Direct Heating Operation And Domestic Hot Water Cylinder (Hydraulic Plan 3) - Vaillant geoTHERM VWS Installation Instructions Manual

6.6.4 Direct heating operation and domestic hot
water cylinder (Hydraulic plan 3)
The heat pump is connected directly to the underfloor
heating circuit. Control system is carried out using ener-
gy balance control by default (see Chap. 8.4.2). The VF2
flow temperature sensor must be connected (floor pro-
tection circuit).
The heat pump also supplies a domestic hot water cylin-
der.
16
AF
WQ
230 V
230 V
Fig. 6.11 Hydraulic plan 3
Key to Fig. 6.11
30 Gravity brake
31 Control valve with position indication
32 Cap valve
33 Air separator/Dirt filter
42a Expansion relief valve
42b Expansion vessel
AF Outdoor sensor
VF2 supply temperature sensor
WQ Heat source circuit
KW Cold water
optional for hydraulic decoupling:
27 Heating circuit pump with control line to the heat pump
39 Hydraulic switch
Installation instructions geoTHERM VWS 0020046310_01
42a
VF2
33
32
42b
SP
h
Note!
Should hydraulic decoupling of the hea-
ting circuit be necessary, then fit a low
loss header and an external heating cir-
cuit pump as shown in Fig. 6.11.
Electrical installation 6
30 30
31 31
VF2
27
39
25
43
30
31
KW
35