Geely EC718, EC718RV, EC715, EC715RV. Manual part — 333

8.2 Automatic Air-conditioning

8.2.1 Specifications
8.2.1.1 Fastener Tightening Specifications

Applications

Model

Specifications

Metric (Nm)

US English (lb-ft)

Condenser Cylindrical Side Nut

M8

10-12

7.4-8.9

Air-conditioning Retaining Screw

ST6.3 × 19

5-7

3.7-5.2

Air-conditioning Retaining Nut

M6

5-7

3.7-5.2

Air-conditioning Retaining Bolts

M6 × 20

8-10

5.9-7.4

Air-conditioning Inlet Pipe Nut

M6

5-7

3.7-5.2

Compressor Retaining Bolts

M8 × 1.25 × 80

23-28

17.0-20.7

Compressor Suction Hose Retaining Bolts

M6 × 30

10-12

7.4-8.9

Compressor Discharge Hose Retaining
Bolts

M6 × 30

10-12

7.4-8.9

High-pressure Pipe Fittings

M19

27-29

19.9-21.4

Low Pressure Pipe Fittings

M24

37-39

27.3-28.8

Air-conditioning High-pressure Pipe Bracket
Bolts

M6 × 12

5-7

3.7-5.2

Air-conditioning Control Panel Retaining
Bolts

M5 × 16

5-7

3.7-5.2

Suction Hose Bracket Bolts

M6

5-7

3.7-5.2

Condenser Upper Pipe

M6 × 25

9-11

6.7-8.1

Condenser Lower Pipe

M6 × 25

9-11

6.7-8.1

Expansion Valve Retaining Bolts

M8 × 20

16-20

11.8-14.8

Blower Speed Control Module Retaining
Screws

ST4.8 × 16

2-4

1.5-3.0

8.2.1.2 Cooling System Parameters

Applications

Parameters

Compressor

Displacement (ml/r)

167

Model

CHD115

Electromagnetic Clutch Power Consumption
(W)

45

Blower

Maximum Air Volume (m

3

/ h)

≥480

Air Volume Control

7-speed Automatic

Heating, Ventilation and A/C System

Automatic Air-conditioning

8-3

Applications

Parameters

Electrical Power Consumption (W)

180

Condenser

Dimensions (mm)

16 × 445 × 694

Heat Transfer (W)

≥11,000

Evaporator

Cooling Capacity (W)

≥5,000

H-type Expansion Valve (Cold t)

1.5

System Cooling Capacity (W)

4,500

8.2.1.3 System Capacity

Applications

Specifications

Metric

US English

Refrigerant Lubricant (100 PG)

Refrigerant Sudden Loss

40ml *

1.34 oz *

Compressor Replacement

Note

If lubricating oil released during the refrigerant recovery is not replaced, the compressor will be damaged.

The vehicle compressor is pre-filled with 150 ml ** (5 oz **) refrigerant lubricant (100 PG).

Condenser Replacement

40 ml **

1.34 oz **

Evaporator Replacement

60 ml **

2.0 oz **

Drier Core Replacement

20 ml #

0.67 oz #

Added 100 PG oil amount should be equal to the sum of the old drier core and the prescribed amount.

Any Piping Component (Hose / Pipe or
Pipe Assembly) Replacement

30 ml **

1.0 oz **

Entire System Refrigerant Lubricating Oil
Capacity

150 ml

5.0 oz

R-134a

Refrigerant Filling Amount

600 ± 10 g

1.37 ± 0.04 b

* It may lead to the refrigerant leakage but not refrigerant oil (100 PG) loss. A serious leakage, hose broken, collision or pressure
relief valve open will lead to refrigerant sudden loss. When replacing components that lead to a large amount of refrigerant loss,
add adequate amount of lubricating oil to the components.
** If the loss of refrigerant components lubricant (100 PG) exceeds the prescribed amount, add lubricating oil according to the loss
amount.

8-4

Automatic Air-conditioning

Heating, Ventilation and A/C System

8.2.1.4 Indoor / Outdoor Temperature Sensor
Resistance Properties

Temperature (°C / ºF)

Lower Limit ( kΩ)

Nominal Value ( kΩ)

Upper Limit ( kΩ)

-20/-4

15.73

16.45

17.19

-15/5

12.27

12.77

13.30

-10/14

9.652

10.00

10.35

-5/23

7.626

7.886

8.151

0/32

6.019

6.270

6.520

5/41

4.833

5.024

5.215

10/50

3.908

4.050

4.192

15/59

3.170

3.285

3.399

20/68

2.600

2.680

2.760

25/77

2.134

2.200

2.266

30/86

1.762

1.816

1.870

35/95

1.441

1.507

1.576

40/104

1.198

1.258

1.319

45/113

1.001

1.056

1.110

50/122

0.840

0.890

0.937

55/131

0.708

0.751

0.797

60/140

0.601

0.643

0.680

65/149

0.511

0.546

0.582

70/158

0.437

0.468

0.501

75/167

0.375

0.402

0.432

80/176

0.323

0.348

0.375

85/185

0.279

0.300

0.326

Heating, Ventilation and A/C System

Automatic Air-conditioning

8-5

8.2.2 Description and Operation
8.2.2.1 Description and Operation

1. Overview

Automatic air-conditioning system is designed to provide a
comfortable riding environment to passengers regardless of
the external weather conditions. The system consists of the
following main components:

–

Cooling System

–

Heating System

–

Air Distribution System

–

Mode / Temperature Control System

2. Compressor

Air-conditioning compressor is driven by compressor clutch
pulley, which is driven by the drive belt driven by the engine
crankshaft. When the electromagnetic clutch coil is not
powered, the compressor pulley is free to rotate and does not
drive the compressor shaft. When the clutch coil is powered,
the clutch piece and the hub are pushed to the pulley, magnetic
clutch chip and pulley locks will be integrated to drive the
compressor shaft. The compressor has a unique lubrication
system. Crankcase suction fluid discharge through the mouth
of the ramp plate spinning, this path allows the lubricating
bearing swash plate. Rotation produce the oil separation effect.
some oil removed from the crankcase mouth suction liquid
discharge liquid separated flows back into the crankcase.
Return oil lubricates compressor mechanical parts.

In the following circumstances, the compressor is turned off:

–

The throttle body is fully open.

–

Low idle

–

Ambient Temperature Low

–

Engine Coolant Temperature Too High

–

Refrigerant pressure is higher than 3,140 kPa(455.4 psi) or
less than 196 kPa (28.4 psi).

Note

Do not crash, drop or place the compressor upside down,
if the compressor is impacted or placed upside down.
Rotate the compressor clutch by hand 5-6 times to
recirculate the engine oil in the cylinder. When engine oil
is in the cylinder, the sudden rotation will cause valve
damage and a negative impact on durability.

3. Condenser, Fluid Reservoir Dryer

High temperature and high pressure refrigerant vapor flows out
from the air-conditioning compressor into the condenser. The
condenser is made from aluminum tubes and cooling fins that
can rapidly transfer heat. Through heat transfer, cooling fins
condenses the high temperature and high pressure refrigerant
vapor into liquid with mild temperature and high pressure. The
drier is located in the left side of the condenser, and welded
with condenser into one part. Drier internal structure design
ensures that the mild temperature and high pressure
refrigerant air liquid mixture enter, while the mild temperature
and high pressure liquid refrigerant flows out from the reservoir.

Dryer reservoir has the desiccant that absorbs cooling system
water. The desiccant can not be reused. When leakage occurs
due to the following reasons reservoir drier core can not
repaired, but replace:

–

Piercing

–

Containment Damage

–

Outside air entering into the system for a long time

4. Inside Temperature Sensor, Outside
Temperature Sensor

The following sensors affect the inside air temperature
automatic control:

–

Inside Temperature Sensor

–

Outside Temperature Sensor

These sensors are temperature sensitive thermal elements.
the sensor resistance and temperature has corresponding
inverse relationship. The resistance determines to the air-
conditioning control module signal levels. Air-conditioning
control module uses this information to instruct the following
components.

–

Inside and Outside Circulation Motor

–

Warm and Cold Air Motor

–

Blower Motor Control Module

Hose is used to connect the inside temperature sensor housing
to the suction device. The air-conditioning outlet air flow form
a small vacuum in the suction hose end. This vacuum has the
following functions

–

Let the air flow through the inside temperature sensor

–

Improves the inside temperature sensor sensing accuracy

8-6

Automatic Air-conditioning

Heating, Ventilation and A/C System