Appendix
0020077989_04 auroTHERM exclusive Installation and maintenance instructions
39
Appendix
A
Inspection and maintenance work
The table below lists the manufacturer requirements with respect to minimum inspection and maintenance intervals. If na-
tional regulations and directives require shorter inspection and maintenance intervals, you should observe these instead of
the intervals listed.
#
Maintenance work
Interval
1
Purging the solar system
Four weeks after initial start-up
2
Check solar fluid
Annually
36
3
Checking the product for damage, dirt and leaks
Annually
36
4
Cleaning collectors
Annually
36
5
Checking brackets and collector components for firm seating
Annually
37
6
Checking the pipe insulation for damage
Annually
37
B
Efficiency and pressure loss
60
50
40
30
20
10
0
10
20
30
40
50
60
70
80 A
B
1
A
Efficiency [%]
B
Temperature difference
ΔΤ
(T
collector
− Τ
ambient air
) [K]
1
VTK 570/2 / VTK 1140/2
150
50
100
0
1
2
3
4
5
6
7
8
A
B
2
1
A
Mass flow Q [l/min]
B
Pressure loss
Δ
p [mbar]
1
VTK 570/2
2
VTK 1140/2
