Riello RLS 280/E - Gas Pressure

Installation
31
20106891
GB
4.14.2 Gas pressure
The Tab. O shows minimum pressure losses along the gas supply
line depending on the maximum burner output operation.
The values shown in the Tab. O refer to natural gas (GCV).
Column 1
Pressure loss at combustion head.
Gas pressure measured at the test point 1)(Fig. 24), with:
– combustion chamber at 0” WC;
– burner working at maximum output;
– combustion head adjusted as in the diagram of Fig. 16 on
page 23.
Column 2
Pressure loss at gas butterfly valve 17)(Fig. 3 on page 11) with
maximum opening: 90°.
Calculate the approximate maximum output of the burner as fol-
lows:
– subtract the combustion chamber pressure from the gas pres-
sure measured at test point 1)(Fig. 24);
– find, in the Tab. O relating to the burner concerned, the pres-
sure value closest to the result of the subtraction;
– read off the corresponding output on the left.
Example for RLS 510/E:
• Maximum output operation
• Gas pressure at test point 1)(Fig. 24) = 11.7 “WC
• Pressure in combustion chamber = 2 “WC
11.7 - 2 = 9.7 “WC
An output of 10500 MBtu/hr shown in Tab. O corresponds to
9.7 “WC pressure, column 1.
This value serves as a rough guide, the effective delivery must be
measured at the gas meter.
Tab. O
WARNING
The data of thermal output and combustion
head gas pressure are related to full open (90°)
gas butterfly valve.
Fig. 24
20086798
MBtu/hr ( GCV ) 1 ∆p ("WC) 2 ∆p ("WC)
RLS280
2.600 1,2 0,01
3.500 2,2 0,02
4.500 3,6 0,03
5.500 6,5 0,07
6.500 9,1 0,15
7.500 12,2 0,20
8.500 14,0 0,40
9.500 15,6 0,50
10.500 19,1 0,60
RLS310
3.500 1,2 0,02
4.500 2,0 0,03
5.500 3,0 0,07
6.500 4,2 0,15
7.500 5,9 0,20
8.500 7,6 0,40
9.500 9,5 0,50
10.500 11,8 0,60
11.500 14,0 0,80
12.500 16,5 1,00
13.600 19,5 1,20
RLS410
4.000 1,5 0
5.500 2,8 0
6.500 3,9 0,07
7.500 5,2 0,17
8.500 8,1 0,22
9.500 10,1 0,34
10.500 12,3 0,50
11.500 14,8 0,60
12.500 16,5 0,90
13.500 18,3 1,10
14.500 21,0 1,40
15.500 24,1 1,73
16.100 26,0 2,00
RLS510
5.000 2,2 0,00
6.500 3,7 0,07
7.500 5,0 0,17
8.500 6,4 0,22
9.500 8,0 0,34
10.500 9,7 0,50
11.500 11,7 0,60
12.500 13,8 0,90
13.500 16,1 1,10
14.500 18,6 1,40
15.500 21,2 1,73
17.500 27,0 2,60
18.500 30,2 3,00
19.200 33,8 3,50