Installation instructions geoTHERM VWS/VWW 0020057444_01
38
6.10
Connecting an external boiler
If your external boiler has a Vaillant eBUS interface, you
can connect it to the heat pump eBUS via the VR 32 ac-
cessory (see also the VR 32 manual regarding this).
ABB A12-30-01
L1
L2
L3
N
PE
L1 L2 L3
L1 L2 L3 N
L1 L2
L3'
L3
N N PE
L3 N PE
L1 L2 L3 PE
PE
L2 L3
L1
N
ABB A12-30-01
ABB A12-30-01
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-M
VF2
RF1
VF1
SP
BUS
DCF/AF
EVU
1xZP
LP/UV 1
VR
32
- +
DCF 0 AF
1x 2P
1 2
1 2
Tel BUS
F AF
DC /
Fig. 6.18 Connecting to a boiler with an eBUS interface
Boilers without eBUS interfaces are connected to the in-
ternal auxiliary heating contact (ZH, see Fig. 6.6) via an
isolating relay (accessory, Vaillant No. 306249).
1
ABB A12-30-01
L1
L2
L3
N
PE
L1 L2 L3
L1 L2 L3 N
L1 L2
L3'
L3
N N PE
L3 N PE
L1 L2 L3 PE
PE
L2 L3
L1
N
ABB A12-30-01
ABB A12-30-01
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-M
VF2
RF1
VF1
SP
BUS
DCF/AF
EVU
1xZP
LP/UV 1
N
N
Auf
Zu
L
ZH
LP/UV 1
Fig. 6.19 Connecting to a boiler without an eBUS interface
Key to Fig. 6.19
1 Isolating relay (Accessory No. 306249)
In both cases, the heat pump switches in the external
boiler depending on the heat demand and the controller
setting. To do this, set the hydraulic connection in Menu
C8 "Auxiliary heater 1".
6.11
Fitting the cladding and the operating panel
Fig. 6.20 Fitting the front upper cladding
• Feed the console connector through the opening in
the front lower cladding panel and then press the
panel into the spring retainer on the casing frame.
• Screw the cladding panel to the casing with the two
screws, as shown in Fig. 6.3.
Fig. 6.21 Fitting the operating console
• If you have fitted the vrnetDIALOG communications
unit, plug in the connecting plug and the control cable
supplied in the heat pump accessory kit (see the
vrnetDIALOG manual and Chap. 6.9.3).
6 Electrical installation
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