View Full Version : Carrier over AMP
04-12-2008, 05:45 AM
Mod #48tmf025 100% o/a pops blower braker. Any way to set max open on econo
04-12-2008, 12:34 PM
I'm not familiar with that particular model number, but Carrier units large enough to have a breaker for just the blower are similar. Its unlikely the economizer will cause this. Its a motor, belt, or blower problem. There is usually an adjustment on the damper motor or via the linkage.
04-12-2008, 03:55 PM
sounds like the blower is not set up right. Assuming the breaker and wiring is ok. 100% outside air you are moving more air than you are when going through return air. Is the return big enough? For now I would adjust blower speed to get the amps where you need it while the outside air is open. Then I would get an air balance to see where you are at.
04-12-2008, 06:24 PM
What is the lenth of your supply duct and return duct ,what controller is on the economiser?
04-12-2008, 07:34 PM
Some chuckle-head might have just opened the sheave instead of adjusting the belt correctly. Wish I had a dollar for every time I've seen that. Check here http://www.xpedio.carrier.com/idc/groups/public/documents/techlit/48h,t-4pd.pdf for the blower charts though to see what it should be.
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