ITRON MTZ, Инструкция по эксплуатации, Страница: 4 / 44

4
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 propor-
tional to the linear speed of the gas . The
movement is mechanically transmitted to
the totaliser through the magnetic cou-
pling . Detailed characteristics are given in
Annex 1
2 Packing of the MZ
2.1 Packing
The meter, depending on the size is de-
livered 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 installed .
2.2 Storage
If the meter is not going to be used imme-
diately, it should be stored under cover in
a clean, dry environment . The caps fitted
at the inlet and the outlet pipe must stay
in place until installation . Storing tempera-
ture: -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 .
3 Installation
3.1 General recommendations:
See Annex 2 and PED information
in Annex 6
• 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 installation
position .
• (1) Before installation, check visually that
the meter has not been damaged during
transport .
• (2) Do NOT weld pipework with a meter
installed .
• (3) The meter should be installed with-
out stress in the pipework . The flanges
must be correctly lined up . The tighten-
ing torque of the bolts must not exceed
(Nm):
M16 M20
85 170
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 me-
ters need to be made with consideration
of the use of Ex marked equipment or
otherwise approved circuits . For plug as-
signment and pulse values refer to the
main name plate .