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GAS TRAIN CONNECTIONS
The diagrams show the components of the gas trai included in the delivery and which must be
fitted by the installer.The diagrams are in compliance with the current laws.
Procedure to install the double gas valve unit:
- two (2) gas flanges are required; they may be threaded or not depending on size;
- first step: install the flanges to prevent the entry of foreign bodies in the gas line;
- on the gas pipe, clean the already assembled parts and then install the valve unit;
- check gas flow direction: it must follow the arrow on the valve body;
- VGD20: make sure the O-rings are correctly positioned between the flanges and the valve;
- VGD40 and MBE: make sure the gaskets are correctly positioned between the flanges;
- fasten all the components with screws, according to the following diagrams;
- make sure bolts on the flanges are properly tightened;
ATTENTION: once the gas train is mounted according to the diagram on Fig. 1, the gas proving test mus be per-
formed, according to the procedure set by the laws in force.
ATTENTION: it is recommended to mount filter and gas valves to avoid that extraneous material drops inside the
valves, during maintenance and cleaning operation of the filters (both the filters outside the valves group and the
ones built-in the gas valves).
WARNING: before executing the connections to the gas pipe network, be sure that the manual cutoff valves are
closed.
Gas train with valves group MB-DLE (2 valves + gas filter + pressure governor) + VPS504 gas proving system
Key
1
Filter
2
Pressure switch - PGMIN
3
Safety valve with built in gas governor
4
Proving system (*optional)
5
Pressure switch - PGMAX (*optional)
Gas train with valves group VGD with built-in gas pressure governor + gas proving system VPS504
GAS INLET
6
Butterfly valve
8
Main burner
9
Bellows unit(*optional)
10
Manual valve(*optional)
GAS INLET
17
PART II: INSTALLATION
BY OTHERS
BY BURNER CONSTRUCTOR
BY OTHERS
SUPPLIED BY BURNER
CONSTRUCTOR
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