Servicing Cartridge Media; Servicing Optional Return Air Safety Filters (Hepa/Ashrae) - Parker SFC Owner's Manual

5.5 Servicing Cartridge Media

Before replacing cartridges, try down time (fan off) to see if system
recovers. If upon restart, collector S.P. is 2-1/2" (63 mmAq) to 3"
(76 mmAq) and it takes several days to work back up to over 5"
(127 mmAq), there is still "life" left in the cartridges. If upon restart,
4 hours later S.P. is back over 5" (127 mmAq), it is time to change
out the cartridges.
5.6 Servicing Optional Return Air Safety Filters
(HEPA/ASHRAE)
Periodically check the pressure drop across the return air safety fil-
ters. Replace when the differential pressure drop exceeds 2" w.g. (51
mmAq) for ASHRAE filters and 3" w.g. (76 mmAq) for HEPA filters.
CARTRIDGE FILTER
ProTura Nanofiber
®
ProTura Nanofiber-FR
®
ProTura Nanofiber, Wide Pleat
®
ProTura Nanofiber-FR, Wide Pleat
®
ProTura SB Nano
®
ProTura SB Nano, Wide Pleat
®
Poly-Fiberglass-W
Spun-bond-P
Spun-bond-T
PARKER PART NUMBER
33-10089
33-10089-1
33-10089-5
33-10089-15
NF20782
NF20781
1212667
1212669
1212671
TABLE 2
Cartridge Filters
26
GENERAL DESCRIPTION
OF FILTER MEDIA
ProTura Nanofiber layer on cellulose
®
ProTura Nanofiber layer on cellulose
®
with fire retardant material treatment
Half the media quantity of
the ProTura Nanofiber filter
®
Half the media quantity of
the ProTura Nanofiber-FR
®
ProTura Nanofiber layer on 100% synthetic
®
ProTura Nanofiber layer on 100% synthetic
®
Mixture of polyester and
fiberglass fibers
Spun-bond polyester fibers
Spun-bond polyester fibers
with PTFE surface membrane