Gas Supply; Gas Train; Gas Feeding Line - Riello RS 250/EV Installation, Use And Maintenance Instructions

Forced draught gas burner, progressive two stage or modulating operation.
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4.9

Gas supply

4.9.1

Gas train

 The gas train is type-approved according to standard UL 795
and is supplied separately from the burner.
 The gas train can enter the burner from the right or left side,
depending on which is the most convenient.
 The gas train must be connected to the gas attachment 1)
(Fig. 19) with the flange 2), the gasket 3) and the screws 4)
supplied with the burner.
 The gas solenoids must be as close as possible to the burner,
to ensure that the gas reaches the combustion head within the
safety time of 3s.
 Ensure that the maximum pressure necessary for the burner is
included in the calibration field of the pressure regulator
(colour of the spring).
See the accompanying instructions for the adju-
stment of the gas train.
WARNING
4.9.2

Gas feeding line

It must be type-approved according to required standards and is
supplied separately from the burner.
Key (Fig. 20)
1
Gas input pipe
2
Manual valve
3
Pressure regulator
4
Minimum gas pressure switch
5
1st safety shut off valve
6
2nd safety shut off valve
7
Standard issue burner with flange gasket
8
Gas adjustment butterfly valve (*)
9
Burner
10 Maximum gas pressure switch (*)
(*) On the burner
Installation
D2438
23
GB
D722
Fig. 19
GAS PILOT LINE
MAIN GAS LINE
Fig. 20
20044771

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