Characteristics; Packing Of The Mz; Packing; Storage - WDV Molline MZ Manual De Instrucciones

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.
4
WDV / Molliné GmbH · Mönchstraße 11 · 70191 Stuttgart · Tel. 0711 / 35 16 95 - 20 · Fax 0711 / 35 16 95 - 29 · www.molline.de

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 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.
• (6) Dirt particles may damage the tur-
bine wheel therefore the use of starting
sieve and filter are recommended.