Hydraulic Connection Of The Flat Solar Panel (Non-Pressurised System) - Daikin EKSV21P Installation Manual

3 x Installation

3.4.5 Hydraulic connection of the flat solar panel (non-pressurised system)

If the connecting pipe of CON 15, or CON 20 is not long enough for the distance between the hot water storage tank and solar
panel array, it can be lengthened, whereby the number of solar panels must be taken into account.
Pipe extension kits CON X 25 (2.5 m), CON X 50 (5 m), and CON X 100 (10 m) are available.
• Take account of the instructions concerning lengths of pipe in tab. 3-1, page 17.
Instructions on pipe installation
• Run the connecting pipe with a continuous gradient between the flat solar panels and the storage cylinder.
• Connect the solar panel array alternately, and align it so that the bottom return flow coupling is located at the lowest point
of the solar panel array (installation concepts 3.2, page 16).
Installation instructions
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CAUTION!
Siphon action may never be allowed to occur anywhere in the pipe run between storage tank and the flat solar
panel. This could lead to functional faults and even material damage.
In the case of longer horizontal pipe runs with only a minimum gradient, it is possible for water pockets to
develop due to thermal expansion of the plastic pipes between the mounting points with siphon action:
• Always make sure that pipe runs have a continuous gradient of at least 2 %.
• Fix the pipes in the optional support troughs TS (see page 12) or run them along a rigid auxiliary structure
(e.g. profile rail, pipe etc.).
• DAIKIN recommends always using the support trough kits (TS) for extended horizontal pipe sections.
The differences between the connection points and dimensions of the inflow connection pipe (at the top of the
flat solar panel / VA 15 Solar) and the return flow connection pipe (at the bottom of the flat solar panel /
VA 18 Solar) make it impossible to confuse one pipe for the other.
• However, you must ensure that the inflow and return flow pipes on the flat solar panel are labelled as heat
generators.
This instruction manual only describes the pipe laying for alternate end connection with two roof break-
throughs.
In principle there is a possibility of having an alternative connection with a single roof transit.
• In this case, you should always make sure that the flow line is installed along the roof frame with the
necessary gradient in order then to lay this also at the side of the return flow line through the roof break-
through.
EKSV21P/EKSV26P/EKSH26P
Solar panels on-roof installation
008.1618444_00 – 12/2012