INSTALLATION
Charging the brine circuit
58
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12. Charging the brine circuit
Note
f
f
Observe the regional and national regulations before
filling with heat transfer medium.
Calculate the volume of the heat source circuit. The brine volume
of the heat pump under operating conditions can be found in the
data table (see chapter “Specification”).
The overall volume is equal to the required amount of brine made
by mixing undiluted ethylene glycol and water. The chloride con-
tent of the water must not exceed 300 ppm.
12.1 Mixing ratio
The brine concentration varies depending on whether a geother-
mal collector or a geothermal probe is used as the heat source.
For the mixing ratio see the table below.
Ethylene glycol
Water
Geothermal probe
25 %
75 %
Geothermal collector
33 %
67 %
12.2 Charging the brine circuit
WPE-I 33 H 400 Premium | WPE-I 44 H 400 Premium
D
00000
83
98
3
1
1 Drain
f
f
Fill the brine circuit via the drain.
After filling the system with brine and prior to commissioning, vent
the brine circuit until there is no more air left in it.
WPE-I 59 H 400 Premium | WPE-I 87 H 400 Premium
D
00000
83
95
6
1
1 Drain
f
f
Fill the brine circuit via the drain.
After filling the system with brine and prior to commissioning, vent
the brine circuit until there is no more air left in it.
12.3 Check the brine concentration
f
f
Determine the density of the ethylene glycol/water mixture,
e.g. with a hydrometer.
Using the actual density and temperature, you can check the actual
concentration in the diagram.
Note
The quoted performance data relates to ethylene glycol
(see “Specification”).
1,10
1,09
1,08
1,07
1,06
1,04
1,03
1,02
1,01
1,00
0,99
0,98
-20
0
20
40
60
80
100
50 Vol.-%
0
1,05
40
33
30
25
20
10
A
26
�0
3�
01
�1
91
4
X Temperature [°C]
Y Density [g/cm³]
A Frost protection [°C]
13. Commissioning
!
Material losses
Do not operate the appliance until the heating system, the
heat source system and the hot water boiler have been
filled and vented to the correct pressure.
Note
The sensor on the heating flow and the outside sensor
must be connected so that the appliance can calculate the
required heating output.