30
Preparing and inspecting the roof
Check the roof for the following:
•
roof does not leak or need repairs;
there are no plans to refurbish the
roof in the immediate future
•
roof design load
The way the mounting racks are fas-
tened depends on the roof's design
load rating. In some cases this may
require that a structural engineer cal-
culate the requirements, taking into
consideration the relevant snow and
wind loads.
•
However, for this type of mounting,
the wind loads are very low
(evacuated tube collectors installed
lying down have almost no surface
area to catch the wind). As a result,
standard concrete paving stones
measuring approximately 45 cm
square and 5 cm thick are adequate.
The individual stones shall weigh at
least 20 kg. The roof must be capable
of supporting an additional load of
about 50 kg/m². Use construction
protection mats to protect the roof
covering.
Determine fastening points
taking into consideration the
following:
•
The collector panel should be orient-
ed toward the south; i.e., so that the
tube axis is east-west.
•
The collector panel should not be
shaded at any time.
•
The interconnecting piping should be
kept as short as possible and be rout-
ed directly to the pump assembly and
heat storage tank.
•
In order to minimize wind load
(suction force), panels should not be
installed directly at the edge of the
roof. Minimum clearance: 1.2 m;
More for higher buildings and ex-
posed locations.
•
The distance between the fastening
points is individually calculated taking
into consideration the length of the
manifold
(AURON 15 = 138 cm)
(AURON 20 = 184 cm) and the posi-
tion of the interconnecting plates be-
tween the manifolds and the bottom
rails. Note that a brace cannot be
positioned where the interconnecting
plate is located
F = 12 cm
Do not exceed the following
dimensions:
projection E: 7 to 25 cm
and
maximum distance between sup-
ports A
= 140 cm.
The total distance between the sup-
ports:
B = 194 to 160 cm
(see pages 21 and 22)
•
The mounting rails may also be bolt-
ed to girders that transmit the load to
walls capable of supporting the total
weight.
•
Concrete paving stones, bolts and
anchors for attaching the mounting
rails are not included in the scope of
supply and shall be supplied at site by
others.
Installing the mounting rack
Flat roof type E: Outdoor / flat roof assembly using mounting
rack with no adjustable angle of inclination.
F
south
D
E
A
B
Basic module with expansion module E 15
south
D
E
A
B
F
Basic module with expansion module E 20
Collector panel length (D):
The total length of the collector panel is
the sum of the lengths of the individual
manifolds.
Length of AURON 15 DF manifold:
138 cm
Length of AURON 20 DF manifold:
184 cm
