25Installation instructions geoTHERM VWS/VWW 0020051574_016.3 Electronic switchboxh NoteDepending on the model version, the de-tails of the electronic switchbox for yourheat pump may differ from those shownin Fig. 6.1.ABB A8-30-01ABB A12-30-01 ABB A12-30-01 ABB A12-30-01L3 L2 L1NPE L3 L2 L1NPE L3 L2 L1NPEL3 L3 L2 L1N NPEL3 L2 L1 S SNPE L2 L1L3NABB A8-30-01ABB A8-30-01ABB A8-30-011L L L L L 1 LN N N N N 2 N 2 1 2 1L N2 3 4 5 SCH 6 7 8 ASBN NAufZuL N 1 2 1 2 1 2 1 2 1 2 1 2DCF OT AF -+AufZuZHNLZPNLSK2-PNLHK2-P HK2 VF2 RF1 VF1 SP BUS DCF/AF EVU 1xZPLP/UV 112314131110456789Schütz für externeZusatzheizung12Fig. 6.1 Electronic switchboxKey to Fig. 6.11 Cable clamps2 Power supply, heat pump3 Inrush current limiter PCB with LED indicator for inrush currentlimiter (lights up green if OK)4 VWW only: thermal overcurrent relay5 VWW only: adjustment dial for immersion pump overcurrent6 Protector contactor, brine pump7 VWS 380/2 and VWS 460/2 only: control contactor, brinepump8 VWW only: control contactor, immersion pump with overcurrentrelay (motor protection)9 Contactor, inrush current limiter10 Control contactor, compressor11 Protector contactor, compressor12 Contactor for auxiliary heating13 Controller PCB14 Terminal strip for sensors and external componentsAdditionally, there are two coiled cables hanging insidethe electronic switchbox (not shown here):- small two-way plug:connecting cable for the operating console- large three-way plug:power supply for vrnetDIALOGA vrnetDIALOG cable for connection to the eBUS is alsoincluded in the scope of delivery (enclosure).6.4 Connecting the power supplyDifferent types of power supply are provided for heatpumps by the power companies. The heat pump can beoperated with various types of mains feed. Three typesof connection are described on the following pages.• Pass the power supply cable(s) through the elongatedhole in the rear of the unit.• Pass the cables through the unit, through the appro-priate strain relief clamps and on to the connectionterminals on the connector strip.• Carry out the wiring of the connection as illustrated inthe following wiring diagrams.a Caution!The appliance casing must be fitted aftercompletion of the installation work.Electrical installation 6