Vaillant geoTHERM VWS Series, Installation Instructions Manual

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Installation instructions geoTHERM VWS/VWW 0020057444_01
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6.7.2 Direct heating operation (Hydraulic plan 1)
The heat pump is connected directly to the underfloor
heating circuit. Control is carried out using energy bal-
ance control by default (see Chap. 8.4.2). To do this, the
VF2 flow temperature sensor must be connected (floor
protection circuit).
400 V
400 V
WQ
16
42b
32
VF2
30
31
30
31
42a
33
AF
VF2
30
31
39
27
Fig. 6.8 Hydraulic plan 1
Key to Fig. 6.8
16 External sensor (AF)
30 Non-return valve
31 Control valve with position indication
32 Cap valve
33 Air separator/Dirt filter
42a Expansion relief valve
42b Expansion vessel
43 Safety group for hot water pipe
VF2 Supply temperature sensor
WQ
Heat source circuit
optional for hydraulic decoupling:
27
Heating circuit pump with control line to the heat pump
39 Low loss header
h
Note!
Should hydraulic decoupling of the heat-
ing circuit be necessary, then fit a low
loss header and an external heating cir-
cuit pump as shown in Fig. 6.8.
h
Note!
If you have fitted a low loss header be-
tween the heat pump and the heating
system, then the VF2 temperature sen-
sor must be mounted in the flow line
from the low loss header to the heating
system.
6 Electrical installation