Charging A/C System - Chrysler 1998 Viper RT/10 Owner's Manual

24 - 16 HEATING AND AIR CONDITIONING
SERVICE PROCEDURES {Continued)
Fig. 9 Manifold Gauge Set- Typical
R-134a refrigerant requires a special type of com-
pressor oil. When adding oil, make sure to use the oil
t h a t is specified on the under hood label.
Due to the different characteristics of R-134a i t
requires all new service procedures.
The use of R-134a w i l l have a positive environmen-
t a l impact due to it's zero ozone depletion and low
global w a r m i n g impact.
CHARGING A/C SYSTEM
PARTIAL
CHARGE
I f i t was not necessary to completely empty the
refrigerant system, a p a r t i a l refrigerant charge can
be added to the system.
C A U T I O N : R e v i e w all S a f e t y P r e c a u t i o n s a n d W a r n -
i n g s in t h e G e n e r a l Information S e c t i o n before a d d -
ing refrigerant to t h e s y s t e m . Do not a d d refrigerant
to a s y s t e m that i s k n o w n to h a v e a leak.
N O T E : W h e n c o n n e c t i n g the s e r v i c e e q u i p m e n t
c o u p l i n g to t h e line fitting, verify that the v a l v e of
the c o u p l i n g i s fully c l o s e d . T h i s will r e d u c e the
a m o u n t of effort r e q u i r e d to m a k e the c o n n e c t i o n . If
c o n n e c t i o n i s still difficult to m a k e refer to T S B #24-
02-93.
(1) Attach manifold gauge set.
(2) Set the air conditioning controls to A/C and
Low blower speed.
(3) Start the engine and allow i t to w a r m up to
normal r u n n i n g temperature.
SR
(4) I f the air conditioning compressor does not
engage, disconnect the D u a l Pressure Cut Off switch.
Place a j u m p e r wire across the terminals i n the con-
nector boot. I f the compressor s t i l l does not engage, a
problem exists i n the compressor clutch feed circuit.
(5) Hold the engine speed at 1400 r p m .
(6) While following the instructions provided w i t h
the charging equipment being used, charge through
the suction side of the system. A d d enough refriger-
ant to clear the sight glass i n the filter drier.
(7) A t the point when the sight glass clears, note
the weight of the refrigerant supply d r u m or the
level i n the charging cylinder. A d d an additional 227
g (8 oz) of refrigerant to the system. Remove the
j u m p e r wire from the cut off switch connector and
connect the cut off switch.
(8) Test the overall performance of the air condi-
tioner. Close all valves on the charging equipment
and disconnect the hoses from the service ports.
I n s t a l l the service port caps.
EVACUATION
Before adding refrigerant, a l l air must be evacu-
ated from the system. Refer to Evacuating Refriger-
ant system.
CHARGING A/C SYSTEM
The procedure below should be used to f i l l the
refrigerant charge i n the air conditioning system.
W A R N I N G : R E V I E W S A F E T Y P R E C A U T I O N S A N D
W A R N I N G S IN T H I S G R O U P B E F O R E C H A R G I N G
T H E R E F R I G E R A N T S Y S T E M .
A V O I D B R E A T H I N G A / C R E F R I G E R A N T A N D
L U B R I C A N T V A P O R O R MIST. E X P O S U R E M A Y
I R R I T A T E E Y E S , N O S E A N D T H R O A T . U S E O N L Y
A P P R O V E D S E R V I C E E Q U I P M E N T M E E T I N G S A E
R E Q U I R E M E N T S T O D I S C H A R G E R~134a S Y S T E M .
IF A C C I D E N T A L S Y S T E M D I S C H A R G E O C C U R S ,
V E N T I L A T E W O R K A R E A B E F O R E R E S U M I N G S E R -
V I C E .
R - 1 3 4 a S E R V I C E E Q U I P M E N T O R V E H I C L E A / C
S Y S T E M S H O U L D N O T B E P R E S S U R E T E S T E D O R
L E A K T E S T E D W I T H C O M P R E S S E D A I R . M I X T U R E
O F A I R a n d R-134a C A N B E C O M B U S T I B L E A T E L E -
V A T E D P R E S S U R E S . T H E S E M I X T U R E S A R E
P O T E N T I A L L Y D A N G E R O U S A N D M A Y R E S U L T IN
F I R E O R E X P L O S I O N C A U S I N G I N J U R Y O R P R O P -
E R T Y D A M A G E .
C A U T I O N : Do not o v e r c h a r g e refrigerant s y s t e m ,
a s e x c e s s i v e c o m p r e s s o r h e a d p r e s s u r e c a n c a u s e
n o i s e a n d s y s t e m failure.