Appendix
40
Installation and maintenance instructions auroTHERM exclusive 0020077989_04
C
Technical data
Technical data
VTK 570/2
VTK 1140/2
Number of tubes
6
12
η₀
(aperture), DIN4757-4 or EN12975
55.5 %
56 %
c
₁
with wind, with reference to gross area
0.646 W/(m
²
k)
0.651 W/(m
²
k)
c
₂
with wind, with reference to gross area
0.004 W/(m
²
k
²
)
0.004 W/(m
²
k
²
)
K
θ
,trans
(50°), with reference to gross area
0.98
0.98
K
θ
,long
(50°), with reference to gross area
0.95
0.95
Annual collector yield (example: Würzburg, 50°)
664 kWh/collector
1330 kWh/collector
Peak output per collector module W
peak
644 W
1,288 W
Area-related heat capacity c
7.91 kJ/(m
²
k)
7.98 kJ/(m
²
k)
Volume flow (per m
²
of collector surface)
24 I/(m
²
h)
24 I/(m
²
h)
Minimum volume flow in the solar circuit
180 l/h
180 l/h
Absolute pressure in the high vacuum
10
-5
mbar (= 10
-8
bar)
10
-5
mbar (= 10
-8
bar)
Alpha absorber absorption
≤
94%
≤
94%
Epsilon absorber absorption
≤
6%
≤
6%
Grid dimensions (length x height x depth) in m
0.7 x 1.65 x 0.11
1.39 x 1.65 x 0.11
Gross area
1.16 m
²
2.30 m
²
Aperture surface area
1.0 m
²
2.0 m
²
Absorber surface area
1.0 m
²
2.0 m
²
Collector capacity
0.9 l
1.6 l
Weight
19 kg
34 kg
Operating excess pressure, max. permissible
10 bar
10 bar
Shutdown temperature, max.
301
℃
301
℃
Connection width, flow/return
15 mm
15 mm
Material for the tube collector
Al/1.4301/glass/silicone/PBT/EPDM/TE
Al/1.4301/glass/silicone/PBT/EPDM/TE
Material for glass tubes
Borosilicate 3.3
Borosilicate 3.3
Absorber layer
Highly selective
Highly selective
Glass tubes (outer diameter/inner diameter/wall
thickness/tube length)
47 / 33 / 1.6 / 1503
47 / 33 / 1.6 / 1503
Colour (plastic parts)
Black
Black
Certification in accordance with the Pressure Equipment
Directive
TÜV SÜD certificate no.: Z-IS-
AN1-STG-S-18-08-2645213-
29080643
TÜV SÜD certificate no.: Z-IS-
AN1-STG-S-18-08-2645213-
29080643
Max. wind load
2400
2400
Max. standard snow load
3350
3350
On-roof installation angle
15 … 75°
15 … 75°
Flat roof installation angle
30°, 45°, 60°
30°, 45°, 60°
