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High side and low side refer to the pressures in the two halves of the system. AC works by compressing refrigerant in the compressor (the beginning of the ‘high side’), cooling in the condensor it, and then expanding it to absorb heat (where it enters the low side).
What is low side and high side for AC unit?
The low side service port is usually located between the AC compressor and evaporator. The low side service port will have a black or blue plastic cap that needs to be removed. The low side service port is the only port to which the AC Avalanche coupler will connect. Never charge through the high side port.
What does high side mean in HVAC?
The high side, or discharge line, will be the line connected to the compressor from the bottom or lower position. It will not be wrapped in insulation and will be warm to the touch. This is where freon exits the compressor as a liquid.
What is high side and low side in refrigeration?
This system is referred to as having two sides: a low pressure or low side, where the refrigerant absorbs heat as it evaporates, and a high pressure or high side, where the refrigerant vapor releases heat as it is condensed back into a liquid.
What is high side and low side?
High Side/Low Side Drive A semiconductor switch placed in the upper circuit with respect to an external load is referred to as high-side drive (power supply side), and when mounted in the lower circuit is called low side drive (ground side).
How can you tell the difference between high side and low side HVAC?
The high pressure side is the discharge side. It runs from the compressor outlet to the meterin device inlet. The low pressure side is the vaccum side. It runs from the metering device outlet to the compressor inlet.
Which AC line is high pressure?
The pressurized refrigerant is carried from the high side of the AC system to the low side by the High Side AC Hose. The high pressure components of the AC system include the AC Compressor, AC Condenser and the AC Receiver Dryer.
What Causes Low Low AC pressure?
Oil-logging is often a major cause of low-side restrictions. There are many ways in which evaporator and suction lines inside tubing can become oil-logged, including: Wrong type or viscosity of oil. Too much oil in the system.
Is liquid line high or low side?
LIQUID LINE – Pipe or hose connecting condenser to expansion valve. LOW SIDE – That portion of system from orifice in expansion valve through evaporator line or lines through compressor service valve to compressor reed valve. Also called suction side.
Which compressor is used in AC?
The reciprocating compressor is the most popular type of AC compressor. A piston compresses the air by moving up and down inside of a cylinder. As the piston moves down, it creates a vacuum effect that sucks in the refrigerant.
What is discharge line in HVAC?
Discharge gas lines (often referred to as hot gas lines) allow refrigerant to flow from the discharge of the compressor to the inlet of the condenser. Over sizing discharge lines increases the initial cost of the project and may result in insufficient refrigerant gas velocity to carry oil back to the compressor.
Which AC line is cold?
The Copper Pipe (Suction Line) should be sweating and cold to the touch during a hot day. If it is not cold, your compressor could be off (bad capacitor/ hard start kit) or low on Refrigerant. Your Breaker is Tripped.
Do you add refrigerant to the high or low side?
For systems under a vacuum, once the desired vacuum level has been reached, the vacuum pump has been isolated from the system, and no leaks exist, always charge liquid refrigerant in the high side of the system until high- and low-side pressures equalize and liquid stops flowing.
What color is high side on AC?
Manufacturers color-code the hoses to distinguish between high pressure and low pressure. Low-side hoses are blue while the high side is red.
Do you recharge AC on high or low?
You’ll recharge your AC through the low-pressure port. You should consult your owner’s manual to be sure, but your vehicle will have a cap over the pressure ports. One cap is labeled “H” (for high pressure) and the other is labeled “L” (for low).
What is meant by high side switch?
High-side load switches are highly integrated power switches used to connect and disconnect a power source from a load. Using a load switch instead of a regular MOSFET offers several features including simplified design, small footprint, and protection features.
What is high side output?
[1] MOAR OUTPUT. What is a high-side/low-side driver in electronics? First, realize that we say “high side”, we generally mean the power supply hot or +Vcc/Vdd side of the load. And when we say “low side”, we generally mean the neutral or ground/common/return side of the load. On the left is a Low Side Driver.
What is high side PWM?
A pulse-width-modulation (PWM) output in the DRV102 high-side power switch is said to conserve power and reduce heat rise for higher reliability. Features include a PWM circuit, internal 24-kHz oscillator, digital input, external delay and duty-cycle adjustment, thermal shutdown, and over- and under-current detection.
