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LK 840 ThermoMix® C

LK 840 ThermoMix C is a motorized 3-way valve that can be used as a mixing valve or as a diverting valve in heating systems.

Variants
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Variants

LK 940 C 2 variants

Article	Connection	Voltage	Torque	Operation time	A mm	B mm	C mm	D mm	E mm	Weight (kg)	Dimensional sketch	Item List
066127	1 m cable	230 V	5 Nm	110 s*	109	58	45	73	85	0.4
066128	1 m cable 0-10 VDC	24 VAC	5 Nm	110 s*	109	58	45	73	85	0.4

Connection	1 m cable
Voltage	230 V
Torque	5 Nm
Operation time	110 s*
A mm	109
B mm	58
C mm	45
D mm	73
E mm	85
Weight (kg)	0.4
Dimensional sketch
Item list

Connection	1 m cable 0-10 VDC
Voltage	24 VAC
Torque	5 Nm
Operation time	110 s*
A mm	109
B mm	58
C mm	45
D mm	73
E mm	85
Weight (kg)	0.4
Dimensional sketch
Item list

Detailed Information

Description

LK 840 ThermoMix C is a motorized 3-way valve that can be used as a mixing valve or as a diverting valve in heating systems.

Actuator LK 940 ThermoMix C shall be used on LK 840 ThermoMix C. Assembly/disassembly of actuator on LK 840 ThermoMix C is simple and secure, using the clip-system.

Depending on model the actuator can be operated by a controller with a 3-point SPDT output or a proportional 0-10 V / 4-20 mA output. The angle of rotation is electrically limited to 90°.

When needed, the actuator can be put into manual mode by pressing the button on the housing cover. The actuator can now be put in any position by turning the handle on the front. The position is indicated on the reversible scale.

Technical Data

Angle of rotation:	90°/360° (Mixing valve) 90° (Actuator - electically limited)
Torque:	< 1 Nm (Mixing valve) 5 Nm (Actuator)
Leakage:	< 1% of Kvs at 50 kPa
Operation time:	110 s
Max. working pressure:	1.0 Mpa (10 bar)
Max. differential pressure:	50 kPa (0.5 bar)
Working temperature:	Min. 5 °C/Max. 110 °C (120 °C briefly)
Ambient temperature:	Min. 5 °C/Max. 60 °C (Mixing valve) Min. 0 °C/Max. 50 °C (Actuator)
Position indication:	Reversible scale
Direction of operation:	Selectable
Manual override:	Disengagement of gears
Thread standard:	Rp - female thread, G - male thread
Protection type:	IP 44
Protection class:	II
Media 1:	Water - Glycol mixture max. 50% Ethanol mixture max. 30%
Electrical connection:	Cable 1 m
Signal connector:	3-point SPDT 0 - 10 VDC/4-20 mA
Actuator:	230 VAC 50 Hz 24 VAC 50 Hz
Material, valve body:	Brass EN 12165 CW617N
Material, slide/spindle:	Brass EN 12165 CW617N
Material, sealing:	EPDM
Spindle sealing:	Two O-rings