5 Installation
14
Installation and maintenance instructions aroCOLLECT 0020217119_01
A
From the heat source
to the heat pump (hot
brine)
B
From the heat pump to
the heat source (cold
brine)
*
One way
1.
Install the brine lines between the product and the heat
pump within the building and using all of the associated
components in accordance with the applicable technical
directives.
Note
Do not install dirt filters in the brine circuit for
a prolonged period of time. The brine fluid is
cleaned during the filling process.
2.
Reduce the pre-charge pressure of the brine diaphragm
expansion tank (which is available as an accessory)
from 0.25 MPa (2.5 bar) to 0.10 MPa (1.0 bar).
3.
Insulate all of the brine lines and the connections for
the heat pump and product so that they are vapour-
diffusion-tight.
Note
Vaillant recommends that you install the
Vaillant heat pump brine filling unit. By do-
ing this, it is then possible to carry out a pre-
paratory partial bleed of the brine circuit, e. g.
the flow and return of the brine circuit to the
product.
5.8
Filling and purging the brine circuit
5.8.1
Calculating the required volume of brine
fluid
▶
Use the information in the following table to calculate the
required volume of brine fluid.
▶
Plan an allowance of 10 l for the calculated volume in
order to facilitate the rinsing process.
▶
Label the vessel for the remaining volume with informa-
tion about the type and concentration of brine fluid and,
after start-up, pass the vessel on to the operator so that
they have brine fluid available for when the tank needs to
be topped up.
Brine fluid volume in the product in litres (
±
1
litre)
Total
VWF 5x/4 + VWL 11/4 SA
2.5 + 19
21.5
VWF 57/4 S1 + VWL 11/4 SA
2.5 + 19
21.5
VWF 8x/4 + VWL 11/4 SA
3.1 + 19
22.1
VWF 87/4 S1 + VWL 11/4 SA
3.1 + 19
22.1
VWF 11x/4 + VWL 11/4 SA
3.6 + 19
22.6
VWF 117/4 S1 + VWL 11/4 SA
3.6 + 19
22.6
VWF 157/4 + 2x VWL 11/4 SA
4.5 + 38
42.5
VWF 157/4 S1 + 2x VWL 11/4 SA
4.5 + 38
42.5
VWF 197/4 + 2x VWL 11/4 SA
5.3 + 38
43.3
VWF 197/4 S1 + 2x VWL 11/4 SA
5.3 + 38
43.3
Pipe type
Brine fluid volume per running metre
in litres
DN 40
0,8
DN 50
1,26
Example
VWF 197/4
with
VWL 11/4 SA
and 60 m DN 50 PE pipe
provides the following total content in litres:
5.3 + 2 x 19 + 60 x 1.26 + 10 (reserve) = 129 l.
