T
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P O W E R
F A M I L Y
(C) IDM ENERGIESYSTEME GMBH
7. Allgemeine Beschreibung
Installation instructions Terra CL
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7. Heating Side Connection
7.1. Requirement heating side connection
The relevant laws, regulations and standards for ma-
chine room piping and for heat pump systems must
also be observed.
- It is essential that a dirt trap is fi tted in the heating
return pipe.
- Safety devices and expansion devices for closed
heating systems according to EN 12828 must be
fi tted.
- The dimensioning of the lines must be in accordance
with the required fl ow volumes.
- The connection hoses supplied for the heat pump
fl ow and return lines must always be installed. The
connection hoses can be cut to the required length,
but not shorter than 60 cm. In addition, the connec-
tion hoses must not be bent.
- Venting options should be fi tted at the highest points
of the connection lines, and draining options at the
lowest points.
- To avoid heat loss connection lines should be insu-
lated using suitable material.
Oxygen diffusion
With plastic pipe underfl oor heating or open heating
systems which are not diffusion-tight, corrosion may
occur on steel parts when using steel pipes, steel
radiators or storage tanks due to oxygen diffusion.
Corrosion products can be deposited in the conden-
ser and may cause heating losses to the heat pump
or high-pressure faults.
For this reason, open heating systems or steel pipe
installations in combination with plastic pipe under-
fl oor heating which is not diffusion-tight should be
avoided.
Heating water quality
Depending on the quality of the heating water, lime
scale may occur (adherent coating primarily consisting
of calcium carbonate) on heat exchanger surfaces in
particular, i.e. with a high proportion of calcium hydro-
gen carbonate there is a risk of lime scale forming.
For this reason, in systems with a water hardness
of over 14°dH or with a calcium hydrogen carbonate
concentration of more than 2.5 mol/m³, the heating
water should be treated accordingly (softened/demi-
neralised).
Information on the calcium hydrogen carbonate con-
centration c(Ca(HCO3)2) of your heating water can
be obtained from your water supply company.
The pH value should also be checked; this should be
between 8 and 9.5.
- EN 12828
- ÖNORM H 5195
- VDI Directive no. 2034-1
Incorrect fl ow volumes due to incorrect
pipework, incorrect fi ttings or incorrect
pump operation may cause damage.
