LK 241 84 64 User manual
LK Electric Portable Boiler comprises of:
1. Electrically-heated boiler, 9 kW
2. Control box
3. Expansion tank, 12 litres
4. Safety valve, 1.5 bar
5. Pressure gauge
6. Automatic air-bleed valve
7. Circulation pump, Grundfos UPM3 Auto
15-70
8. Steel-reinforced connection hose 1”, length
1.0 m
9. Cable with 3-phase coupling connector,
length 1.0 m
10. Operating thermostat, 0-60 ºC
11. Multipolar main switch
12. Trip switch, overheating protection, under
the middle plastic screw with the red O-
ring.
13. Power amplication indication
456
1
2
3
7
9
8
01
20
30
40
50
60
C° 4,5 kW 4,5 kW
<80˚
RESET
10
11
12
2
13
Structure
The LK Electric Portable Boiler is a complete
portable electrically-heated boiler. It is primarily
meant to be used as a temporary heater, e.g. for
drying concrete slabs installed with under oor
heating and for heating buildings under construc-
tion installed with a under oor heating system.
The boiler has a total output capacity of 9 kW
and it works in two steps of 4.5 kW.
The boiler is supplied complete with a circulation
pump, an expansion tank, and auxiliary devices
including a safety valve and air-bleed valve.
Connection to the under oor heating manifold/
heating system is simple, using steel-reinforced
exible hoses.
The boiler is factory wired and complete with a
3-phase 400 V electric plug.
Temperature regulation is controlled by the
boiler’s operating thermostat.
LK Electric Portable Boiler
EN.33.C.39.2022-01-14
Assembly instructions | LK Electric Portable Boiler
1 (3)
English
EN.33.C.39.2022-01-14
Assembly instructions | LK Electric Portable Boiler
a blunt chisel e.g. TX10 or H2.5 when resetting
In the event of a repeated overheating, determine
the cause of the fault and x it before restarting.
Before restarting the boiler
• Check that the pump can rotate by turning
the rotor with a screwdriver in the center
hole of the pump.
• Check that the overheating protection is not
tripped. Press the RESET-button (12) under
the middle plastic screw with the red O-ring.
• Check that the boiler is water-lled and well
vented.
Circulation Pump
For setting up the circulation pump, see separate
instruction ”Grundfos UPM3 Auto 15/70”. Note
that the pump is advantageously set to work with
constant pressure and that this must be set manu-
ally according to separate instructions.
QR code for assembly instruction UPM3
Alarm codes
In the event of an operating problem then a fault
code will be displayed as below.
Foult codes circulation pump
Display Indication Operation Action
Red LED,
Yellow LED
#5
Blocked
rotor
False start
was 1.33 s.
Wait or
release rotor/
impellerr*
Red LED,
Yellow LED
#4
Too low
voltage
Only one
warning, the
pump oper-
ates as normal
Check the
voltage to the
pump
Red LED,
Yellow LED
#3
Electric
fault
Pump stops
because of
low voltage or
serious fault
Check voltage
to pump / Re-
place pump/
impeller
*Release impeller using screwdriver PH2. Break the
voltage to the pump. Insert the screwdriver into the
center hole of the drive side, press the screwdriver in
about 5 mm, then rotate forward /backward until the
impeller loosens.
Installation
The boiler should be placed indoors/under a roof
and fully protected from rain. The integrated
safety package including automatic air-bleed
valve, safety valve and connecting hoses, must
be installed as shown in the product diagram (see
above). Relevant building standards and hot wa-
ter installation standards must be adhered to.
The safety valve’s outlet’s functioning must be
ensured in the appropriate manner; refer to cur-
rent hot water installation standards. No thermo-
meter is included in the standard kit. However, a
thermometer should be mounted on the pipe after
the boiler. The heating system must be arranged
so that there is always a ow through the elec-
trical cartridge. Check to see that one or more of
the heating loops are always open.
Switching on
Before switching on, check to see that the hea-
ting system is lled with water, air-bled and that
the system’s operating pressure is sucient.
Check to see that the circulation pump is run-
ning by listening to and testing the various pump
speed settings.
Thermostat operation
Temperature regulation is via the boiler’s opera-
tional thermostat (constant output temperature).
The thermostat can be set up to a maximum of 60
ºC. Monitor the output temperature by means of
a thermometer and compare it to the set tempera-
ture.
Overheating protection
Note!
Resetting is possible after the boiler has
cooled down to approx. 65 ºC.
The boiler is provided with built in overheating
protection, which cuts o the power at approx.
80 ºC and att temperatures < −5 ºC. To reset the
overheating protection function, press the RE-
SET-button (12) under the middle plastic screw
with the red O-ring. Press the button hard with
2 (3)
English
EN.33.C.39.2022-01-14
Assembly instructions | LK Electric Portable Boiler
Technical data
Article no. 241 84 64
Output 9 kW in two stages at 4.5 kW
Voltage 3 N~ 400V AC, connection via
3-phase electric plug
Boiler must be protected using
3 x 16 A fuses (max. current
13.5 A)
Electrical cartridge 9 kW/6-tube 400 V, stainless
steel SS2353, connection 2”
Pump Grundfos UPM3 Auto 15-70 1
phase 230V AC (factory tted
to control box)
Protection class IP 44
Input power circulator 5-52 W
Operating thermostat Max 60 ºC
Safety thermostat 80 ºC
Expansion tank 12 litres
Safety valve 1,5 bar
Max. glycol solution 30%
Boiler volume 2,8 litres
PS max. pressure for
boiler jacket
1,5 bar
Dimensions (L x W x H) 710 x 430 x 650 mm
Weight 23 kg
Condensing boiler No
Low-temperature boiler No
B1 boiler No
Cogeneration space
heater
No
Rated heat output Pmärk 9 kW
Useful heat output Pmärk 9 kW
Energy class D
Seasonal space heating
energy eciency
ηs36%
Useful eciency ηs39.4%
Auxiliary electricity
consumption
On standby PSB 0.025 kW
Standing loss Pstby 0.101 kW
Recycling
The boiler should be recycled after dismantling.
Insulation is removed and sorted as insulation.
The boiler body and stand should be sorted as
scrap steel. Electronics and electronic compo-
nents should be sorted as electrical scrap.
Safety valve
The safety valve must be tested at start-up and
then at set intervals 2-3 times per year. CAU-
TION: Take care when testing as the out-owing
water/steam can cause scald injuries.
Pump graph
Electric connection diagram
LK Systems AB, Box 66, 161 26 Bromma, Sweden | www.lksystems.se
3 (3)
English
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