Final answer:
A reciprocating compressor should not be energized when the discharge service valve is closed. It is important to have the suction service valve open when starting the compressor.
Step-by-step explanation:
A reciprocating compressor should not be energized when the discharge service valve is closed. This is because if the discharge service valve is closed, there is no outlet for the compressed gas to flow out, which can lead to damage to the compressor and potentially cause a dangerous build-up of pressure.
It is important to have the suction service valve open when starting the compressor to allow for the intake of gas and to provide adequate cooling to the compressor.