ReplyHe doesn't he loses money when he has to change it to a smaller one. He sized by the previous equipment size, and lost.Originally Posted by big windy
God Speed, Jim. We'll miss you - 2-26-23
Why wait till thursday, she can do it this morning when they get there.
Professional Member
He doesn't he loses money when he has to change it to a smaller one. He sized by the previous equipment size, and lost.
You can't fix stupid
Professional Member
oh yeah.....your right.Why wait till thursday, she can do it this morning when they get there.
Have them there first thing TODAY.
Actually, I can see the call to the on-call tech right now. You wanna explain why my 12 hour old system is already FREAKIN OUT????? hahaha that would be entertaining.
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If you don't know, then don't do. If you don't know and still do, then be prepared to pay someone else a lot to undo what you did and then do it right.
If you do know, then do. But do it right. Otherwise, you may not be doing it long.
Regular Guest
Why not just heat the uninsulated garage and call it goodNo more oversize equipment !!!
Regular Guest
How did you know about the garage ? It is insulated , but can't put in returns , against code , negative pressure etc. . Ha Ha !
Professional Member*
Not knowing the age of the home and other info, I would almost want to bet you could get by with a 80,000 model.
Ask for a manual J, and if you want, you can down load a home owner's manual-J up above for $50.
All the stuff you got on there, sure hope they did a two stage t-stat???
Regular Guest
Honeywell Pro TH4000 series.
Professional Member*
Man, do you have a problem
First off, I think we can be safe in concluding your furnace is over size
second, you say the returns are two--14 x 8 and a 6" ???
a 120K BTU furnace will move 2000 cfm. On a furnace this big, I would install a MINIMUM of 10 x 24 in a bottom return or two 8 x 24, one on each side of the furnace. I think your return is inadequate.
NOW.....not all is lost. The TUY120R9V5V can handle a 3½ ton air conditioner. Increase your return air to, two 24 x 8 (24 x 10, if it will fit) and--->
check your dip switch's, I would set them up this way for 3½ tons of a/c~~~~~
1st stage heat, DIP SWITCH 7 & 8 to NORMAL. sw7---on, sw8---off. with a static pressure of 0.5 this should give you a fan speed of 1370 cfm with a delta T of 49° (for *HI* speed set them to sw7---off and sw8---off)
2nd stage heat, DIP SWITCH 7 & 8 to NORMAL. sw7---on, sw8---off
AIR FLOW SETTING FOR COOLING
DIP SWITCH 1 & 2 & 3 & 4 (set the fan speed to 350 cfm/ton)
sw1---off, sw2---on, sw3---off, sw4---on ~~~~~ with a static pressure of 0.5, these setting will give you 1220cfm.
If you set the dip switchs to 400cfm/ton the minimum fan speed you will get is 1400cfm
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Professional Member*
You have a heat pump on this set up?? This stat is for a heat pump, and if you have a heat pump, I'd ask for the Honeywell IAQ to get a MUCH better control of the heat pump, and stage the gas furnace.
But before you do that, we got to fix this "maybe oversized" furnace.
God Speed, Jim. We'll miss you - 2-26-23
TH4110 is a standard 1 heat one cool sat.
Professional Member*
I saw that after I posted, and there is the TH4210 that is for heat pump.
We don't know off hand of what model he may have.
Come to think of it, he may very well have the TH4110 being he said the furnace locks out after 10 min... The board is firing off 2nd stage around that time.
God Speed, Jim. We'll miss you - 2-26-23
Plus, I believe the 4210 can be used on fossil fuel fnaces. Like the 5220 can.
Professional Member*
With a heat pump as a back up, yes. Gas alone, no.
God Speed, Jim. We'll miss you - 2-26-23
Hmmm.
For some reason, I think your right. Now I got to go look.
You were right I was wrong.
Last edited by beenthere; 06-18-2008 at 10:11 AM. Reason: **&%^%**&
Regular Guest
So the thermostat may be wrong too ?
Professional Member*
Do you know the full model # you got? If you got the TH4110, it can be used. but it won't fire 2nd stage as needed, the timer on the board will do that, and lot of us don't like that..
But if it's TH4210, then it won't work, unless you have a heat pump set up with your furnace.
God Speed, Jim. We'll miss you - 2-26-23
Yea, 2 stage furnaces on timers don't have the ability to provide the comfort like a thermostat controlling it would give.
Regular Guest
Th4110d1007
God Speed, Jim. We'll miss you - 2-26-23
Single stage heat single stage cool. They are going to run the second stage off the furnace boards timer.
When did they say they will be back?
Regular Guest
Well after replacing the limit switch it still tripped , he also removed the ducting to prove to me it wasn't a restrictive venting issue . The service tech believes it is a burner issue . I spoke to the owner of the outfit he promises complete satisfaction , they are replacing the furnace and will re-evaluate the sizing . If I want a different thermostat (tech felt that the thermostat was a good one) , they will also get whatever I want (any recommendations?) It seems to be being handled as professionally possible . Except for possibly having the wrong size furnace. They will advise me on Monday the details . Trane is being called by the company.
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