Looking for HVAC help with high humidity-Chicago area

[CathyAnn]

Greetings,

I am looking for a competent HVAC tech to help us determine our problem of high humidity levels and how to correct them.

We installed a 2 stage York furnace a few years ago, but did not need new AC unit.

Anybody here??

[tinner73]

where are you located?

[CathyAnn]

Thanks, Tinner. Southwest suburbs.

[skippedover]

Doesn't really matter where you're located as far as high humidity is concerned but I do understand you're searching for someone to come out to your home. We're a little too far away for that but you say you replaced your furnace but the AC system didn't need to be replaced. Fair enough but is this high humidity problem something new since the furnace was installed? And I reallly hate to ask this question but did the installing company do a Manual 'J' heat load analysis on the home before selecting the furnace?

[Some Dude]

Talk about hitting a home run,

[Ti Llaves]

Greetings,

I am looking for a competent HVAC tech to help us determine our problem of high humidity levels and how to correct them.

We installed a 2 stage York furnace a few years ago, but did not need new AC unit.

Anybody here??

Was the unit working okay when you first had it installed in both cooling and heating modes? And may you give me the make, model and serial numbers of both the indoor and outdoor units, as well as the thermostat info? I may be able to help.

[CathyAnn]

It is a York Affinity PVC9CONUP11 92.02 two-stage.

White Rogers IF85-275 programmable thermostat.

The AC is a Concept (still looking for info)-don't think I have the manual anymore.....

Two story- 2900 square foot house. Fan set on "high" for cooling cycle.

[dash]

It is a York Affinity PVC9CONUP11 92.02 two-stage.

White Rogers IF85-275 programmable thermostat.

The AC is a Concept (still looking for info)-don't think I have the manual anymore.....

Two story- 2900 square foot house. Fan set on "high" for cooling cycle.

If you are running the fan,24/7 on high,that's part of the humidity issue.The "wet" coil when the compressor is off will humidify your home.

New furnace may be suppling more air then is required,which will increase humidy as well.

[yourairman]

The midwest has had a very cool july and we have had alot of complaints in the kc area about high humidity levels. The majority of these complaints are associated with run time of the AC. The ac will dehumidify but has to run to do so. If it is 80 degrees outside and you have the thermostat set for 76 than the ac will not dehumidify as much as if it was 95 outside with the thermostat set at 76.

[CathyAnn]

The fan is set to "low" for heating and "high" for cooling.

Is there a way for me to reset the fan to a a lower speed?

Info on AC unit:

Concept by Armstrong-

http://img.photobucket.com/albums/v352/CathyandDan/IMG_0926.jpg

[beenthere]

Have your contractor come out and set up the Climatrac feacture of that furnace.
That will help with the humidity.

[CathyAnn]

Thanks.....can you be more specific about the Climatrac?

[beenthere]

It controls blower ramp up.

Can br set to run the blower at 50% of high cool spedd for .5 minutes, then 80% for 7.5 minutes, then100% if still receiving a cooling call.

Your contractor should have set it up when he installed the furnace.

[johnt2_2002]

It controls blower ramp up.

Can br set to run the blower at 50% of high cool spedd for .5 minutes, then 80% for 7.5 minutes, then100% if still receiving a cooling call.

Your contractor should have set it up when he installed the furnace.


My unit however does not ramp up the way you said at all. it usually just goes to 100% capacity from start. But again, it could just be the way its set up!

[beenthere]

My unit however does not ramp up the way you said at all. it usually just goes to 100% capacity from start. But again, it could just be the way its set up!
Then its not set up for a humid area.

Plus the wiring instructions in your post I deleted were wrong.

[johnt2_2002]

your probably right, now that i think about it, i dont think it is. eventually Ill go and check what the settings are on it and verify with the install manual. Whatever the case, its doing an excellent job with the A/C!!

[CathyAnn]

Thanks for the info, beenthere.

Is this something I can do myself? I have the install manual and it appears it is just a matter of moving the tap.

[beenthere]

Just have your contractor do it during his yearly PM/service check.
Then he can check and make sure it doesn't have an adverse effect on the compressor.
During the slow ramp up.

Compressors aren't cheap.

[teddy bear]

Get your a/c working as best as you can. The cold air supply should a minimum of 20-25^F temperature drop to remove moisture. The cooling cycles should be as long as possible. You may help this by raising the temperature setting when you are away during the day and lowering the temp on return. This will give you a long run necessary for the a/c to remove moisture.
After all that get yourself a good whole dehumidifier to maintain <50%RH when the a/c does not have a high cooling load. In green grass climates, maintaining <50%RH require 30-70 lbs. of moisture removal everyday. With only 3-6 hours of short cooing cycles, no a/c can really dryout a home. During rainy cool weather, there no drying onless you have of the these wholes house dehus. I work for Therm-Stor, we make the best dehus in the world. Checkout Ultra-Aire/Santa Fe. There are others that are good also.
Regards TB

[CathyAnn]

bump....new problem, new thread