C
2.10 Connection on the heating side
Wrong water flows by reason of wrong
pipe dimensions, wrong fittings or in-
correct pump operation can cause fatal
disfunction.
Page 10
The appropriated laws, regulations and Norms for
heating installations are also valid for installations
that include heat pumps.
It is obligatory to fit a filter into the heating return
before the heat pump.
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The circulating pump power has to match the instal-
lation (see technical data on page 3 and 4)
The safety and expansion installations for closed
heating systems relevant to EN 12828 have to be
provided.
The connection pipes should be as short as possi-
ble. The pipe dimensions have to match the requi-
red water flow. (See technical data on page 3 and 4)
The enclosed flexible connection pipes for the hea-
ting flow and return as well as for the brine and
groundwater circuit have to be used. The connecti-
on pipes can be shortened to a desired length
though not shorter than 60cm! Further the connecti-
on pipes must not be kinked!
At the highest point of the pipes has to be an air vent
as well as a drain on the lowest point.
To avoid heat losses, the connection pipes have to
be insulated with an appropriate material.
Oxygen diffusion
If not diffusion proof plastic pipes for the under floor
heating or a vented heating system is used, it can
happen that, if steel pipes, steel radiators or steel buf-
fer are installed, corrosion occurs onto these steel
parts.
Corrosion particles can settle down into the liquidizer
and can cause power losses of the heat pump or high
pressure faults.
Therefore it should be avoided to use vented heating
systems or steel pipe installations in connection with
non diffusion proof under floor heating pipes.
Heating water quality
Depending on the Heating water quality stone forma-
tion (solids mainly from calcium carbon) especially
onto the heat exchanger surface can occur. With a
high Calcium hydrocarbon content it is a higher risk
of stone formation.
Therefore at Installations with a water hardness of
more than 14°dH resp. with a Calcium hydrocarbon
concentration of more than 2,5 mol/m³ the heating
water has to be treated. (Softened/desalted)
T h e
C a l c i u m
h y d r o c a r b o n
c o n c e n t r a t i o n
c(Ca(HCO3)2) of you heating water can be got from
your local water supplier.
The ph-value also needs to be checked and has to be
in between 8 and 9,5.
