Vertiv Liebert PCW - Page 52

E - 3
Enclosure E - Accessories
Liebert PCW - UM - 273895 - 04.10.2018
E.6. Vertical ow extension hood E.7. Hood with high e󰀩ciency air lter
An extension hood can be supplied on request and can be installed
on top of the unit. It is available with di󰀨erent height: 500 mm; 600
mm; 700 mm; 800 mm. It has the same design as the unit and
consists of sandwich panels lined with non-ammable insulation
material of class 0 (ISO 1182.2), density 30 kg/m
3
.
Optional high e󰀩ciency lters, ltration class F6, F7 and F9 in ac-
cordance 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.
E.8. Plenum with silencing cartridges E.9. Horizontal hood with grill
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.
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 deection grill.