5
BURNER DESCRIPTION (A)
1 Combustion head
2 Ignition electrode
3 Screw for combustion head adjustment
4 High gas pressure switch
5 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
6 Plug-socket on ionisation proble cable
7 Extensions for slide bars 15) (supplied by kit)
8 Motor contactor and thermal overload with reset but-
ton
9 Power switch for different operations:
automatic - manual - off
Button for:
power increase - power reduction
10 Terminal strip for electrical connection
11 Pilot burner attachment
12 Flame safeguard with lock-out pilot light and lock-out
reset button
13 Flame inspection window
14 Low air pressure switch
(differential operating type)
15 Slide bars for opening the burner and inspecting the
combustion head
16 Gas pressure test point and head fixing screw
17 Air pressure test point
18 Flame sensor probe (flame rod)
19 Pilot burner
20 Air inlet to fan
21 Screws securing fan to sleeve
22 Gas input pipework
23 Gas butterfly valve
24 Boiler mounting flange
25 Flame stability disk
26 Air damper
Two types of burner failure may occur:
• FLAME SAFEGUARD LOCK-OUT:
if the flame relay 12)(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 8)(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 burner 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
3/8
W x 1”
1 - Burner head gasket
2 - Extensions 7)(A) for slide bars 15)(A)
(for kit)
4 - Screws to secure the burner flange to the boiler:
1/2
W
1 - Instruction booklet
1 - Spare parts list
(A)
(B)
D2792
D36
D731
inch
A (1)
B
C
lbs
RS 68/M LN
46
27/32
“ - 52
5/32
“
29
1/8
“
27
1/4
“ 154
RS 120/M LN
46
27/32
“ - 52
5/32
“
29
1/8
“
27
1/4
“ 167
(C)
(1) Blast tube: short - long (obtainable with kit)
inch
A
B
C
D
E
F (1)
G
H
I (1)
L
M
N
O
RS 68/M
20
3/4
“
12
9/32
“
8
15/32
“ 21
27/32
“ 33
1/16
“ 10“ - 15
3/8
“ 7
7/16
“ 16
29/32
“ 45
11/16
“ - 51
1/32
“ 8
13/32
“ 5
9/32
“ 8
11/16
“
2”
RS 120/M
21
25/32
“ 13
5/16
“
8
15/32
“ 21
27/32
“ 33
1/16
“ 10“ - 15
3/8
“ 7
7/16
“ 16
29/32
“ 45
11/16
“ - 51
1/32
“ 8
13/32
“ 5
9/32
“ 8
11/16
“
2”
