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SsangYong Rexton. Service manual - part 625

SSANGYONG Y200

7B-2 GENERAL HVAC SYSTEM

Compressor

Condenser

Receiver-Dryer

Refrigerant

Model

Type

Displacement

PCD

Cylinder

Oil (Synthetic Oil)

Type

Size

Capacity

Desiccant

Pressure Switch

Type

Refrigerant Capacity

Component

DESCRIPTION AND OPERATION

SPECIFICATIONS

MFC (6-PASS)

620 w x 479 h x 20 t

250 cc

XH-9 (35 g)

DSL : Dual Pressure, GSL: Triple Pressure

R-134a

Single: 850 ± 50 g, Dual: 1200 ± 50 g

Specifications

V 5

Variable Displacement

9.8 - 151 cc/rev

Ø 130

265 ml

V 7

←

9.8 - 179 cc/rev

←

Application

GENERAL HVAC SYSTEM 7B-3

SSANGYONG Y200

REPAIR INSTRUCTIONS

Air Conditioning

Vehicle air conditioning is the cooling (refrigerant),
heating and ventilation of the air in the passenger
compartment. Refrigerant is accomplished by making
practical use of the three laws of nature. These laws of
nature and their practical application are as follows:

•

Heat transfer

•

Latent heat of vaporization

•

Effect of pressure on boiling or condensation

Heat Transfer

The principle of heat transfer are that the heat always
flow from hot to cold, the rate of heat transfer will
increase as the difference in temperature between two
objects increases, and the mass of an object remains
the same regardless of its heat contents.

Latent Heat of Vaporization

Everything in the world is composed of matter and the
matter exists in one of following states;

•

Solid

•

Liquid

•

Vapor

When a liquid boils, it changes to vapor and absorbs
heat without raising the temperature of the resulting
vapor.

When the vapor condenses, it changes back to a liquid
and gives off heat without lowing the temperature of
the resulting liquid.

Effect of Pressure on Boiling or Condensing

When the pressure on the liquid or vapor changes, the
boiling point changes. Increasing the pressure
increases the boiling point, while the boiling point
decreased by decreasing the pressure on the liquid
or vapor.

Another effect of the compression is an increase in
temperature even through heat has not been added.
For example, if you compress the refrigerant R-134a
from 206kPa (30 psi) to 1206kPa (175 psi) the
temperature of vapor will increase from 0 ° C (32 ° F) to
54 ° C (130 ° F) and boiling point increase. Condensing
point also will increase.

Testing the refrigerant system

1. Check the outer surfaces of the radiator and the

condenser cores to be sure that the airflow is not
blocked by dirt leaves or other foreign material.
Check between the condenser and the radiator as
well as all outer surfaces.

2. Check for any restrictions or kinks inthe condenser

core, the hoses and the pipes.

3. Check the operation of the blower fan.

4. Check all the air ducts for leaks or restrictions. Low

airflow rate may indicate a restricted evaporator
core.

5. Check for slippage of the compressor clutch.

6. Check the drive belt tension.

Handling O-Ring

1. Even though O-rings may look identical, it is

extremely important that only recommended service
replacement air conditioning O-rings be used, or
excessive leakage of the refrigerant may occur.

2. Always O-ring and installation area should be kept

clean. Any foreign material and dust may result in
excessive refrigerant leakage.

3. Before installation, verify that both O-ring and

fittings have not been nicked or deformed.
Deformed or nicked parts must be replaced.

4. Failure to use the proper service replacement parts

and procedures may result in excessive refrigerant
leakage.

Handling Refrigerant

1. Always work in a well-ventilated area.

2. If you have difficulty breathing, seek medical

attention immediately. If refrigerant comes in
contact with any part of your body, flush the
exposed area with water. If a rush or pain develops
seek medical attention.

Handling of Refrigerant Lines and Fittings

1. Using too low or too high a torque when tightening

a fitting can result in loose joints or deformed joint
parts.

2. Back up the opposing fitting to prevent the distortion

of the connecting lines or the components. Back
up both the swaged fitting on the flexible hose
connections and the coupling to which it is attached
two wrenches to prevent turning the fitting and
damaging the ground seat.

Maintaining Chemical Stability In the
Refrigeration System

The efficient operation and life of the air conditioning
system is dependent upon the chemical stability of
the refrigeration system.

When foreign materials, such as dirt, air or moisture,
contaminate the refrigeration system, they will change
the stability of the refrigeration and the polyalkalene
glycol (PAG) compressor oil. They will also affect the
pressure-temperature relationship, reduce efficient
operation and can possibly cause interior corrosion and
abnormal wear of moving parts.

SSANGYONG Y200

7B-4 GENERAL HVAC SYSTEM

Observe the following practices to ensure chemical
stability in the system:

1. Wipe away dirt or oil at and near any connection

before opening that connection. This will reduce the
chance of dirt entering the system.

2. Cap, plug or tape both sides of a connection as

soon as possible after opening the connection. This
will prevent the entry of dirt, foreign material and
moisture.

3. Keep all tools clean and dry including the manifold

gauge set and all replacement parts.

4. Use a clean and dry transfer device and container

to add PAG refrigerant oil. This will ensure that the
oil remains as moisture-free as possible.

5. When opening an A/C system, have everything

needed to perform all operations ready. Do not
leave the A/C system open any longer than
necessary.

6. Evacuate and recharge any A/C system that has

been opened.

GENERAL HVAC SYSTEM 7B-5

SSANGYONG Y200

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BASIC A/C SYSTEM FUNCTION

A/C System consists of the following component
basically.

The refrigerant continues to change the phase, liquid

→

gas

→

liquid to maximize the cooling effect.

YAD7B010

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