Chery A15. Manual — part 146

Moving parts of compressor are lubricated by oil splashed or contained in coolant: cooling oil

will be splashed all around by rotating swashplate when compressor is working. In addition,

the intersolubility between coolant and oil allows coolant to carry some cooling oil when

flowing into compressor to lubricate interior moving parts.

Installation of Compressor

Fix compressor onto bracket with two bolts (M10*110), tightening torque: 45±5N·m.

(II). Condenser

Condenser works to cool and condense the coolant vapor exhausted by compressor to release

the heat and liquefy the coolant.

Installation of Condenser

Fix condenser on water tank with two tapping screws, and fit corresponding bush and washer

on screws, tightening torque: 6±0.6N·m;

Fix condenser bracket on front cross beam with three bolts (M6) and washers, tightening

torque: 1.5±0.15N·m;

Fit the assembled condenser and radiator on corresponding fixing holes;

Fit rubber washers and cushion blocks, and fix condenser on front cross beam with two nuts,

tightening torque: 1.5±0.15N·m.

Chery A15 car uses Serpentine condenser, as the figure shows. Condenser and engine radiator

are fixed side by side, and an axial fan driven by a DC motor is installed behind for forced

cooling purpose of condenser and radiator.

(III). Coolant Tank

Coolant tank is located below condenser (outlet of condenser). The structure is shown in the

figure below:

Coolant tank is a pressure container for coolant, which delivers liquid coolant to expansion

valve at a certain flow rate. Coolant tank strainer filtrates impurities in coolant, and the

bibulous monox desiccant filled in dryer absorbs water content in coolant. Besides, a fusible

plug is installed on coolant tank, which will be fused in case that the temperature and pressure

in cooling system and coolant tank sharply increase to a certain degree due to poor radiation

of condenser or other reasons to drain some high-pressure and high-temperature coolant, so as

to protect cooling system.

(IV). Expansion Valve and Pressure Switch

1). Expansion Valve

The conventional thermo-expansion valve used in Chery A15 car is fixed on inlet/outlet tube

of evaporator, as shown in the figure below.

The temperature sensor in expansion valve adjusts ball valve opening according to coolant

temperature at evaporator outlet to control coolant flow rate.

2). Pressure Switch

Chery A15 uses dual-pressure (high/low pressure) four-wire switch as the air conditioning

pressure switch. The switch is fitted on high pressure pipe in front of expansion valve, closing

pressure for low pressure switch is 50PSI, and 220PSI for high pressure switch.

(V). Evaporator

Chery A15 uses tube-fin type evaporator, which is combined in the air conditioner assembly

under dashboard.

Evaporator has a reverse function with condenser: liquid coolant expanded by expansion

valve absorbs heat in evaporator to be gassified to coolant gas and then reenters compressor

for circulation.

Installation of Evaporator

Assemble the evaporator: fit the four bolts and water inlet and outlet pipes in the

corresponding holes on front boarding;

Fix evaporator with one bolt (M8*25) and four nuts respectively on steering cross beam and

front boarding, tightening torque: 3.5±0.2N·m;

Fix control panel on dashboard with four tapping screws, and then fit decorative plate for

control panel, tightening torque: 1.5±0.2N·m;

Connect the parts connecting evaporator with front compartment.

(VI). Evaporator Temperature Sensor (Thermoregulator)

The evaporator temperature sensor is a temperature-sensitive tube mechanical

thermoregulator, whose working temperature is generally set to be off above 4ºC and on

below 3ºC. The mounting position is right below the evaporator, as the figure shows.

Sensor

Location of Temperature Sensor

(VII) Tightening Torque for Air Conditioning Pipeline Fasteners

Hexagon bolt fixed at compressor (M10): 30N.m;

Hexagon bolt fixed at expansion valve (M6): 7 N.m;

Nut connecting and tightening condenser inlet pipe: 32 N.m;

Nut connecting and tightening condenser outlet pipe:11.9～13 N.m.

Section Twelve: Cooling System Leakage Detection

Three ways to detect coolant leakage in cooling system:

electronic leakage detector, soapy water and halogen detector

lamp.

(I). Electronic Leakage Detector

Connect power plug 2 of electronic leakage detector 1 with

power supply, place the detecting head 3 at a distance of 3mm

away from test point and move it slowly (30mm/s), as the

figure shows. The detector will beep if leakage is detected.

Detecting with electronic leakage detector