Gas Feeding; Gas Feeding Line; Gas Train - Riello RX 2500 S/E Installation, Use And Maintenance Instructions

4.11 Gas feeding

Explosion danger due to fuel leaks in the presence
of a flammable source.
Precautions: avoid knocking, attrition, sparks and
heat.
Make sure that the fuel interception tap is closed
before performing any operation on the burner.
The fuel supply line must be installed by qualified
personnel, in compliance with current standards
and laws.
WARNING

4.11.1 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 (on the burner)
9 Burner
10 Maximum gas pressure switch (on the burner)

4.11.2 Gas train

The gas train is type-approved according to standard UL 795 and
is supplied separately from the burner.
We recommend using the Siemens valve: VGD40.065U
Disconnect the electrical power using the main sys-
tem switch.
DANGER
Check that there are no gas leaks.
Beware of train movements: danger of crushing of
limbs.
Make sure that the gas train is properly installed by
checking for any fuel leaks.
See the accompanying instructions for the adjust-
ment of the gas train.
WARNING
Installation
D2438
The gas train can enter the burner from the right or left side, de-
pending on which is the most convenient.
 The gas train must be connected to the gas attachment 1)
(Fig. 21) 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 (col-
our of the spring).
See the accompanying instructions for the ad-
justment of the gas train.
WARNING
23 GB
D722
GAS PILOT LINE
MAIN GAS LINE
Fig. 20
Fig. 21
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