Material of solar collector :  

Non pressure solar collector

Material of product

Outer tank : Al-Zn coated steel sheet

Inner tank : SUS304-2B stainless steel sheet

Insulation : polyurethane foam

Vacuum tubes : borosilicate glass 3.3

Absorption coating : AL-N-AL

Stand : Aluminum alloy / galvanized sheet 

Model	Vacuum Tubes	Aperture	Manifold Volume	40 GP loading QTY	20 GP loading QTY
	(D×L×N)	( m2)	(L)
Q-B-J-1-54-2.30/0	58×1800×18	2.3	54	161	69
Q-B-J-1-60/2.60/0	58×1800×20	2.6	60	149	63
Q-B-J-1-78/3.38/0	58×1800×26	3.38	78	124	54
Q-B-J-1-90/3.90/0	58×1800×30	3.9	90	112	45

*This model got solar keymark from Germany TUV

Principles and characteristics:

Auto charging water : Charging water by solenoid valve. When reach the setting time and setting water level ,the solenoid valve will start to charge water till the tank is full of water

Temperature difference circulation: When solar collector temperature is 10^oC higher than tank temperature ,circulation pump P1 will start to inject cold water from tank to the collectors ,so hot water in the collectors will go to the tank ,When temperature difference is lower than 3^oC circulation pump will stop .

Anti-freezing  circulation : When circulation pipe temperature is lower than setting data ,temperature difference pump will start to inject hot water from tank to the circulation pipe, When the circulation pipe temperature is higher than setting data ,the pump will stop .

Electrical heater assistant : When water temperature in the tank is below the setting data at the setting time the electrical heater will start to heat water till reach the setting data .

Pipe circulation : When outlet pipe temperature is lower than setting data ,pipe circulation pump P2 will start to inject hot water of the tank into the tank ,make sure that when you open the water tap you will have hot water .