VSQ/TT • TT-011-0808 • Status: 08.2008For internal use only

Service Training

Worksheet 1.1 – Refrigerant circuit with restrictor (solution)Correct procedures for working on air conditioning systems

1. Label the numbered components.

2. Use arrows to mark the flow of direction of the refrigerant.

3. What status (solid, liquid or gaseous) does the refrigerant have a points A and B in normal A/C operation?

4. Change the pressure and temperature to the values indicated.

Use the familiar sources of information to solve the task ….

1. A/C compressor

2. Drain container with dryer

3. Extraction and charger valve

4. Low pressure switch

5. Evaporator

6. Restrictor

7. High pressure switch

8. Condenser15.7 bar and 60 °C

1.4 bar and –5 °CA mainly gaseous

B liquid

1

2

3

4 5

6

7

8

A

B

VSQ/TT • TT-011-0808 • Status: 08.2008For internal use only

Service Training

Worksheet 1.2 – Refrigerant circuit with expansion valve (solution)Correct procedures for working on air conditioning systems

1. Label the numbered components.

2. Use arrows to mark the flow of direction of the refrigerant.

3. What status (solid, liquid or gaseous) does the refrigerant have a points A and B during normal A/C operation?

4. Change the pressure and temperature to the values indicated.

Use the familiar sources of information to solve the task ….

1. A/C compressor

2. Fluid reservoir with dryer

3. Condenser

4. Expansion valve

5. Evaporator

6. Pressure dump valve

7. Oil drain plug

8. Extraction and charger valve

A gaseous

B generally liquid

20.0 bar and 70 °C

2.49 bar and 5 °C

23

4

5A

B

6

7

1

8

VSQ/TT • TT-011-0808 • Status: 08.2008For internal use only

Service Training

Worksheet 1.3 – Refrigerant circuit with second evaporator (solution)Correct procedures for working on air conditioning systems

1. Label the numbered components.

2. Use arrows to mark the flow of direction of the refrigerant.

3. What status (solid, liquid or gaseous) does the refrigerant have a points A and B during normal A/C operation?

4. Change the pressure and temperature to the values indicated.

Use the familiar sources of information to solve the task ….

1. A/C compressor

2. Refrigerant temperature sender G454

3. Drain and charger valve

4. Expansion valve II

5. Evaporator in rear

6. Evaporator temperature sensor 308

7. High pressure sender G65

8. Condenser

9. Expansion valve I

10. Fluid reservoir with dryer

11. Evaporator

A gaseous

B liquid

1 2

3

4

5

6

7

8

A

B

9

10

11

4.7 bar and 20 °C

4.7 bar and 20 °C