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I simply am unable to put my hands on the schematic. Compatible with Trane systems or any standard HVAC system. Changing the Blower Speed on a Furnace - YouTube We also have quick reference cards for use out in the field! I'm also a little concerned that this furnace might be a little undersized for our house (if I understand correctly, its a 100 BTU unit). You may freely link Adjusting the Airflow Speed on ECM Blower Fan Motors! He farmed commercial garden produce for several years. BarnArtist, locate the wiring schematic on your furnace. Using a hammer, lightly tap out the blower motor shaft (fig.6.7) to loosen the blower motor from the fan shroud (fig.6.8). By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Locate your thermostat on the page and click System Mode. I can unsubscribe and opt-out from future communications at any time. This value is then multiplied by 150 cfm to obtain the required airflow for the furnace in heating operation. All information is provided "AS IS." Stage 2 Aux Heating. 3 of the wires will likely terminate with just a twist on cap. Now that would turn the blower speed down on you. The gas kicks on and is lit by the ignitor. Sign up for our email newsletter to learn helpful HVAC tips and tricks before your purchase your system. But the 'real' one will be the one connected with a twist on cap to the fan motor. Thanks for contributing an answer to Home Improvement Stack Exchange! You need to find the wires that determine blower speed inside your furnace. -The BTU/HR size is selectable between 48,000 42,000 36,000 or 30,000 BTU/HR. Does lowering the blower speed of a forced-air furnace lower its efficiency? ago. Cut the wire's terminal connector off with wire cutters. Yes, there is a way to bring up the speed on the air handler.. I do know that my entire furnace runs safely on a 15amp breaker with the blower on high, the burner running, the humidifier running, and the water pump to empty the humidifier running. This is NOT a user servicable item. Step 2: Create a Safe Workspace When working with any unit connected to electricity, it's important to turn off the power to prevent electrocution and damage to your furnace. There are only a few steps required for most units and having the control will allow you to get your unit to give you the service you need. I needed to go the opposite direction and increase fan speed. The best answers are voted up and rise to the top, Not the answer you're looking for? The house has a 3 ton trane xl20i and an xv80 (4 ton max). Air flow - American Standard | Air Conditioning and Heating | HVAC The higher the MERV rating, the better the filter is at capturing specific pollutants from the air. Only swap these two wires.