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9
INSTA
LLATION
Plahtsl110unted in
vehiclesmdstalso.begrounded
..
Review
the applicable
sections
in
t he
National
Electrical
Code and
local
regulations'
to ,.deter;..
mine
the
steps
to
be takenforgrotindi.n. g:the
set,
. .
" "
',~-
'-
, ' - .'
. .
~'
.
. YENTILA TION(PIiESSUREJC
GOL
ED,P
LA
NT)
.-Hrovidf;,\,,<lcmpleventi-.
.....
.
....
. la:tion"r:I'P:7re
must
beacol1/>t;int
supplyoffr:esh
air
,forcooHngthe
plant .. "
In:.~JJrgeroom,
.
or
outo!
doors,C()olingwiU
be
no.
problem.
Thereshou~d"pe,atleast
two openings,
preferaplyat.opposite
ends
of
theel1cl()s~:re,
to
provide
ampleventHation.'fhe
openings: should be. adj\ll:lta}bJesothat
the
vol~me
of
air
can
pecontrolledfor.cold
weather
operation
..
The
area
of
the
air
inlet snould be
at
least
3-1/2
square
feet. The
area
of
the
air
outlet
should be
at
leasta~.,largeas
that
of
.the
air
inlet .. '
FIG. 2-VENTl1.A'!'ION(PRESSURE-COOLED PLANT)
The
installation
of additional openings
maybe.necessary
under
some
conditions
to
prevent
recirculatioriof
heated
air
•.
If
this
becomes.
nec-
essary
•.
airoutJets
in
the
roof
.orin
the wall
near
the ceiling
win
help.
,The
size
of the
air
inlet
.canbe)nc:re~.sed
or
an additional
air
inlet
in-
stalled
nearby.
If
the
unit
is
tobeoperated
wnereflying
Unt,
chaffor
dust
is
likely
to
be
carr
iEidto
thetntake
air:sireal1l'
airJnlet
and outlet openings should
be mad
ewithref
erencetoJ.heprevaHing'
'Wind
...
In.
such
installations
the.
air
inlet
shouldbescreenedan,dthe,
screen
kept cleall
to.
prevent
r"""'.T"II'_
tiortof.airflow.
l?E.RMAN~.NTMOVNTiNG:BASE,
.··.·~.Mo4Pt,the
plantonastibsta,ntia,lly
.
......
.'
.'.
....•.
'..
'.'
,JevelQg~Gr~teo:rtinlberoi
stt,uc-
tural
steel.
base>pref~r~plyat,~e~stl?
,.~nc4~f3high.
··.Locat,e.the.
b~s~
asJo.· px:ovipe.
at
Jeast·
24jllcl1e~:spaCf:)'Ollll,nsides.,
for
cony en ieri'ceIn
...
,-,.
,.',',
- .
_."
- i,,:
',',_;
, ._'
-.
_",'
,," .
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