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LK 840 ThermoMix® C

LK 840 ThermoMix® C

  • Click system for actuator

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.

LK 840 ThermoMix® C

  • Variants
  • Detailed Information
  • Documentation
  • Videos
  • Questions & Answers

Variants

LK 840 C - Female Thread

LK 840 C - Female Thread 1 artikel

Article Dim. Kvs m³/h A mm B mm C mm D mm E mm F mm Weight (kg) Dimensional sketch Item List
181855 F ½" 0,6 80 40 64 20 27 71 0.7

181855

Dim. F ½"
Kvs m³/h 0,6
A mm 80
B mm 40
C mm 64
D mm 20
E mm 27
F mm 71
Weight (kg) 0.7
Dimensional sketch
Item list

Other dimensions on request.

LK 840 C - Male Thread

LK 840 C - Male Thread 1 artikel

Article Dim. Kvs m³/h A mm B mm C mm D mm E mm F mm Weight (kg) Dimensional sketch Item List
181868 M 1" 6,3 80 40 64 20 27 71 0.7

181868

Dim. M 1"
Kvs m³/h 6,3
A mm 80
B mm 40
C mm 64
D mm 20
E mm 27
F mm 71
Weight (kg) 0.7
Dimensional sketch
Item list

Other dimensions on request.

LK 840 C - Compression fitting

LK 840 C - Compression fitting 3 variants

Article Dim. Kvs m³/h A mm B mm C mm D mm E mm F mm Weight (kg) Dimensional sketch Item List
181873 15 mm 2,5 114 57 81 20 27 71 0.8
181874 18 mm 2,5 114 57 81 20 27 71 0.8
181875 22 mm 2,5 114 57 81 20 27 71 0.8

181873

Dim. 15 mm
Kvs m³/h 2,5
A mm 114
B mm 57
C mm 81
D mm 20
E mm 27
F mm 71
Weight (kg) 0.8
Dimensional sketch
Item list

181874

Dim. 18 mm
Kvs m³/h 2,5
A mm 114
B mm 57
C mm 81
D mm 20
E mm 27
F mm 71
Weight (kg) 0.8
Dimensional sketch
Item list

181875

Dim. 22 mm
Kvs m³/h 2,5
A mm 114
B mm 57
C mm 81
D mm 20
E mm 27
F mm 71
Weight (kg) 0.8
Dimensional sketch
Item list
LK 940 C

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

066127

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

066128

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

*Other operation times on request.

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

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

Application

Wiring Diagram

Technical Diagrams

Valve Characteristics

Capacity Diagram

Documentation

Product sheet

LK 840 ThermoMix® C

Instruction manual

840 ThermoMix C - Instruction_148995

Certificate/Type approval

CE Declaration of Conformity - 830, 831, 840, 841, 842, 845, 846.pdf

Videos

LK 840 ThermoMix® C - Mounting of LK 940 C Motor

Questions & Answers

Is it possible to replace a Honeywell mixing valve with an LK 525 MultiZone with actuator?

Yes it is easy to replace and no adjustment is needed.