Engine: Refrigeration AC

1. A To direct evaporator outlet pressure to the lower part of the solenoid bellows.
2. B To transmit the bulb pressure (proportional to the coil temperature) to the thermal expansion valve diaphragm.
3. C To open or close the solenoid valve when the box temperature increases or decreases.
4. D To open the back pressure regulating valve when evaporator coil pressure increases.

Tip: press A-D to answer