ensto ECO16FR Operating Instruction page 14

2.2 Connect the earthing wires (PE) to the separate additional connector.
2.3 Connect the thermostat to the mains and load according pictures 1 and 2 (spring
connectors, stripping length 9 mm). Connect the sensor cable to the sensor marked
connector and the control of temperature change to ∆T- marked connector. Any phase
can be used to control the temperature change.
The conductors can be disconnected from spring connectors by twisting and pulling at
the same time. In fl oor or ceiling heating installations a residual circuit breaker has to
be used according to the local installation regulations.
2.4 Mount the thermostat into the mounting box with screws.
2.5 Mount the thermostat lid, cover plate and adjustment knob. Cover the thermostat
from potential dust during construction.
3. START-UP AND OPERATION, pic 3, 5 ... 9
3.1 Adjust the type of heating control mode from the adjustment screw E (pic 3).
In 'fl oor'-mode heating is controlled by fl oor temperature and the fl oor temperature
setting is defi ned with the adjustment knob F (pic 5). In 'room'-mode heating is
controlled by room temperature (fl oor sensor is not needed) and the room temperature
setting is defi ned with the adjustment knob F.
When the adjustment screw E is turned to 'fl oor' or 'room'-mode the blue signal light C
blinks once to indicate the change of control mode. Between these two control-modes
heating is controlled by the room temperature and the position of the adjustment
screw E defi nes the maximum temperature of the fl oor. If the temperature of the fl oor
rises too high, the blue signal light C blinks four times in a minute for warning and the
load is switched off until the temperature is low enough. This control mode is designed
for secure protection of wooden fl oors (pic. 6). Many fl oor manufacturers suggest a
maximum temperature of 27°C for wooden fl oors.
3.2 NOTE!! The fl oor sensor measures only the temperature of concrete. Temperatures
of the surface materials are usually about 5°C lower than temperature of concrete
so the limitation can be set to approximately +32°C. The limitation is recommended
to be set to lower value fi rst and be raised later if the room temperature is too low.
Each fl ooring material is unique so when accurate temperature limit is needed the
temperature should be checked by a separate thermometer.
3.3 Adjust the desired remote controlled temperature change from the adjustment
screw D (pic 3). The change can be either positive or negative. Depending on the
control mode chosen by the screw E the temperature change affects straight to the
temperature setting. The temperature change is activated by external control voltage
and the change is indicated by the blue signal light C.
3.4 The adjustment range can be limited with the limiters of the adjustment knob (pic 8).
3.5 Mount the adjustment knob and switch on the heating from the switch A (pic 3). The
signal light B is green when the thermostat is functioning and it turns red when the
load is connected. While measuring the room temperature it takes several hours until
the thermostat is adapted to the current conditions and accurate functioning begins.
3.6 Check the temperature setting after 24 hours and calibrate the adjustment knob
to match the real temperature if needed (pic 9). Remove the temperature adjustment
knob and shaft without changing the temperature setting. Pull the knob out from the
teething of the shaft.
Put the shaft to the original position and set the adjustment knob to the teething so
that the knob indicates the real room temperature. Set the desired temperature.
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