Air-To-Water Heat Pump: Wiring & Controls
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- เผยแพร่เมื่อ 4 ส.ค. 2024
- Power and control wiring for our new Arctic air-to-water heat pump system with HBX ECO-0600 controller
0:00 Outdoor Wiring
10:26 Indoor Wiring
25:25 HBX Controller Troubleshooting and Setup - แนวปฏิบัติและการใช้ชีวิต
Amazing! Certainly above my understanding!
Thank you!
Awesome job! My big question with Arctic's method of utilizing the HBX as an outdoor reset controller is that it seems to negate the variable speed benefits of the heat pump control. Variable speed algorithms usually rely on the delta to the setpoint to ramp up and ramp down capacity control. Since you are effectively making the programmed setpoint higher than the desired outdoor reset setpoint, it is not possible for the heat pump to try and load match to maintain your setpoint, thus it will tend to run at a capacity higher than required, overshoot the desired setpoint, and then HBX control will shut the heat pump down. Its a shame Arctic couldn't figure out something with their supplier to implement outdoor reset in their native controller, but oh well, its better to have outdoor reset control, and if you are running a buffer tank, the HBX style control is essential for allowing the off cycle to last long enough for the buffer tank to release the stored energy. In my unit, the temperature of the loop is read inside the monobloc unit and when the heat pump circulator turns off, the heat pump no longer knows the temperature in the buffer tank. It guesses wrong and turns back on again too soon. The temperature sensor on the long cable from the heat pump is meant to go into a domestic hot water tank, so I don't think its doing any good going in your buffer tank. Are you using a domestic hot water diverter valve in your setup, I didn't see one. I'm interested to see the data from your logger, that looks like a cool setup. How are you estimating or measuring the flow rate in order to calculate heat output? Nice work!
I have been thinking about that issue with the HBX controller myself. I have about a year of power data (both cooling and heating) so I'm thinking I might disconnect the HBX controller and let the Arctic controller do its thing. I am interested to see the energy usage comparison between the two.
I am not using the heat pump for domestic hot water right now. I may install a heat exchanger as another zone off my buffer tank and use that to preheat my cold water before it goes into my boiler, but that would only really be beneficial in the winter when I'm in heating mode. Not sure if its worth the expense to set that up.
I have not had time to actually get the temp data working in the logger, but I am collecting power data. I'll do a video on that at some point soon, especially if I can get the temp working. I'm estimating the flow rate through the heat pump using the pressure vs flow curve supplied by Arctic and the analog pressure/temperature gauges in my plumbing. HBX sells an energy meter to measure flow, pressure, and temperature and output BTU's, it would be awesome but its pretty pricey.
Thanks for watching!!
Sounds good, I think the HBX control will be better, it's more important to keep your flow temperature low than it is to load match, also the control does not know the buffer tank temperature so it will cycle too often. Anyway give it a try and I'd like to hear how it goes! My heat pump is doing all the DHW, boiler is not needed, feels good.
Nice job. I was thinking of putting the pump power from the heat pump in the second conduit but it works there. It seems the Eco 600 is a bit of overkill... vs Eco 400. Or did you have a reason? The extra temp and power consumption monitors are super cool and you can dork out on data later Im sure. These projects are like a 2000pc puzzle!
I did not buy the HBX controller though Arctic, I got that separately. The eco-0600 is the current version, it has more features than I need right now but I may need a second heat pump in the future for full capacity of my house so the staging controls will be super helpful
The power monitors have been great in order to estimate the operating cost. Unfortunately I haven't had time to figure out the temp properly yet. I'm a mechanical test engineer by day, geeking out with data is what I love lol