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On/off fan delay settings? On/off fan delay settings?
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Old 11-01-2009, 11:11 PM   #1
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Default On/off fan delay settings?
I've set the HEAT-OFF delay to 100sec, was set 140 originally but blew a lot of extra cold air, did not touch the others they are set:

COOL-ON: 4 sec
HEAT-ON: 30 sec

This is a Honeywell ST9120C fan controller, are those the correct settings for ON?

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Old 11-03-2009, 12:33 AM   #2
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bump, no guidelines?
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Old 11-03-2009, 08:38 PM   #3
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nobody understand the question???
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Old 11-03-2009, 09:16 PM   #4
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The cool on delay os set to your areas climate.
If your in a high humidity area. 4 sec is too short.
Heat delay, set it to where the air comes out warm but not hot at first.

There is no one right setting.
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Old 11-03-2009, 09:17 PM   #5
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I live in west michigan, I wouldn't say our summers are any more than mild... the heat-on delays are 4 or 30 sec, currently 30 sec and haven't tried 4 sec, the heat comes out pretty hot initially (and around 110f at the vents)
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Old 11-03-2009, 09:19 PM   #6
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4 would normally be too short.
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Old 11-03-2009, 09:22 PM   #7
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Quote:
Originally Posted by beenthere View Post
4 would normally be too short.
is that also too short for cool-on? see prevoius owner had a furance company replace the timer, when i moved in i figured out the reason it went BAD was because the drip tube needed cleaned and the timer board was getting wet... so they had set many things wrong, including the COOL FAN TEMP TO MEDIUM, set that to high and it worked much better... now i'm tackling these delay settings

currently the heat terminal is set to MEDIUM-LOW and produces about +50-55f at the vents, any reason I should go to MEDIUM?
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Old 11-04-2009, 05:56 AM   #8
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No. thats a good temp rise. Setting it lower will make the air warmer. But, you don't want it to be hotter then that. So leave it as is. Or it won't leave room for the filter to get dirty.
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Old 11-04-2009, 10:20 AM   #9
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i'm asking if there's any benefit in going from the existing MEDIUM-LOW to a slightly higher fan speed of MEDIUM?
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Old 11-04-2009, 12:04 PM   #10
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Nope.
Just makes the air cooler coming out of the registers.
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