U 1521

Evacuated tube collector without CPC-reflector – 21 evacuated tubes
for water heating, series connection

  • Pipe material: Copper

    Scope of delivery: Fully pre-assembled unit comprising

    •  Evacuated tubes based on the thermos flask principle
    • Manifold with direct flow heat conduction unit and dry tube connection

    Collectors are packed in individual boxes. In addition, there is a sun protection sheet over the evacuated tubes.

    Installation types:

    • On-roof installation
    • Flat roof
    • Horizontal installation
Series   U1521
No. of Evacuated Tubes   21
η (Aperture), DIN 4757-4 or EN 12975 % 74.5
c1 with wind, in relation to aperture W/(m²k) 2.007
c2 with wind, in relation to aperture W/(m²k²) 0.005
Yield forecast kWh/m²a 780
(location Würzburg, Germany, reference area 3m²)    
Yield forecast kWh/m²a 619
(location Würzburg, Germany, reference area 5m²)    
Grid dimensions (length x height x depth) m 1.45 x 1.64 x 0.1
Gross surface area 2.32
Aperture area 1.33
Collector contents l 2.5
Weight kg 51
Max. working overpressure bar 10
Max. stagnation temperature °C 220
Connection diameter, clamping ring mm 15
Sensor sleeve mm 6
Collector material   AI / Cu / glass / Silicone / PBT / EPDM / TE
Glass tube material   Borosilicate glass 3.3
Selective absorber coating material   Aluminium nitride
Glass tube (Ø ext./Ø int./wall thckn./tube lgth.) mm 47/37/1.6/1500
Colour (aluminium frame profile, anodised)   Aluminium grey
Colour (plastic parts)   Black
Thermal shock test ITW test 17COL1382Q