Shunt Group

LK 421 Manifold Shunt

•

Suitable for left-hand and right-hand mounting

P (kPa)

70

60

50

40

30

20

10

V1

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 require-

ments 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 al-

lows 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 auto-

matic 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

Max. working pressure

0.6 MPa (6 bar)

Max. differential pressure

0.1 MPa (1 bar)

Working temperature

Primary: Min. 5 °C/Max. 90 °C

Secondary: Min. 30 °C/Max. 65 °C

Ambient temperature

Max. 70 °C

Thread standard

Rp - female thread,

G - male thread

Protection type

IP44

Media

Water - Glycol mixture max. 50%

Ethanol mixture max. 30%

Circulating pump

Grundfos UPM3 AUTO 15-70

Material valve body

Nickel-plated Brass EN 12165

CW617N

Max Valve capacity

Control valve V1: With hand actuator

fitted. Kv 2.2

With electric valve actuator: Kvs 3.6

Control valve V2: Kvs 4.1

Type approval certificate

Pump: CE, EC Low Voltage Directive

(2006/95/EC) incl. additions

PUMP CHARACTERISTICS

CONSTANT PRESSURE 1

Cp3

Cp2

Cp1

CC III

CC II

CCI

CONSTANT PRESSURE 2

CONSTANT PRESSURE 3MAX

CC MAX

VF

V2

154

0

0

5

10

15

20

25

30

35

40

Q (l/min)