Chery A series. Manual — part 131

1. Precautions for Refrigerant Concerned

(1) To avoid the refrigerant contacting with

your skin, wear rubber gloves and safety
goggles while handling the refrigerant.

(2) Handle the refrigerant concerned at a well

ventilated location. Since the refrigerant is
a colorless gas at room temperature and its
density is greater than that of air, the
refrigerant will deposit in the maintenance
location, which may easily cause the
maintenance personnel choked.

(3) Do not allow the refrigerant to contact with

fire. Otherwise it may generate the toxic
gas.

(4) The O-ring can be applied once only.

(5)

Chery model-A15LHD adopts the
refrigerant R134a which cannot be
interchanged with R12. Also compressor
oils cannot be mixed. During the course of
handling, any tool that has touched certain
kind of refrigerant must not touch any other
kind of refrigerant.

Refrigerant Tank Unlock Valve

1-Butterfly Handle

2-Refrigerant Tank Refilling Valve

3-Plate-shaped Nut

4- Needle Valve

5-Refilling Valve Joint

2

. Method to Refill Refrigerant

If the 400g tanked refrigerant is required, a
refrigerant tank unlock valve shall be applied
(shown in the figure). The operation
procedures are as follows:

(1) Before the unlock valve is installed on the

refrigerant tank, turn the butterfly handle 1
in the counterclockwise direction till the
needle valve returns back completely.

(2)

Turn the plate-shaped nut 3 in the
counterclockwise direction to lift it up to
the highest position, and then tighten the
valve and the dummy club at the center of
refrigerant tank.

(3) Install the intermediate filling hose of

manifold pressure gauge on the joint 5, and
then turn the plate-shaped nut in the

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clockwise direction and tighten it by hand
as possible.

(4)

Turn the butterfly handle 1 in the
clockwise direction to make the valve
needle 4 in its front end punch a small hole
in the dummy club of refrigerant tank.

(5)

Turn the butterfly handle 1 in the
counterclockwise direction, which the
refrigerant will flow into the manifold
pressure gauge along the charging hose.

(6) Then turn the butterfly handle 1 in the

clockwise direction to the lowest position,
and it can close down the refrigerant tank
again. However, do not detach the unlock
valve, otherwise the refrigerant inside the
tank will leak out.

3. Refrigerant Refilling Procedures

(1) Connect the manifold pressure gauge to

the refrigerant tank, shown in the picture
below.

(2) Unscrew the handle of unlock valve 2 in

the counterclockwise direction to enable
the refrigerant to enter the intermediate
charging hose. In this case, do not open the
handle valves in the both sides.

(3) Unscrew the nuts of intermediate hose of

manifold pressure gauge, and then tighten
the nuts of intermediate hose after the air
inside the intermediate hose are drained
when you see the white refrigerant gas
overflow and heard the “fizzle” sound.

(4) Turn on the high-pressure manual valve 4,

shown in the figure below, stand the
refrigerant tank 1 upside down so as to let
the refrigerant in liquid-state charge into
the refrigeration system. In this case, do
not switch on the A/C unit to prevent the
refrigerant from returning back to the tank.

HIGH-PRESSURE

SEVICE VALVE

REFRIGERATION DEVICE

RECYCLING

RECEIVER

LOW-PRESSURE

SEVICE VALVE

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200 g or more refrigerants shall be charged
every time, and turn the compressor
several times by hand after the completion
of charging.

(5) Turn off the high-pressure manual valve 4,

shown in the figure below, and turn on the
low-pressure manual valve 3 to let the
refrigerant in gas-state charge into the
refrigeration system. The refrigerant
charged from the low-pressure manual
valve must be gas-state. If it is liquid state,
the liquid hammer phenomenon may
appear to damage the compressor. Turn off
the low-pressure manual valve when the
reading of low-pressure gauge reaches
2.8X10

5

Pa.

Refrigerant Refilling
Regulated amount:R134a，850±25g

4. Leak Check of Refrigeration System

Three effective methods can be used to check
the air tightness of refrigeration system: check
with electronic leak detector, soap solution and
halogen leak detector.

1) Check with Electronic Leak Detector

As shown in the figure, connect the power
supply connector 2 of electronic leak detector
1 to the power supply, and move probe 3
slowly (30 mm/s), which should be placed 3
mm away from the check point. And if any
alarming sound is emitted, it means there is a
leak phenomenon occurred at that place.

2）Check with Soap Solution

Apply the soap solution to the possible leak
position. Observe whether air bubbles appear.
If there are air bubbles, it indicates a leaking
accident occurs.

3）Check with Halogen Leak Detector

The inspection procedure is described below:

(1) Check the liquid propane capacity in the

1. Electronic leak detector.

2. Power supply connector.

3. Probe

If the leakage occurs at the joints

of refrigeration pipes, the relevant

O-rings shall be replaced.

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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 the counterclockwise
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

Vacuumizing and Charging the Refrigeration Oil

Oil cup

High-pressure pipe

High-pressure manual valve

Low-pressure side hose

Air return

Air exhaust

auxiliary valve

High-pressure side hose

Low-pressure manual valve

High-pressure gauge

Low-pressure gauge

Vacuum pump

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