Leak Check Solar Cycle Loop

Working towards finishing the solar cycle loop components and cooper pipes we begin testing for leaks BEFORE we add the coolant/refrigerant. Don't forget a few things we did.

Dry Pressure Test Solar pipes: Here we add a small pressure guage and shradder valve to add compressed air to see if our pipes and parts installed as far areDry Pressure Test Solar pipes: Here we add a small pressure guage and shradder valve to add compressed air to see if our pipes and parts installed as far areSolar Leak Check: Using the pressure test and dish soapy water and watch for any bubblesSolar Leak Check: Using the pressure test and dish soapy water and watch for any bubblesPressure check with air: Addin air to the solar loop to see if pressure will hold. If pressure will hold then we have no leaks.Pressure check with air: Addin air to the solar loop to see if pressure will hold. If pressure will hold then we have no leaks.Solar Air Purge Valve: Here we have attached the air purge valve to some fittings to be attached to the incoming side to the solar collector.Solar Air Purge Valve: Here we have attached the air purge valve to some fittings to be attached to the incoming side to the solar collector.

One there is a one way valve above the pump. So if you are adding air above the valve and think you have tested the components below the valve you have not. I was showing someone how I tested the system's workstation before I had the collector connected. I opened up a valve below the one way valve to release the 60 psi and no air came out.?
You can pressure test the system without a special test apparatus by adding air through a ball valve and once the air is up to the test pressure, shut the valve, hold in the air and see it the system will hold that psi overnight.
Use soapy water sprayed on all the joints etc to find a leak with bubbles. We had one at a union coupling.
When testing the integrity of the completed loop we found it would not hold pressure. On top of the collector we had added the air purge valve. Well it was working purging the air. So we removed the valve and temporarily plugged its fitting, and pressurized the system with 60 psi of air overnight.