Installation instructions geoTHERM VWS/VWW 0020051574_01
38
Key to Fig. 6.12
3
geoTHERM VWS heat pump
5
Domestic hot water cylinder
13
Weather-controlled energy balance controller
13a
VR 90 remote control unit
13b
Mixer module VR 60
16
External sensor/DCF receiver
19
Maximum thermostat
30
Non-return valve
31
Regulating valve
32
Cap valve
33
Dirt trap
36
Thermometer
40
Heat exchanger, passive cooling
42a Expansion
relief
valve
42b
Diaphragm expansion tank
42c
Diaphragm expansion tank, tap water
43
Safety group, hot water connection
52
Valve, individual room control
58
Fill and drain valve
66
Pump, cooling circuit
67
Mixer, cooling circuit
KP
Circulation pump, heat pump circuit
HKa-P CH
pump
HKb-P CH
pump
HKa
Mixer module for heating circuit
HKb
Mixer module for heating circuit
CP/SV1 Switching valve
RF1
Return temperature sensor
SK2-P Diverter
valve,
cooling
SP
Cylinder temperature sensor
VFa Supply
temperature
sensor
VFb Supply
temperature
sensor
VF1 Supply
temperature
sensor
VF2 Supply
temperature
sensor
ZH
Electric auxiliary heating
ZP
Circulation pump
a
Caution!
Danger of leakage when using potassium
carbonate as brine fluid!
In contrast to units without a cooling
function, the use of calcium carbonate/
water as brine fluid is not permitted if
passive cooling has been installed by the
customer as it may react with the seal-
ing plastics in the mixer valve.
a
Caution!
Danger of falling below the dew point and
condensate formation!
All pipes in the heating circuit must be
provided with vapour diffusion-tight in-
sulation.
The Vaillant geoTHERM heat pump de-
scribed here is not suitable for use with
radiator heaters.
a
Caution!
Danger of falling below the dew point and
condensate formation!
The heating flow temperature setting
must not be too low in cooling mode. The
cooling function is still effective with a
flow temperature of 20 °C.
h
Note
Additional hydraulic components that
require adjustment are listed in the cor-
responding planning information (PLI).
6.7
Connecting the DCF receiver
AF
0
DCF
AF
0
DCF
1
L
L
L
L
L
1
L
N
N
N
N
N
2
N 2 1
2 1
L N
2
3
4
5
SCH
6
7
8
ASB
N
N
Auf
Zu
L
N
1
2
1
2
1
2
1
2
1
2
1
2
DCF OT AF
-
+
Auf
Zu
ZH
N
L
ZP
N
L
SK2-P
N
L
HK2-P
HK2
VF2
RF1
VF1
SP
BUS
DCF/AF
EVU
1xZP
LP/UV 1
Fig. 6.13 Connecting the VRC DCF receiver
• Wire the DCF receiver as shown in Fig. 6.13:
- left: enclosed external sensor (DCF receiver)
- right: alternative solution with separate external
sensor
A special solution with a separate VRC 693 outdoor sen-
sor may be necessary - if no radio reception is available
at the mounting location of the outdoor sensor, for ex-
ample.
6.8 Connecting
accessories
a
Caution!
Risk of damage!
Switch off the power before connecting
additional units to the eBUS.
You can connect the following accessories:
- Up to six VR 60 mixer modules to expand the system
by twelve system circuits (factory pre-set as mixer cir-
cuits).
- Up to eight VR 80/VR 90 remote control units to con-
trol the first eight heating circuits.
- vrnetDIALOG 840/2 or 860/2
- Connection in each case to eBUS terminal
(see Fig. 6.6, Item
14
), connected in parallel.
6 Electrical installation
