Honeywell 11255 - Manual (Page 75)

75
General
Flanders models MS and MSG Moisture
Separators are designed for use in air handling sys-
tems requiring collection of water droplets or oil
mist. Water droplets in outside air are usually fog.
In supply air, water droplets may occur as carry
over from cooling coils and evaporative media or
unevaporated moisture downstream of humidifiers.
Oil mist in return air is most often found in produc-
tion machine shops.
Application
The optimum face velocity for MS and MSG
Moisture Separators is 500 fpm, and at this point
they are 98% efficient on 20 micrometer liquid
droplets. Performance is relatively unchanged in
the recommended range of 450 fpm to 550 fpm.
Above 550 fpm captured liquid may be re-entrained
in the airstream.
The system designer must recognize that moisture
separators will also act as low efficiency particulate
prefilters and that the separator bank pressure drop
will increase over time. System static pressure cal-
culations for fan selection should include an
allowance of at least 0.50 inch w.g. final static pres-
sure for dirty wet moisture separators.
Models MS and MSG Moisture Separators are
meant to be installed with their pleats vertical so
that collected liquid will drain easily to the bottom of
the frame and out through five 3/8” diameter holes.
The top of the frame has an arrow to guide the
installer as to the proper air flow direction and posi-
tion for proper drainage
Installation Considerations
In a mixed air (outside air/return air) system, place
the Moisture Separators in the outside air duct if
possible. Otherwise, place them as the first filtra-
tion stage ahead of the particulate filters.
Moisture Separators may be installed in built-up
banks using Flanders Type 9 Holding Frames or in
Flanders Side Access Housings specially equipped
with drain tubes. When built-up banks are used,
field-fabricated water drain pans should be installed
between each horizontal row of frames.
For banks four or five separators wide, locate 3/4”
I.D. downspouts at each end. For banks six sepa-
rators wide or wider, locate downspouts at each
end and proportionately along the width of the
bank, one for every six separators or a fraction
thereof. Example: a six separator wide bank would
have downspouts at both ends and one in the mid-
dle; an eight separator wide bank would have
downspouts at both ends and two more proportion-
ately spaced along the width of the bank. If not indi-
vidually trapped, the downspouts should be mani-
folded to a 1” I.D. or larger collector with a trap of a
depth exceeding the negative pressure expected in
the plenum where the separator bank is located.
Sureseal two-stage Side Access Housings may be
special-ordered with the 2” tracks fitted with drain
tubes to hold both Moisture Separators and partic-
ulate final filters. If the 2” tracks are to be used for
2” prefilters, a Surepleat single-stage Side Access
Housing with drain tube should be selected and
located upstream of the particulate filter housing.
MS/MSG
Moisture/Oil Mist Separators
MS Models: MS-xxxxx
MSG Models: MSG-xxxxx
Important Features
• Efficiency of 98% on 20 micrometer liquid
droplets at 500 fpm
• Corrosion-resistant construction
• Nominal 2” thick for application flexibility
• Models for both built-up banks and side
access housings
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