Carrier Infinity 58 MVP staging

[gyuri1]

I have this unit for a good year,runs alright, i had set the staging for low since it used to rev up when the new setting came on ,techie told me i should set it to low, now is cold here midwest ,and i change it to setting: furnace, and watched it ,and when in middle of night came on only to high stage:
for 6-8 minute until it reached the tstat setting,these were also on the pad: blower speed:1050, static: 0.70, air flow 1350 .
Then in morning when the wake came ,is was really reving up for long time to reach 68F [night was 65F ,but the smart resume started 90 minute earlier] anyway when i ogt out bed i change the tstat setting staging to:system, will see .
Any input apriciated, thansk

[jrbenny]

Why would you not let the UI do the staging? (SYSTEM)

If you don't like it going to high because of the noise, it's a duct design issue.

In my opinion, 0.7 IWC is too high. My system is 0.37 IWC in high cooling.

[gyuri1]

jrbenny
thanks for answering, but i do let now to do the "system" do the staging, i tried "furnace" for night, and it always was high stage in service- read out, the duct is brand new also 1 yr.old, is a single story house, run in crawls pace ,and in fam room,all regs are open fine.

[plain spoken]

Just because the duct is new does not mean it is the correct size. Noise in high speed caused by more air movement is a duct issue.

Put the UI on system control and leave it alone. This will allow the control to operate the furnace in the best manner possible.

[thorton]

Right-on, Plainspooken! Just because ducts are new, doesn't mean they are right. No truer words have ever been spoken.

Thorton
_____________________________
Adversity does not build character…it reveals it.

[gyuri1]

thansk guys, what is mean UI?
The noise is not bother me so much [is not verry noisy let say],
LAst year htey have to replace 4- 90degree elbows to 45 degre in the furnace room ,that took care of balance in LR DR KTChen, trunk run 16x8,with 6 boots , bedroom and family room in basemnt was alright same size just shorter 7 boots.Thansk

[jthomas21]

That .70 Static may not be accurate. Check the static while your unit is running at 1440 instead of 1350, and pull those stats. You can either run the fan on high, and check that or put your furnace in efficiency mode, and run it on high heat.

My software seems to have a bug where when it runs in effiency heating mode. The UI reports lower airflow with higher static, but the blower speed doesn't change.

I do wish the unit would stay in low stage longer during recovery from a setback, or at least give a little more control over it.