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

6 Electrical installation
6.5

Controller PCB at a glance

L N
ZH
1
N
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 sensor + 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
30
1 2 3 4 5
Z u A uf N L N L N L N
L P /UV 1 ZP SK 2 -P HK 2 -P
2 3 4 5
L N L N L N L N L
32 31 30 29 28
6 7 8
Z u A uf N 1 2 1 2 1 2
HK2 VF2 RF1 VF1
S CH 6 7 8 A SB
2 1 L N 2 1 L N 2 1
27 26 25 24 23
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
Installation instructions geoTHERM VWS/VWW 0020051574_01
9 10 11 12 13
- +
1 2 DCF O T AF 1 2 1 2
SP BUS DC F / AF E VU 1xZP
Caution!
Risk of damage!
The following applies for external actua-
tors and actuators provided on the cus-
tomer side: I = 2 A, U
max
The maximum current of all actuators/
consumers must not exceed 4 A at the
controller PCB.
14
15
16
17
18
19
20
21
22
= 230 V
max