Table
3.2
Permissible
Levels
of
Corrosive
Gases
Gas
Name
Permissible
Level
Hydrogen
sulfide
(H
2
S)
7.1
ppb
or
less
Sulfur
dioxide
(SO
2
)
37
ppb
or
less
Hydrogen
chloride
(HCI)
6.6
ppb
or
less
Chlorine
(CI
2
)
3.4
ppb
or
less
Hydrogen
fluoride
(HF)
3.6
ppb
or
less
Nitrogen
dioxide
(NO
2
)
52
ppb
or
less
Ammonia
(NH
3
)
420
ppb
or
less
Ozone
(O
3
)
5
ppb
or
less
Oil
vapor
0.2
mg/m
3
or
less
3.3
Installation
Environment
This
section
describes
the
installation
environment
of
the
FX700
main
unit.
3.3.1
Dust
■
Airborne
Particles
Ensure
that
airborne
particles
in
the
computer
room
do
not
exceed
0.15
mg/m
3
.
Most
computers
are
designed
to
withstand
this
level
of
airborne
particles.
This
is
the
same
as
the
permissible
level
for
airborne
particles
in
a
general
office
and
should
be
easily
attainable
in
a
computer
room
where
there
is
little
inflow
of
outside
air
containing
airborne
particles
of
dust
and
tobacco
smoke.
■
Eliminating
Dust
Capture
airborne
particles
of
dust,
etc.
with
the
air
filters
in
air
conditioners.
The
computer
room
must
be
regularly
cleaned
to
eliminate
dust
on
top
of
and
underneath
the
floor.
Be
sure
to
clean
the
room
in
the
following
cases:
-
After
building
the
computer
room
and
before
installing
equipment
-
When
the
computer
room
has
been
renovated
-
When
the
location
of
the
device
has
changed,
such
with
the
replacement
of
computers
3.3.2
Corrosive
Gas
Corrosive
gases
and
salty
air
may
corrode
equipment,
which
can
lead
to
malfunctions
and
damage,
dramatically
shortening
the
service
life
of
the
equipment.
Therefore,
they
must
be
eliminated
through
the
installation
of
appropriate
air
cleaning
equipment.
Furthermore,
pressurizing
the
room
with
fresh,
clean
air
prevents
corrosive
gases
outside
from
entering.
Chemical
factory
areas,
hot
springs,
volcanic
areas,
etc.
may
be
sources
of
corrosive
gas.
Chapter
3
Starting
Up
C120-0089-03EN
3.3
Installation
Environment
24
Summary of Contents for PRIMEHPC FX1000
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