Mazda CT-L1005, Training Manual

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Basic Climate Control A/C System
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This warmer refrigerant will transmit its heat through the heat-conducting element on to
the refrigerant in turn causing the reference pressure to increase. This pressure will push
on the ball valve, making the opening larger, and allowing more refrigerant to travel to
the evaporator. Now there is more refrigerant in the evaporator to absorb heat, and the
refrigerant temperature will decrease. Then the process continues.
Expansion Valve
L1005_011
1 Diaphragm 8 Spring force
2 Reference chamber filled with 9 Ball valve
refrigerant 10 Spring
3 Reference pressure 11 Liquid refrigerant to evaporator
4 Heat-conducting element (low pressure)
5 Rod 12 Gaseous refrigerant from evaporator
6 Gaseous refrigerant to compressor 13 Evaporator discharge pressure
7 Liquid refrigerant from condenser
(high pressure)
Curriculum Training 03-15