Enclosure E - Accessories
E - 2Liebert
®
PDX, EconoPhase Version - UM - 265133 - 29.08.2019
E.5 Hood with high eciency air lter E.6 Plenum with silencing cartridges
Optional high eciency lters, ltration class F6, F7 and F9 in
accordance with the CEN EN 779 standard, are made of berglass
lter media. The lters are placed in ”V” sections with a solid
external frame in polypropylene and can withstand remarkable
pressure and ow variations. These lters will be installed within an
additional duct on the unit top.
Note:
In downow units it is required a ange 50 mm high to connect the
hood to the unit (see E.10).
These are special cartridges made of self - extinguishing material
with a high noise attenuation capacity. They are guaranteed against
disintegration and release of particles do to friction of the air.
Despite a small additional pressure drop, these cartridges provide
a remarkable sound power level reduction.
Note:
In downow units it is required a ange 50 mm high to connect the
plenum to the unit (see E.10).
E.7 Horizontal hood with grill E.8 Floor tiles support kit
A supply plenum with horizontal air ow can be installed on top of
the unit. The 600 mm high plenum has the same design as the unit;
it consists of sandwich panels lined with non-ammable insulation
material of class 0 (ISO 1182.2), density 30 kg/m
3
. It is equipped
with a double deection grill.
Floor tiles support kit can be supplied on request to support tiles
around Liebert
®
PDX Downow Down, when installed with a raised
oor. Floor tiles support is xed on the unit frame/fan module
and allows to support tiles until 40 mm thickness. With a correct
installation, the maximum admitted vertical distributed load on the
perimeter is 180 kg/m.
I.e.: on the lateral side, 870 mm long, the maximum admitted
distributed load is 157 kg. Floor tiles support is earthed with the
unit frame. Follow local rules for system grounding.
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