(C) IDM ENERGIESYSTEME GMBH
Installation instructions iPump A 3-11
45
heating side installation
Ka
p
it
e
l 1
2
12. Heating side installation
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.
- Pipe dimensions must conform to the required
fl
ow
volumes (see section „technical data“ in this instal-
lation instruction).
- 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, the connection lines should be
insulated using suitable material.
Oxygen diffusion
With plastic pipe under
fl
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 con-
sisting of calcium carbonate) on heat exchanger
surfaces in particular, i.e. with a high proportion of
calcium hydrogen carbonate there is an increased
risk of lime scale forming. For
fi
lling heating systems,
very clear guidelines apply relating to the heating
water quality.
Speci
fi
cally, European standard EN 12 828, ÖNORM
H 5195 and in particular VDI Guideline no. 2035 must
be observed and represent the current state of art.
You must also check the pH-value of the heating
water. It should be between 8 and 9.5.
In order to prevent damage through corrosion, silt up
or calci
fi
cation in the heating system, the water used
to
fi
ll the storage vessel and heating system must be
treated in accordance with VDI directive 2035, EN
12828 or ÖNORM H 5195.
This directive deals with the following measures for
this:
Decalcifi cation / Demineralization
The most reliable procedures for avoiding calci
fi
ca-
tion are decalci
fi
cation and demineralization. Here
calcium and magnesium ions are removed from the
water.
Physical processes
Permanently magnetic or electrical
fi
elds should pre-
vent calci
fi
cation for this. Plausible indications regar-
ding the effect and function are not currently extant.
Use of rain water
A simple and cost-effective option for avoiding calci-
fi
cation involves using rain water as heating water. It
is almost lime-free, but may be acidic, in other words
aggressive, against the system components. A pH-
value test is advisable here. The pH-value should be
in the range from 8.2 to 9.5.
In case of repairs
If it is necessary to empty the storage vessel of the
iPump A 3-11 due to repair work, the system must be
re
fi
lled with treated water.
Alternatively, the emptied water can be collected and
used again.
Existing heating systems
In order to prevent impurities and silting, an already
existing heating system must be thoroughly rinsed
before!
Filling and emptying
Corresponding
fi
lling and emptying valves are provi-
ded for easy
fi
lling and emptying.
