2
Product information
SKR6.1R, SKR12.1R - Subject to technical modifications.
5
2.2
Correct usage
The collectors are designed as the heat source for DHW
heating and central heating backup.
B
Only operate these collectors in conjunction with
suitable solar controllers and in fail-safe sealed
unvented solar thermal systems.
These systems must be equipped with a suitable,
adequately sized expansion vessel.
Permissible roof pitch
The self-cleaning effect for the glass tubes and CPC
mirror will only work if the roof has a pitch of at least 15°.
The maximum roof pitch is 65°.
Permissible loads
The installation set is suitable for the following:
• a standard snow load of 1.5 kN/m
2
or 2.0 kN/m
2
(
Æ
• wind speeds of max. 129 km/h (corresponds to a
stagnation pressure of 0.8 kN/m
2
)
B
Find out about the local standard snow loads.
B
To determine the maximum wind speed, take into
account the following factors:
– the location of the solar thermal system
– the geographic height [above seal level]
– the topography
– the building height
If necessary, consult a building structural engineer.
Heat transfer medium
To protect the collectors against damage through frost
and corrosion, operate them with LS solar heat transfer
medium. This must never be mixed with other fluids.
Other applicable instructions and important notes
The installation and maintenance instructions for the solar
pump station include vital information regarding the use of
collectors in a solar thermal system. Observe particularly
the information on the following subjects:
• Never braze pipework near the collectors.
• If system is used for central heating backup or covers
more than 60 % of the DHW demand, install a pre-
cooling vessel upstream of the expansion vessel.
• Install the expansion vessel (EV) with a tee 20-30 cm
above the solar pump station in the return (
Æ
Fig. 3).
• Flush and fill the system with LS solar heat transfer
fluid, by using a filling pump (never use water, as the
collectors cannot be drained). Consequently, there is
no need for an air vent above the roof.
• The following values in the installation and
maintenance instructions of the solar pump station
refer to flat-plate collectors:
– the pre-charge pressure to be set for the expansion
vessel
– the operating pressure to be set
– the flow rate to be set
Apart from the information in the solar pump station
instructions, observe the following:
• The distance between the solar pump station
(expansion vessel connection) and the bottom edge of
the collector array must be at least 2 m (
Æ
Fig. 3).
• The minimum pipe length (straight length) between the
solar pump station (expansion vessel connection) and
the collector array must be at least 10 m.
Fig. 3
Minimum clearances
2.3
EU Declaration of Conformity
This product conforms in design and operation to the
European Directives and the supplementary national
requirements. Its conformity is demonstrated by the CE
designation.
The Declaration of Conformity can be requested from the
manufacturer (see the back cover for the address).
For the values applicable to vacuum tube
collectors, see the chapter "Final steps"
(
Æ
page 28) in these instructions.
20-30 cm
> 200 cm
6 720 647 042-14.1ITL
