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Old 11-03-18, 12:52 PM   #1
Lurking Renovator
Join Date: Sep 2018
Location: Serbia
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Default Home made air source heat pump

Hi for everyone!
I am from Europe. From Serbia.
I'm working on project to heat the house with two 18000btu split ac outdoor unit.
I don't use the indoors. I have a copper tube heat exchanger. The diameter of tube is 8mm and a lenght is 28m. I have two of these for each outdoor unit in a tank of 125 litres.
Metering devices are original cap tubes in outside units.
With my friend we doing this project. He has tools and practice for brazing, and vacuuming, filling refrigerant. We use the original refrigerant for units (R22).
The heating is working. I will add some pictures here.
I have only one service valve on the outside unit. Now i measure here the pressure of liquid line (high side).
I have temperature meters on middle of outside heat exchanger(saturation temp), on suction line of the compressor, on the copper tube before goes in tank (condenser in) and after the tank (condenser out).
In the outside units i have 4 way valves. Now i heating with underfloor heating and 3 fan coil unit. I want to use the system for cooling at summer (with fan coils).

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Last edited by Daox; 12-10-18 at 12:11 PM..
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