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LK 421 Manifold Shunt

LK 421 Manifold Shunt

  • Suitable for left-hand and right-hand mounting

LK 421 is to be used in systems with main pump in the primary circuit. Its capacity can be set at a flat rate of heating requirements of 50W/m² to max 200 m² of floor heating surface. The capacity is dependent ...

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LK 421 Manifold Shunt

  • Variants
  • Detailed Information
  • Documentation
  • Accessories & Spare parts

Variants

LK 421 - Female thread / Male thread

LK 421 - Female thread / Male thread 2 variants

Article Dim. Weight (kg) Item List
296995 F ¾” / M 1” 4.6
298559 F ¾” / M 1” 4.6

296995

Dim. F ¾” / M 1”
Weight (kg) 4.6
Item list

298559

Dim. F ¾” / M 1”
Weight (kg) 4.6
Item list

Dimension = Prim. / Sec. connection

Detailed Information

Description

LK 421 is to be used in systems with main pump in the primary circuit. Its capacity can be set at a flat rate of heating requirements of 50W/m² to max 200 m² of floor heating surface. The capacity is dependent on the primary temperature, pressure, floor heating installing system, etc. The included supply pipe allows in both left- and righthand assembly to LK 430 Manifold RF.

The shunt unit is a complete pre-manufactured unit.

Items Included:
• Circulation pump Grundfos UPM3 Auto 15-70 130, with automatic speed control, 1 phase 230 V AC 50 Hz, max 45 W, 0.38 A
• Two way control valve Kvs value 2.5, equipped with hand actuator
• VF valve
• Temperature limiter of feed temperature
• Adjustment valve for the primary circuit
• Check valve
• 2 tube thermometers
• Isolation valves for primary circuit
• Fixing bracket

Technical Data

Voltage: 1 phase 230V AC, -15 %/+10 %, 50 Hz , PE
Power consumption: Max. 52 W
Working temperature: Primary: Min. 5 °C/Max. 90 °C
Secondary: Min. 30 °C/Max. 65 °C
Ambient temperature: Max. 70 °C
Max. working pressure: 0.6 MPa (6 bar)
Max. differential pressure: 0.1 MPa (1 bar)
Media 1: Water - Glycol mixture max. 50% Ethanol mixture max. 30%
Thread standard: Rp - female thread, G - male thread
Circulating pumps: Grundfos UPM3 AUTO 15-70
Protection type: IP44
Material, valve body: Nickel-plated Brass EN 12165 CW617N
Other data: Max. valve capacity control valve V1 with hand actuator fitted. Kv 2.2
Max. valve capacity control valve V1 with electric valve actuator. Kvs 3.6
Control valve V2 Kvs 4.1
Approved pump CE, EC Low Voltage Directive (2006/95/EC) incl. additions

Application

Technical Diagrams

Pump Characteristics

Documentation

Product sheet

LK 421 Manifold Shunt

Instruction manual

421 Manifold shunt 2_0 - Instruction_296995

Brochure

Underfloor heating ENG

Accessories & Spare parts

Article no. Article Position
187172 Circulating pump Grundfos UPM3 Auto 15/70 1
095018 Thermometer T40, 0 - 80 °C 2
095221 Bracket 3