Service and Maintenance - Articles - Page 8

Pressure Testing A System With Dry Nitrogen

This effective method verifies a system is leak-free

Joe Marchese

July 18, 2023

No Comments

Pressure testing a system with dry nitrogen can be a very effective method of verifying a system is leak-free.

Survey: Most Indiana Homeowners Unprepared for HVAC Emergencies

July 17, 2023

No Comments

The survey was designed to find out how proactive Hoosier homeowners are at keeping their HVAC and plumbing systems running properly, and whether they are prepared for the often unexpected and costly repairs needed if maintenance isn’t regularly performed.

Expert Tech Tips: Episode 2 – Measuring Superheat

How-to video: measuring superheat

July 16, 2023

No Comments

Don Fort, senior technical trainer, Heatcraft, walks HVAC technicians through the process of measuring superheat in a system.

Defining and Calculating Voltage Imbalance

Improper voltage is the one of the greatest causes of failed compressors in three-phase units

Paul Flora

June 28, 2023

No Comments

Saving one compressor will cover the cost of a voltage monitor and then some.

Locating and Repairing Leaks on R-290 Equipment

Working on systems using propane requires different service procedures

Joe Marchese

June 26, 2023

No Comments

Servicing new reach-in coolers and freezers containing R-290 is not tremendously difficult but does require some different servicing procedures.

Tracking and Counteracting Residential HVAC Installation Faults

Preliminary DOE study reveals only 23% of newly installed residential HVAC systems are perfectly charged

Herb Woerpel

June 6, 2023

One Comment

In the HVACR contracting realm, the quality of the service delivered ultimately dictates the level of success an HVACR contracting obtains.

Ignoring Advice on Nitrogen Purging Can Mean More Headaches for HVACR Contractors

Nitrogen purging while brazing refrigerant tubes takes only a few extra minutes, but many installers don’t recognize its importance

Brian Henderson

June 3, 2023

No Comments

A nitrogen purge is a simple HVAC process that will save money in the long run and keep customers happy.

Troubleshooting Worn Rings and Leaky Valves

Technicians must perform a complete service checklist to find the underlying problem

John Tomczyk

May 16, 2023

No Comments

Learning how to troubleshoot a system that is experiencing leaky valves or worn rings can be challenging, so technicians need to take careful measurements in order to isolate the problem.

Comparing and Contrasting PSC, ECM 2.3, and X13 HVACR Motors

X13 ECMs provide very efficient operation and tend to work well in single stage- and two-stage equipment

Paul Flora

May 7, 2023

No Comments

PSC motors can be referred to as constant speed motors; X13 ECMs can be referred to as constant torque motors; and ECM 2.3 variable-speed motors can be referred to as constant airflow motors.