Carrier Infinity control lowest humidity setting 46%

[OldSoCalCondo]

Well, I just had the complete Infinity system installed, AC, Furnace, and Control. The unit is communicating and reading correct outdoor temp. I have set the basic Himidity setting to one bar/one box on the left. In advanced, the lowest it will let me set it is to 46% which is also all the way to the left. The actual humidity reading is off, so it would be nice to use the setup option of off-set to correct this. But because of the off-set error on the high side, I can't even use it to get much below the reported target of 46%.

So my question is why is the lowest target setting possible only 46%? I bought this system so I could at least try to get the condo down to 35% humidity, but this won't even let me set it that low. Am I missing something in the setup or configuration?

Please help as this is very important to me and the reason I spent thousands extra...

Thanks,

Keith

[Airmechanical]

Well, I just had the complete Infinity system installed, AC, Furnace, and Control. The unit is communicating and reading correct outdoor temp. I have set the basic Himidity setting to one bar/one box on the left. In advanced, the lowest it will let me set it is to 46% which is also all the way to the left. The actual humidity reading is off, so it would be nice to use the setup option of off-set to correct this. But because of the off-set error on the high side, I can't even use it to get much below the reported target of 46%.

So my question is why is the lowest target setting possible only 46%? I bought this system so I could at least try to get the condo down to 35% humidity, but this won't even let me set it that low. Am I missing something in the setup or configuration?

Please help as this is very important to me and the reason I spent thousands extra...

Thanks,

Keith

are you trying to grow dust mites?

35% is too low!



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[pateman29]

45-50% good range

[OldSoCalCondo]

My Condo is at 50% now but in various places I get mold and mildew. I would be happy if I actually got the house down to 40%. I can ramp the humidity up once I get rid of the problem and I find the point where it doesn't return.

But that is not the point. I can't even set it for 45%?!? So far I can only set it for 46% and because of the my other three humidity sensors say the carrier reading is wrong, I can't even hit 46%. So before Carrier Infinity 50%, after Carrier Infinity 50%. I feel I wasted my money. Although I am happy for the quieter fan, but...

Anyway, can it not be set below 46%?

[beenthere]

One of the Infinity guru's will come along soon.
Which Infinity system did you get, is it the 2 stage.

[sneezer]

are you trying to grow dust mites? 35% is too low!

High humidity is needed by dust mites. Below 50% really inhibits them. The health problems associated with very low humidity are due to over-drying of respiratory epithelium.

In order to keep some parts of the home below 50% it seems like the OP ought to be able to make the set point below 46%. In order to “cure” the existing mold problem OldSo ought to keep it pretty low for a few weeks.

It is not clear to me if the control can not be set below 46%, which would be stupid, or the system can not achieve below 46% which would be understandable depending on the temperatures and heat gain of the condo.

[acmanhoney]

High humidity is needed by dust mites. Below 50% really inhibits them. The health problems associated with very low humidity are due to over-drying of respiratory epithelium.

In order to keep some parts of the home below 50% it seems like the OP ought to be able to make the set point below 46%. In order to “cure” the existing mold problem OldSo ought to keep it pretty low for a few weeks.

It is not clear to me if the control can not be set below 46%, which would be stupid, or the system can not achieve below 46% which would be understandable depending on the temperatures and heat gain of the condo.

GO PRO

Well said..the control will run the a/c at lower stage and fan speed to remove more humidity but it wont allow the system to cool past 70,, in the summer it is usually difficult to reach below 50% humidity in my area, and the tightness of your house and ducts must be addressed..you can have a carrier rep come to your home and inspect your equipment...dont worry, be happy you have one of the most advanced systems on market, make sure all other possibilities are checked out because ive seen this system in action and have several happy customers.


and it doesnt go below 46% because thats extreme for summertime

[jrbenny]

HVAC systems are not engineered for the dehumidification that you desire. Thus, the Infinity UI does not allow 'overcooling' to dehumidify below 46%.

Hopefully, you weren't sold this system with a promise of 35% RH.

Unless you add a separate dehumidifier, it ain't gonna happen.

You need to address the envelope leak issues in your home and duct system.

Perhaps a stand alone dehumidifier to dry the home after the home and duct system are sealed properly.

[Airmechanical]

High humidity is needed by dust mites. Below 50% really inhibits them.

wrong!



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[thorton]

HVAC systems are not engineered for the dehumidification that you desire. Thus, the Infinity UI does not allow 'overcooling' to dehumidify below 46%.

Hopefully, you weren't sold this system with a promise of 35% RH.

Unless you add a separate dehumidifier, it ain't gonna happen.

You need to address the envelope leak issues in your home and duct system.

Perhaps a stand alone dehumidifier to dry the home after the home and duct system are sealed properly.

JR Benny is right, "if" you have your control mode set to cool to dehumidify. This is where the dehumidification set point comes into play and does not allow ovecooling by more then 3 degrees while attempting to satisfy a dehumidify demand. If you use the "normal dehumidification operation" this will allow a lower cooling set point and you should be able to achieve a lower % dehumidification. I'm not stating that you can reasonably reach 35 % set point, though. But it's worth a try.

thorton
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[OldSoCalCondo]

OK, I understand the system won't cool too much to reach the desired dehumidification. In fact the manual as much as states that when the talk about the two modes of dehumidification. The normal(off), and the humidification mode (on) where it will go up to five degrees past the set point to try to reach the target humidity level.

If I set it to a low number and it doesn't make it, then I will say at least I tried the best. I mean they do sell this system as being able to control humidity. I forget the marketing term.

I understand there is only so much the system can do. And obviously if I set it to 15%, it won't be able to do without a dedicated dehumidifier. The question and the point is that I can't even set it to 45%. Is even 45% too low to be able to set it to?

So to answer the questions, it is a two stage two ton Infinity condenser, matched to a 80% Infinity Furnace, with Infinity control. The system was just installed brand spanking new. I tried the Dehumidify setting to On, which allows it to go up to five degrees past the set point, and the Off setting, which is like a normal setting. In both cases I can only set it to a target of 46%. As far as I know there are three places that control the setting. In basic there is the bar graph, no numbers shown, in Advanced there is a bar graph that shows numbers That go from 46% in steps of 2% to I think the high of 54%. And then in the initial system install mode there is a Off-set of plus or minus 10%. But I believe this is meant to calibrate the humidity reading to a correct or differential reading. Because the reading is off, I am able to use this but only to gain a few more lower humidity percentages. But this setting doesn't change the low set point of 46%. Does that all make sense?

What doesn't make sense is that Carrier would say the lowest a home owner can or should set the Humidity level to is 46%. I mean why not 45%? I feel I have been very thorough, but I must be missing something???

Thanks for the help.

[acmanhoney]

the unit helps control humidity but its still an a/c, you could have a leaky pipe.

when you set it at 46% does the unit cool past your set point and how much?

if you wanted it below 46 it would not cycle off, so if you wanna try and get it below 40% your house will be very cold, its designed for cooling the humidity stuff are features.

[ibis1]

I have a Nordyne IQ Drive which has a humidity setting down to 30%. I keep it set at 40% and measure the RH at 43 to 44%. This keeps my home very cool, so I have not tried to set it any lower. It goes in 5 deg steps so I could set it at 35 or 30%, but don't know if it would drop any lower without dropping the temp to an uncomfortable degree. I live in SE Florida with very high humidity levels, so 30% may not be atainable. ibis