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-   -   How to get AC compressor to run 30 seconds before blower (http://www.diychatroom.com/f17/how-get-ac-compressor-run-30-seconds-before-blower-171140/)

jerral 02-05-2013 05:10 PM

How to get AC compressor to run 30 seconds before blower
 
How can I get the compressor to cool the A-coil for 30 seconds before the blower engages?

bobelectric 02-05-2013 05:31 PM

Check out time delay on relays from www.time-mark.com

bobinphx 02-06-2013 10:21 AM

its fairly easy. you want to control the fan relay, so just add a time delay relay into the fan circuit. I did something similar to the evap cooler. I turned on the pump 1 min before the fan. I found really cheap delay relays on the internet and wired it in. but be careful, as you are around 220v and that can get you!!!!

Missouri Bound 02-06-2013 09:04 PM

Quote:

Originally Posted by jerral (Post 1110314)
How can I get the compressor to cool the A-coil for 30 seconds before the blower engages?

Why? :eek:

gregzoll 02-06-2013 09:45 PM

Quote:

Originally Posted by jerral (Post 1110314)
How can I get the compressor to cool the A-coil for 30 seconds before the blower engages?

So you want to shorten the life of the outside unit, why? Relay's are used to usually keep the outdoor unit from coming on right away, if there is a power drop while it is operating, and power comes immediately on.

As long as the outdoor unit and indoor coil are doing their job, and the inside air handler/furnace is also doing its job, there is no need for a 30 second cool down. Matter of fact, with my a/c, I can stick a six pack of beer in the vent, and cool it down within a hour of running, due to always pushing at least 36 degrees, no matter how warm the house is during the Summer.


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