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Posted by Jason on December 12, 2006, 8:01 pm
Bubba wrote:
>
> >I had a new Trane system installed recently in my home. It is an xl14i
> >heat pump and xv90 gas furnace. When the heat turns on, there is a 1
> >second rumble/vibration somewhere in the furnace, and about a 2 second
> >rumble when the system shuts down. I've had the installer out 3 times
> >and they can never fix it. Seems like they make it quieter, but in a
> >couple days it's back. The furnace is in the garage and backs to one
> >of the walls of our primary living area, so it is rather annoying to
> >hear the thing rumble on and off. Has anyone else had similar issues?
> >I don't want to pay > $10K for this new system, which is supposed to be
> >so quiet I won't even know it's on (yeah, right).
>
> Too late. It looks like you already paid the 10K. Get another Trane
> dealer if that one cant find or fix the problem.
> >
> >Also, I have some issues with the system heating the house in the
> >morning. I have a 2500 sq ft home, 2 floors. The thermostat is
> >upstairs. On a typical morning, 45 degrees outside, house is at around
> >65. At 7am I have it programmed to heat to 70. I have the adaptive
> >intelligence thing turned off.
>
> That's kinda stupid of you. Its built into the stat for a reason. So
> you dont have to guess how long it will take for your system to heat
> up your home. Its also smart enough to know whether it can heat your
> home with the heat pump only or if it needs to use the gas furnace to
> accomplish this. All this thinking is done for you if you'd just turn
> the damn adaptive intelligent recovery option on.
>
The installers turned it OFF by default. They said they always turn it
off because it doesn't work very well. I turned it on myself to see
for myself, and when the system started turning on at 3:30 in the
morning, and still failing to heat the house to 70 by 7am, I turned it
back off.
> >First thing it does is start up the
> >heat pump. After a minute or so it switches over to gas, then it
> >cycles back and forth between heat pump/gas, and it ends up taking
> >about 2 hours or longer to heat the house up 5 degrees to 70. I went
> >into the programming of the thermostat and changed one option to make
> >the recovery ramp more aggressive, and it seemed to help some, keeping
> >the gas heat on longer, but it still cycles back and forth. I would
> >figure the system would be smart enough to immediately go to gas, ramp
> >up quickly as possible to 70, then switch to heat pump for the rest..
> >Is that too much to ask for? Is there any way I can program this
> >better?
>
> Read above comment. You turned that feature off,
> remember.....Einstein?
As I mentioned above, turning on adaptive recovery does not do anything
near what I describe in this paragraph. I don't want the heat pump
running at 3 in the morning. It is loud and I don't want it waking me
or my neighbors up. When I described the cycling to the installers,
they didn't have a clue what to do.
> >
> >One more thing, how do I know if the second stage heat is actually
> >working? Should I hear the furnace speed up or feel more air coming
> >out of the registers? Does second stage heat system work with both the
> >heat pump and gas, or just when the gas is running?
> >Thanks for any help
> >Jason
>
> 1st stage is heat pump
> 2nd stage is low fire gas heat
> 3rd stage is high fire gas heat
> High heat will ramp up the blower speed
> You need to have someone come out and re-check/change all the settings
> to where they belong. You should pay him since you've been in there
> "mucking" around with that which you shouldnt have.
So is this then considered a 3H/1C system? Does the thermostat handle
the low/high gas or is it all done independently?
I only changed the adaptive intelligence on/off and the recovery ramp,
measuring how each behaved independently to gauge how it effects the
system. I didn't "muck" with all the settings haphazardly.
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