Opop H4-D Series User Manual page 16

H4EKO-D
5. Manual mode
For user convenience, the controller is equipped with Manual mode. In this function, each operating device (fan, CH pump, DHW
pump, additional pump, valve) is switched on and off independently of each other and each active mixing valve can be closed,
opened or stopped in the given position.
Pressing the impulse controller will start the function of the selected device. The device will be operated by pressing the impulse
button. In addition, in the Fan output option the user has the option to set any fan speed.
6. Working modes, Pump modes
In this function, one of the four operating modes of the CH and DHW pump is activated according to the needs of the user.

House heating - In this option, the controller enters the House heating mode. The CH pump will start operating above
the pump switching temperature (factory set to 38 °C). Below this temperature (minus hysteresis 2 ° C), the pump stops
working.
Boiler (DHW) priority - In this mode, the DHW pump (DHW) is first turned on and operates until the set DHW temperature

has been reached. Once it is reached, the DHW pump is switched off and the CH pump is activated. The CH pump runs all
the time until the temperature of the DHW tank drops below the set temperature by the DHW hysteresis value. Then the
CH pump switches off and the DHW pump switches on (the pumps work alternately).
In this mode, the fan operation is limited by maximal DHW tank temperature to 62 °C to prevent overheating of the
DHW tank.

Parallel pumps
In this mode, both pumps start operating simultaneously when the pump switch on temperature is reached. This
temperature can be different for each pump, depending on the setting by the user. This means that one pump can be
switched on before the other, but when the two set temperature limits are exceeded, the pumps will work
simultaneously. The CH pump is operating continuously and the DHW pump switches off after the specified DHW
temperature has been reached; on the other hand, it will be switched on when the temperature falls below the setpoint
set by the set DHW hysteresis value.

Summer mode
In this option, the CH pump is switched off and the DHW pump switches on when the DHW set temperature is reached.
It will operate continuously until the temperature drops lower by the DHW hysteresis value or if this condition is met:
(boiler temperature) + 2 ° C ≤ (DHW temperature).
In the summer mode, only the set boiler temperature is set, which is also the specified DHW temperature.
7. Time settings
Select the current time so that the functions that work with the current time work correctly.
8. Date settings
Select the current date so that the functions that work with the current date work correctly.
9. Fitters menu
All accessories that are connected to the boiler are activated and adjusted here. For a description of the Fitters menu, refer to the
next chapter of this manual.
10. Language version
Use this function to select the language version of the controller.
11. Factory settings
It is possible to return to the factory setting values. By selecting the factory setting, the boiler settings set by the user are deleted.
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User manual