## How do you calculate superheat and subcooling?

Subtract the Liquid line Temperature from the Liquid Saturation Temperature and you get a Subcooling of 15. “Typically” on TXV systems the Superheat will range between 8 to 28 degrees with a target of about 10 to 15 degrees. The Subcool range on TXV systems will range from about 8 to 20.

### What is the formula for calculating superheat?

The total superheat calculation is as follows: Degrees compressor in temperature (50 degrees) minus saturation temperature (23 degrees) equals total superheat (27 degrees). In the above example, the total superheat was calculated to be 27 degrees.

#### What is the easiest way to calculate subcooling?

If we measure the temperature on the liquid line exiting the condenser coil then we know the end temperature after the refrigerant has lowered in temperature. Subtract the lower temperature measured on the liquid line from the saturated temperature and you have subcooling!

**What is normal superheat for 410a?**

10F

Most heating and cooling systems should operate at a superheat of 10F at the evaporator and between 20F to 25F at the compressor. if your HVAC system has a thermostatic expansion valve (TXV), the subcooling should be between 10F and 18F.

**How do you calculate superheat discharge?**

The discharge superheat is calculated the same way as any other superheat/ subcool on a system. By measuring the discharge superheat you can subtract the suction superheat and that then leaves you with a figure of how much superheat the compressor has given through compression and mechanical /electrical inefficiencies.

## Where do you measure subcooling?

After the vapor has turned to liquid, any temperature of the liquid below that saturation condensing temperature is called subcooling. Liquid sub-cooling is normally measured at the liquid line service valve. The manufacturer will usually specify the required sub-cooling on the outdoor unit service panel.

### How do you do subcooling?

The Liquid Line Temperature is also measured at the outlet of the condensing unit but now is measured on the small liquid line (B). For this example the Liquid line Temp is 95 degrees. Subtract the Liquid line Temperature from the Liquid Saturation Temperature and you get a Subcooling of 15.

#### What is subcooling formula?

Refrigerant liquid is considered subcooled when its temperature is lower than the saturation temperature corresponding to its pressure. The degree of subcooling equals the degrees of temperature decrease below the saturation temperature at the existing pressure. Subcooling Formula = Sat. Liquid Temp.

**How do I calculate freezer superheat?**

Subtract the two numbers to get superheat. For example, 68 psi suction pressure on a R-22 system converts to 40°F. Let’s say the suction line temperature is 50°F. Subtracting the two numbers gives us 10°F of superheat.