5 HVAC Tips You’ll Want to Know

Tip 1: Properly label equipment and tools to prevent costly errors. Ensure that the appropriate refrigerant (R-22 and R-410A) and equipment is used, and that no cross-refrigerant contamination occurs. R-410A cannot be introduced into an R-22 system without undesirable and damaging consequences.

Tip 2: Keep HVAC vacuum pumps working at peak efficiency. Oil becomes contaminated with each use of the pump. Oil contamination reduces pump effectiveness. Change pump oil frequently to ensure efficient and effective pump operation.

Tip 3: When replacing a defective motor, it is import to also replace the capacitor. Motors rarely operate effectively with a worn or defective capacitor. If the motor does run, it will operate as if overloaded. The motor speed will be low and it will overheat. This activates the overload protector, causing the motor to cycle on and off. Replacing the capacitor is an inexpensive way to ensure long motor life.

Tip 4: Do not use a replacement motor that has a nameplate ampere rating lower than the old motor. The replacement motor may have nameplate amps up to 25% greater than the old motor. Ampere ratings too low or too high compared to the old motor cause overheating and premature motor failure.

Tip 5: The voltage listed on each capacitor should be thought of as an “up to” rating. In other words, a 440 volt capacitor may be used on any system up to 440 volts. So a 440 volt capacitor will work on a 370 volt system. Be sure the rated microfarads match the system requirements. While shopping, if you can’t find the right 370 volt capacitor, check the 440 volt sizes.

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