Honeywell 11255 - Manual (Page 99)

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Pureflo-FPM
Fan-Powered Terminal Filter Modules
Standard: PF-FPM*-xxxx-STD Room Side: PF-FPM*-xxxx-RSR
(Where * is efficiency designator of 493 for 99.99% efficient on .3 micron
particles and 591 is 99.9995% efficient on .12 micron particles.)
General
Pureflo-FPM Fan-Powered Terminal HEPA/ULPA
Filter Modules are lightweight unitized low profile
units consisting of a fan/motor assembly and a
minipleat HEPA/ULPA filter pack, designed to pro-
vide unidirectional vertical airflow from tee-bar ceil-
ings. The modules are available in two sizes: nom-
inal 24” x 24” and 24” x 48”; and in two types: a
standard replaceable unit and a room side replace-
able (RSR) unit. Module efficiencies are 99.99% on
0.3 micron particles or 99.9995% on 0.12 micron
particles.
Options
• Nominal 10” or 12” duct collars for conditioned air
• UL Class 1 dimple pleat HEPA filter
• 25-30% efficient pleated prefilter
• Power cord for 115V modules
• 220V 50/60 Hz fan motor
• 277V 60 Hz fan motor
• Integral dual polarity DC air ionizing bar
• Neoprene Gasketed RSR filter pack
• Power indicator light
Application and Installation Considerations
Pureflo-FPM modules are recommended for use in
clean- room applications for fabrication of micro-
electronics, semiconductors, and medical devices.
The filters in standard modules are table-top
replaceable with the entire unit removed from the
ceiling. The filters in room side replaceable (RSR)
modules have an integral extruded channel filled
with cleanroom quality sealing gel. The filters are
clamped into the fan plenum against a continuous
knife edge that is embedded into the gel for a
leakproof seal. Removal of the filter does not dis-
turb the enclosure. Neoprene gasketed filters are
available as an option. Modules include threaded
inserts with 1/4” eyebolts at each top corner for the
attachment of seismic restraint wires. Polyfoam
gasket material should be applied to the tee-bar
surfaces on which the modules rest.
Performance
Pureflo-FPM modules produce HEPA or ULPA fil-
tered air at a velocity of 90 fpm + 15 fpm six inches
below the filter face. When using the solid state
speed control, the sound level 30 inch from the fil-
ter face is approximately 53 dbA (nc45) at a 90 fpm
average face velocity and an ambient sound level
of 25 dbA.
Construction
HEPA filter: Separatorless minipleat with water-
resistant microfine fiberglass media 2.1” (53 mm)
on STD models, and 2.76” (70 mm) on RSR
models.
Fan Housing: Mil finish .063” aluminum
Protective Grille: Expanded 20 ga. steel, white pow-
der-coated
Prefilter: Washable 20 ppi foam (pleated prefilter
optional)
Integral Fan/Motor Assembly: Backward-curved fan
with sealed bearings, direct-driven by a 115 volt
single phase 1/3 HP PSC continuous duty ther-
mally protected motor.
Speed Control: A solid state speed control is also
standard on all voltages
Important Features
• Extremely quiet fan/motor assembly
• HEPA/ULPA filters are replaceable
• Filters are scan-tested after assembly to meet or
exceed IEST RP-1 requirements for Type C and F fil-
ters
• Minipleat separatorless filter pack for a lightweight
and low profile design
• UL listed as a complete unit
the filter and hvac store