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meljackmom

02:14PM | 01/22/04
Member Since: 01/21/04
3 lifetime posts
Bvhvac
We have purchased a brand new American Standard Comfort R 80 furnace. Our gas usage is up 30% over last year and our old Bryant!!

The air coming out of the registers feels only lukewarm. Because it is a 2 stage furnace, it spends 10 minutes on low stage then kicks in to high until thermostat is satisfied, then kicks off. In total, the furnace runs approximately 45 minutes per hour. Does anyone have experience on possible pitfalls of first setting up this furnace, or gas pressure issues that could cause this? (suggested by the distributor) or any other tidbits on fine tuning this sytem? The installer is of little help, and we can't afford this level of consumption!

plumber Tom

03:14PM | 01/22/04
Member Since: 05/10/03
801 lifetime posts
The gas pressure is not an issue here. The heating professional should have performed a heat loss calcualtion and determined the btu input from that. You may notice an initial increase from the 1st year of installation of the new unit. compared to: Bryant unit you had in place for many previous years. Lukewarm is normal. It's possible to adjust the run time of the blower on the circuit board, by removing the pin switch and placing it on a higher or lower run cycle. Consult with the installer. As Harold has mentioned in many previous posts a poor technician can take a good machine and make it run inefficiently if the installation was not appropriate. Was your existing ductwork changed in addition to the new American standard unit? Something sounds out-of -wack if your new unit runs that long!

meljackmom

04:00PM | 01/22/04
Member Since: 01/21/04
3 lifetime posts
thanks for your reply plumber Tom


Yes, the duct work was changed....increased main supply to allow for a bigger unit, dampers added so to control air, extra duct added to feed a room. We have great air flow, but the air coming out is under 100 degrees. (Is that normal(.

Any suggestions you have are appreciated. Probably time for an objective 3rd opinion?


plumber Tom

04:16PM | 01/22/04
Member Since: 05/10/03
801 lifetime posts
The only other thing I can suggest is to call the manufacturer and ask for tech support. Explain your situation to the person on the phone and ask about temperature rise. The support techs will be happy to bombard you with technicalities.

meljackmom

05:23PM | 01/22/04
Member Since: 01/21/04
3 lifetime posts
Thank you both for your replies. And yes our usage is up 30%....the bill is up 50%!

Will contact the manufacturer, and maybe need to slow down the blower speed til then.

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