Im not sure you are correct in that VRF/variable speed systems dehumidify better. The coil temps change when the speed changes. It is not condensating at the same rate as when running 100%.
@HVACKnowItAll But coil temp is also a metric of dehumidification. How far below the dew point. Ive seen where VRF has not been best at dehum and it is a bit of its reputation despite how great the systems are. It is lesser of an issue when the building envelope is sealed well.
I have a question for Joshua. I have an American Standard Platinum 18 heat pump... very similar if not identical to the variable speed Trane 18XV model. The air handler is a TAM9 equipped with 10kW of heat strips for auxiliary and emergency heat. I have been monitoring the kW utilization with an Emporia energy monitoring system to determine the total draw in kW for the HVAC system and the house. I'm doing this to determine how much power would be required for a whole-house generator system. The Emporia allows me to look at the draw (watts) from the heat pump and the air handler by the minute. These data show that the heat pump has short bursts of watts about every 20 minutes or so that last for about 10 minutes. These "pulse peaks" seem to occur regardless of temperature or whether the compressor is running (broad peaks of energy use). I wish I could include a graph! Anyway, what are these pulses, and do they have anything to do with the speed control of the compressor.
Very informative video 👍👍👍 thank you
Thank you
Great content, very informative. Did you happen to get the diagram for vapor injection?
Im not sure you are correct in that VRF/variable speed systems dehumidify better. The coil temps change when the speed changes. It is not condensating at the same rate as when running 100%.
Slowly down compressor speed makes longer run times longer times equals better humidity control.
@HVACKnowItAll But coil temp is also a metric of dehumidification. How far below the dew point. Ive seen where VRF has not been best at dehum and it is a bit of its reputation despite how great the systems are. It is lesser of an issue when the building envelope is sealed well.
I have a question for Joshua. I have an American Standard Platinum 18 heat pump... very similar if not identical to the variable speed Trane 18XV model. The air handler is a TAM9 equipped with 10kW of heat strips for auxiliary and emergency heat. I have been monitoring the kW utilization with an Emporia energy monitoring system to determine the total draw in kW for the HVAC system and the house. I'm doing this to determine how much power would be required for a whole-house generator system. The Emporia allows me to look at the draw (watts) from the heat pump and the air handler by the minute. These data show that the heat pump has short bursts of watts about every 20 minutes or so that last for about 10 minutes. These "pulse peaks" seem to occur regardless of temperature or whether the compressor is running (broad peaks of energy use). I wish I could include a graph! Anyway, what are these pulses, and do they have anything to do with the speed control of the compressor.