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

... TXV controls only one thing: the rate of flow of liquid refrigerant into the evaporator. The TXV is not designed to control air temperature, head pressure, capacity, suction pressure, or humidity. Attempts ...

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

... minutes of run-time ensures that there is a full column of liquid at the TXV inlet and the system is stabilized and ready for accurate superheat and sub-cooling temperatures to be taken. Most manufacturers ...

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

... cooling air temperature by 4 degrees” than it is to hear, “Why was there a gap behind my coil pan?” TOOLS FOR THE JOB Having the right tools will, of course, facilitate your benchmarking program. ...

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

... properly, the best way to avoid improper charge on such systems is to compare actual superheat to target superheat. Superheat is a temperature rise above the saturation (boiling) temperature of a substance ...

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

... getting to the evaporator. To check superheat, attach a thermometer designed to take pipe temperature to the suction line. Don't use an infrared thermometer for this task. Then take the suction pressure ...

6. Technical Q&A
(Residential/Residential Clients)

... act like an air conditioner, transferring heat from inside to out, or like a heater as it transfers exterior heat to the interior. A winter day with a temperature of 32º Fahrenheit still produces enough ...

7. What Size AC Does My House Need ?
(HVAC & Energy Library/Residential Information)

... portion of your air conditioner. If the air conditioner is oversized it will cool the house down quicker but then will shut off. The temperature will be right but the humidity may still be too high and ...

8. MCMECH Tours Goodman Facility
(News/Latest)

... in their units (ie: fan motors, contactors, circuit boards etc.). There is a host of environmental chambers that simulate everything from a 140-degree F. day, salt-water mist, freezing temperatures. Anything ...