Non-Pressurised System; Pressurised System - Daikin EKSV21P Installation Manual

3.3.1 Non-pressurised System

• Lay prefabricated connection pipes (feed and return flow) with integrated sensor cable (see chapter 2 "Product description",
page 13) between the planned installation site and the solar panel area in the inner roof and the installation location of the
hot water storage tank with control system and EKSRPS3 pump unit.
– Make sure there is adequate length for connection to the hot water storage tank and the flat solar panels.
– Make sure that there is a constant gradient in the connecting pipes (min. 2 %).
– The maximum permissible overall pipe length must not be exceeded (see tab. 3-1).
Number of solar panels Max. possible total length
Tab. 3-1
Additional notes about connecting pipes
If on-site conditions make it impossible or very difficult to install the connecting pipes in the manner described above, slight devia-
tions from the specified installation are permitted. Hereby, the inflow pipe may not be larger than 18 x 1 mm.
1. If vertical copper pipes are already installed in the house, they can be used if a continuous connection pipe gradient can be
guaranteed.
2. If a uniform gradient from the second roof penetration to all pipe sections can not be guaranteed when the solar panels are
connected at opposite ends, then for roof penetration purposes, the inflow pipe can be connected to the top of (e.g. through
a ventilating tile), if:
– the highest point if the inflow pipe is not more than 12 m above the storage cylinder mounting floor level,
– the internal diameter of the inflow pipe is not more than 16 mm.
– a continuous rise of the inflow pipe to the highest point, as well as a continuous gradient to the storage cylinder is
3. For pipe runs in which only a limited gradient can be achieved, copper pipe should be used on site. This avoids the need for a
rigid supporting structure, and prevents the formation of water pockets due to expansion of the plastic pipes.

3.3.2 Pressurised system

The connection pipe between the solar panel array and the hot water storage tank must be made of pressure-resistant metal
piping (CON XP16 / CON XP20 or Cu Ø 22 mm). Plastic pipes must not be used.
For the roof breakthrough DAIKIN recommends routing the connecting pipes through a ventilation tile to the inside of the roof.
EKSV21P/EKSV26P/EKSH26P
Solar panels on-roof installation
008.1618444_00 – 12/2012
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.
of pipe
2
3
4
5
Maximum lengths of the DAIKIN connection pipes
ensured.
45 m
30 m
17 m
15 m
3 x Installation
If larger distances need to be covered, calculations
need to be made for the dimensioning of the con-
necting pipes.
Contact DAIKIN Service.
Installation instructions
17