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Thermotech underfloor heating system
Electric boiler 6 and 9 kW
ADVANTAGES
• Completely mounted on delivery
• Two power modes
• A small and compact design
FActs
product id 25406 25409 heating Element
6 kW 3 + 3 kW
9kW 4,5 + 4,5 kW Electricity 9,12 A
13,67 A fuse
10A
16A
rated current automatic earth capacity at 50W/m2 Max working pressure
400 V 3-phase
leak switch 120 m2
2,5 bar
40/0,03 A
fluid volume weight (empty) 6 L
34 kg
Circulation pump Grundfos UPS 15/60
connection Max water temp. Max environment 3/4” external thread +110°C temp. +40°C Expansion vessel Safety valve
8 L
3 bar
insulation 19 mm Armaflex Area of use
• Two mode thermostat
Thermotech 6 and 9 kW electric boiler is small and compact and delivered fully assembled for a quick and easy installation indoors.
• Safety thermostat
Product specification
The boiler has two power modes. Each mode is connected
and disconnected by a signal from a built-in thermostat.
The boiler is equipped with an automatic earth leak switch
for highest safety of the installation. Insulated with 19 mm
Armaflex.
Each boiler is equipped with:
• Circulation pump
Air vent
Automatic
• Manometer and thermometer
sizing
Recommended length of loops at different pipe dimensions
(required effect 50/m²):
Pipe dimension
17 x 2 mm
20 x 2 mm
Lenght of loops
(m)
Capacity (m2)
Max 85 m
at ∆T = 5ºC
Max 120 m2
Max 110 m
at ∆T = 5ºC
Max 120 m2
(at 50 W/m2)
(at 50 W/m2)
• Expansion vessel
• Safety valve
• Automatic earth leak switch
Phone: +46 (0)620 68 33 30, www.thermotech.eu
Thermotech Scandinavia AB fulfils the ISO standards for quality- and environment management.
IG702-1402
Thermotech Company Group
Certifierad
ISO 9001
ISO 14001
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Thermotech underfloor heating system
Installation guide 16
17
Electric boiler 6 and 9kW
13
11
3
10
4
5
9
6
8
18
12
7
15
1
14
2
Figure 1. The equipment of the electric boiler
Construction
Thermotech electric boiler is insulated with 19 mm Armaflex carpet. The boiler’s necessary equipment is built-in and
it is ready to work.
Components (see figure 1):
1. Connection flow
2. Connection return
3. Enclosure
4. Water container
5. Insulation
6. Electricity cartridge
7. Steering panel
8. Connection for electricity
9. Contactors - relays
10. Expansion vessel
11. Circulation pump
12. Safety valve
13. Automatic air vent
14. Refill- and tapping vent
15. Manual air vent (refilling)
16. Sensor for air in the system
17. Complete valve tube
18. Earth leak switch
Installation guide for electricians
The incoming power feed should be taken from below, through the intended hole, for good strain relief (see figure 3). Sizing of the connection cable and the electric installation
must be performed by an authorised electrician.
Installing the central room thermostat (figure 4)
The electric boiler can be equipped with a room thermostat which is placed a room where you want to control
the temperature for the entire building. The thermostat is
controlling the boiler’s operation by breaking the current
to the circulation pump, when desired room temperature
is reached. Thermostat, product ID’s: 20210-3 or 67260 are
suitable for this control.
Figure 4. Connection of room thermostat
Installing the electric boiler
The electric boiler has a rail of metal on the back for a simple installation. Mount the enclosed consol at the wall with
a suitable screw. For the smallest free distance around the
boiler (see figure 2).
Figure 2.
Free distance around
the electric boiler
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Figure 3. Incoming power feed and electric connection
A thermostat is installed instead of a jumper between the
clamps 5 and 4.
Circuit diagram
Electric boiler
20210-3
67260
5
2
1
4
1
4
N
2
Thermotech underfloor heating system
Installation guide 7
8
5
4
Electric boiler 6 and 9kW
Low voltage indicator (9) glows red when the voltage to
the boiler drops below 180 V and then turns off the heater
to protect the electronic components. When the voltage
comes back above 180 V again, the heater starts and the
indicator light goes off.
9
6
Overheating protection (4) ensures that the water never
boils by triggering a fuse for the heater. The fuse must be
reset manually.
2
1
3
Figure 5. Electric boiler's control panel.
Dimensions
Control panel
The electric boiler's control panel contains the following:
E
50
D
1. Thermometer and manometer for temperature and
pressure in the boiler.
2. Thermostat
B
3. ON/OFF buttons for heating stages 2 and 3.
4. Protection against overheating. Shuts off at about
100ºC.
A
5. Indicator of air in the heater.
15
6. ON/OFF button for heating stage 1.
7. Fuse 2.5 A.
C
D
8. Indicator that the electric boiler is operating.
9. Indicator for low voltage, 180 V.
By setting switch (6) to the ON position, the electric boiler
and heating stage 1 are activated. Switch (3) is used to allow
the start of heating stages 2 and 3, but also to switch off the
same stages during operation.
Using the thermostat knob (2) on the electric boiler's control panel you can set a specific temperature which the
electric boiler will endeavour to maintain all the time. The
temperature can be set between 20ºC and 90ºC. The recommended setting is 60ºC which is when the mark on the
knob is at 12 o'clock.
Figure 6. Dimensions.
Dimensions,
mm
A
B
C
D
E
330
930
290
100
65
Air indicator (5) indicates that air is present in the boiler
and that the immersion heater has stopped in order to protect it from overheating. As soon as the system is bled properly, the immersion heater lamp will go out and it will be
energized again.
We reserve the right to change products without prior notice. Please refer to www.thermotech.eu for the latest versions of products
and installation instructions. Any prices shown exclude VAT unless otherwise stated. No liability is accepted for any typographical
errors.
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www.thermotech.eu