NOTICE!
Make the heat insulation of the brine pipes dif-
fusion-proof.
NOTICE!
The brine must consist of at least 25% anti-
freeze protection based on monoethylene glycol
and must be mixed before filling.
Filling the brine
The built-in diaphragm expansion vessel provided
by the customer is open and sealed at the factory.
n
Check the inlet pressure (set pressure: 0.5 bar)
of the brine-side diaphragm pressure expan-
sion vessel.
n
Adjust the pre-pressure if necessary.
The brine/water heat pump is equipped with a
brine/water flow switch in the brine cycle. The brine
flow switch prevents brine from entering the
ground in the event of a leakage in the brine cycle.
If the pressure in the brine cycle falls below 0.7
bar, the brine pressure switch available as an
accessory switches the heat pump off. In order for
the heat pump to be released again, the pressure
must be increased to at least 1.5 bar when the
heat pump is at a standstill. To prevent the brine
pressure switch from switching off the heat pump
without leakage, the heat source side of the heat
pump must be filled with a minimum pressure of
>1.5 bar during installation.
Checking the brine concentration:
Determine the density of the ethylene glycol-water
mixture, for example with an hydrometer. On the
basis of the measured density and temperature
you can read off the existing concentration from
the diagram.
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.-%
1,05
40
33
30
25
20
10
A
0
Fig. 13: Determining brine concentration
A: Frost resistance [°C]
X: Temperature [°C]
Y: Density [g/cm
3
]
REMKO series WSP
28