PART I: INSTALLATION
15
GAS TRAIN CONNECTIONS
This paragraph shows the gas train components which are included in the delivery and those which must be fitted by the customer. The
diagram complies with regulations in force
Key
1 Burner
2 Butterfly valve
3 Gas proving system (option)
4 Low gas pressure switch
5 High gas pressure switch (option)
7 Bellow joint
8 Manual cutoff valve
9 MB-DLE valve group
*Note: the maximum gas pressure switch can be mounted either upstream or downstream the gas valve but upstream the butterfly gas
valve (see item no.4 in the scheme above).
To mount the gas train, proceed as follows:
1)
in case of threaded joints: use proper seals according to the gas used;
2)
fasten all the items by means of screws, according to the next diagrams, observing the mounting direction for each item.
NOTE:
the bellow joint, the manual valve and the gaskets are not part of the standard supply.
The procedures of installation fo the gas valves are showed in the next paragraph.
DANGER! Incorrect motor rotation can seriously damage property and injure people.
ATTENTION:
BEFORE EXE-
CUTING THE CONNECTIONS TO THE GAS PIPE NETWORK, BE SURE THAT THE MANUAL CUTOFF VALVES ARE
CLOSED. READ CAREFULLY THE “WARNINGS” CHAPTER AT THE BEGINNING OF THIS MANUAL.
Gas train with valves group MB-DLE (2 gas pressure governor) + VPS504 gas proving system
ATTENTION:
once the gas train is mounted according to the diagram, the gas proving test mus be performed, 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).
1
2
3
4
5
7
8
9
4
MANUFACTURER
INSTALLER