Characteristics; Packing Of The Mz; Packing; Storage - ITRON MZ Mode D'emploi

Keep this manual easily accessible for all
users. Please respect all national rules for
installation, operation and service of gas
meters.

1 Characteristics:

Turbines gas meters are flow meters. The
flow of gas turns a turbine wheel and the
rotating speed of the turbine is proportio-
nal to the linear speed of the gas. The mo-
vement is mechanically transmitted to the
totaliser through the magnetic coupling.
Detailed characteristics are given in
Annex 1

2 Packing of the MZ

2.1 Packing

The meter, depending on the size is deli-
vered in an individual carton box or on a
wood pallet. The packaging contains the
plugs for the installed transmitters and
the lubricant when an oil pump is instal-
led.

2.2 Storage

If the meter is not going to be used im-
mediately, it should be stored under co-
ver in a clean, dry environment. The caps
fitted at the inlet and the outlet pipe must
stay in place until installation. Storing
temperature: -40 °C to +70°C.

2.3 Handling

Meters should be handled with care. They
must be lifted only with belts around the
main body or on the eyelets.
4

3 Installation

3.1 General recommendations:
See Annex 2
• The standard MZ is designed for use
with clean and non-aggressive gases.
For use with aggressive gases please
contact Itron for special versions.
• If the meter is equipped with an oil
pump, turn oil tank according to the in-
stallation position.
• (1) Before installation, check visually
that the meter has not been damaged
during transport.
• (2) Do NOT weld pipework with a me-
ter installed.
• (3) The meter should be installed with-
out stress in the pipework. The flanges
must be correctly lined up. The tigh-
tening torque of the bolts must not ex-
ceed (Nm):
M16 M20 M24 M27 M30 M33 M36
85 170 290 400 550 700 1200
Please tighten bolts in opposite pairs.
• (4) To ensure accuracy, The meter has
to be installed with an inlet straight pipe
of 3 DN minimum.
• (5) Transmitters connection: Gas Me-
ters are often installed in areas where
there is a risk that Gas will be present.
Therefore, electrical connections to
meters need to be made with conside-
ration of the use of Ex marked equip-
ment or otherwise approved circuits.
For plug assignment and pulse values
refer to the main name plate.
• (6) Dirt particles may damage the tur-
bine wheel therefore the use of starting
sieve and filter are recommended.