18 Air pressure test point
19 Flame sensor probe (flame rod)
20 Air damper
21 Air inlet to fan
22 Screws securing fan to sleeve
23 Gas input pipework
24 Gas butterfly valve
25 Boiler mounting flange
26 Flame stability disk
27 Pilot burner
Two types of burner failure may occur:
• FLAME SAFEGUARD LOCK-OUT:
if the flame relay 13)(A) pushbutton lights up, it indi-
cates that the burner is in lock-out.
To reset, press the pushbutton.
• MOTOR TRIP:
release by pressing the pushbutton on thermal over-
load 9)(A).
PACKAGING - WEIGHT (B) - Approximate measure-
ments
• The burners are shipped skid mounted.
Outer dimensions of packaging are indicated in (B).
• The weight of the burner complete with packaging is
indicated in Table (B).
MAX. DIMENSIONS (C) - Approximate measurements
The maximum dimensions of the burners are given in
(C).
Bear in mind that inspection of the combustion head
requires the burner to be opened by withdrawing the
rear part on the slide bars.
The maximum dimension of the burner, when open is
give by measurement I.
STANDARD EQUIPMENT
1 - Gas train flange
1 - Flange gasket
4 - Flange fixing screws
1 - Burner head gasket
4 - Screws to secure the burner flange to the boiler:
1/ 2
W x 1
3/8
”
1 - Cap for combustion head
1 - Disc for combustion head
1 - Instruction booklet
1 - Spare parts list
(A)
A
B
C
lbs
52
3/4
“
28
1/2
“
30
29/32
“
198
D36
(B)
A
B
C
D
E
F (1)
G
H
I (1)
L
M
N
O
26
13/16
“
14
13/32
“
12
13/32
“
21
27/32
“
33
31/32
“
14
11/16
“
-
19
13/16
“
8
11/16
”
16
15/16
”
56
49/64
”
-
62
31/64
”
9
21/64
”
5
29/32
”
7
5/16
”
2
”
(C)
D2791
D1702
(1) Blast tube: short - long (with kit)
Содержание 20011691
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