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8 . Pu rg e t h e
temp o ra ry re f rig er a n t
c h a r g e o u t t h e l o w s i d e . T h i s w i l l h e l p
t o re m ov e mo istu re fr om th e s yste m .
K e ep i n mi n d th a t th e p ro cess of
f l u s h i n g c l e a n r e f r i g e r a n t t h r o u g h t h e
s ys te m i s e q u iva l en t to 20 o r 2 5 min -
u t es o f p u l l i n g a va cu u m w ith a va c-
u u m p um p o f l o we r ca p a city tha n
t h o s e s p e ci f i e d . T he re fo re , you can
i n d u c e a n o t h e r te mp or ary cha r g e a n d
p u r g e , i f y o u d e s i r e .
9 . R e p e a t th e va cuu m p u mp p ro ce du r e
f o r a n o t h e r 3 0 m i n u t e s w h i c h s h o u l d
a g a i n p u l l d o w n to a b o ut 5 00 micr o n s
o r 2 9 .6 i n ch e s of me rcu ry.
I MP OR TA N T : A l w a ys he a t as much o f th e
s ys t e m as yo u ca n w h il e e vacu a tin g , p re f-
e ra b l y w i t h a h e a t l a mp - n o t a to rch . Be
ca r e fu l w i th t h e l amp , h o we ve r, to a vo id
da m a gi n g a n y n e ar by p l a sti c p a rts or sys-
te m p a rt s .
RECHARGING
l t i s v e ry e sse nti a l th at you ha ve th e
p r o p e r e g u i p m e n t w h e n c h a r g i n g t h e s y s -
t e m s o y o u c a n b e a ccur ate to w ithin 1 /4
ou nc e o f re f r i g e r a nt. Al tho u g h th er e a r e
s e v e ra l m e t h o d s of ch a rg in g , w e r eco m -
m e n d t h e u s e o f a s i g h t g l a s s c h a r g i n g
c y li n de r w h i c h i s a ccu ra te re ga rdle ss o f
t h e a m bi e n t t e m p era tu re .
W e r e c o m m e n d w h e n u s i n g t h e v a c u u m
p u m p e v a cu a t i n g p ro ce du re , th at yo u
c h arg e t h ro u g h th e l o w si d e o f th e s ystem ,
e i t h er th ro u g h t h e p ro ce ss tu b e o r th e
s u c t i o n l i n e . R e m e m b e r , h o w e v e r , t h a t
th e re f ri g e r a n t sho u l d b e i ntr od u ce d
sl ow l y . Be c a u se t he re frig e ra n t w i ll e n te r
t h e s y s t e m i n a l i q u i d s t a t e , y o u s h o u l d
n e v e r r u n t h e c o m p r e s s o r w h i l e c h a r g i n g .
Wait at least 5 m inutes aft er the charge
has enter ed before star ting t he c ompr es -
s o r .
1. C onnect the hose of the charging c y l-
inder t o t he syst em t hrough a gauge
manif old as shown in previous draw -
i n g . C l o s e v a l v e " A " o n t h e m a n i f o l d .
2 . O p e n t h e c h a r g i n g c y l i n d e r a n d p u r g e
the hose. A s soon as the refri gerant
h a s s t a b i l i z e d i n t h e c h a r g i n g c y l i n d e r ,
check the pr essur e r eading of the c yl -
inder and r otat e the sleeve to c orr ect
t he sett ing for pr essur e and t he ty pe
of r efr igerant being used.
3. Consult Section 9 for the am ount of
c h a r g e n e e d e d , t h e n o p e n v a l v e " 8 " .
As you charge t he syst em, you may
n o t i c e s o m e b u b b l e s i n t h e c y l i n d e r .
T h e s e c a n b e e l i m i n a t e d b y c l o s i n g
y o u r s e r v i c e v a l v e a n d t i p p i n g t h e c y l -
i n d e r u p s i d e - d o w n m o m e n t a r i l y . T h e n
c o n t i n u e c h a r g i n g u n t i l t h e c o r r e c t
charge has enter ed t he system.
lf at any time you are r equir ed to rai se the
i n t e r n a l p r e s s u r e o f t h e c h a r g i n g c y l i n d e r ,
o r i f y o u r c h a r g i n g c y l i n d e r d o e s n o t h a v e
a n i n t e r n a l h e a t e r , p l a c e t h e c y l i n d e r i n a
bucket of war m wat er (not over 125o F ).
N e v e r h e a t a c h a r g i n g c y l i n d e r w i t h a
flam e. Such action could cause hy dros-
t a t i c p r e s s u r e t o b u i l d u p t o d a n g e r o u s
l e v e l s a n d p o s s i b l y c a u s e t h e c y l i n d e r t o
r u p t u r e i i k e a b o m b .
4 . W hen you ar e sur e t he system is c or-
rect ly charged, stop the flow of r efr i-
g e r a n t a t v a l v e " B " . T h e n p i n c h o f f t h e
low side pr ocess tube, close the
c h a r g i n g c y l i n d e r v a l v e , r e m o v e t h e
ser vice valve, and solder t he pr ocess
t u b e c l o s e d .
3 - 1 3
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