PART II: INSTALLATION
17
3.0 GAS TRAIN CONNECTIONS
Referring to the P&ID of the burner, execute the connection.
3.1 Assembling the gas train
Fig. 5 - Example of gas train
To mount the gas train, proceed as follows:
1-a) in case of threaded joints: use proper seals according to the gas used;
1-b) in case of flanged joints: place a gasket (no. 1A..1E - Fig. 5) between the elements
2)
fasten all the items by means of screws, according to the diagrams showed, observing the mounting direction for each item;
NOTE:
the bellows unit, the manual cutoff valve and the gaskets are not part of the standard supply.
The procedures of installation fo the gas valves are showed in the next paragraphs, according to the gas train used:
z
threaded gas trains with Siemens VGD20.. / Multibloc Dungs MB-DLE
z
flanged gas trains with Siemens VGD40..
3.2 MULTIBLOC DUNGS MB-DLE 415..420
Mounting
1. Loosen screws A and B
do not
unscrew (Fig. 6 - Fig. 7).
2. unscrew screws C and D (Fig. 6 - Fig. 7).
3. Remove MultiBloc between the threaded flanges (Fig. 7).
4. After mounting, perform leakage and functional tests.
WARNING: BEFORE EXECUTING THE CONNECTIONS TO THE GAS PIPE NETWORK, BE SURE THAT THE
MANUAL CUTOFF VALVES ARE CLOSED.
ATTENTION: once the gas train is mounted according to the diagram on Fig. 5, 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).
1A
5
1B
4
1C
2
1D
1E
3
Keys
1A..1E
Gasket
2
Gas filter
3
Gas valves group
4
Bellows unit
5
Manual valve
”direction” arrows for installation
gas supply network
