Hello, I'm hoping to learn something about my system and how it should be set up for best results. I live in SW Virginia, it hits 90 in the summer and usually dips under 20 in the winter. Sometimes it gets to zero, but not every year. I'd say the average winter lows are around 25-30 degrees.
Background: 3 years ago I replaced my old Carrier system with a 23HCP6 2-stage unit with a FV4C variable speed fan coil. I was sold the 2-stage because of supposed efficiency improvements and told that my old thermostat (Carrier A98426) would work just fine with the new components.
Recently the stat had started to act up, the temperature would increase for no apparent reason during cooling. Obviously an unstable situation. So I bought an Ecobee and hooked it up. Pretty simple except that it didn't cool. Thought it was some kind of Carrier weirdness, but closer inspection of the old stat showed that it was set for a single stage HP (via dip switch) and "Intelligent Heat Staging". With this heat staging a jumper is removed on the fan coil (verified) and the electric heat elements are controlled independently. You wind up with 3 stages of electric heat, W1 by itself, W2 by itself (must be larger), and W1 + W2.
Is this better than setting up the system as a 2-stage HP with electric aux mode?
Background: 3 years ago I replaced my old Carrier system with a 23HCP6 2-stage unit with a FV4C variable speed fan coil. I was sold the 2-stage because of supposed efficiency improvements and told that my old thermostat (Carrier A98426) would work just fine with the new components.
Recently the stat had started to act up, the temperature would increase for no apparent reason during cooling. Obviously an unstable situation. So I bought an Ecobee and hooked it up. Pretty simple except that it didn't cool. Thought it was some kind of Carrier weirdness, but closer inspection of the old stat showed that it was set for a single stage HP (via dip switch) and "Intelligent Heat Staging". With this heat staging a jumper is removed on the fan coil (verified) and the electric heat elements are controlled independently. You wind up with 3 stages of electric heat, W1 by itself, W2 by itself (must be larger), and W1 + W2.
Is this better than setting up the system as a 2-stage HP with electric aux mode?
source https://hvac-talk.com/vbb/threads/2242255-Carrier-2-stage-HP-and-quot-Intelligent-Heat-Staging-quot?goto=newpost
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