Circuit Schematic of Water-Cooled Portable Water Chiller to 3 Tons

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Open or Close the descriptions below with the Open All Close All icons.

  • OpenCloseCompressor (1)
  • The Compressor has two functions in the refrigerant cycle.
  • First, it removes the refrigerant vapor from the evaporator and reduces the pressure in the evaporator to a point where the desired evaporating temperature can be maintained.
  • Second, the compressor raises the pressure of the refrigerant vapor to a level high enough so that the temperature is higher than the temperature of the cooling medium available for condensing in the refrigerant vapor.
  • OpenCloseWater-Cooled Condenser (2)
  • The condenser is a heat exchanger where the process heat absorbed by the refrigerant is given off to the air around it.
  • As heat is given off by the high temperature high pressure vapor, its temperature falls until the vapor condenses to a liquid.
  • Water-cooled condenser use a plant water supply source, typically a tower system.
  • OpenCloseRefrigerant Pressure Limit Switch (3)
  • Protects the system against excessive pressure in the refrigerant circuit.
  • For the most typical operations, the high pressure limit is factory set at 325# and the low pressure switch is set to open at 58# and close at 63#.
  • Alteration of this limit switch is not advisable unless Factory directed.
  • OpenCloseHigh Refrigerant Pressure Gauge (4)
  • Provides visual indication of the refrigerant condensing pressure.
  • OpenCloseWater Regulator Valve (5)
  • Automatically adjusts the condenser water flow by the condenser head pressure to establish nominal condenser refrigerant pressure.
  • OpenCloseFilter Drier (6)
  • The filter drier prevents or removes moisture, dirt, and other foreign materials from the refrigerant that will harm the system components and reduce efficiency.
  • OpenCloseLiquid Line Solenoid Optional (7)
  • The liquid line solenoid is an electrically controlled refrigerant flow control valve that closes when the compressor stops.
  • This prevents liquid refrigerant from migrating to the evaporator and causing liquid slugging when the compressor starts again.
  • Liquid slugging can cause severe damage to the compressor. The valve is opened when the compressor is on.
  • OpenCloseRefrigerant Sight Glass (8)
  • The refrigerant sight glass allows the operator or serviceman to observe the flow of liquid refrigerant.
  • Adequate refrigerant is determined by a clear liquid flow.
  • Bubbles indicate a shortage of refrigerant.
  • The moisture indicator turns colors depending on the moisture content in the system. Green signals no moisture content, yellow signals that the system is contaminated with moisture and requires service.
  • OpenCloseExpansion Valve (9)
  • The expansion valve meters the flow of liquid refrigerant into the evaporator at the proper rate to provide cooling of the process water.
  • As more cooling is required, additional refrigerant is metered through the valve into the evaporator.
  • OpenCloseHot Gas Bypass Valve (10)
  • The hot gas bypass valve prevents short cycling of the compressor by modulating the compressor capacity.
  • When activated, the valve opens and allows hot refrigerant gas to enter the refrigerant stream entering the evaporator.
  • This reduces the effective capacity of the system.
  • OpenCloseEvaporator (11)
  • The evaporator is the device in which liquid refrigerant boils off, absorbing heat as it evaporates, cooling the process fluid.
  • OpenCloseReservoir (12)
  • The coolant reservoir provides adequate volume to support the flow requirements of the chiller.
  • The reservoir is non-pressurized promoting air separation and high process flows.
  • OpenCloseCoolant Pump (13)
  • The coolant pump circulates chilled fluid through the process loop.
  • OpenCloseTo Process Sensor Probe (14)
  • The to process sensor probe is placed in the coolant flow stream going to the process.
  • Control decisions are made based on the TO PROCESS coolant temperature.
  • OpenCloseCoolant Pressure Gauge (15)
  • Provides visual indication of the coolant pressure supplied to the process.
  • OpenCloseWater make Up Solenoid Valve Optional (16)
  • When activated by the float switch, the WATER MAKE UP SOLENOID will open and introduce supply water to the reservoir.
  • This restores the reservoir to the proper operating level.
  • OpenCloseFrom Process Sensor Probe (17)
  • The from process sensor probe is placed in the coolant flow stream coming back from the process.
  • OpenCloseReservoir Level float Switch Optional (18)
  • The reservoir float level switch is place at the proper water level in the reservoir.
  • If the water level falls below the proper level, the float switch activates the Water Make-Up Solenoid valve refilling the tank to the proper level.
  • OpenCloseLow Refrigerant Pressure Gauge (19)
  • Provides visual indication of the refrigerant evaporating pressure.

For more information about water-cooled portable water chillers call the Advantage Sales Department at 317-887-0729.

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