Operating instructions

GENERAL
INFORMATION
-
Continued
MAKE.UP
AIR
Recommended
quantities
of clean
outdoor
ventila-
tion air
for
various
applications
are
described
in
Table
2
of the
ASHME
Standard
62-89'Ventilation
for
Acceptable
Indoor
Air Quality.'
ASHRAE
(American Society
of
Heating,
Refrigerating,
and
Air
Conditioning
Engineers,
Inc.,
Phone
#404-636-
84OO)
notes
that
these
recommended
outdoor
air
quantities
may
be reduced
by the
use of clean,
recirculated
air
if the IAQ
Procedure
6.2 is used
Appendix
E
of
ASHME
62-89
includes
recom-
mendations
for
the use
of
clean
recirculated
air'
However,
in most
cases,
adequate
controlof
car-
bon
dioxide
generally requires
a
minimum
clean
orrtdoor
air
quantity
of
no
less
than
15
cubic
feet
of air
per
minute
Per
Person.
Additional
ventilation
may
be
required
for toxic
con-
taminants.
In any
event,
the air
cleaner
must
be
used
only
in
areas
which
are
ventilated
for human
occupancy
in order
to
disipate
any incidental
gen-
eration
of
ozone,
SIZING
Electronic
air cleaners
are
generally
best
sized
according
to
the use
of
the area
and the
volume
of
the room
(Air
Changes
per
Hour
Method).
Secondary
factors
to
consider
in
applying
elec-
tronic
air
cleaners
include:
-type
of
contamination
-number
of occupants
-olrtside
air
quality
-anticipated
fan setting
-rate
of contaminate
generation
By
considering
these
factors,
the
number
of air
cleaners
required
can
be
adjusted
up
or down
to
account
for abnormalities
in operating
conditions.
Follow
Steps
1 through
4
to
determine
the
number
of air cleaners
required:
Steo
1
-
Measure
the length,
width,
and
height
of the
room in
feet.
Step 2
-
Determine
the Air
Changes
per
Hour
required.
See
Chart A
below.
Steo
3
-
Determine
the
C.F.M.
(Cubic Feet
per
Minute
of Aifl.
See
Chart
B below.
Steo
4
-
Plug the
figures
from
Steps
1-3
into
the
sizing
formula
below and calculate
the
number
of
air
cleaners
required.
SIZING
FORMUI.A
L x
W x
H of Room
x Air
Changes
/
Hr.
:
#
ol
C-12's
C.F.M.
of Air
(see
Chart
B)
X
60 Min.
NOTE:
The
maintenance
interval
for
cell
cleaning
can
be
lengthened
by increasing
the
number
of
air cleaners
beyond
the
required
number.
7
CHART
A
-
AIR CHANGES
PER
HOUR
Load
Description.
of
Application
Air Changes
Light
Generaloffices
&
computer
rooms
4-5
Average
Conference
and
break
rooms
6
Heavy
Designated
smoking
areas,
bingo
halls,
bars,
& elitra
smoky
areas
8-10
CHART
B.
CUBIC
FEET
OF AIR
PER
MINUTE
The air
cleaner
has
a three-speed
fan
motor.
Use
the
C.F.M.
that
corresponds
to the
speed
that
the
air cleaner
will operate
on
normally.
Low
speed
where
noise
is
a
prime
concern
and
high
speed
where noise
is
not
a factor.
Model
C-12
Low
Medium
Hlgh
c.F.M.
800
1 050
1zso
Nolse
Level
57.5
dB(A)
65
dB(A)
69
dB(A)