1
LK 422 Manifold Shunt Tmax
Technical Data
Max. operating pressure
1.0 MPa
Max. pressure differential
in operation
0.1 Mpa
Operational temperature
secondary
+12 - +65 ºC
Operational temperature
primary
Max. +80 ºC
Ambient temperature
Max. +70 ºC
Circulation pump
Grundfos UPM3 Auto 15-70
with cast iron pump housing
Voltage
1 phase 230V AC, -15 %/
+10 %, 50 Hz, PE
Output
Max. 52 W
Current
Max. 0.52 A
Cable protection class
IP44
Relative humidity
Max. 95%
Control valve
Kvs 4,1
Material
Nickel-plated brass MS58,
stainless acid-proof steel
Media
Water, water/glycol 50/50%,
water/ethanol 70/30%
Approved pump
CE, EC Low Voltage
Directive (2006/95/ EC)
incl. additions
DESIGN
LK Manifold Shunt Tmax is used in systems with a main pump. The
shunt unit can be mounted directly to LK Manifold RF from the left
or right. The shunt unit is fi tted as standard with a constant
thermostat controlled feed temperature as well as an automatic
speed controlled pump for reduced energy consumption and quieter
operation. The guideline capacity of this shunt unit is
a maximum of 130 m2 fl oor heating surface. The
capacity is dependent on heat requirement, laying
procedure etc.
1. Supply pipe to the floor heating circuit
Male thread 1”
2. Thermometer
Accessory (not included), immersion thermometers 0-80°C.
3. Supply pipe from primary circuit
Ball valve with a 3/4” female thread.
4. Check valve
Built-in check valve cartridge.
5. Return pipe to the primary circuit
1
3
5 4
6
7
2
11
8
10
9
Connection to the primary circuit’s 3/4” female thread.
6. Control & isolation valve
Control & isolation valve to the primary circuit 8 mm hexagonal
socket.
7. Return pipe from the floor heating circuit
Male thread 1”.
8. Bracket
Accessory (not included).
9. VF Valve
Valve for adjustment and control of the primary flow, also used as
isolation valve. 8 mm hexagonal socket.
10. Thermostat for temperature control (TEMP)
Thermostat for controlling feed temperature.
11. Circulation pump
Circulation pump, Grundfos UPM3 Auto 15-70 with automatic speed
control.
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