suction stop

The bleed solenoid valve is typically three to four sizes smaller than the main suction stop valve but not less than 0.5 in.

(65 mm), (2) to prevent what would be a very rapid depressurization of the coil when the suction stop valve opens.

At the conclusion of the bleed period, the suction stop pilot solenoid is de-energized allowing the main valve to open.

This is true under normal circumstances; however, the rapid opening of the suction stop valve will occur if the coil is in the hot-gas dwell period and a power outage occurs causing all solenoids to go to their normal positions.

Once the coil is depressurized and the suction stop valve open, the unit is ready to return to refrigeration mode.