LK Systems Minishunt M60 User manual

1 (8)
temperature is achieved to the radiators.
Shutting-off against the return connection
of the primary side is achieved by turning
closed the outer and then the inner hex-
screw spindle.
3. Thermostat with capillary tube connected
sensor, length 2 m.
4. Feed connection from the primary side, ¾”
male EuroCone. Connectors for 15 mm Cu
are supplied.
5. Return connection to the primary side, ¾”
male EuroCone. Connectors for 15 mm Cu
are supplied.
6. Temperature limiter. Maximum limiter of
the feed temperature to the under oor
heating.
7. Return valve (dim. 8 mm hex.).
8. Connection ½” female thread for system
rell upon installation.
9. Ventilation valve with hose nipple.
10. VF valve (dim. 8 mm hex.). Must only be
used for installations with low available
drive pressure from the circulation pump of
the primary side.
11. Circulation pump, Wilo Yonos Para
RSB15/6-RKA with automatic speed con-
trol.
12. Connection feed oor heating ½” female
thread.
13. Connection return oor heating ½” female
thread.
14. Bracket
12
13
11
8
7
5
4
2
1
3
10
9
614
Design
The LK Minishunt M60 is intended for use in
smaller under oor heating areas (up to 60 m² de-
pending on heating requirements/laying proce-
dures etc.) and is connected to an existing heating
system. The shunt unit consists of an automatic
speed-controlled circulation pump for the under
oor heating circuit, a maximum limit function
for the feed temperature, a return valve for the
under oor heating circuit, a ll/discharge and
air bleed valve plus a thermostatic valve unit, t-
ted with a thermostat and a sensor, connected to
a capillary tube.
Connectors for a under oor heating circuit and
mini manifolds for 2, 3 or 4 under oor heating
circuits are provided as accessories. Possible pipe
connections for oor heating are dim. 8, 12, 16
and 20 mm. The installation can be concealed in
built-in or wall-mounted cabinets, see heading
Installation cabinets.
1. Thermostat valve.
2. Switching between single or twin pipe
radiator systems and shutting-off against
the return connection of the primary side.
When delivered, the minishunt is set for a
twin pipe radiator system with the outer
hex-screw spindle (dim. 10 mm hex.) scre-
wed in and the inner hex-screw spindle
(dim. 4 mm hex.) screwed out. For single
pipe systems the outer hex-screw spindle is
gradually screwed out until correct
LK Minishunt M60
EN.33.C.134.1512
Assembly instructions | LK Minishunt M60

2 (8)
EN.33.C.134.1512
Assembly instructions | LK Minishunt M60
Assembly
32 mm
7 mm
PE
L
N
Click!
Disassembly
1
2
3
Function & requirements
In order for the correct operation of the LK Mi-
nishunt M60/under oor heating system, the
existing heating system must be tted with a
circulation pump and preferably with a weather
dependent ow temperature control. With the LK
Minishunt M60 the temperature of the heating
system is adapted to the lower temperature that
is required by the under oor heating circuit. Pri-
or to assembly, the heating system must be us-
hed through and must not contain any impurities
or additives, which can damage the shunt.
Assembly
The LK Minishunt M60 must be mounted at a hig-
her level than the under oor heating installation
in order to assist air bleeding. Pay attention to any
structure-borne noise from the minishunt when
placing it. The shunt should preferably be place
in specially designed cabinet to full Sweden’s
plumbing safety regulations, see heading Instal-
lation cabinets.
Pipe connection
The minishunt´s primary connection is provided
with a ¾” EuroCone thread. Pipe connection to
the primary side is made using the enclosed t-
tings for 15 mm Cu Connectors for Cu 12 mm
and to PEX-/PAL pipes dimension 16x2, 20x2
and 20x2, 8 mm are available as accessories. The
secondary connections of the minishunt have ½”
female thread. The under oor heating pipes are
connected for a oor heating circuit using LK
Connection Coupling ½” male thread for pipe
dim. 8,12,16 or 20 mm. For more circuits, LK Mini
Manifold 2, 3 or 4 circuits for pipe dim. 8, 12, 16
or 20 mm, are available.
Electrical connection of circulation pump
Electrical connection of the pump must be carried
out by a qualied electrician in accordance with
applicable regulations. The pump is equipped
with a xed 3-core cable and Wilo-connector with
integrated strain relief. The Wilo-connector repla-
ces the requirements for 2-pole circuit breaker.
Connect the supply cable L, N, PE to the Wilo-
connector according to the following sequence.
The electrical connection must be fused with Max
10 A slow blow fuse. Note that at any maintenan-
ce/repair work the pump power supply must be
disconnected. Motor protection for the circula-
tion pump is not required.

3 (8)
EN.33.C.134.1512
Assembly instructions | LK Minishunt M60
Assembly of LK Actuator
Wireless or wired electronic room control for
LK Minishunt M60 are available as accessories.
The enclosed thermostat with capillary tube con-
nected sensor is then replaced with an electric
LK Actuator and is installed according to the se-
quence below.
Click!
Assembly of supplied thermostat
To install the supplied thermostat with capillary
tube connected sensor, dismantle the hand actua-
tor and the black threaded adapter according to
the sequence below. The capillary tube connected
sensor is preferably placed on a interior wall. As
accessory a thermostat with 5 m capillary tube,
alternatively LK’s electronic wired or wireless
room control can be used.

4 (8)
EN.33.C.134.1512
Assembly instructions | LK Minishunt M60
Start up
Air bleeding
Flush through the system with hydraulic pres-
sure in order to air bleed it and remove any
impurities as follows:
• Close against the primary side using the
thermostat valve (3).
• Screw both hex-screw spindles to closed
position for the valve (2).
• Next, close the return valve (7).
• Assemble the hose connection (8).
• Flush the oor heating side via connection
(8) and air bleed/drain through (9) until the
water runs clear.
• Close the ventilation valve (9) and disassem-
ble the hose connection.
• Reset (2) and (3) whereupon the primary side
can be switched on.
• Air from the primary side can now be bled
out via air vent (9).
• Open the return valve (7).
• Start the circulation pump and use the
pump´s automatic venting routine to remove
accumulated air in the pump. See heading
Circulation pump.
Adjustment
As the LK Minishunt M60 is intended for con-
nection to existing heating systems, the availa-
ble drive pressure and ow on the primary side
are often unknown. Without this information the
theoretical adjustment values of the minishunt
cannot be calculated. In this case, adjustment
should be carried out as described below.
If the available drive pressure and ow on the
primary side are known, the theoretical adjust-
ment for the minishunt can be calculated, refer
to the project planning instructions for LK Floor
Heating.
1. Carry out air bleeding of the oor heating
system and the minishunt, as shown above.
Installation cabinets
To conceal the installation there are cabinets av-
ailable to be built-in or mounted on the wall. The
cabinet fulls Sweden’s plumbing safety regu-
lations. The cabinets are made of 1 mm powder
coated steel plate. The cabinet has a rigid base
complete with pipe entry-holes sealed by rubber
gaskets. The base of the cabinet is tted with an
outlet for leakage indication so that any leakage
water can be drained.
The cabinet is supplied complete with door and
frame. The hatch of the cabinet is tted as stan-
dard with a screwdriver lock. Lock and keys are
available as accessories.
LK Minishunt M60 assembled in LK Cabinet M60 WP.
Article no. Denomination Intended for
241 94 49 LK Cabinet M60 WP LK Minishunt M60
241 94 50 LK Cabinet M60
WP-XL
LK Minishunt M60 with
assembled LK Mini
Manifold or LK Heater
241 94 51 LK External Cabinet
M60 WP
LK Minishunt M60
241 94 52 LK External Cabinet
M60 WP-XL
LK Minishunt M60 with
assembled LK Mini
Manifold or LK Heater

5 (8)
EN.33.C.134.1512
Assembly instructions | LK Minishunt M60
Setting of the temperature limiter for the feed temperature
of the under oor heating.
Dial settings from open
position
Max. temperature
0,0 65 ºC
0,5 57 ºC
1,0 50 ºC
1,5 43 ºC
2,0 35 ºC
Setting of the thermostat with the capillary tube connec-
ted sensor.
Marking on thermostat Room temperature
1 8 ºC
2 14 ºC
3 20 ºC
4 26 ºC
5 32 ºC
Circulation pump
The circulation pump has automatic speed con-
trol, which reduces power consumption and gi-
ves a quieter operation as the pump adjusts the
ow according to the requirements of the system.
A cast arrow on the pump housing indicates the
direction of the ow. For under oor heating it
is recommended that the pump is set to constant
pressure control. Chose the constant pressure
curve that best matches the requirements of the
system, see capacity chart below. Ensure that the
pump never runs dry and the system is well ven-
ted before use. Use the pump´s automatic venting
routine at start up.
Setting the pump function selector
2. Start the pump. Upon start up, use the auto-
matic venting routine to remove accumula-
ted air in the pump. The automatic venting
routine starts after 3 seconds and proceeds
for 10 min. The venting routine is indicated
with a fast ashing green diode light. After
completing the venting process, the con-
stant pressure curve that best matches the
requirements of the system is chosen. See
capacity chart below.
3. Set the switch (2) for single or twin pipe
radiator systems (twin pipe radiator sys-
tem is factory set at delivery). For single
pipe systems the outer hex-screw spindle is
gradually screwed out until correct tempe-
rature is achieved to the radiators. The inner
hex-screw spindle must be screwed out.
For twin pipe systems the outer hex-screw
spindle (dim. 10 mm hex.) must be screwed
in and the inner hex-screw spindle (dim. 4
mm hex.) screwed out.
4. Set the primary temperature from the hea-
ting source to the minishunt to approx. 55
°C.
5. Set the temperature limiter (6) as given in
the table below. Normal setting is approx.
50 °C.
6. Set the thermostat (3) as given in the table
below.
7. Allow the system to stabilize for approx. 10
min.
8. The feed temperature should now be bet-
ween 35-45 °C.
• If the temperature is too low, see heading
Trouble shooting. Note that at start up a
system in an unheated concrete slab, can
take up to 24 hours before the feed tempe-
rature has reached the correct level.
• If the temperature is too high, adjust the
feed temperature using the temperature
limiter (6) as given in the table below.
9. Finish off by resetting the primary tempera-
ture to normal temperature.

6 (8)
EN.33.C.134.1512
Assembly instructions | LK Minishunt M60
Constant pressure curve
For under oor heating it is recommended that
the pump is set to constant pressure control. Se-
lect the constant pressure curve that best matches
the needs of the system, see capacity chart below.
Proportional pressure curve
Proportional pressure setting is normally not
used for oor heating.
Automatic venting routine
When the oor heating system is lled, ushed
and vented the circulation pump can be started.
At start up, use the pump´s automatic venting
routine to remove accumulated air in the pump´s
rotor chamber. The automatic venting routine
start after 3 seconds and lasts for 10 minutes.
Venting routine indicated by a fast ashing green
diode light. After complete venting, choose the
constant pressure curve that best matches the re-
quirements of the system, see capacity chart be-
low. If no choice is made, the pump operation au-
tomatically to switches to constant pressure with
max capacity.
Capacity chart
0,025 0,05 0,075 0,10 0,125 0,15 0,17 0,20 0,225 0,25 0,275 Q [l/s]
P
[kPa]
60
50
40
30
20
10
0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1,0
Q [m³/h]
H
[m]
6
5
4
3
2
1
Δp - c
6
5
4
3
1
2
Capacity chart LK Minishunt M60 with Wilo Yonos Para RSB 15/6-RKA.

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EN.33.C.134.1512
Assembly instructions | LK Minishunt M60
Technical data
Article no. 241 80 85
Max. operating pres-
sure
0,6 MPa
Operational tempera-
ture secondary
+12 - +63 ºC
Ambient temperature Max +35 ºC
Circulation pump Wilo Yonos Para RSB 15/6-RKA
Voltage 1 phase 230 V +10%/-15% 50/60
Hz, PE
Output Max 45 W
Current Max 0,44 A
Protection class IP X4D
Insulation class F
Valve capacity Kvs 1,12, with self-acting thermo-
stat Kv 0,51
Flow diagram
Diode indicator on the pump
Diode Meaning Note Action
Lights green Pump in operation. Normal operation.
Fast ashing green Pump is running venting routine
during 10 min. Then, the required
pump capacity must be set.
Venting routine active.
Flashes red/green The pump is ready for operation,
but will not start. The pump starts
automatically as soon as the error
is no longer present.
Under- or over-voltage
U<160 V, U>253 V.
Check the power supply
>195 V / <253 V.
Flashes red The pump is not working, pump
blocked.
The pump does not restart
automatically.
Check the pump housing,
if necessary replace the pump.
Diode not lit No power supply or damaged
electronics.
Check the power connection, cable
connection, if necessary replace
the pump.
Trouble shooting
The under floor heating circuit does not
get warm
• Check that the shut-off valves for (2) and the
return valve (7) are open.
• Check the setting on the maximum limiter
valve (6).
• Check the connection, operation and setting
of the circulation pump.
If the above adjustments have been performed
and there is still no heat reaching the under oor
heating circuit, this can be an indication of low
available drive pressure from the primary side.
Begin by checking that the circulation pump of
the primary side can be stepped up. If this does
not rectify the situation, the circulation pump of
the minishunt can help to ”draw” the water from
the primary side to the under oor heating side
by gradually closing (clockwise) the VF valve (10)
until the correct temperature has been achieved.
Return temperature of the under floor
heating circuit is too low
• Open the return valve (7).
• Increase the speed of the circulation pump
using the function selector.
The radiators after the minishunt do not get
warm for the single pipe radiator systems
The LK Minishunt M60 is supplied in the twin
pipe design. For the single pipe system, switching
will need to be carried out, see heading Start up/
Adjustment.
SV
P
AV/RV AV/
RV
Tmax
Primary side
with master
pump Secondary side
for underfloor
heating
2-1 Switch for single or twin
pipe radiator systems

8 (8)
EN.33.C.134.1512
Assembly instructions | LK Minishunt M60
Dimensions
99 54
180
102
8629 50
365
Dimension sketch for the LK Under Floor Heating with Minishunt M60
The table is based on a heat output of approx. 50 W/m² and an indoor temperature of 20 °C. The primary
temperature is calculated at 55 °C and with a oor temperature at approx. 40/33 °C. Under oor heating
systems 1-7 respectively 10-13 are calculated using 14 mm laminated parquet. Systems 8 and 9 are calcula-
ted using 22 mm laminated parquet.
5m210m215m220m225m230m235m240m245m250m255m260m2
1. Clip Rail 8 c/c 120
mm
1x43m 2x43m 3x43m 4x43m
2. Clip Rail 12 c/c
150 mm
1x35m 1x70m 2x53m 2x70m 3x58m 3x70m 4x61m 4x70m
3. Clip Rail 16 c/c
320 mm
1x17m 1x35m 1x52m 2x35m 2x44m 2x53m 3x41m 3x46m 3x53m 4x44m 4x48m
4. Clip Rail 16 c/c
240 mm
1x23m 1x46m 1x69m 2x46m 2x58m 2x69m 3x54m 3x61m 3x69m 4x58m 4x63m 4x69m
5. Clip Rail 16 c/c
160 mm
1x35m 1x70m 1x105m 2x70m 2x88m 3x70m 3x82m 3x93m 4x79m 4x88m 4x96m
6. Clip Rail 20 c/c
300 mm
1x19m 1x38m 1x57m 1x76m 2x48m 2x57m 2x67m 2x76m 3x57m 3x63 3x70m 3x76m
7. HeatFloor 22 pipe
dim. X16 c/c 200
mm
1x29m 1x57m 2x43m 2x57m 2x70m 3x57m 3x67m 3x76m 4x64m 4x70m 4x78m 4x85m
8. Floor Joist Plate
16 c/c 200 mm
1x29m 1x57m 2x43m 2x57m 3x48m 3x57m 4x50m 4x57m
9. Cross battening
with distribution
plate 16 c/c 200 mm
1x29m 1x57m 2x43m 2x57m 3x48m 3x57m 4x50m 4x57m
10. Floating oor
EPS 30 pipe dim.
X16 c/c 200 mm
1x29m 1x57m 1x85m 2x57m 2x70m 2x85m 3x67m 3x76m 4x64m 4x70m 4x78m 4x85m
11. Floating oor
EPS 50 pipe dim.
X16 c/c 200 mm
1x29m 1x57m 1x85m 2x57m 2x70m 2x85m 3x67m 3x76m 4x64m 4x70m 4x78m 4x85m
12. HeatFloor 22
XPE pipe dim. X16
c/c 200 mm
1x29m 1x57m 1x85m 2x57m 2x70m 2x85m 3x67m 3x76m 4x64m 4x70m 4x78m 4x85m
13. EPS 16 pipe
dim. 12 c/c 150
1x35m 1x70m 2x53m 2x70m 3x58m 3x70m 4x61m 4x70m
LK Systems AB, Box 66, 161 26 Bromma, Sweden | www.lksystems.se