Publicidad
Idiomas disponibles
Idiomas disponibles
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 proportional to the
linear speed of the gas . The movement is me-
chanically 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 delivered
in an individual carton box or on a wood pal-
let . 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 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:
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 po-
sition .
• (1) Before installation, check visually that the
meter has not been damaged during trans-
port .
• (2) Do NOT weld pipework with a meter in-
stalled .
• (3) The meter should be installed without
stress in the pipework . The flanges must be
correctly lined up . The tightening 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 Meters 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 consideration of the use of Ex marked
equipment or otherwise approved circuits .
For plug assignment and pulse values refer
to the main name plate .
• (6) Dirt particles may damage the turbine
wheel therefore the use of starting sieve and
filter are recommended .
See
Publicidad
