Nozzle Selection; Nozzle Assembly - Riello RLS 70 Installation Instruction

4.5

Nozzle selection

Both nozzles must be chosen from among those listed in (Tab. H).
The first nozzle determines the delivery of the burner in low fire.
The second nozzle combines together with the 1st nozzle to deter-
mine the total firing rate at high fire.
The total firing rates of low and high fire must be contained within
the value range indicated on page 6.
Use nozzles with a 60° spray angle at the recommended pressure
of 174 PSI.
The two nozzles have equal deliveries rates.
4.6

Nozzle assembly

Remove screw 1) (Fig. 9) and extract the nozzle assembly 2). In-
stall both nozzles 1) (Fig. 10), after having removed the plastic
plugs 2) (Fig. 10), fitting the wrench through the central hole in the
flame stability disk or loosen screws 1) (Fig. 11), remove disk 2)
(Fig. 11) and replace the nozzles using the wrench 3) (Fig. 11).
D1122
D1146
Installation
Nozzle
size
5.00
5.50
6.00
6.50
7.00
7.50
8.00
8.30
8.50
9.00
9.50
10.0
10.5
11.0
12.0
12.3
13.0
13.8
14.0
15.0
15.3
16.0
17.0
Do not use any sealing products such as gaskets, sealing com-
pound, or tape. Be careful to avoid damaging the nozzle sealing
seat. The nozzles must be screwed into place tightly but carefully.
The nozzle for low fire operation is the one lying beneath the firing
electrodes (Fig. 12).
Make sure that the electrodes are positioned as shown in (Fig. 12).
Fig. 9
Electrode position (for oil operation)
Fig. 10
13
GPH
145 PSI 174 PSI 203 PSI
6.15 6.79
6.76 7.46
7.4 8.17
8.01 8.84
8.61 9.51 10.34
9.22 10.18 11.08
9.86 10.86 11.82
10.21 11.27 12.26
10.47 11.56 12.55
11.08 12.23 13.29
11.69 12.90 14.03
12.3 13.58 14.76
12.94 14.28 15.49
13.54 14.95 16.23
14.76 16.3 17.71
15.15 16.71 18.16
16.01 17.64 19.18
17.0 18.73 20.27
17.23 19.02 20.65
18.48 20.37 22.16
18.83 20.78 22.57
19.69 21.74 23.63
20.94 23.09
D1147
D2539
MBtu/hr
174 PSI
7.4 951
8.13 1044
8.87 1144
9.61 1238
1331
1425
1520
1578
1618
1712
1806
1901
1999
2093
2282
2339
2470
2622
2663
2852
2909
3044
25.1 3514
Tab. H
Fig. 11
Fig. 12
6046