Refrigerant R-410A Pressure Temperature Chart

Refrigerant R-410A Pressure Temperature ChartRefrigerant R-410A Pressure Temperature Chart - R410A is an HFC and is commonly used in residential and light commercial HVAC equipment for air conditioners and heat pump systems. It widely replaces HCFC R-22 which was mandated by the Montreal Protocol to be phased out of production and use by 2020. R-410A differs a lot from R-22 in both chemical makeup and the tools needed to measure the pressures of R-410A. Since R-410A operates at higher pressure and a different type of oil is used than R-22 separate gauges should be used to obtain pressures. Cross contamination of the oils can cause serious issues between the two types of systems and it is highly recommended to use separate gauges for service providers. (more…)

How Much Refrigerant for the Air Conditioner

How Much Refrigerant for the Air Conditioner Question: What amount of Freon would it take to service a unit that services a 1200 square foot residential house if it were completely depleted?

How Much Refrigerant for the Air Conditioner

Answer: We get questions like this a lot in our email and this is not easily answered especially when we are talking about charging an air conditioner or heat system. No matter how the system lost its charge of refrigerant (many people refer to it as Freon which is technically incorrect) there are many things you need to know before attempting to charge the air conditioner or heat pump with refrigerant (or Freon is you prefer). (more…)

Replace HVAC Compressor for Air Conditioner Repair

Replace HVAC Compressor for Air Conditioner Repair - Question - Richard - I am an HVAC technician and have read all of your articles on refrigeration and compressors. Great information and it has helped to hone my skills and offer better service for my customers. Thanks! I was wondering what your experience is with replacing compressors. How do you arrive at the decision to replace a compressor technically speaking of course? Do you recommend repairing the air conditioner by replacing the compressor or replacing the central air conditioner? I look forward to reading your answer. Brett Des Moines, WA

Air Conditioner Sequence of Operation | HVAC Cooling

Air Conditioner Sequence of Operation
Air Conditioner Sequence of Operation - When a technician is troubleshooting an air conditioner problem it is important that the technician understands the sequence of operation for that equipment. When there is a problem with the equipment, including air conditioners, the technician will know the problem if the equipment or air conditioner does not follow the sequence of operation. Sometimes it is that easy and other times it is not that easy when troubleshooting any type of HVAC equipment. However, it is important to understand the sequence of operation for an air conditioner so the technician can troubleshoot the air conditioner system. (more…)

Evaporator Coil for Heat Pumps & Air Conditioners | HVAC Refrigeration

Evaporator Coil for Heat Pumps & Air Conditioners

Old Evaporator Coil in a Rooftop Air ConditionerEvaporator Coil for Heat Pumps & Air Conditioners – the evaporator is responsible for absorbing heat into the coils and the refrigerant. The evaporator is an essential component of vapor compression refrigeration. This is usually done as result of passing air or water over the evaporator coil where a heat exchange process takes place. Heat leaves the air or water (whatever medium is used) and is absorbed into the coil and the liquid refrigerant. As more and more heat is absorbed by the evaporator coil and the refrigerant again changes state from a liquid to a refrigerant vapor. By the time the refrigerant leaves the evaporator coil the refrigerant should be all vapor and ready to be received again by the refrigeration compressor. (more…)

Refrigeration Pressure Switches | HVAC Systems

What you will learn from Refrigeration Pressure Switches

  1. A question from one our readers - What are refrigeration pressure switches and how pressure switches protect the refrigeration circuit.
  2. All about high-pressure refrigeration switches
  3. All about low-pressure refrigeration switches
  4. Benefits of refrigeration pressure switches
  5. Lots of related links to help you learn more

Richard - What are pressure switches used for in refrigeration circuits and how do pressure switches protect the system from further damage? (more…)

Compressor Rebuild | HVAC Heating and Cooling Refrigeration

Compressor Rebuild – This freshly rebuilt reciprocating compressor is destined for a large commercial chiller. Chillers chill water for air conditioning. Compressors compress refrigerant vapor and pump the compressed refrigerant to the condenser to be condensed into a liquid. The compressor provides compression which is an integral part of the refrigeration process. The old compressor was condemned for electrical burn out. The windings in the old one burned up and caused the circuit breaker to trip. (more…)

Refrigeration for HVAC | Air Conditioning and Heat Pumps

Refrigeration for HVAC

Air conditioners and heat pumps use the process of refrigeration to provide heating and cooling. What is the definition of the process of refrigeration? Refrigeration is the process of moving heat and depending on whether it is a heat pump or air conditioner and what mode it is in will depend where you are moving the heat. An air conditioner and a heat pump (in the cooling mode) will move heat outside. The evaporator coil absorbs the heat and the condenser rejects the heat. (more…)

HVAC Temperature Measurement Conversion

HVAC Temperature Measurement ConversionHVAC Temperature Measurement Conversion - In air conditioning and heating applications it is necessary to accurately measure temperature to offer control of the temperatures relative to the application for which the HVACR equipment is serving. There are four separate temperature scales used to measure temperature and it becomes necessary at times to have the ability to convert between the different scales. The two most common scales used by most people are Fahrenheit and Celsius. Fahrenheit is mostly used in the United States where the culture has resisted changing from standard measurements to the metric system. Celsius is used throughout the world including the United States and Canada. Scientist often use Kelvin and Rankine measuring scales to measure temperature. These temperature scales, Rankine and Kelvin, are uncommonly used in popular culture no matter where you live in the world except by the scientific community and are often used to measure extreme temperatures. (more…)

Old Leaking Condenser Coils

Old Leaking Condenser Coils

Old coil with HVAC Refrigerant Leaks

Old Leaking Condenser Coils

Old Leaking Condenser Coils (also referred to as freon leaks) can cause serious issues with HVAC heat pump equipment. HVAC refrigeration circuits are designed and built to hold the refrigerant. It is a sealed hermetic system. The HVAC refrigeration circuit should never need refrigerant. An HVAC refrigeration system does not burn refrigerant. The refrigerant is used over and over again to move heat from one place to another. Aside from a leak, once the refrigeration system is properly charged, the system should never need refrigerant for the life of the equipment. (more…)

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