Safety instructions
Electrical equipment must only be installed
and assembled by a qualified electrician in
accordance with the relevant installation stan-
dards, regulations, directives and safety and
accident prevention directives of the country.
The device has radio interference suppressi-
on according to VDE 0875 and EN 60730 and
works according to the 1C procedure.
Failure to comply with these instructions may
result in damage to the device, fire, or other
hazards.
These instructions are an integral component
of the product, and must be retained by the
end user.
(1)
(2)
(4)
(5)
(6)
(3)
Figure 1: Design of the device
Figure 2: Display and operating elements
Design of the device
Figure 1
(1) Insert
(2) Frame (not in scope of delivery)
(3) Centre plate with scale
(4) Fixing screw
(5) Setting knob
(6) Rocker for on/off switch
Figure 2
(7) Green control LED, night lowering
(8) Red control LED, heating
(9) On/off switch
(10) Adjusting wheels for temperature limitation
Function
Correct use
- Only suitable for use in indoor areas
- Installation in wall box according to DIN 49075
The thermostat is used to control electrically-con-
trolled underfloor heating and floor temperature
systems.
The thermostat for underfloor heating consists of
a control device and an external temperature
sensor.
- External temperature sensor to measure the
temperature in the floor
- Control device to set the desired setpoint
If the floor temperature falls below the setpoint,
then the bi-metal contact closes the heating cir-
cuit. The contact remains closed until the desired
temperature has been reached. The Control LED
(8) lights up.
In the position, the on/off switch (9) com-
pletely deactivates the control of the thermo-
stat.
If the temperature sensor fails or short-cir-
cuits, the heating circuit is interrupted.
Temperature lowering :
The time-controlled change-over from the day to
night temperature can be carried out using an
external timer. In so doing, the set temperature is
reduced by approx. 5 °C. If temperature lowering
is active, the control LED (7) lights up.
Operation
Setting the floor temperature
The scale is used for visual orientation when set-
ting the temperature.
Number
1
2
3
4
5
Temperature [°C]
approx.
10
20
30
40
50
Table 1: Temperature values according to scale
<
Using the setting knob (5), you can set the
floor temperature infinitely according to the
scale on the centre plate.
Limiting the temperature range
(11)
(12)
(13)
Figure 3: Adjusting wheels for temperature limita-
tion (as-delivered state)
The thermostat possesses two adjusting wheels
to limit the temperature range:
- Red adjusting wheel (11): upper temperature
limit, approx. 50 °C
- Blue adjusting wheel (13): lower temperature
limit, approx. 10 °C
<
Set the setting knob (5) roughly in the centre
of the desired setting range.
<
Pull the setting knob.
<
Carefully pull the locking pin (12) out a few
millimetres.
The adjusting wheels can be moved easily.
<
In a counter-clockwise direction, turn the red
adjusting wheel (11) to the desired maximum
temperature (Table 1).
<
In a clockwise direction, turn the blue adju-
sting wheel (13) to the desired minimum tem-
perature (Table 1).
<
Push the locking pin up to the stop.
The adjusting wheels are locked again.
<
Slip the setting knob on.
The floor temperature can be set within the
set limit range.
In an as-delivered state, the maximum setting
range of the thermostat (+10 ... +50 °C) is
enabled.
It is not necessary to switch the mains voltage
off to limit the temperature range.
Information for
electricians
Installation and electrical connection
DANGER!
Electrical shock when live parts are
touched.
An electric shock can be lethal.
Disconnect the connecting cables before
working on the device and cover all live
parts in the area!
Connecting and installing the device
L
N
F
F
L
N
Figure 4: Thermostat connection diagram,
NO contact, for underfloor heating
L
Live conductor
N
Neutral conductor
F
External temperature sensor, neutral pole
Temperature lowering
Load connection, heating
Installing the temperature sensor
<
Pass the temperature sensor in the protection
tube between two heating loops in the floor.
<
Close the protection tube as protection
against the ingress of moisture and dirt.
An extension of the connection cable of the
temperature is only approved with doubled
insulation, in accordance with EN 60730-2-1.
Installing the thermostat
<
Connect the controller according to connec-
tion diagram (Figure 4).
<
Plug the rocker (6) into the top acceptance
slot of the on/off switch.
<
Place the centre plate (3) over the design fra-
me (2) in the correct position and fix with the
fastening screw (4).
<
Slip the setting knob (5) on.
There is mains voltage on the temperature
sensor during operation.
Do not exceed an approved relative humidity
of max. 95%. Avoid condensation.
Appendix
Technical data
Thermostats
Operating voltage
AC-1 230 V~
Rated frequency
50 Hz
Switching current
16 (2) A
Temperature setting range
- Floor
+10 ... +50 °C
- Room
+5 ... +30 °C
Ambient temperature
0 ... +40 °C
Storage temperature
-20 ... +70 °C
Hysteresis
< 1 K
Night lowering
approx. 5 °C
Output
Relay, 1 S
Relative humidity
0 ... 95 % (without
condensation)
Protection class
II
(for complete installation)
Protection type
IP 30
Screw terminal connections
- Single-stranded
0.5 ... 2.5 mm²
- Finely-stranded with
0.5 ... 2.5 mm²
conductor sleeve
External temperature sensor according to
DIN 44574
Cable length
approx. 4 m
- extendable with 0.5 mm²
max. 50 m
(only with double insulation)
Sensor head (length x Ø)
approx. 28 x 7.7 mm
Type
NTC, HF-8/4-K2
Temperature
[°C]
Resistance
[kΩ]
10
3.66
20
2.43
25
2.00
30
1.65
40
1.15
50
0.82
Table 2: Characteristic sensor values
The resistance values can only be measured
when the sensor is disconnected.
Warranty
We reserve the right to make technical and for-
mal changes to the product in the interest of tech-
nical progress.
Our products are under warranty within the scope
of the statutory regulations.
If you have a warranty claim, please contact the
point of sale or ship the device on postage-free
basis with a description of the fault to our Service
Centre.
Berker GmbH & Co. KG
Service-Center
Hubertusstrasse 17
D-57482 Wenden-Ottfingen
Phone: 0 23 55 / 90 5-0
Fax: 0 23 55 / 90 5-111
