88
Water & Steam Boilers – Series 2
For Gas, Light Oil, & Gas/Light Oil – Fired Burners
Burner Specification
& Data Sheet
Riello
Gas/Oil Burners
Model RLS
Figure 1 Model RLS28 – 50 dimensions
Figure 2 Model RLS70 – 190 dimensions
Burner Model Number
A
B
C
D
E
F
G
H
I
L
M
Approx. Wt. (pounds)
RLS28
RLS38
RLS50
18.75
18.75
18.75
18.69
18.69
18.69
22.88
22.88
22.88
8.50
8.50
8.50
5.50
5.50
5.50
13.88
13.88
13.88
6.44
6.44
6.44
31.88
31.88
31.88
4.25
4.25
4.25
6.63
6.63
6.63
1.50
1.50
1.50
95
99
101
A
B
C
D
E
F
G
H
I
L
M
N
O
Burner Model Number
Approx. Wt. (pounds)
RLS70
27.50
28.88
28.88
11.38
12.75
12.75
16.13
16.13
16.13
21.88
21.88
21.88
33.13
33.13
33.13
9.88
7.06
7.06
7.44
16.94
45.75
45.75
45.75
8.44
8.44
8.44
5.31
5.31
5.31
8.75
8.75
8.75
2.00
2.00
2.00
159
165
170
RLS100
RLS130
9.88
9.88
16.94
16.94
Part No. 550-142-023/0508
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Burner Specification & Data sheet — Riello Gas/Oil Burners
Burner specifications and settings (continued)
Table 2
Burner data — #2 Fuel oil/Natural gas — Modulating
Boiler Model
Number
Burner Input
Positive
Pressure in
Firebox
Standard Burner
Model Designation
Standard
Combustion
Control
Standard Control
System
Burner Motor
3400 RPM
Standard Motor
Voltage
No. 2 Oil
Gas
GPH
MBH
996
Inches W.C
0.89
1.00
0.84
0.72
0.65
0.85
0.80
0.80
0.82
0.82
0.82
0.81
0.89
0.86
0.86
0.863
0.83
Note 16
Gas/Oil
H.P.
1/2
488R
488
6.90
RLS28
RLS28
LFL 1.335
LFL 1.335
LFL 1.335
LFL 1.335
LFL 1.335
LFL 1.335
LFL 1.335
LFL 1.335
LFL 1.335
LFL 1.335
LFL 1.335
LFL 1.335
LFL 1.335
LFL 1.335
LFL 1.335
LFL 1.335
LFL 1.335
LHL/LHL
LHL/LHL
LHL/LHL
LHL/LHL
LHL/LHL
MOD/LHL
MOD/LHL
MOD/LHL
MOD/LHL
MOD/LHL
MOD/LHL
MOD/LHL
MOD/LHL
MOD/LHL
MOD/LHL
MOD/LHL
MOD/LHL
120/60/1
120/60/1
120/60/1
3 phase*
3 phase*
3 phase*
3 phase*
3 phase*
3 phase*
3 phase*
3 phase*
3 phase*
3 phase*
3 phase*
3 phase*
3 phase*
3 phase*
7.00
1010
1357
1703
2049
2396
2482
2713
2887
3103
3392
3753
4113
4474
4763
4979
5124
1/2
588
9.40
RLS38
1/2
688
11.80
14.20
16.60
17.20
18.80
20.00
21.50
23.50
26.00
28.50
31.00
33.00
34.50
35.50
RLS50
3/4
788
RLS50
3/4
888
RLS70
1 1/2
1 1/2
1 1/2
1 1/2
2 1/2
2 1/2
2 1/2
2 1/2
3
988R
988
RLS70
RLS70
1088R
1088
1188
1288
1388
1488
1588
1688R
1688
RLS70
RLS100
RLS100
RLS100
RLS100
RLS130
RLS130
RLS130
RLS130
3
3
3
*208/60/3, 240/60/3, 480/60/3, 575/60/3 burner motor voltage must be specified
Table 3
Gas control components and sizes
Boiler
Model
Number
Manual
Hand Valve
Low Gas
Pressure Switch
Gas
Operating
Gas Valve
Operating Gas
Valve (with Proof Of
Closure)
Safety
Gas Valve
Manual
High Gas
Pressure Regulator
Checking Gas Valve Pressure Switch
Inches
1 1/2
2
Inches
1 1/2
2
Inches
1 1/2
2
Inches
1 1/2
2
Inches
Standard
Standard
Standard
Standard
Optional
Optional
Optional
Optional
1 1/2
2
Standard
Standard
Standard
Standard
488R – 588
688 – 1088
1188 – 1288
1388 – 1688
2 1/2
3
2 1/2
3
2 1/2
3
2 1/2
3
2 1/2
3
Notes for Table 1, Table 2 and Table 3 (continued)
be driven to both low fire and high fire positions, prevent start up if 21. Burners listed by Underwriters Laboratories,Inc.,state of Connecticut,Fire
pre-ignition interlocks are open and has low fire start proven circuit.
In the event pre-ignition interlock circuit or running interlock circuit
does not “prove”, system will lock out on safety. Ultra violet sensitive
electronic flame detector is standard.
Marshal state of Massachusetts, city of New York MEA, and others.
22. Special controls can be provided to meet other code requirements not listed.
Consult your local Weil-McLain distributor/agent or sales office.
23. Electric gas pilot will be furnished as standard equipment on all combina-
tion gas/light oil units.
24. Direct spark ignition is available as an option for combination gas/light oil
units. Consult your local Weil-McLain distributor/agent or sales office.
17. Other flame safeguards available upon request.
18. Control circuit transformer is available as an option.
19. Airflow safety switch is standard for all gas and combination gas/light
oil units.
20. Burners will be completely assembled and wired (except gas train) and
factory test-fired.
Part No. 550-142-023/0508
3
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Weil-McLain 88 Water and Steam Boilers — Series 2 — For Gas, Light Oil, & Gas/Light Oil-Fired Burners
4
Part No. 550-142-023/0508
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