Today’s high-efficiency furnaces rely on high-tech components to run efficiently. Although maintenance tips are few and simple, it never hurts to keep these tips fresh in the minds of service technicians.
Megohmmeters (meggers) are electrical meters used to check the resistance and condition of the motor windings and the condition of the refrigeration and oil environment around the motor windings. A megger is nothing but a giant ohmmeter that creates a very large dc voltage (usually 500 volts dc) from its internal battery.
High-efficiency furnace motor Rescue EcoTech® dramatically upgrades the electrical efficiency of a furnace while lowering operating costs and improving comfort. Through its patented design, an ECM motor connects directly to the furnace board in just the same way as the existing PSC motor it is replacing.
The Eon 42 variable-speed, constant-torque motor is designed for direct-drive blower applications such as fan coils, kitchen ventilators, air curtains, and unit heaters/coolers. According to the manufacturer, the motor saves up to 56 percent of the electricity consumed by the motor.
Four replacement iMotors have been added to the iMotor line of electronically commutated motor (ECM) products. The motor design now has a total of 14 motors.
In the warm summer season, cooling equipment operates at near peak capacity. If that equipment is used for critical building functions, any equipment downtime for whatever reason is unacceptable.
A preventive maintenance program at a leading New England Ivy League university demonstrates how the push for more sustainable building management has led to a growing awareness of a chronic, widespread problem for HVAC motors: electrical bearing damage.
Btu Buddy has met Bob for lunch to answer some questions that Bob had about yesterday’s service call. Bob asked, “Why did that motor have two contactors and so many wires going to it? It seemed very confusing. I am glad that I tagged those motor leads when I disconnected the motor. I never would have figured out how to reconnect the leads.”
We all create our own individual histories every day. At the same time, we become part of a larger history. With that in mind, we asked a few industry colleagues what the most significant changes were that they have witnessed in the HVACR industry.
Bob got a call to go to a convention center where the air conditioning system was not working. It was a 75-ton unit with one compressor. The system was many years old, but had been functioning fine, until now. After checking out the unit, an ohm check showed 0 resistance to ground.
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