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Flame Sensing - The Basics
Proving flame is an important part of the gas firing sequence. Without proof of flame, you risk dumping unspent gas into the heat exchanger, resulting in an explosion. There are many ways to “prove flame,” but we are focusing on the flame sensing rod (flame rectification) method here. Here are the facts: Flame sensing rods, […]Read more
How a Heat Pump Reversing Valve Works
If you don’t have a gas furnace or fireplace in your home, your unit’s reversing valve is probably your best friend during the winter months. As their name suggests, reversing valves reverse the refrigerant flow to send the hot, compressed vapor to the indoor coil instead of the outdoor coil. The system releases heat into […]Read more
Can A Motor Run Backwards by Swapping Run & Start?
Can a single-phase motor run backward when start and run are swapped? The answer is (generally) yes. Is the motor designed to run backward by simply swapping run and start? The answer is (generally) no, with a few notable exceptions. Before we jump in, this article has two purposes. #1 – it helps you understand […]Read more