Opop H4 EKO-D Series User Instructions page 18

H4EKO-D
the relevant parameters (similar to the main valve). The detailed setting of the additional valves is provided in the instructions
for the 431N module which allows the control of these additional valves.
3. Temperature reduction by thermostat – If the room thermostat is activated, this item can be used to adjust by how many
degrees the set CH temperature of the boiler should be reduced to reduce the boiler output or deactivate the fan to achieve
this reduced CH temperature.
4. GSM module – The GSM module is an additional device cooperating with the boiler controller, which enables remote control
of the boiler operation using a mobile phone. The user is notified by an SMS message about a possible boiler controller alarm
and by sending the corresponding SMS, the user is informed about the current temperature of all sensors. Once the
authorisation code is entered, it is also possible to remotely change the entered temperatures.
Refer to the GSM module instructions for detailed settings.
5. Internet module – Use of this operating mode is possible only after the purchase and connection of the S T-500 additional
control module, which is not part of the controller's standard equipment. An Internet module is a device that allows the user
to control the boiler's operation remotely over the Internet or the local network. The user checks the status of all installed
boiler components on the computer or telephone. The operation of each device is shown in the form of an animation.
Refer to the Internet module instructions for detailed settings.
6. Room thermostat – With this function the user can select the corresponding type of room controller. The user may select
between standard controller (traditional two-position) and OPOP/TECH (RT10) controller.
When the OPOP/TECH controller is connected, the user has the possibility to control and change the set CH, DHW and
mixing valve temperatures. All boiler controller alarms are also displayed. When working with the mixing valve, the user
can see the current outdoor temperature on the display panel with valve parameters.
ATTENTION: No external voltage must be connected to the outputs of the room controller. Otherwise, the controller may
be destroyed.
o
CH pump control – after the room controller signals heating, the CH pump is switched off.
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Boiler control – after the room controller signals reaching the heating temperature, the temperature
drops to the set temperature.
7. Operation algorithm – Activation or deactivation of PID mode. In PID mode, the boiler unit modulates the fan speed. The
closer the temperature is to the set temperature, the lower the speed of the fan. If the PID mode is deactivated, then the fan
only runs at a fixed speed without modulation. Once the CH temperature is reached, the fan is deactivated.
8. Parameters of the AKU tank – Heating of the accumulation tank is carried out by means of a temperature sensor inserted
into the sink in the buffer tank. If the buffer tank heating is activated, the corresponding temperature sensor must also be
connected, otherwise there will be an alarm message.
a. Set temperature – Enter the desired temperature in the buffer tank measured by the temperature sensor.
b. DHW function – If the hot water cylinder is connected to the system and this is controlled by the DHW pump
connected to the boiler unit, you can choose whether to use this DHW heating in the case of a heated buffer tank.
Depending on the hydraulic connection, we recommend consulting with the installer.
9. Pump switch-on temperature – This option is used to set the switch-on temperature of the CH pump (it is the temperature
measured at the water outlet from the boiler) and the DHW pump. The pump starts to work above this temperature. Pump
is switched off after the boiler temperature drops below the switch-on temperature (minus hysteresis 2°C).
10. DHW hysteresis – This option is used to set the hysteresis of the set DHW temperature. It is the maximum difference between
the set temperature (i.e., the selected DHW temperature at which the pump shuts off) and the temperature at which it starts
working again.
Example:
The set temperature is 55°C and the hysteresis is 5°C.
Upon reaching the set temperature of 55°C, the DHW pump is switched off and the CH pump is switched on.
When the temperature drops to 50°C, the DHW pump is switched on again.
11. Auxiliary pump – The user has the option of connecting an auxiliary pump: circulator or valve pump. Depending on the pump
selection, the settings need to be configured correctly.
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Instructions