vendredi 20 février 2015

Heat Pump and Supplimental Heat

I have a house that has 2 heat pumps, one for upstairs and one for down stairs. This past summer we had the whole upstairs system replace with a high efficiency unit. During this cold snap, it is running beautifully.



The downstairs unit is a 14 years old, 8 seer unit. This past week it has struggled to keep up with the cold weather. While our temperatures last night pale in comparison to other parts of the country, our buildings are not as well equipped to handle such low temperatures (5 degrees). Came down this morning and it was in the 60's down, while a toasty 70 upstairs. I have been monitoring the temps coming out of the vents downstairs at 72 degrees. Nudged up the thermostat early to no avail. I just went over and switched it to supplemental heat and suddenly, I get 100 degrees coming out of the register and the house is heating back up fast. Usual temp out of the register in my office is 80 degrees.



Isn't the thermostat supposed to automatically call for emergency heat if demand can not be met from normal operations. In the past, if we needed it a little more hot, as soon as you pushed the thermostat up, the emergency heat light would come on. I'm thinking the thermostat is wired wrong.



When the new unit was installed this summer, the assistant tech installed the new thermostat in the downstairs hallway instead of upstairs hallway. He had to remove, switch and re-install the old one downstairs. Can it be wired incorrectly that it doesn't call for emerg. heat?

Heat Pump and Supplimental Heat

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