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ICE MACHINES Q-Model Service Manual

ICE MACHINES Q-Model Service Manual

ICE MACHINES Q-Model Service Manual

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Section 7Refrigeration SystemEVAPORATORHEATEXCHANGEREXPANSION VALVECOMPRESSORSTRAINERXHARVEST SOLENOID VALVEXLIQUIDLINESOLENOIDVALVEDRIERRECEIVERSERV<strong>ICE</strong>VALVEHARVEST PRESSUREREGULATING VALVEXH.P.R. SOLENOIDVALVECHECK VALVEHEADPRESSURECONTROLVALVERBREMOTECONDENSERCHECK VALVECRECEIVERLIQUID/VAPOR EQUALIZED TO AMBIENT CONDITIONSSV1568Figure 7-5. Remote Automatic Shut-Off (<strong>Model</strong>s Q450/Q600/Q800/Q1000)Automatic Shut-OffThe compressor and liquid line solenoid valve are deenergizedsimultaneously when the contactor contactsopen.During the off cycle, the check valve prevents refrigerantfrom migrating back into the high side, and the liquid linesolenoid prevents refrigerant from migrating back intothe low side. This protects the compressor fromrefrigerant migration during the off cycle, preventingrefrigerant slugging upon start-up.Part No. 80-1100-3 7-5

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