Suzuki GRAND VITARA JB416, Service Manual

Page: 385 / 474

Air Conditioning System: 7B-9
c) Purge any air existing in center charging hose.
When using refrigerant container tap valve, use
the following procedure to purge air.
i) Once fully tighten refrigerant container tap
valve and then loosen (open) plate nut
slightly.
ii) Open low pressure valve of manifold gauge
set a little.
iii) As soon as refrigerant comes out with a
“hiss” (1) through a clearance between
refrigerant container and tap valve, tighten
plate nut as well as manifold gauge set low
pressure valve.
iv) Turn handle of tap valve clockwise so that its
needle is screwed into the new container to
make a hole for refrigerant flow.
8) After the system has been charged with specified
amount (570
±
30 g) of refrigerant or when low
pressure gauge and high pressure gauge have
indicated the following specified value, close low
pressure side valve on manifold gauge set.
Removal of Manifold Gauge Set
WARNING
!
High pressure side is under high pressure.
Therefore, be careful not to get injured
especially on your eyes and skin.
For the A/C system charged with the specified amount of
refrigerant, remove manifold gauge set as follows:
1) Close low pressure side valve of manifold gauge set.
(The high pressure side valve is closed continuously
during the process of charging.)
2) Close refrigerant container valve.
3) Stop engine.
4) Using shop rag, remove charging hoses from service
valves. This operation must be performed quickly.
5) Put caps on service valves.
Check A/C System for Refrigerant Leaks
Whenever a refrigerant leak is suspected in the system
or any service operation has been performed which may
result in malfunction lines and/or connections, it is
advisable to check for leaks.
Common sense should be used in performing any
refrigerant leak test, since the need and extent of any
such test will, in general, depend upon the nature of a
complaint and the type of a service performed on the
system.
Liquid leak detector
WARNING
!
• To prevent explosions or fires, make sure
that there are no flammables in the vicinity.
• When exposed to fire, the refrigerant turns
into a poisonous gas (phosgene). Do not
inhale this gas.
Low side and high side pressure example
Gauges should read as follows when ambient
temperature is 30
°
C (86
°
F)
Pressure
on high pressure gauge M16 engine model:
1150 – 1410 kPa
11.5 – 14.1 kg/cm
2
164 – 201 psi
J20 engine model:
1300 – 1630 kPa
13.0 – 16.3 kg/cm
2
185 – 232 psi
Pressure
on low pressure gauge M16 engine model:
280 – 410 kPa
2.8 – 4.1 kg/cm
2
40 – 58 psi
J20 engine model:
250 – 370 kPa
2.5 – 3.7 kg/cm
2
36 – 53 psi
IYSQ01720016-01