Vaillant geoTHERM SERIES Instalační manuál stáhnout pdf (Strana 29)

29Installation instructions geoTHERM VWS/VWW 0020057444_01

6.4.4 Connecting external components

L3 L2 L1 L3 L3 L3 NL2 ZL1 AN N N N PE PE

PE L2 L1 L3 N

PES S

(VWS)

L3 L2 L1 N PE

(VWW)

Fig. 6.5 Connecting external components

Key to Fig. 6.5

Pump

Heat source circuit

Brine Switch

3-way valve with solenoid

Only if the VPA Multi-cylinder or some other multi-

cylinder is installed

• Connect the external 3-way valve for the multi-cylin-

der to the terminals (3).

Note!

When using an external 3-way valve, the

proper functioning of the heat pump is

only assured if the valve supplied with

the VPA Multi-cylinder is used.

VWW only:

• Connect the customer-side well pump to the

terminals (1).

The well pump is connected to the 400 V three-phase

supply via the well pump contactor.

A motor protection switch in the heat pump (see Fig. 6.1,

Item 5) protects the well pump from overload. The

switch should be set to the well pump's rated current

(0.8 – 2.7 A).

Caution!

Risk of damage!

The well pump will not be protected from

overload unless the motor protection

switch is properly set.

VWS only:

Should you wish to connect an external brine pressure

switch to the heat pump, use the terminals (2) for this.

6.5 Connecting the start-up current limiter

(accessory)

Some power companies demand the installation of a

start-up current limiter (Art. No. 0020025744) for the

heat pump.

• Fit the start-up current limiter PCB beneath the con-

troller PCB as described in its manual (see Fig. 6.1).

• Connect the start-up current limiter in accordance

with its manual.

Electrical installation 6

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