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R R e e f f r r i i g g e e r r a a t t i i o o n n S S y y s s t t e e m m
WARNING
R R - - 1 1 3 3 4 4 A A S S Y Y S S T T E E M M S S A A R R E E P P A A R R T T I I C C U U L L A A R R L L Y Y
S S U U S S C C E E P P T T I I B B L L E E T T O O M M O O I I S S T T U U R R E E C C O O N N T T A A M M I I N N A A - -
T T I I O O N N W W H H I I C C H H C C A A N N O O N N L L Y Y B B E E P P R R E E V V E E N N T T E E D D B B Y Y
E E V V A A C C U U A A T T I I N N G G T T H H E E S S Y Y S S T T E E M M F F O O R R A A M M I I N N I I M M U U M M
O O F F 3 3 0 0 M M I I N N U U T T E E S S T T O O A A T T T T A A I I N N A A M M I I N N I I M M U U M M 2 2 9 9 . . 9 9
I I N N C C H H ( ( 5 5 0 0 0 0 M M I I C C R R O O N N O O R R L L O O W W E E R R ) ) V V A A C C U U U U M M . .
E E v v a a c c u u a a t t i i n n g g S S y y s s t t e e m m
To achieve the required levels of evacuation, a
properly maintained two stage vacuum pump in
good condition is required. It is absolutely
essential to maintain your vacuum pump according
to the manufacturer's instructions including
required oil changes at the recommended
intervals. Vacuum pump oil should always be
changed after evacuating a contaminated system.
Vacuum pump performance should be checked
periodically with a micron gauge.
1. Make certain that charging cylinder valve, hand
shut-off valve, and manifold gauge valves are
closed.
2. Start vacuum pump.
3. Open hand shut-off valve and slowly open
both manifold valves, turning counterclock-
wise, for two full rotations.
CAUTION
I I f f h h i i g g h h v v a a c c u u u u m m e e q q u u i i p p m m e e n n t t i i s s u u s s e e d d , , j j u u s s t t c c r r a a c c k k
b b o o t t h h m m a a n n i i f f o o l l d d v v a a l l v v e e s s f f o o r r a a f f e e w w m m i i n n u u t t e e s s a a n n d d t t h h e e n n
o o p p e e n n s s l l o o w w l l y y f f o o r r t t h h e e t t w w o o f f u u l l l l t t u u r r n n s s c c o o u u n n t t e e r r c c l l o o c c k k - -
w w i i s s e e . . T T h h i i s s w w i i l l l l p p r r e e v v e e n n t t t t h h e e c c o o m m p p r r e e s s s s o o r r o o i i l l f f r r o o m m
f f o o a a m m i i n n g g a a n n d d b b e e i i n n g g d d r r a a w w n n i i n n t t o o t t h h e e v v a a c c u u u u m m
p p u u m m p p . .
4. Operate vacuum pump for a minimum of 30
minutes to a minimum of 29.9" (500 micron)
vacuum.
5. Close hand shut-off valve to vacuum pump.
Watch compound gauge for several minutes.
If reading rises, there is a leak in the system,
go to step 6. If no leak is indicated, stop
vacuum pump. System is now ready for
charging.
6. If a leak is indicated, stop vacuum pump and
introduce a small charge of refrigerant into
system by cracking valve on bottom of
charging cylinder until system is pressurized to
40 or 50 lbs psig.
7. Leak test low-side. Close compound gauge.
Run compressor for a few minutes and leak
test high-side. When leak is found, recapture
refrigerant using EPA approved recovery
system Repair and go back to step 1.
C C h h a a r r g g i i n n g g T T h h e e S S y y s s t t e e m m
CAUTION
C C h h e e c c k k t t h h e e s s e e r r i i a a l l p p l l a a t t e e f f o o r r t t h h e e c c o o r r r r e e c c t t r r e e f f r r i i g g e e r r a a n n t t
t t y y p p e e . . I I t t i i s s e e x x t t r r e e m m e e l l y y i i m m p p o o r r t t a a n n t t t t o o v v e e r r i i f f y y t t h h e e t t y y p p e e
o o f f r r e e f f r r i i g g e e r r a a n n t t i i n n t t h h e e s s y y s s t t e e m m b b e e f f o o r r e e s s t t a a r r t t i i n n g g a a n n y y
s s e e a a l l e e d d s s y y s s t t e e m m r r e e p p a a i i r r s s . . A A f f t t e e r r c c h h a a r r g g i i n n g g t t h h e e
s s y y s s t t e e m m w w i i t t h h l l i i q q u u i i d d b b e e c c e e r r t t a a i i n n t t o o w w a a i i t t a a t t l l e e a a s s t t 5 5
m m i i n n u u t t e e s s b b e e f f o o r r e e s s t t a a r r t t i i n n g g t t h h e e c c o o m m p p r r e e s s s s o o r r t t o o g g i i v v e e
t t h h e e r r e e f f r r i i g g e e r r a a n n t t a a c c h h a a n n c c e e t t o o d d i i s s p p e e r r s s e e t t h h r r o o u u g g h h o o u u t t
t t h h e e s s y y s s t t e e m m . . O O t t h h e e r r w w i i s s e e t t h h e e c c o o m m p p r r e e s s s s o o r r c c o o u u l l d d b b e e
d d a a m m a a g g e e d d b b y y a a t t t t e e m m p p t t i i n n g g t t o o p p u u m m p p e e x x c c e e s s s s i i v v e e
q q u u a a n n t t i i t t i i e e s s o o f f l l i i q q u u i i d d . .
P P r r e e p p a a r r i i n n g g T T h h e e C C h h a a r r g g i i n n g g C C y y l l i i n n d d e e r r : :
1. Make certain that hand shut-off valve to
vacuum pump is closed.
2. Close high-side manifold gauge valve.
3. Set charging cylinder scale to pressure
indicated on cylinder pressure gauge.
4. Observe refrigerant level in sight glass.
Subtract amount to be charged into system
and note shut off point.
5. Open charging cylinder valve slowly and allow
proper charge to enter system.
6. As soon as refrigerant in sight glass has gone
down to predetermined level, close charging
cylinder valve.
WARNING
D D I I S S C C O O N N N N E E C C T T T T H H E E C C H H A A R R G G I I N N G G C C Y Y L L I I N N D D E E R R
H H E E A A T T E E R R A A T T T T H H I I S S T T I I M M E E T T O O P P R R E E V V E E N N T T T T H H E E
C C Y Y L L I I N N D D E E R R P P R R E E S S S S U U R R E E F F R R O O M M E E X X C C E E E E D D I I N N G G I I T T S S
M M A A X X I I M M U U M M L L I I M M I I T T S S . .
7. Allow system to sit for five minutes.
8. Turn on refrigerator compressor. Run
compressor for a few minutes and monitor
system pressures.
9. When satisfied that the unit is operating
correctly, clamp the high-side process tube
with the pinch-off tool while the unit is still
running.
4-10
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