2.6 Operational limits
Seite 5
TERRA-S resp. TERRA-W heat pumps must be
only operated with the heat carrier medium brine
or Groundwater. Other heat carrier media are not
permitted.
Further it is not allowed to heat other fluids than
heating water.
(Heating water quality see page 10)
Heat pumps have natural pressure resp. tempe-
rature operation limits. (See illustration)
It is not allowed to operate the TERRA heat pump
outside these operational limits.
With groundwater heat pumps the groundwater
has to have a certain water quality, see page 18. If
one of those values is below or exceeds these li-
mits it is not allowed to use the groundwater heat
pump with this groundwater.
There are several safety applications integrated
to protect the heat pump
A combined high and low pressure manome-
ter which can be reset by switching the machi-
ne off and back on.
Max. flow temperature limit with will automati-
cally reset.
A Thermorelais which can be reset by swit-
ching the machine off and back on.
Internal winding protection
With groundwater heat pumps: minimum tem-
perature limit for the groundwater return tem-
perature and integrated water pressure
switch.
Note:
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°C
70
60
50
40
30
20
10
0
flow
temperature
Range of application for brine heat pumps
Range of application for groundwater heat
-10
0
10
20
30
40 °C
groundwater inlet temperature
°C
70
60
50
40
30
20
10
0
flow
temperature
Minimum groundwater
inlet temperature: 7°C!
Also during the winter the
groundwater inlet temperature
must not drop below 7°C!
-20
-10
0
10
20
30°C
brine inlet temperature
