4
Installation and assembly
As standard, the device with the connecting port for
connection to pipes and other connection parts,
such as the welding sleeve, union nut with soldering
and welding nipples, is equipped with soldering and
welding nipples (see data sheet MZ...). It can be
mounted to a wall using the wall bracket (see data
sheet MZ...). Manometer screw connections for 10,
8, 6 mm dia. pipes can be supplied for connection
to pipes.The enclosure protection type IP 65 is only
guaranteed, if a suitable power supply cable is
used.
4.1
Process connection
•
By authorized and qualified specialized person-
nel only.
•
Only for the designated mechanical process
connection - for the model, see the order code
on the device type plate.
•
The pipes need to be depressurized when the
device is being connected.
•
Do not mount the device against existing water
columns, and secure suitably against pressure
surges.
•
Use only with media suitable for operation.
•
Observe the maximum pressure.
•
Check that the pressure connections do not
leak before commissioning.
4.2
Electrical connection
•
By authorized and qualified specialized person-
nel only.
•
Disconnect the system from the mains before
connecting the device.
•
Do not take out the connecting plug while ener-
gized
Explosion protection instructions
To guarantee safe operation of the in-
strument, the supply circuit must satisfy
the requirements for zone 2, category 3,
and the locally applicable regulations
and guidelines for the installation and operation of
electrical systems in explosion hazard areas (e.g.
EN 60079-0).
The supply voltage may not exceed 30 V DC. The
supply circuit must be protected by a slow 200 mA
fuse. Only a CE-compliant power supply unit may
be used as a power supply.
4.3
Wiring diagram
Do not take out the connecting plug
while energized
Static electricity
The case must be equipped with an
earth connection to reduce the surface
resistance.
5
Commissioning
•
All electrical supply, operating and measuring
lines, and the pressure connections must have
been correctly installed before commissioning.
All supply lines are arranged so that there are
no mechanical forces acting on the device.
•
If liquid measuring media are used the pressure
connection line must be vented, as liquid col-
umns of different heights in the pipes can cause
measuring errors. The instrument must be pro-
tected against frost if water is used as a medi-
um.
•
The pressure sensing lines must be installed on
an incline so that no condensation pools can
form.
•
The pressure sensing lines need to be kept as
short as possible and installed without sharp
bends to avoid interfering delay times.
•
Appropriate shutoff valves must be provided to
ensure safety during installation, maintenance
and inspection
Three-conductor circuit
output
Signal
Operating
voltage
