LK Armatur - 2025

TECHNICAL DATA

Angle of rotation

60°/360°

Leakage

Leakage Solar:

< 0.1% of Kvs at 100 kPa

< 0.5% of Kvs at 100 kPa

Operation time

8 seconds (60°)

Max. working pressure

1.0 MPa (10 bar)

Max. differential pressure

100 kPa (1 bar)

Working temperature

Art.no. 066399, 066418:

Cooling/Heating (inkl.

adapter):

Min. 5 °C/Max. 80 °C (90 °C briefly)

Min. 5 °C/Max. 70 °C (80 °C briefly)

Min. -15 °C/Max. 120 °C (160 °C

briefly)

Ambient temperature

Min. 1 °C/Max. 60 °C

Thread standard

Rp - female thread,

G - male thread, ISO 228/1

Protection type

IP 40 (Molex®) / IP 44 (Cable)

Media

Water - Glycol mixture max. 50%

Ethanol mixture max. 30%

Electrical connection

Fixed wire alternatively Molex®

or Molex®-compatible connector,

6-circuit

Signal connector

Single pole SPST

Cable specification

Dimension 3 x 0.75 mm2

Wire colours

Blue, brown, black

External insulation

PVC

Actuator

7 VA, 230 VAC, 50 Hz

7 VA, 24 VAC, 50 Hz

Material valve body

Brass EN 12165 CW617N

Material external cover

Brass EN 12164 CW614N

Material slide/spindle

PPS Composite

Type approval certificate

CE (Actuator only)

Zone Valve

LK 525 MultiZone 3W

• Turning slide to reduce risk of stalling

• Minimal internal leakage

• Quick and easy assembly with clip system

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8.0

WIRING DIAGRAM

Open

Closed

B

A

Closed

Open

CAPACITY DIAGRAM

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100.0

10.0

1.0

0.1

Kvs (m3/h)

LK 525 MultiZone 3W is a motorized 3-way zone valve for On/

Off control. The zone valve is designed with a turning slide which

allows it to withstand a larger pressure difference and reduces

the risk of it stalling after a long intermission. This makes it

especially suited for heat pump applications where there can

be long intermissions between the changes to the direction of

the flow during the warm season. On the upper surface of the

actuator is an indicator that shows which port is open.

Installing the 066177 plastic adapter between the valve unit and

the motor protects the motor against condensation, icing and

high temperatures.

The zone valve must not be installed with the motor underneath

the valve unit.

In case of a power failure, the valve cone stays in its current po-

sition. When the power is switched off, the valve can be manual-

ly set to the centre position, which distributes the flow between

the heating and tap water circuits. Remove the motor and turn

the spindle about 30° or turn until hot water flows through both

valve ports. When the power is restored, turn the valve back to

its original position and reinstall the motor.

Please note that the motor can be installed in only one position.

0.1

1.0

10.0

Pressure Drop (kPa)

100.0

7.0

115

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