02
FPW Collector Installation Manual
Technical Specifications
Specification / Type
FPW18
FPW21
FPW25
Dimensions (mm)
1929 x 933 x 91
1988 x 1041 x 90
1990 x 1222 x 91
Casing Material
Electrostatically Painted (Black) Aluminium Case
Weight (kg)
34
37.2
44
Sealing Material
EPDM & Silicone & Aluminium Frame
Gross Area (m²)
1.79
2.07
2.42
Aperture Area (m²)*
1.62
1.92
2.23
Absorber Area (m²)
1.59
1.89
2.23
Absorber Material
Almeco Tinox Highly Selective Aluminium
Absorptance (%)
95
95
95
Emittance (%)
4
4
4
Welding Method
Laser Welding
Heat Carrier Volume (ltr)
1
1.07
1.27
Number of Riser Tubes
9
10
12
Tube pitch (mm)
110
110
110
Glass Material
Low Iron Tempered Glass
Transmittance of Glass
91%
91%
91%
Thickness of Glass (mm)
4
4
4
Insulation Material
Rockwool
Thickness of wool (mm)
50
50
50
Base Sheeting
Embossed Aluminium Sheet
Max. Operating Pressure
10 bar
Max. Collectors in Series
8
Efficiency
eta 0 (zero loss efficiency - n0a)*
0.785
a
1
(W/m²K) (1st heat loss coefficient)*
3.722
a
2
(W/m²K²) (2nd heat loss coefficient)*
0.012
Stagnation Temperature at 1000 W/m and 30˚C
203
°
C
IAM (50
°
)*
0.94
η
cal
(40K, 1000W/ m2)*
0.617
* for energy labelling
