Honeywell 11255 - Manual (Page 90)

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1.0General
1.1 Alpha Cell HEPA filters shall be extended media
(separator type) (Pureform separatorless type)
filters as manufactured by Flanders.
1.2 Filter sizes, capacities and construction options
shall be as scheduled on the drawings.
1.3 Filters shall be (UL 900 Class 1)( UL 900 Class
2) listed.
2.0 Filter Construction
2.1 The filter pack shall be constructed by pleating a
continuous sheet of non-woven water-resistant
fiberglass media around hemmed-edge corru-
gated aluminum separators. (or) The filter pack
shall be constructed by pleating a continuous
sheet of formed, corrugated medium so that the
pack is self-supporting without the use of spac-
ers of any kind, including separators, tape
strings, adhesives or strips of media.
2.2 The filter pack shall be sealed into a (galvaneal)
409 stainless steel) (304 stainless steel) (parti-
cle board) (fire-retardant particleboard) (fire-
retardant
plywood) frame with a fire
retardant(polyurethane foam) ( solid urethane)
sealant. (Steel frames shall be 16 ga.)(Wood
frames shall be 3/4” thick.)
2.3 (A 40-durometer closed-cell neoprene gasket)
(Silicone jel in a channel) shall be provided on
one or more sides to seal the filter in the mount-
ing device.
3.0 Performance
3.1 Initial and final resistances shall not exceed the
scheduled values.
3.2 Alpha Cell HEPA Filters shall have a minimum
efficiency of 99.97% on 0.30 micrometer parti-
cles when tested at rated capacity on a Q-107
Penetrometer Each filter shall be challenged
with an approved nearly monodispersed oil
aerosol of 0.30 micrometer size.Measure the
upstream
and down stream concentration of
these particles with a light scattering photometer,
determine the penetration and calculate the effi-
ciency.
3.3 Alpha Cell Scan Tested HEPA Filters shall have
a minimum efficiency of 99.99% on 0.30 microm-
eter particles. Scan Testing shall be in accor-
dance with Section 6.2 of IEST-RP-CC034.1.
The scan test shall consist of challenging the fil-
ter with a high concentration of an approved oil
aerosol or PSL Spheres. Utilizing a photometer
or particle counter, the media pack and the pack-
to- frame seal shall be scanned to insure that
there are no leaks greater than .01% of the
upstream concentration at 100 fpm face velocity
Guide Specifications
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