Oh boy, here we go. :gah: So, the new air handler was installed today. When I returned home, the system was operating, and the air handler is very loud. I contacted the HVAC tech and he stated that it was at the correct speed. He mentioned that since the old blower was failing that it didn't have sufficient air flow and that is why it was quieter. The air flow out of the air ducts seems quite strong compared to before. They installed a AMST36CU1400 and my outside condenser unit is a GSX140311. Is it that I am not used to the sound of a new air handling unit? Thanks for your feedback.
New Air Handler Installed (Very Loud)
kaizen099
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So, your load calc says 22,000 BTU's and they installed 28,000?
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Waiting to hear these numbers........
And as indicated by "pecmsg":
Looking at the technical specs on your outdoor unit (GSX14030), with a similar 3 ton indoor unit, you have roughly:
28,000 Total Capacity
22,000 Sensible Capacity
6,000 Latent Capacity
So your current system based on the load calculation you provided is over-sized.
Hi, thanks for the replies, dan sw fl did a rough load calculation, I do not have a fresh air system. I am not sure if the additional air volume added by the vaulted ceilings is included in the load calculation. Will that additional 10% humidity be removed once the correct blower speed is set based on static pressure? Hopefully the supervisor doesn't give me a hard time.
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Are you heating or cooling?
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Thats why the RH is high.........Not enough run time due to oversizing.
Thanks, but once the correct blower speed is set (9 speed settings) can it reduce that additional 10% humidity? If the air flow is slowed down over the evaporator coil it should reduce a bit more humidity. My previous set-up was a 2.5-ton evaporator coil with a 2.5-ton condenser. When I first moved in, I had a 3-ton condenser installed with the existing 2.5-ton evaporator coil and it caused very low humidity (around 35% to 40%). The evaporator coil was way too cold and removing too much humidity. Now it's the opposite, I have a new 3-ton evaporator coil with the existing 2.5-ton condenser. I've read in the forum that it's not a problem if a slightly larger evaporator coil is installed as long as the correct fan speed is installed. It's a .5-ton difference. I would like the relative humidity to be maintained as before between 45% and 50%. Do I have them uninstall the 3-ton evaporator air handler unit and have them install a 2.5-ton evaporator air handler unit and just pay for the labor? Thanks.
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16,278 Posts
OK, .. we will hold you to it:grin2:
Hi good morning, so supervisor came by today. They didn't measure static pressure, he said wasn't necessary as the motor adjusts the speed automatically. :gah: He opened up the air handler and stated the speed could not be adjusted. I had a conversation with him regarding the static pressure, blower speed and humidity removal. I took a picture of the inside when he removed the cover. Isn't this where the blower speed could be set? I am asking because now I need to contact another HVAC company to properly measure static pressure and correct blower speed. Thanks again.
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It should not matter to you, it matters to the technician. High voltage is exposed in that cabinet. It is dangerous for untrained personnel to touch anything in there without knowing what they are touching and having the ability to test for potential voltage.
This falls under the no DIY rule of this site. If you go any further with this line of questioning, the thread will be closed.
This falls under the no DIY rule of this site. If you go any further with this line of questioning, the thread will be closed.
Hi kdean1, I am surprised at this reply. I have over 100 posts on this forum. I have never asked how to do a DIY on this forum. I stated in my post that the HVAC tech was the person who opened the air handler cabinet. "He opened up the air handler and stated it could not be adjusted". I did not ask how to change the blower motor speed. When the HVAC tech opened the cabinet, I asked to take a picture of the inside. I am simply asking if the HVAC tech is accurate. He told me that the speed could not be adjusted. I did not open the air handler, the HVAC tech opened the air handler, I took a picture to share on this forum and he closed it. I want to be clear on this. I now have to call another HVAC company to properly test static pressure and adjust the blower speed. Thank you.
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This is a public forum. Anyone seaching online can use the posts to further their DIY efforts, regardless of your intent. We do not support homeowners opening their units because of the potential danger. Most manufacturers have labels on the units that there are no user servicable parts inside for the same reason.
Yes, the blower speeds can be adjusted inside the unit. But pointing you or others who find this thread to where to do that is outside the intent of this forum.
I agree that you need to hire another company to measure static pressure and adjust your blower speed, but if they need your help to adjust the settings, they are not the company you want.
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They probably will be happy also, as if you got some sort of a mini labor warranty, they do not have to honor it anymore..Hi, thank you. I understand. I will update once the issue is resolved. I will no longer contact this company or refer this company. I am disappointed that they would tell me adjusting the blower motor was not possible.
Hi, yes the invoice states 1 year labor / 10 year all parts warranty. If the system does malfunction within the 1st year then I will call them, but as far as this issue is concerned I cannot use them. I just cannot believe that they tell me to my face that the blower speed cannot be adjusted.
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If they registered it or told you they where going to register it, it could easily fall through the cracks, if they gave you the serial number and gave you the site then it’s on you to register. You can go to Goodman warranty lookup page to see if they registered it.
Thinking if they ever find out another Company even just removed the panel and readjusted the blower fan speed that is sufficient reason to drop you and no more labor warranty IMO.
Hi, they gave me the registration certificate. I highly doubt they will know if someone opened the cabinet. The installer was a very nice guy, humble, he did a very clean install. The supervisor on the other hand didn’t seem to care and was looking at me like I was crazy speaking to him about “humidity levels”. He said no one has ever complained or asked to adjust “humidity levels”…I just shut down after that.
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