Installation instructions geoTHERM VWS/VWW 0020051574_01
30
6.5
Controller PCB at a glance
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
S
CH 6
7
8
A SB
N N
A uf
Z u
L
N
1 2 1 2 1 2 1 2
1 2 1 2
DCF O T AF
-
+
A uf
Z u
ZH
N
L
ZP
N
L
SK 2 -P
N
L
HK 2 -P HK2
VF2
RF1
VF1
SP
BUS
DC
F / AF E
VU 1xZP
L P /UV 1
1
3
5
7
8
9
10
11
12
13
20
32
31
30
29
28
27
26
25
24
23
14
15
17
16
18
2
4
6
21
22
19
Fig. 6.6 Controller PCB
Key to Fig. 6.6
Upper connection terminals
1
ZH
External electric auxiliary heating
2
CP/SV1
External 3-port diverter valve for DHW loading
3
ZP
Circulation pump for hot water
4 SK2-P
VWS: cooling contact with cooling hydraulics
VWW: contactor, immersion pump
5 HK2-P
External (second) heating circuit pump
6 HK2
Actuation of 3-way mixer valve or 3-way diverter
valve (depending on hydraulic plan)
7
VF2
External flow sensor
8 RF1
Buffer cylinder base temperature sensor
9 VF1
Buffer cylinder head temperature sensor
10 BUS
eBUS
11 DCF / AF Outside temperature DCF signal
12 EVU
EVU contact (supply interruption, ripple control sig-
nal from power company)
open: compressor operation permitted
closed: compressor operation blocked
13 1xZP
Contact for non-recurring request for the circulation
pump, e. g. via external button
PCB components
14 eBUS/vrDIALOG
15 eBUS address rotary switch, set to "1" (factory setting)
16 Fuse T 4A/250 V for controller PCB
17 Check LED for power supply (lights green if OK)
18 T 4A/250 V fuse for brine pump
19 Monitoring of compressor phase sequence
20 Plug for display (user interface)
21 Sensor connection plug 1
22 Sensor connection plug 2
Lower connection terminals
23 ASB Inrush current limiter
24 8
Compressor contactor
25 7
Pressostat safety chain
26 6
(not connected)
27 SCH
Brine pressure switch (accessory) on modular terminal
(VWW: Flow switch)
28 5
Brine pump (VWS only)
29 4
Power supply, controller PCB
30 3
Heating circuit pump (on modular terminal)
31 2
Unused
32 1
Actuation of 3-way mixer valve, brine circuit (VWS only,
on modular terminal)
a
Caution!
Risk of damage!
The following applies for external actua-
tors and actuators provided on the cus-
tomer side: I
max
= 2 A, U
max
= 230 V
The maximum current of all actuators/
consumers must not exceed 4 A at the
controller PCB.
6 Electrical installation
