3
04.06.2019
explosion-proof duct fan
WP-11/Ex
2.
Application
Duct fans are designed for general ventilation of the rooms, where explosive
atmosphere, (i.e.
mixture of flammable substances in form of gas and vapour with the air, whereby after their
ignition
– in atmospheric conditions
– the burning mass would expand within the whole non-
burning mixture)
is likely to occur.
the whole non-burning mixture)
is likely to occur.
The appliances are meant for installing inside the rooms (indoor application), directly in the
system of round ventilation ducts. They have been constructed for application within tem-
perature range -20 up to 40
C.
The forwarded air must be of dustiness not exceeding 0,3 g/m
3
, without viscous pollutants and
without aggressive compounds, and maximum temperature 6
0
C.
According to
the 1914/34/EC ATEX Directive and
EN ISO 80079-36 the
device carries the level
of protection:
“
HIGH
” – as a device classified for
Group
II
,
Category
2
,
and it can work in areas
where explosive atmospheres are likely to occur.
The fan
can be applied in zones
1
,
2
(
G
).
Specification of the operational zones and the knowledge on hazards caused by atmo-
sphere of explosion risk in those zones
– belongs to operator of the appliance.
The appliance is marked on the nominal data plate:
II 2 G c Ex eb IIB T3
Marking
of
the
operational
conditions
of
the device
:
group / category / hazard / class
.
marking for explosion proof properties of the appliance,
group II
– the device
is
designed
for
on-ground work,
in factories,
in areas
of
explosion
hazard,
but this cannot be methane
(
firedamp
)
hazard
neither carbon dust occurrence,
category 2
– the device is designed
for application in areas where
explosive atmosphe-
res are likely to occur
,
gas hazard G
,
“
c
” – category of protection against the ignition –
constructional protection
,
Ex
– mark of the electrical device –
constructed
and
tested according
to the European Stan-
dards for work in areas of explosion hazard,
execution
“
e
” – type of construction of the motor (a motor of increased safety)
“
b
” – protection by means of controlling the ignition sources,
gas explosion
group
IIB
–
occurring
in on-ground factories
– the fans are constructed accor-
ding to
the PN-EN 14986:2009
, whereby they can be applied for gases in explosion groups
IIA
and
IIB
and
hydrogen
,
temperature
class T3
–
the surface
temperature
of any
part
of the
appliance should
not
ex-
ceed
200ºC
(during the normal operation). The device can be used safely
in explosive at-
mospheres
belonging to temperature classes
T1
,
T2
,
T3
.
3.
Reservations of Producer
A
.
Manufacturer accepts no liability
for any consequences following from the operational use
that is in contradiction to the purpose of application.
B
.
Installing of
any additional elements not belonging to the normal device structure (
or acces
-
sory set) is not acceptable.
C
.
Do not undertake
any structural changes or constructional modifications on the device on
one
’s own.
D
.
Protect the appliance’s housing from mechanical damage.
E
.
Prior to
installing
check the load carrying capacity
of the building structure
where the device
will be mounted. Unsure mounting could cause hazard to personnel/people in vicinity and
effect in damage of the device.
