The low-pressure side of a refrigeration system consists of all the components that operate at or below evaporating pressure. Two different pressures exist in the cycle - the evaporating or low pressure in the "low side," and the condensing, or high pressure, in the "high side." The evaporator turns the rest of the refrigerant into a gas, and this gas is used by the compressor to start the refrigeration cycle all over again. These systems rely on the process of absorption and heat, instead of an electrically powered mechanical compressor, to move the refrigerant from the low-pressure side to the high-pressure side. Now tight both the low and high-pressure side hose at position C & D respectively as shown in the image. Although the low side pressure should be around 2 psig, at times it can fluctuate from 0 to -3 psig. The part is made up of: suction line flow control; evaporator; Direct Expansion System High Side. If the system is continuing to cool it may be doing so at reduced capacity, observed as a … In the order of the direction of flow, the low pressure side of a refrigeration system is considered to exist between what two components? You can think of the expansion valve as a small hole. All the gas is at room temperature. Low side pressure ; The compressor outlet lines are known as: High side pressure; Discharge pressure; Head pressure; The compressor absorbs vapor refrigerant from the suction line and compresses that heat to high superheat vapor. Low head pressure may occur simulataneously with high pressure on the suction side of an air conditioner, heat pump or refrigeration system compressor system. Start charging the gas refrigerant from the refrigerant bottle to the low-pressure side of the HVAC system at connection C by opening the valve A and the refrigerant valve of the charging bottle until the vacuum comes to zero. These components comprise the low-pressure side of the expansion valve, the evaporator, and all the interconnecting tubing up to and including the low side … The high side is the high pressure part of the refrigeration system. Low Refrigeration Pressure Switches - The low-pressure switch is typically an automatic reset switch that will reset itself when the pressure on the low-pressure side of the refrigeration systems returns to normal or above the setting on the switch. a. expansion valve to the compressor b. receiver to the expansion coil c. expansion valve to the evaporator d. condenser to the expansion valve The cycle starts with the low-pressure (lp) valve closed, the high-pressure (hp) valve open, and the displacer all the way to the right (so in the cold region). Locating the Refrigerator Compressor This basic understanding of how the refrigeration process works on your appliance will allow you to identify the suction side of the compressor. From a to b. If the low side pressure rises to over 10 psig, the system has too much refrigerant. The part is also called low side pressure, suction pressure, vaporizing pressure or simply low pressure. The low pressure side allows refrigerant to boil at a temperature below the temperature of the space being cooled, absorbing heat. 21. On the other side of the hole is a low-pressure area (because the compressor is sucking gas out of that side). On one side of the hole is high-pressure ammonia liquid. The low side is the low pressure part of the refrigeration system. The high-pressure ammonia liquid flows through the expansion valve. The high side pressure allows the refrigerant to condense at a temperature higher than the outdoor temperature, releasing heat. The displacer moves to the left while the cold head is connected to the hp side of the compressor. When the refrigerator's compressor first begins running, the pressure will appear higher than normal. These pressure areas are separated by two dividing points: one is the metering device where the refrigerant flow is controlled, and the other is at the compressor, where vapor is compressed.
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