(C) IDM Energiesysteme GmbH
6. General description
Installation instructions AERO ILM
46
The inspection and the preparation of the
heating water, belongs to the responsi-
bility of the competent heating engineer.
Incorrect
fl
ow rates due to incorrect pip-
ing, incorrect
fi
ttings or improper pump
operation can cause damage!.
6.
6.
6 Exterior installation
General description
General description
6. Heating connections
6.1. Requirements heating connections
The pertinent laws, regulations and standards for
boiler house pipework and also for heat pump sys-
tems must be observed.
- Before the heatpump in the heating return a mag-
netic dirt trap must be installed.
- The safety and expansion devices for closed
heating systems pursuant to EN 12828 must be
provided.
- In case an electrical heating element will be installed
in the thermal storage tank, an additional safety de-
vice must be installed at the thermal storage tank!
- The line dimensioning must comply with the re-
quired
fl
ow volumes.
- The connection hoses for heat pump inlet, return
fl
ow and warm water inlet must be installed. The
connection hoses can be shortened to the desired
length, however, not shorter than 60 cm. Further-
more the connection hoses must not be bent!
- At the highest points of the connection lines venting
options must be provided, and at the lowest points
outlet options.
- In order to avoid energy losses the connection lines
must be insulated with suitable material.
Oxygen di
ff
usion
In the case of non di
ff
usion-resistant under
fl
oor heat-
ing with plastic pipes or open heating systems, corro-
sion may occur in the steel parts if steel pipes, steel
radiators or storage heating systems are used.
Corrosion products can deposit in the condenser
and lead to a capacity loss of the heat pump or high-
pressure disturbances.
Therefore avoid open heating systems or steel pipe
installations in conjunction with non- di
ff
usion-resis-
tant plastic pipes in under
fl
oor heating.
Heating water quality
For
fi
lling heating systems, very clear guidelines ap-
ply relating to the heating water quality Speci
fi
cally,
European standard EN 12 828, ÖNORM H 5195 and
in particular VDI Guideline no. 2035-1 must be ob-
served and represent the latest technological stan-
dards. For example, the hardness of the
fi
lling water
must be taken into account. This is because 1 °dH
means 17 mg of lime per litre that can be separated.
For a heating system with 1,500 l of water content
(bu
ff
er reservoir), this represents 520 grammes of
lime at 20 °dH (in other words, half a kilogram). As the
lime deposits itself at the hottest and narrowest parts
in the system, this means that gas thermals, heat ex-
changer for solar plants, etc. are the most a
ff
ected.
The plate exchanger for the hot water heating (espe-
cially with wood-
fi
red boilers and solar plants) and the
hot gas heat exchanger in the HGL heat pump can
also become calci
fi
ed with very hard heating water in
some circumstances.
For this reason,the heating water must be treated ac-
cording to the standards (softened/demineralised).
The pH value of the heating water should also be
checked;this should be between
8.2 and 9.5.
Hydraulic drain
For easier emptying a drain valve is installed before
the loading pump in the hydraulic piping.
Incorrect
fl
ow volumes due to incorrect
pipework, false
fi
xtures or improper
pump operation can cause damage!
6.2. Safety device
When working with higher temperatures by a bivalent
system than 80 °C, an appropritate safety device
have to be installed on sit
