Controller Pcb At A Glance - Vaillant geoTHERM VWS Installation Instructions Manual

6.5

Controller PCB at a glance

L N
ZH
1
N
Fig. 6.7 Controller PCB
Key to Fig. 6.7
Upper connection terminals
1 <ZH> Electric auxiliary heating
2 LP / UV 1 3-port diverter valve for hot water generation
3 <ZP> Circulation pump for hot water
4 <SK2-P> unused
5 <HK2-P> External (second) heating circuit pump
6 <HK2> Actuation of 3-way mixer valve
7 VF2 External flow sensor - must always be installed!
8 RF1 Temperature at bottom of buffer cylinder
9 VF1 Temperature at top of buffer cylinder
10 SP DHW cylinder temperature sensor
11 BUS eBUS
12 DCF / AF Outside temperature sensor + DCF signal
13 EVU EVU contact (ripple control signal from power
company)
open: compressor operation permitted
closed: compressor operation blocked
14 1xZP Contact for one-shot request for
circulation pump, e.g. via button
PCB components
15 eBUS/vrDIALOG
16 eBUS address rotary switch, set to "1" (factory setting)
17 Fuse T 4A/250 V
Installation instructions geoTHERM VWS 0020046310_01
1 2 3 4 5
Zu Auf N L N L N L N
LP/UV 1 ZP SK2-P HK2-P
2 3 4 5
L N L N L N L N L
33 32 31 30 29
6 7 8
Zu Auf N 1 2 1 2 1 2
HK2 VF2 RF1 VF1
SCH 6 7 8 ASB
2 1 L N 2 1 L N 2 1
28 27 26 25 24
18 Check LED for power supply (lights green if OK)
19 Fuse T 4A/250 V for brine pump
20 Monitoring for starting current limiter
21 Controller plug (User Interface)
22 Sensor connection plug 1
23 Sensor connection plug 2
Lower connection terminals
24 ASB Actuation of starting current limiter
25 8 Compressor contactor
26 7 Pressure switch
27 6 (not connected)
28 SCH unused
29 5 Brine pump
30 4 Power supply, PCB
31 3 Internal heating circuit pump
32 2 unused
33 1 unused
The controller PCB has a protective cover plate which
has cut-outs for the eBUS/vrDIALOG (Item 15) connec-
tion, as well as for the power supply LED (Item 18).
The cover plate must be removed to change the fuses,
Items 17 and 19.
Electrical installation 6
9 10 11 12 13 14
- +
1 2 DCF OT AF 1 2 1 2
SP BUS DCF/AF EVU 1xZP
15
16
17
18
19
20
21
22
23
31