GMC 1982 Light Duty Truck Service Manual page 72

U SING J-5420
A D A P T E R
A C C U M U L A T O R
M U L T I - C A N D IS P E N S IN G U NIT
U SIN G J6271-01 S IN G L E C A N
Q R
Fig. 1 B-24--Charging the CCOT A /C System with Disposable Can or Refrigerant Drum.
vacuum pum p capability. If the vacuum system is unable to
reach 71 1.2-736.6m m ( 2 8 " - 2 9 " ) or m ore vacuum , the
system should be checked for leaks. If no leaks are found,
the vacuum pum p may require repair.
J -2 3 5 0 0 -0 1 C H A R G IN G STA TIO N M E TH O D
Follow C h arg in g in stru ctio n s provided w ith the
J-23500-01 C h arg in g S ta tio n in use w ith the following
exceptions:
1. Do not connect th e high pressu re line to the air
conditioning system.
2. Keep the high pressure valve on the charging station
closed at all times.
3. P erform th e en tire ev acu ate and charge procedure
th ro u g h the a c c u m u la to r low-side pressure service
fitting.
OPEN D U R IN G
E V A C U A T IO N
A N D C H A R G IN G
V A L V E
C A U TIO N : M ake sure o u tle t valve on opener is closed
(clockw ise) befo re installing opener to R -1 2 co ntainer.
14 OZ. C A N S
C L O S E D D U R I N G /
E V A C U A T IO N
OPEN A N D I N V E R T E D
D U R IN G C H A R G IN G
J6272-02 M U L T I CAN
O P E N E R - V A L V E
J5725-04
M A N I F O L D
G A U G E SET TH(S H1GH P R E S S U R E V A L V E IS
/ OPEN A N D V A C U U M PUMP LINE
/ D IS C O N N E C T E D O N L Y D U R IN G
/ E V A C U A T IO N
T H IS H IG H P R E S S U R E
V A L V E IS C L O S E D A N D
L INE D IS C O N N E C T E D
HIGH
D U R IN G D IS C H A R G IN G
S ID E A N D C H A R G IN G
V A L V E
V A C U U M PUMP
U SING J23390
O P E N E R - V A L V E
FOR 12 LB. CAN
/
4. Following these procedures will prevent accidental
high-side vehicles system pressure being subjected to
the C harging Station in the event an error is made in
valve sequence during compressor operation to pull in
the R efrigerant-12 charge.
DISPOSABLE C A N OR REFRIGERANT DR UM
M E TH O D
• If the R efrig eran t-12 drum is used, place it on a scale
and note the total weight before Charging. W atch the
scale during C harging to determ ine the am ount of
R efrig eran t-12 used.
• If disposable 420 ml (14 oz.) R efrig eran t-12 cans are
used, close the tapp ing
AIR CONDITIONING IB-29
30 LB. D R U M H AS
OWN O P E N E R - V A L V E
D E C R E A S E OF W EIG H T
ON S C A L E IN D I C A T E S
C H A R G E A D D E D
valve and then a tta c h