6.3.9 Electrical system
Personnel:
Skilled qualified electrician for Ex areas
HVAC technician
Protective equipment:
Industrial safety helmet
Protective clothing
Protective gloves
Safety shoes
Before commissioning, the electrical system has to be
tested according to IEC 60364-6 (VDE 0100-600). As
part of this test, all contacts have to be checked for cor-
rect seating. This applies in particular to motor terminal
blocks, fuses, local isolators and equipotential bonding.
6.4 Starting the air handling unit
6.4.1 Before you start the AHU
WARNING!
Risk of explosion!
Before the system can be commissioned, a qualified
person or expert has to examine the system to
ensure that it complies with the ATEX directive. The
result of the examination has to be documented.
Before you switch on the air handling unit, make sure
that the following requirements have been met:
Has the air handling unit been checked for damage?
Have the transport protection devices been
removed?
Have the filters been inserted?
Have all inspection access doors and openings
been adjusted and closed?
Have all ducts in the AHU been connected?
Have the AHU and the connected ducts been tested
for any leaks?
Has the interior of the air handling unit been
cleaned?
Have all drain traps been filled with water?
Does the supply of power and of operating fluids
meet all requirements?
Has all the safety equipment been installed? Does it
work properly?
Have all the electrical connections been made and
secured according to the relevant national stand-
ards?
Have all equipotential bonding measures been
installed and checked?
Has the heating coil/cooling coil been correctly con-
nected and filled?
Has the centrifugal fan been set up?
Have the multileaf dampers been set up?
Has the sound attenuator been set up?
Has the run around coil system been correctly filled?
Has the plate heat exchanger been set up?
Are the environmental conditions for correct use
being met?
WARNING!
Risk of explosion from casing leakage!
The unavoidable casing leakage that comes with
operation may lead to a potentially explosive atmos-
phere outside of the air handling unit (zonal disper-
sion).
If the installation room (i.e. the space in the vicinity of
the AHU) has not been defined as an Ex zone,
ensure that it is sufficiently ventilated.
6.4.2 Starting
Personnel qualified to start the air handling unit
Only specially trained individuals must start the air han-
dling unit.
Follow the instructions in the operating manual for the
air handling unit.
If the unit is not fitted with integral controls, i.e. if the
controls have been supplied by others, follow the
instructions of the supplier.
Initial commissioning
Starting the air handling unit > Starting
Air handling unit X-CUBE Ex
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