Refrigeration - Articles - Page 48

Troubleshooting Defrost Timers

A faulty defrost timer in a refrigeration system can lead to problems

February 21, 2023

Technicians should learn how to troubleshoot defrost timers, as they can be the culprit if a freezer that uses an electric heater as its supplemental heat source has a frozen evaporator coil.

Troubleshooting Potential Relays

A malfunctioning relay can damage the compressor, so techs must understand the warning signs

John Tomczyk

February 15, 2023

If a potential relay is malfunctioning, the compressor motor is in danger of not starting, stalling, locking rotor, or even burning out. That is why technicians should understand how to troubleshoot potential relays.

Danfoss Expects Modest Growth In 2023

Energy efficiency, as well as decarbonization and electrification, are major trends

Joanna R. Turpin

February 8, 2023

Danfoss hosted its 27th annual press breakfast at the AHR Expo, offering insights into the current and future state of the company, as well as the HVACR industry.

Don Fort and intelliGen Refrigeration Controller

Basic Refrigeration: Thermodynamics of Heat Transfer

First in series describes how temperature and pressure changes affect refrigerant

Don Fort

February 1, 2023

Technicians should understand how heat transfer works in a refrigeration system, as well as the four laws that describe how temperature and pressure changes affect the state of refrigerant in a sealed piping system.

How To Solve The Refrigeration Technician Shortage

An NASRC report details ways to improve recruitment, training, and retention

January 31, 2023

NASRC has released a report summarizing the commercial refrigeration industry’s increasingly critical technician shortage.

The Refrigerant Transition Picks Up the Pace in 2023

Industry experts offer their views on the state of refrigerants this year

Joanna R. Turpin

January 24, 2023

The HVACR industry is undergoing another refrigerant transition and industry experts offer advice about what contractors need to know about the transition, as well as how to prepare for it.

The Definitive Guide to Temperature Glide, Part 2

Always consult the P/T chart when calculating superheat and subcooling for refrigerant blends

John Tomczyk

January 20, 2023

Service technicians need to be careful when reading the pressure/temperature chart because if they choose the wrong values, they will make mistakes diagnosing the system.

AHR Expo Will Host Innovation Award Winners

Innovation Award Winners To Be Featured at 2023 AHR Expo

Award-winning products in 10 categories will be displayed on show floor

Joanna R. Turpin

January 16, 2023

The winners of the 2023 AHR Expo Innovation Awards have been announced and they include products that can be used in just about every sector of the HVACR industry.

Avoid Careless Mistakes During Preventive Maintenance

Simple tasks can turn into big problems if proper precautions are not taken

Joe Marchese

January 13, 2023

Conducting planned maintenance on refrigeration equipment is beneficial to both equipment owners and contractors. However, simple tasks can turn into problems if not done properly or without taking the necessary precautions.

EPA Kicks Off Reclamation Rulemaking Process

Agency looks to increase refrigerant recovery/reclamation as HFCs are phased down

Joanna R. Turpin

January 12, 2023

The EPA — with the help of stakeholder input — is in the process of establishing regulations that are designed to maximize the reclamation and minimize the release of certain HFC refrigerants from equipment.