OP
General Lee
Veteran Member
No, its actually this one - https://customer.honeywell.com/en-U....3.1.4.16&rank=1&v1=Sort.1.Product.Rank&asc=1
Any HVAC techs in the house?
- Thread starter General Lee
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No, its actually this one - https://customer.honeywell.com/en-U....3.1.4.16&rank=1&v1=Sort.1.Product.Rank&asc=1
OP
General Lee
Veteran Member
Its possible the T-stat may be "some" register air. There is a register on a perpendicular wall but not underneath the the T-stat.
It is not a variable speed unit. I kept my old oil furnace as back up and the whole system uses that indoor fan blower. It does have a speed setting and a few years ago it was adjusted. But now the sticker is gone that showed which wires need to be where for that fan speed. And what exactly will a slower fan speed do? There is a TXV valve on the coil because that or the first new coil was not working properly, hence the new coil install the second time they came out.
LD1
Epic Contributor
Are you able to access the installer settings/options or did your installer lock you out of that?
I am guessing there should be some setting in the installer pages, but cannot find any info for that online?
I am guessing there should be some setting in the installer pages, but cannot find any info for that online?
ultrarunner
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Brothers 1949 home or 2400 square feet had no central air or heat... just an old wall furnace and bedroom window box... several days at a time it can be over 100 and in the 90's for longer periods of time.
I went undersize due to only having 30 amps available... the entire 14 years until he sold he was the envy of his neighbors... we did spend extra installing the best ducts and making sure all was properly sealed... enen commercial metal ducts with add insulation in areas that would not be later accessible.. variable blower, 3 stage gas heat and oversize returns..
Very happy with that job and put the extra money into doing a first class install... he also planted a nice summer shade tree and we insulated and replaced all the windows...
His friend that sold us the unit said he could not put in a undersized unit... simply could not... now he will reference us on sales calls saying he has one customer that went undersized without issue.
I went undersize due to only having 30 amps available... the entire 14 years until he sold he was the envy of his neighbors... we did spend extra installing the best ducts and making sure all was properly sealed... enen commercial metal ducts with add insulation in areas that would not be later accessible.. variable blower, 3 stage gas heat and oversize returns..
Very happy with that job and put the extra money into doing a first class install... he also planted a nice summer shade tree and we insulated and replaced all the windows...
His friend that sold us the unit said he could not put in a undersized unit... simply could not... now he will reference us on sales calls saying he has one customer that went undersized without issue.
kenmac
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I sold my business a while back so I'm no expert, but With your system having old equipment mated to newer equipment could be the issue. The old blower may be moving too much air across the newer A coil. The air flow may need to be adjusted at the old furnace / air handler. It's best to have a load calculation instead of guessing the size of the unit. Your unit shouldn't be short cycling . you are using energy ,and not removing humidity from your home. Short cycling isn't good for you or your unit. JMO..
OP
General Lee
Veteran Member
LD1- I can access the installer options. That is how I changed it from 5 cycles an hour to 3 . Last night when the load wasn't as great it seemed to cycle 3 times an hour.
Ok - some updates . Today is in the 90's and the unit is running longer periods of time BUT its only staying off for 5-6 minutes before coming back on.
I know I have insufficient return air. A second return was added a few years back right beside the blower motor. This helped quiet the air return upstairs as it was annoyingly loud. Now some techs are saying its bad for me to be drawing in so much basement air (basement is unfinished) which is affecting the efficiency of the unit. Some techs say the more air the better. Right now the basement return is partially blocked as the latest tech feels it would benefit the unit to draw in more upstairs living space air instead of alot of cooler basement air mixing in. It would allow the TXV to open up more and produce cooler air. Only thing now is the upstairs air return is slightly louder because its drawing harder.
Now what sparked my second call back to the company was, after the new replacement coil was installed we started the system and let it run. The house temp was about 77 degrees. We had a 22* temp split at the unit and 56.5* air coming out of my closest vent. I was very pleased. Now my Temp splits are 15-16* and I'm getting 59* air out of that same vent. I thought I had a problem because the numbers were falling.
They tell me when the unit has to work harder hence the 77* air in the house my temp splits will be greater. Once the house air stabilizes or the heat load is less, it is harder to get the big temp splits. IS this true? Kinda makes sense to me.
Ok - some updates . Today is in the 90's and the unit is running longer periods of time BUT its only staying off for 5-6 minutes before coming back on.
I know I have insufficient return air. A second return was added a few years back right beside the blower motor. This helped quiet the air return upstairs as it was annoyingly loud. Now some techs are saying its bad for me to be drawing in so much basement air (basement is unfinished) which is affecting the efficiency of the unit. Some techs say the more air the better. Right now the basement return is partially blocked as the latest tech feels it would benefit the unit to draw in more upstairs living space air instead of alot of cooler basement air mixing in. It would allow the TXV to open up more and produce cooler air. Only thing now is the upstairs air return is slightly louder because its drawing harder.
Now what sparked my second call back to the company was, after the new replacement coil was installed we started the system and let it run. The house temp was about 77 degrees. We had a 22* temp split at the unit and 56.5* air coming out of my closest vent. I was very pleased. Now my Temp splits are 15-16* and I'm getting 59* air out of that same vent. I thought I had a problem because the numbers were falling.
They tell me when the unit has to work harder hence the 77* air in the house my temp splits will be greater. Once the house air stabilizes or the heat load is less, it is harder to get the big temp splits. IS this true? Kinda makes sense to me.
A slower fan speed will result in a slower rate of change in air temp when the AC comes on. This will normally result in a longer run time. With a TXV valve the coil temp is maintained independent of load on the coil. Older orifice systems will have a range of delta temps as they deliver near full capacity when they run. TXV will automatically compensate.
paul
kenmac
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you should not be taking return air from any space, other than living space. I would never pull return air from a non living space just to get more return air... this isn't helping you 1 bit ! Your basement return is killing your efficiency .... This company should have fixed your return air problem B-4 installing a unit...
Didn't you say in another thread that you trusted this company ?
Didn't you say in another thread that you trusted this company ?
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LD1
Epic Contributor
I disagree about basement air.
The basement is the coolest place in my house. Hotter return air makes the unit work harder.
My basement isnt finished, but is occupied. Kits toy room, laundry, etc. ITs not uncommon for it to be 60 in the basement and 80 upstairs (prior to ac). When I really dont need any cooling.....rather I need blending of the air to make the whole house average out at 70.
I have a basement return, its open to pull all that cool air it desires and blow it upstairs.
As to the temp swings, the hotter the return air, the greater the swing....but that dont equate to efficiency.
And when you said "once the house stabilizes the heat loss will be less".....
Not sure what you mean by that. IF its 95 outside, heat loss will be less at 77 than it will at 72.
The greater the difference in temp between the house and outside....the greater the heat transfer. So the hotter the house is, the less BTU's get transferred to the outside, The farther the spread, the greater the transfer rate. So keeping the house cooler, equates to faster heat loss with the same outside temps.
The basement is the coolest place in my house. Hotter return air makes the unit work harder.
My basement isnt finished, but is occupied. Kits toy room, laundry, etc. ITs not uncommon for it to be 60 in the basement and 80 upstairs (prior to ac). When I really dont need any cooling.....rather I need blending of the air to make the whole house average out at 70.
I have a basement return, its open to pull all that cool air it desires and blow it upstairs.
As to the temp swings, the hotter the return air, the greater the swing....but that dont equate to efficiency.
And when you said "once the house stabilizes the heat loss will be less".....
Not sure what you mean by that. IF its 95 outside, heat loss will be less at 77 than it will at 72.
The greater the difference in temp between the house and outside....the greater the heat transfer. So the hotter the house is, the less BTU's get transferred to the outside, The farther the spread, the greater the transfer rate. So keeping the house cooler, equates to faster heat loss with the same outside temps.
Check Page 5 of your owners manual. There is a CIRC (circulate) mode for the FAN. Is it possible that it is just the fan coming on and not the whole system?
