Manitowoc

HOT GAS VALVEGeneralThe hot gas valve is an electrically operated valve thatopens when energized, and closes when deenergized.Normal OperationThe valve is de-energized (closed) during the freezecycle and energized (open) during the harvest cycle.The valve is positioned between the receiver and theevaporator and performs two functions:1. Prevents refrigerant from entering the evaporatorduring the freeze cycle.The hot gas valve is not used during the freezecycle. The hot gas valve is de-energized (closed)preventing refrigerant flow from the receiver intothe evaporator.2. Allows refrigerant vapor to enter the evaporator inthe harvest cycle.During the harvest cycle, the hot gas valve isenergized (open) allowing refrigerant gas from thedischarge line of the compressor to flow into theevaporator. The heat is absorbed by theevaporator and allows release of the ice slab.Exact pressures vary according to ambienttemperature and ice machine model. Harvestpressures (for Q130/Q170/Q210/Q270 ice machines)can be found in the Cycle Time/24 Hour IceProduction/ Refrigerant Pressure Charts in this book.Part Number 80-01111-9 7/10 121