EUROSTER 11W
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USER MANUAL
5
10 seconds for the setting to stop blinking.
Setting windows are numbered for convenient operation of the controller.
The user can change the following parameters:
1.
Boiler target temperature
It is the temperature of the boiler to be maintained by the controller.
2.
Hysteresis of the blower operation
This is a temperature range in which the controller linearly adjusts the blower power.
The narrower the temperature range, the smaller the system temperature fluctuations.
However, a too narrow range may result in the temperature oscillation
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the controller
will alternately heat up and cool down the boiler.
At the time of installation, set the maximum hysteresis value. Then wait for the system
to reach the preset temperature. If, under such conditions, the blower operates at a
power level between settings No. (3) and (4), the hysteresis may be reduced.
3.
Minimum power of the blower
This is the lowest power at which the blower may operate. It should be set at minimum
value at which the blower rotor starts to rotate. This value should be selected
experimentally using the blower test function (setting No. 11).
4.
Maximum power of the blower
This is the highest power at which the blower may operate. The value should be
selected experimentally so that the boiler temperature maintained by the controller is
as close to the preset temperature as possible.
5.
Blow-through time
This is a period of the blower operation in the blow-through mode. The blower is turned
on in order to remove combustion gases from the boiler. The blow-through time should
be long enough to effectively exhaust the gases via the stack and short enough to
prevent the boiler temperature rise.
6.
Time interval between successive blow-throughs
This is the time passing between the end of the blow-through cycle and the start of a
new cycle. It should be set so that to prevent the boiler temperature rise, but on the
other hand to avoid explosive combustion of the gases generated in the boiler.
7.
CH pump operation temperature
The conditions of turning the pump on and off are specified in section 12.
8.
CH pump hysteresis
This is a differential temperature at which the controller turns the pump on and off.
The conditions of turning the pump on and off are specified in section 12.
9.
Temperature readings correction
This is a value added to or subtracted from the measured temperature value. It enables
to compensate for the difference in readings between the sensor placed on the pipe and
the thermometer installed on the boiler.
10.
Shutdown temperature
This is a temperature below which the controller turns the boiler off (the boiler furnace
is most probably shut down). A too high shutdown temperature preset may cause the
controller to turn the boiler off by mistake.
11.
Blower operation / test
Displays the current status of the blower calculated by the controller (0-100 %).
Press the knob to activate testing of the output. Press the knob again or leave it
inactive for 10 seconds to resume automatic operation.
12.
Pump operation / test
Displays the current status of the pump calculated by the controller (0 or 1).
Press the knob to activate testing of the output. Press the knob again or leave it
inactive for 10 seconds to resume automatic operation.
ATTENTION: In case the set values preclude the correct operation of the controller,
the alarm icon will appear on the display, and the colliding settings will be displayed
alternately. After a few seconds the last correct configuration is restored.