Gas Pressure - Riello RLS 70 Installation Instruction

4.13 Gas pressure

The adjacent diagrams are used to calculate manifold pressure
taking into account combustion chamber pressure.
Column 1
Gas manifold pressure measured at test point 1) (Fig. 25), with:
• Combustion chamber at 0" WC
• Burner operating at maximum output
• Natural gas
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. 25).
– Find the nearest pressure value to your result in column 1 of
the diagram for the burner in question.
– Read off the corresponding output on the left.
Example - RLS 100
• Maximum output operation
• Natural gas
• Gas pressure at test point 1)
(Fig. 25)
• Pressure in combustion chamber
A maximum output of 3616 MBtu/hr shown in diagram RLS 100
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.
6046
Installation
= 4.41" WC
= 0.79" WC
4.41 - 0.79 = 3.62" WC
18
RLS 70
RLS 100
RLS 130
D3204
Fig. 24
1
D2309
2
Fig. 25