8
INSTALLATION
BOILER PLATE (A)
Drill the combustion chamber mounting plate as shown
in (A). The position of the threaded holes can be marked
using the burner head gasket supplied with the burner.
BLAST TUBE LENGTH (B)
The length of the blast tube must be selected according
to the indications provided by the manufacturer of the
boiler, it must be greater than the thickness of the boiler
door complete with its insulation. The range of lengths
available, (mm), is as follows:
Blast tube 12)
RS 68/M LN
RS 120/M LN
• short
10“
10“
• long (with kit)
15
3/8
“
15
3/8
“
For boilers with front flue passes 15) or flame inversion
chambers, protective insulation material 13), must be
inserted between the boiler refractory 14) and the blast
tube 12).
This protective insulation must not compromise the
extraction of the blast tube.
For boilers having a water-cooled front, the insulation
13)-14) is not required unless it is required by the boiler
manufacturer.
SECURING THE BURNER TO THE BOILER (B)
Before securing the burner to the boiler, check through
the blast tube opening to make sure that the flame sen-
sor probe and the ignition electrode are correctly set in
position, as shown in (C).
Now detach the combustion head from the burner, fig. (B):
- Loosen the four screws 3) and remove the cover 1).
- Disengage the swivel joint 7) from the graduated sec-
tor 8)
- Remove the screws 2) from the two slide bars 5).
- Remove the two screws 4) and pull the burner back on
slide bars 5) by about 4”.
- Disconnect the wires from the flame rod and the elec-
trode and then pull the burner completely off the slide
bars.
Once this operation has been carried out (if it was
required), secure the flange 11)(B) to the boiler plate,
inserting the gasket 9)(B) supplied with the burner. Use
the 4 screws, also supplied with the unit, after first pro-
tecting the thread with an anti-locking product.
The seal between burner and boiler must be airtight.
If you noticed any irregularities in the positions of the
flame rod or ignition electrode during the check mentioned
above, remove screw 1)(E), extract the internal part 2)(E)
of the head and set up the two components correctly.
Do not attempt to turn the probe. Leave it in the position
shown in (C) since if it is located too close to the ignition
electrode the control box amplifier may be damaged.
IGNITION PILOT ADJUSTMENT
Place the pilot and electrode as shown in fig. (C).
The pilot works correctly at pressures ranging from 5 -
12” WC.
Important
To set the pilot without main burner operaton, proceed
as follows:
- Move the jumper from terminals "
30-V11
" to terminals
"
30-VP
", as given in fig. (F), this way the main valve is
cut out.
- With the burner in the manual position, hold the air
damper in the minimum position and make the setting.
- When the setting is correct, replace the jumper on “
30-
V11
”.
COMBUSTION HEAD CALIBRATION
At this point check, for model RS 120/M LN, whether
the maximum delivery of the burner at high fire oper-
ation is contained in area A or in area B of the firing
rate. See page 6.
If it is in area A then no operation is required.
If, on the other hand, it is in area B, before starting
the burner remove the 4 circular sectors 1) (D) fas-
tened behind the stabilizing disc by removing the 8
screws 2)(D).
(A)
(B)
inch
A
B
C
RS 68/M LN
RS 120/M LN
7
11/16
“
7
11/16
“
10
13/16
“ - 12
25/32
“
10
13/16
“ - 12
25/32
“
1/2 W
1/2 W
D455
D2794
Electrode
Probe
D2796
(C)
(E)
MB - Burner terminal strip
D2317
Ignition
pilot
1
2
D2382
D1210
(F)
(D)
