LK 421 Manifold Shunt
TECHNICAL DATA
Max. operating pressure
Max. pressure differential
in operation
Operational temperature
secondary
Operational temperature
primary
Ambient temperature
Circulation pump
Voltage
Output
Current
Cable protection class
Relative humidity
Max. valve capacity control
valve V1 with hand actuator fitted.
Max. valve capacity control
valve V1 with electric valve actuator.
Control valve V2
Material
Media
Approved pump
1.
Supply flow from primary circuit. Female threads ¾".
2.
Locking control valve. Used to close the primary side, see
heading, Shutting off primary side.
3.
Return flow connection to primary circuit. Female threads ¾".
4.
Isolation/flow control valve primary return (V2). Valve for
adjustment and control of the primary flow. Also used as iso-
lation valve. 8 mm hexagonal socket.
5.
Return flow from the underfloor heating circuit. Male threads
1".
6.
Built-in thermometers located in the underfloor heating return
flow.
7.
Bracket.
8.
VF Valve (VF). Should only be used in installations with low
available drive pressure from the primary side of the circula-
tion pump. 8 mm hexagonal socket.
9.
Built-in check valve.
10. Pump connector.
1.0 MPa
0.1 Mpa
+12 - +65 ºC
Max. +80 ºC
Max. +70 ºC
Grundfos UPM3 Auto 15-70,
with cast iron pump housing
1 phase 230V AC, -15 %/
+10 %, 50 Hz, PE
Max. 52 W
Max. 0.52 A
IP44
Max. 95%
Kv 2.2
Kv 3.6
Kvs 4,1
Nickel-plated brass MS58,
stainless acid-proof steel
Water, water/glycol 50/50%,
water/ethanol 70/30%
CE, EC Low Voltage Directive
(2006/95/ EC) incl. additions
www.lkarmatur.com
11. Supply flow to underfloor heating circuit. Male threads 1".
12. Circulation pump Grundfos UPM3 Auto 15-70 with automatic
speed control.
13. Temperature limiter (TEMP). Factory-set to 50 °C.
Adjustable between 22 - 65 °C, see table.
14. Built-in thermometers located in the underfloor heating supply flow
15. Two-way control valve (V1). The control valve is fitted with a
hand actuator to manually adjust the supply flow temperature.
The valve is also used to close the primary side, see heading, Shutting
off primary side.
11
10
9
8
7
6
5
4
3
2
12
13
14
15
1
1