VA Master FAM540
METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E
23
Installation instructions
The installation, commissioning, maintenance and repair of
devices in areas with explosion hazard must only be carried out
by appropriately trained personnel.
The operator must strictly observe the applicable national
regulations with regard to installation, function tests, repairs,
and maintenance of electrical devices. (e. g. NEC, CEC).
Intrinsic Safety Control Drawing
Note
For intrinsically safe installations, the FAM540 must be installed
in accordance with the ‘Intrinsic Safety Control Drawing’. See
Intrinsic Safety Control Drawing SDM-10-A0253
on page 63.
Sensor insulation
The device may be insulated. The maximum permissible
thickness of the insulation corresponds to the flange diameter.
Refer to
Sensor insulation
on page 23.
Opening and closing the transmitter housing
DANGER
Danger of explosion if the device is operated with the
transmitter housing open!
Before opening the transmitter housing, bear in mind the
following:
• A valid fire permit must be present.
• Make sure that there is no explosion hazard.
• Switch off the power supply and wait for t > 2 minutes
before opening.
WARNING
Risk of injury due to live parts!
When the housing is open, contact protection is not provided
and EMC protection is limited.
• Before opening the housing, switch off the power supply.
Before opening the housing cover, remove the cover protector,
and reattach it after closing the housing cover.
Only original spare parts must be used to seal the housing.
Note
Spare parts can be ordered from ABB Service.
www.abb.com/contacts
Cable entries
Devices with FM and CSA approval are delivered for electrical
connection using piping systems that have ½“ NPT connection
threads and are sealed with dust protection plugs.
Alternatively, cable glands with ½“ NPT threads can be used for
the connection. National guidelines (NEC, CEC) must be
observed.
For operation in XP ‘Explosionproof’ type of protection, the
installation instructions in ‘
Type of protection XP ‘Explosion
proof’
on page 23’ must be observed.
Type of protection XP ‘Explosion proof’
For operation in the XP ‘Explosionproof’ type of protection, the
connection is made using Ex-approved pipe fittings with a flame
barrier with type of protection XP.
In Group A and B hazardous areas, the flame barriers must be
installed within a distance of 46 cm (18.1 in) from the device.
When using cable glands for the connection, Ex-approved cable
glands with type of protection XP or Ex-d must be used (see
Figure 5).
Note
There must be a separate XP type examination certificate for the
pipe fitting.
The use of standard cable and wire entries and sealing plugs is
prohibited.
The pipe fitting is not included in the scope of supply.
