A typical shipboard domestic multi-box refrigeration system operates with one compressor and condenser. What is the purpose of the sensing line connected to the thermal bulb at the evaporator coil outlet?

Question

Accepted Answer

To transmit the bulb pressure (proportional to the coil temperature) to the thermal expansion valve diaphragm.

Answer

To open or close the solenoid valve when the box temperature increases or decreases.

Answer

To open the back-pressure regulating valve when evaporator coil pressure increases.

Answer

To direct evaporator outlet pressure to the lower part of the solenoid bellows.

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