Gas Pressure - Riello RLS 160/EV Installation, Use And Maintenance Instructions

4.14.1 Gas pressure

The adjacent diagrams are used to calculate manifold pressure
taking into account combustion chamber pressure.
Gas manifold pressure measured at test point 1)(Fig. 32), with:
• combustion chamber at 0" WC;
• burner operating at maximum output;
• Combustion head adjusted as indicated in diagram (Fig. 16,
page 21).
Calculate the approximate high fire output of the burner as follows:
– subtract the combustion chamber pressure from the gas pres-
sure measured at test point 1)(Fig. 32).
– Find the nearest pressure value to your result in Fig. 31.
– Read off the corresponding output on the left.
Example for RLS 200/E
• Maximum output operation
• Natural gas
• Gas pressure at test point 1)(Fig. 32)
• Pressure in combustion chamber
9.2 - 1.2
A maximum output of 8.000 MBtu/hr shown in diagram corre-
sponds to 8" WC pressure.
This value serves as a rough guide, the effective delivery must be
measured at the gas meter.
kW
930
996
1099
1202
1400
1500
1600
1700
1861
2051
1400
1500
1600
1700
1800
1900
2000
2150
2460
* The values are referred to the butterfly gas valve.
The data of thermal output and combustion
head gas pressure are related to full open (90°)
gas butterfly valve.
WARNING
20095042
= 9.2" WC
= 1.2" WC
= 8" WC
p ("WC)*
MBtu/hr
3175 0.35
3400 0.39
3750 0.50
4100 0.63
4780 0.86
5120 1.00
5460 1.15
5800 1.30
6350 1.50
7000 1.65
4775 1.2
5120 1.4
5460 1.6
5800 1.8
6140 2.0
6480 2.3
6874 2.5
7560 3.0
8393 3.8
Installation
RLS 200/E
Tab. M
28 GB
RLS 160/E
Burner output
Burner output
1
D2441
D3188
D9127
Fig. 31
2
Fig. 32