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  1. different sized evaporator and condensor and cfm/ton question

    I just became aware that our evaporator coil is 3.5 ton and the condenser is 3 tons. I was kinda surprised at first but googled around a bit and it appears it isn't unusual for the evaporator to be...
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    I definitely wasn't planning on removing or...

    I definitely wasn't planning on removing or moving any refrigerant lines. Just noting it sucks I can't access the coil to clean it.
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    There is indeed a piece of sheet metal that can...

    There is indeed a piece of sheet metal that can be unscrewed to reach the underside of the A frame. Unfortunately, copper tubing for the refrigerant runs up and down along side of it with about only...
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    Thanks, going to look and see if the entering...

    Thanks, going to look and see if the entering side is accessible by removing a triangular piece of metal. It is an A coil.

    Not surprised they don't do much. I wasn't sure how they would be able...
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    foaming coil cleaners

    The ones that you just spray the coils and then run the ac for a while so the condensate drains the stuff away. Do these work in everyone here's opinion? Do they help even a little or do they do...
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    I wasn't going to change the wiring, I was just...

    I wasn't going to change the wiring, I was just wondering if the thermostat being wired to stage 1 vs stage 2 could affect which cfm values are blowing (stage 1 or 2) even if it's a single stage ac....
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    thanks for the replies. one last thing, should I...

    thanks for the replies. one last thing, should I disregard the stage 1 cfm numbers if the ac is single stage even if the thermostat is wired to y1?
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    I mostly just wanted the airflow that is most...

    I mostly just wanted the airflow that is most efficient for the system. Also, it's a two story home with the upstairs getting warmer than the down. I close some vents downstairs to force a higher...
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    It was set to high after it was installed. It...

    It was set to high after it was installed. It blew massive amounts of more air than the previous furnace. It has dip switches so it's easy to change the blower speed. It's set to medium-high right...
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    trying to figure out blower cfm

    I see lots of people on the internet claim blower cfm is usually around 350-400 per ton of ac. What I don't understand is that according to my furnace manual, even having the blower set to low is...
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    i'm closing the registers. some branches have...

    i'm closing the registers. some branches have dampers and some don't. does it make much of a difference between closing the register vs damper?

    in the winter everything is opened which works well...
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    is there any way to get a rough estimate of...

    is there any way to get a rough estimate of static pressure without having someone come out or buying an expensive tool?
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    increasing duct pressure from closing vents

    I've got a two story house with a hot upstairs in the summer. Closing downstairs vents help tremendously, but I was wondering if I could possibly damage the hvac blower or shorten its life if I...
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    if temp over rides the cph, what's the point of...

    if temp over rides the cph, what's the point of it? does adjusting it even do anything?
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    just to be sure, does that mean if on the vision...

    just to be sure, does that mean if on the vision pro 8000 series I have the CPH to 4, when the demand for cooling turns on, it will stay on for at least 15 mins? and after it turns off, it will stay...
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    okay...so not all programmable ones will have a...

    okay...so not all programmable ones will have a cph setting? what high end non box store models are there? I was under the impression even the vision pro series didn't have a cph setting.
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    I have not found that to be the case unless I'm...

    I have not found that to be the case unless I'm mistaken on what the cph setting is. I currently have a programmable honeywell Model # RTH2300B and only the heating cph can be set. the manual says...
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    thermostat with CPH setting

    I've been looking for a thermostat with a cooling cycles per hour setting and it looks like almost none offer this. The only one I've found so far through from searching this forum is the honeywell...
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