If your going to run in 1st stage all the time, have someone verify operation with combustion analyzer to make sure your flue gases are hot enough and they wont condense before leaving exhaust pipe, which would eat away the flue pipe and heat exchanger.
Thanks. I'll call our HVAC company one day to take a look at that.
54regcab.....I guess it helps if I look at his location.
Yea it will take a while to rust out. It should still be properly tuned.
We have bigger fish to fry than combustion analysis. Down south we're simply trying to get the ductwork installed right for decent airflow It isn't uncommon for units down here to be riding the high limit switch...
The sad part is most customers don't even realize it. The system can operate that way for years before it cracks the heat exchanger, especially on systems that don't do a "lockdown" when it hits limit.
Is it true that it does not need a w2 wire? I thought that all thermostats compatible with 2 stage heat must use a w2 wire to control 2nd stage.
The way the IAQ works is it has 3 wires going to the thermostat from the EIM (interface module mounted near the furnace). The EIM is then wired to the furnace as most thermostats would be. It's a great thermostat and can be set up to control dehumidification in the summer. I agree with the suggestion to look into having one installed.
Im glad I switched to commercial. Airflow seems to be better on this side.
Depends on the landlord/building you work on. I've seen some junk out there in commercial. Granted, it does seem more common in residential. We do 80% residential, and most of our commercial jobs are businesses that have 4 units or less. I certainly am NOT fond of working on rooftop units during freezing weather, but then again package units aren't much more fun.