Installation; Boiler Plate; Blast Tube Length; Securing The Burner To The Boiler - Riello RL 70 Installation, Use And Maintenance Instructions

mm A B
RL 70 185 275-325
RL 100 185 275-325
RL 130 195 275-325
(A)
(B)
(C)
kg/h (1)
GPH
10 bar 12 bar
5,00 19,2 21,2
5,50 21,1 23,3
6,00 23,1 25,5
6,50 25,0 27,6
7,00 26,9 29,7
7,50 28,8 31,8
8,00 30,8 33,9
8,30 31,9 35,2
8,50 32,7 36,1
9,00 34,6 38,2
9,50 36,5 40,3
10,0 38,4 42,4
10,5 40,4 44,6
11,0 42,3 46,7
12,0 46,1 50,9
12,3 47,3 52,2
13,0 50,0 55,1
13,8 53,1 58,5
14,0 53,8 59,4
15,0 57,7 63,6
15,3 58,8 64,9
16,0 61,5 67,9
17,0 65,4 72,1
17,5 67,3 74,2
18,0 69,2 76,4
19,0 73,0 80,6
19,5 75,0 82,7
20,0 76,9 84,8
21,5 82,7 91,2
22,0 84,6 93,3
(1) light oil: density 0,84 kg/dm
C
M 12
M 12
M 12
kW
12 bar
14 bar
23,1 251,4
25,4 276,3
27,7 302,4
30,0 327,3
32,3 352,3
34,6 377,2
36,9 402,1
38,3 417,5
39,2 428,2
41,5 453,1
43,8 478,0
46,1 502,9
48,4 529,0
50,7 553,9
55,3 603,7
56,7 619,1
59,9 653,5
63,3 693,8
64,5 704,5
69,2 754,3
70,5 769,7
73,8 805,3
78,4 855,1
80,7 880,0
83,0 906,1
87,6 956,0
89,9 980,9
92,2 1005,8
99,1 1081,7
101,4 1106,6
3
- viscosity 4,2 cSt/20 °C - temperature 10 °C

INSTALLATION

BOILER PLATE (A)
Drill the combustion chamber locking plate as
shown in (A). The position of the threaded holes
can be marked using the thermal screen sup-
plied with the burner.
BLAST TUBE LENGTH (B)
The length of the blast tube must be selected ac-
cording to the indications provided by the manu-
facturer of the boiler, and in any case it must be
D455
greater than the thickness of the boiler door com-
plete with its fettling. The range of lengths avail-
able, L (mm), is as follows:
Blast tube 9):
• short
• long
For boilers with front flue passes 12) or flame in-
version chambers, protective fettling in refractory
material 10) must be inserted between the boil-
er's fettling 11) and the blast tube 9).
This protective fettling must not compromise the
extraction of the blast tube.
For boilers having a water-cooled front the re-
fractory fettling 10)-11)(B) is not required unless
it is expressly requested by the boiler manufac-
turer.
SECURING THE BURNER TO THE BOILER (B)
Disassemble the blast tube 9) from the burner 6)
by proceeding as follows:
- Loosen the four screws 3) and remove the
cover 1).
D689
- Remove the screws 2) from the two slide bars 5).
- Remove the two screws 4) fixing the burner 6)
to the flange 5).
- Withdraw the blast tube 9) complete with
flange 7) and slide bars 5).
COMBUSTION HEAD CALIBRATION
At this point check, for model RL 130, whether
the maximum delivery of the burner in 2nd stage
operation is contained in area B or in area C of
the firing rate. See page 4.
If it is in area B then no operation is required.
If, on the other hand, it is in area C:
- Unscrew the screws 1)(C) and disassemble
the blast tube 5).
- Unscrew the screws 3) and remove the shutter
4).
D690`
- Tighten the screws 3) on the rod 2).
- Now refit the blast tube 5) and the screws 1).
Once this operation has been carried out (if it
was required), secure flange 7)(B) to the boiler
plate interposing the supplied gasket 8). Use the
4 screws provided after having protected the
thread with antiscruffing products (high-tempera-
ture grease, compounds, graphite). The burner-
boiler seal must be airtight.
CHOICE OF NOZZLES FOR 1ST AND 2ND
STAGE
Both nozzles must be chosen from among those
listed in Table (D).
The first nozzle determines the delivery of the
burner in the 1st stage.
The second nozzle works together with the 1st
nozzle to determine the delivery of the burner in
the 2nd stage.
The deliveries of the 1st and 2nd stages must be
contained within the value range indicated on
page 2.
Use nozzles with a 60° spray angle at the recom-
mended pressure of 12 bar.The two nozzles usu-
ally have equal deliveries, but the 1st stage
nozzle may have the following specifications if
required:
• a delivery less than 50% of the total delivery
whenever the back-pressure peak must be re-
duced at the moment of firing: the burner al-
lows good combustion values also with a ratio
40 - 100 % between the 1st and 2nd stage;
• a delivery higher than 50% of the total delivery
whenever the combustion during the 1st stage
must be improved.
(D)
5
RL 70 RL 100 RL 130
250 250 250
385 385 385