Gas Pressure - Riello RLS 100/E Installation, Use And Maintenance Instructions

4.13.1 Gas pressure

The adjacent diagram is used to calculate manifold pressure taking
into account combustion chamber pressure.
Gas manifold pressure measured at test point 1)(Fig. 26), with:
• combustion chamber at 0 " WC
• burner operating at maximum output
• Combustion head adjusted as indicated in diagram (Fig. 37)
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. 26).
– Find the nearest pressure value to your result in Fig. 25.
– Read off the corresponding output on the left.
Example
• Maximum output operation
• Natural gas
• Gas pressure at test point 1)(Fig. 26)
• Pressure in combustion chamber
4.41 - 0.79
A maximum output of 3616 MBtu/hr shown in Tab. K corresponds
to 3.62" WC pressure, column 1, natural gas.
This value serves as a rough guide, the effective delivery must be
measured at the gas meter.
Model MBtu/hr
2646
2878
3125
3371
3616
3863
4109
4396
3500
3800
4130
4430
4730
5030
5290
= 4.41" WC
= 0.79" WC
= 3.62" WC
p (" WC)
1 2
3.15 0.3
3.27 0.4
3.39 0.4
3.50 0.5
3.62 0.5
3.70 0.7
3.82 0.7
3.94 0.9
3.65 0.6
3.7 0.7
3.8 0.9
3.9 1.0
4.05 1.1
4.25 1.3
4.29 1.4
Installation
RLS 100/E
RLS 130/E
20097683
Tab. K
25 GB
Burner output
D11172
Burner output
D11638
Fig. 25
1
2
Fig. 26
20095062