– Depression > 19 kPa (2.75 psi)
CAUTION: Customers take full responsibility for using an explosion-protected vacuum cleaner
accor
ding to zone classification and risk analysis, carried out by the customer, to avoid the risk of
an explosion.
● The equipment and accessories must be properly grounded at mains outlets only; do not
manipulat
e internal bonding. If static discharges or electrical sparks are noticed, stop operation,
disconnect the equipment, and contact your support representative.
● Check the air filters and the sealing of the heating lamps regularly, as specified in
Hardware
maintenance on page 97. Do not remove filters or lamp glasses.
● Use HP-certified and HP-branded material and agents only. Do not use unauthorized third-party
mat
erial or third-party agents.
● HP recommends the use of HP accessories for unpacking 3D parts and refilling the build chamber. If
o
ther methods are used, read the following notes:
– Dust clouds generated during handling and/or storage can form explosive mixtures with air.
Dus
t explosion characteristics vary with the particle size, particle shape, moisture content,
contaminants, and other variables.
– Check that all equipment is properly grounded and installed to satisfy electrical classification
r
equirements. As with any dry material, pouring this material or allowing it to fall freely or
be conveyed through chutes or pipes can accumulate and generate electrostatic sparks,
potentially causing ignition of the material itself, or of any flammable materials which may come
into contact with the material or its container.
● Material storage, handling, and disposal as per local laws. See the Safety Data Sheets at
http://www.hp.com/go/msds for adequate handling and storage. Follow your Environmental, Health,
and S
afety processes and procedures.
● Do not place the equipment in a hazardous location area, keep separated from other equipment
that could cr
eate a combustible dust cloud during its operation.
● Auxiliary post-processing equipment, such as for sand blasting, must be suitable for combustible
dus
t.
● Stop operation immediately if sparks or material spillages are seen, and call your HP service
r
epresentative before continuing.
● All personnel, when handling combustible dust, should be freed from static electricity by using
conduc
tive or dissipative footwear and clothing, and a conductive floor.
● Users and operators must be trained for explosive atmospheres and associated hazards during
cleaning oper
ations, according to local laws and company requirements.
● Keep the safety lid on top of the build unit at all times, except when it is inside the printer or
pr
ocessing station.
● Use powder complying with HP guidelines, as follows:
– Explosion characteristics acceptance criteria
○ Minimum Ignition Temperature (MIT) 360°C or higher
○ Layer Ignition Temperature (LIT) 375°C or higher
Explosion hazard 7
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