Chery automobile Service Manual page 525

reservoir.
(2) Tighten the propane reservoir 16 to the
leak detector.
(3) Insert a lighting match into lighting device
9, and then slowly turn the adjusting
handle 14 in
direction till the torch is lit.
(4) Adjust the flame to smallest. The smaller
the flame, the more sensitive to the leak of
refrigerant.
(5)Move suck pipe 3 to the possible leak
position.
(6) Observe the change of flame color. The
flame has no color if there is no leakage.
The flame is tint green if there is very
small leakage or be blue if there is
relatively big leakage, and it will become
purple if there is too much leakage.
5. Methods of Refrigerant Oil Charging
There are two methods for refrigerant oil
charging: direct charging method and vacuum
inhaling method.
1 Direct charging
Remove the oil charging plug 1, and charge
the specified model of refrigerant oil.
2 Vacuum inhaling
Vacuumize the refrigeration system to 30psi,
and then start to charge the refrigerant oil, the
procedures of which are as follows:
(1) Turn off the high-pressure manual valve,
and turn off the auxiliary valve.
(2) Remove the high-pressure side hose from
the manifold pressure gauge, and insert
the hose into the oil cup.
(3) Turn off the auxiliary valve to inhale the
refrigerant oil into the refrigeration system
from the oil cup.
(4) When the refrigeration oils in the cup are
nearly evacuated, immediately turn off the
the counterclockwise
U-10
Low-pressure gauge
Low-pressure manual valve
Vacuum pump
High-pressure side hose
Vacuumizing and Charging the Refrigeration Oil
High-pressure gauge
High-pressure manual valve
Low-pressure side hose
Air return
Air exhaust
auxiliary valve
High-pressure pipe
Oil cup