How to Calculate Superheat and Subcooling for HVAC and Refrigeration Systems...
Superheat is the measured value of the difference between the temperature of vapor and the temperature of that refrigerant at the same pressure. Another way to is the temperature of vapor above it's boiling temperature at given pressure...
Ensuring proper superheat HVAC and refrigeration systems is very important. Correct superheat ensures that the compressor is not being flooded. Flooding occurs when liquid refrigerant makes its way back to the compressor. This can cause lubrication issues and could damage the compressor...
How to Test Start and Run Capacitors for HVAC and Refrigeration Systems...
Begin by testing the resistance of the windings.
Contactors are used in both residential and HVAC units as means of energizing or de-energizing load . Contactors are electrically controlled switches.
This magnetic field is used to pull the contacts closed, applying power to Springs are used to open the contacts when the magnetic field is de-energized..
By the voltage of the system, The coils of contactor are energized. This voltage is 24, 120, 208 230, or 460 volts.
When replacing contactor, it's important to select the correct control voltage to match what is installed...
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