1. Phaseout Schedule for HCFCs
(HVAC & Energy Library/Residential Information)

... equipment that uses ozone-friendly refrigerants. Many homeowners may be misinformed about how much longer R-22 will be available to service their central A/C systems and heat pumps. This fact sheet provides ...

2. Service Clinic: TX Valve Basics
(HVAC & Energy Library/Technician Resource)

Refrigeration Basics: Optimizing System Performance Using a TXV By Al Maier The thermostatic expansion valve (TXV) is a precision device designed to regulate the rate at which liquid refrigerant ...

3. Service Clinic: The Art of Troubleshooting
(HVAC & Energy Library/Technician Resource)

Rediscovering the Art of Troubleshooting By Gary Hodges Advanced electronics enables the HVAC service technician to work faster and in some cases, with greater accuracy. But good, painstaking troubleshooting ...

4. Service Clinic: The Importance of Benchmarking
(HVAC & Energy Library/Technician Resource)

... 1977 as a serviceman, supervisor, instructor, and consultant. He joined the Refrigeration Service Engineers Society (RSES) in September 1992 and became a Certificate Member (CM) within three months. He ...

5. Service Clinic: Compressor Replacement After a Burnout
(HVAC & Energy Library/Technician Resource)

Steps to Compressor Replacement Following Burnout By Dave Irvin Manufacturers' recommendations provide the best advice when it comes to choosing the replacement compressor. It may be stating ...

6. Service Clinic: Mystery of Superheat
(HVAC & Energy Library/Technician Resource)

... of these measurements are taken near the suction side service port (Figure 2). Fig. 2. Actual superheat measurements. The suction line temperature and pressure are measured to calculate actual superheat. ...

7. Service Clinic: Subcooling & Superheat
(HVAC & Energy Library/Technician Resource)

Subcooling and Superheat: Superheroes of System Charging By Skip Egner Here's a common scenario. You go on a service call, put your gauges on a condensing unit, and find that the suction pressure ...

8. Service Clinic: Coil Cleaning
(HVAC & Energy Library/Technician Resource)

... a new one. I learned that you must rinse coils after using these cleaners — I recommend 30 minutes minimum — in order to ensure they're not leaving any corrosive coating. Most service technicians ...