Refrigeration

HVAC Refrigeration category offers detailed information about refrigeration and HVAC.

HVAC Triple Evacuation | Heating & Cooling Refrigeration

HVAC Triple Evacuation There is definitely some confusion among HVAC/R technicians about the proper methods of evacuation before introducing the refrigerant to the refrigeration circuit. Let me be clear from the start that my methods of evacuating a refrigeration circuit are based on experience, education and an official guide produced by the US Military and […]

Compressor Overheating Troubleshooting | Air Conditioner Repair

Compressor Overheating Troubleshooting | Air Conditioner Repair What you will learn from this article: 1) Avoiding the problem of compressor over-heating 2) how does compressor overheating effect the refrigeration system? 3) diagnosing compressor overheating 4) repairing the problem of compressor overheating and future prevention 5) lots of related links to help you learn Compressor Overheating […]

Evaporator Coils Dirty and Ice On Air Conditioner

Evaporator Coils Dirty and Ice On Air Conditioner Evaporator Coils Dirty and Ice On Air Conditioner – It was a very hot day and I got a ticket to respond to a call for no cooling. The customer said there was ice on the air conditioner. The secretary instructed the customer to turn the AC off […]

Refrigeration Piping Design & Installation Practices

Refrigeration Piping Design & Installation Practices Refrigeration Piping Design – Installing a new air conditioning and heating system requires skill and knowledge of proper procedures in electrical wiring, controls wiring, and pipe work. On commercial projects a skilled electrician handles the electrical hook ups, a controls technician handles the control wiring, and a pipe fitter handles […]

Two-Stage Scroll Compressors | Refrigeration & Cooling

Two-Stage Scroll Compressors Two-Stage Scroll Compressors – For many years HVAC manufacturers used two compressors in their higher efficiency equipment to stage the air conditioner or heat pump for added efficiency. They would use a small compressor for the lighter loads or demands and then when the air conditioner or heat pump needed more demand […]

What is a Metering Device – Refrigeration Components

What is a Metering Device – Refrigeration Components What you will learn from this article: 1) We will answer the question, “What is a metering device” by defining the various types of HVAC equipment that use different types of metering devices and why. 2) How the metering device is involved in the refrigeration cycle 3) […]

Evaporator Coil for Heat Pumps & Air Conditioners | HVAC Refrigeration

Evaporator 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 Condenser for Air Conditioners and Heat Pumps| HVAC Refrigeration

The Condenser for Air Conditioners and Heat Pumps The condenser coil receives the high pressure high temperature refrigerant vapor from the compressor and immediately begins to remove heat from the refrigerant vapor. As the refrigerant vapor makes its way through the condenser coil more and more heat is removed and the refrigerant vapor changes state […]

The Compressor | HVAC Refrigeration

The Compressor | HVAC Refrigeration In a typical HVAC air conditioner or heat pump there are four major components that make the process of refrigeration work. Basically, this is how air conditioners work. And how heat pumps work. The first component in the process is a compressor or the heart of any air conditioner or […]

Refrigeration Pressure Switches | HVAC Systems

Refrigeration Pressure Switches | HVAC Systems What you will learn from this article: 1) the 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) […]

Variable Speed ECM Condenser Fan Motors | HVAC Refrigeration

Variable Speed ECM Condenser Fan Motors are used in condensers for the high efficient models so that the fan speed for the condenser can be modulated according to the load of the system. The ECM fan motors are used in condensers that either have a modulating compressor or condensers that have two compressors where one […]

Compressor Contactors for Air Conditioners and Heat Pumps | HVAC Electrical

Compressor Contactors for Air Conditioners and Heat Pumps – Compressor contactors are are simply heavy duty switches that allow it to carry extra amperage that is used by the compressor while it is running. The contactor is made up of a coil and typically two contacts for a double contactor and 1 for a single pole […]

Fixing a Refrigerant Leak | Air Conditioner & Heat Pump Diagnosis & Repair

Fixing a Refrigerant Leak Fixing a Refrigerant Leak – You had the new air conditioner or heat pump system installed some years ago and suddenly it stopped heating or cooling properly so you call the HVAC contractor to check it out. The HVAC technician arrives and spends about thirty minutes HVAC troubleshooting and then he comes […]

Condenser Fan Motor Repair | Air Conditioners & Heat Pumps

Condenser Fan Motor Repair | Air Conditioners & Heat Pumps What you will learn from this article: 1) Specific description of a condenser fan motors job along with some technical details 2) Air Conditioner & heat pump condenser fan motor operation 3) Condenser fan motor troubleshooting basics 4) Condenser fan motor repair warning and disclaimer […]

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 […]

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