t h e
p o w e r
f a m i l y
(C) IDM ENERGIESYSTEME GMBH
Montážní návod
Terra SW
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Heat source
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5.3. Groundwater usage
5.3.1.
Popis
In this system, groundwater is used as the heat source.
When using groundwater, the water is pumped from
an extraction reservoir, cooled in the evaporator and
fed via an absorption reservoir back into the ground-
water. In this process, ensure that the absorption
reservoir is laid out in the groundwater flow direction
after the extraction reservoir.
The heat exchange between the water and refriger-
ant takes place in the evaporator (stainless steel plate
heat exchanger).
A minimal temperature limit and a flow switch should
be fitted and connected to protect the evaporator.
The flexible connection hoses supplied should be in
-
stalled to avoid sound transmission. The groundwater
lines need to be created by the customer.
Notes
With an increased solid component (sand, mud),
the relevant sedimentation tank should be fitted to
avoid the evaporator becoming blocked (safety heat
exchanger where appropriate).
-
Lay the incoming and outgoing lines to be frost-
proof, sloping towards the reservoir
-
The lines in the building should be insulated against
condensation
-
From the extraction reservoir to the heat pump, a
safety pipe with electrical cable for the reservoir
pump is also required.
-
Make the reservoir lid light-proof and air-tight to
prevent algae and sediment build-up
-
A submersible pump is recommended for the res-
ervoir pump
-
After completion, the reservoir should be rinsed for
approx. 48 hours.
5.3.2. Application range
Water inlet temperature: at least + 7 °C!
(Risk of frost!)
Groundwater quality:
The following values must be observed:
- ph value:
6.5 - 9
- Chloride:
< 100 mg/kg
- Sulphate:
< 50 mg/kg
- Nitrate:
< 100 mg/kg
- Manganese:
< 0,1 mg/kg*
- Free carbon dioxide:
< 20 mg/kg
- Ammoniac:
< 2 mg/kg
- Iron:
< 0.2 mg/kg*
- Free Chloride:
< 0.5 mg/kg
- Electrical conductivity:
> 50µS/cm und
< 600µS/cm
-
Oxigen:
< 2mg/kg*
* Exceeding these limit values means that the
evaporator and the supply lines silt up, and the sink
reservoir becomes clogged with iron.
To check the water temperature and the water quan-
tity and quality, a test reservoir and a pump test is
recommended for around 48 hours. The test should
ideally be conducted at the end of February.
