Originally Posted By: Blaine Wiley This post was automatically imported from our archived forum.
Well, I failed because of my study guide, a York Tech-sheet, and other various sources.
From the HVAC section of Real Estate Home Inspection:
"On most furnaces, the limit control is calibrated to shut off the burner if discharged air temperature reaches or exceeds 200 degrees F".
I guess this is just one more instance of why there is such disparity in home inspectors interpretation of how it should be....Now, how is that outlet supposed to be wired again ![nachi_sarcasm.gif](upload://6HQh6KbNiD73gqTNQInjrR2zeJw.gif)
Originally Posted By: dedwards This post was automatically imported from our archived forum.
My source says the high limit to be 250 in most states (code requirements) My source is the textbook we used when I went thru HVAC school a couple of years ago. The figure 150 sounds way too low for an “upper” limit setting. It gets 150 degrees almost immediately. I am on the way out the door to go to work but as soon as I can I will scan the text and illustration out of the book and if I can “break the code” for scanning and sending it I will post it here. It’s a brand new scanner w/ software and I am still on the learning curve on how to use it.
Originally Posted By: gbeaumont This post was automatically imported from our archived forum.
hi to all,
Kevin, no I think #1 would have to be wrong, think about it if the temp limit was set that low then the furnace would be short cycling like crazy and never produce enough heat to raise the temp to the room thermostat presets. Unless of course some one knows different ![icon_confused.gif](upload://qv5zppiN69qCk2Y6JzaFYhrff8S.gif)
Originally Posted By: dvalley This post was automatically imported from our archived forum.
This can be raised as high as 210 degrees F., if needed in severe weather.
For heating systems with coils to heat domestic hot water, high limit setting of 210 degrees F. with low limit setting of 190 degrees F. and differential setting of 15 is recommended for optimum amount of domestic hot water.