boost mode by activating input 2 of the heat pump with the relay. The heat pump
can also be switched from grid operator-blocked operation to normal operation
by activating input 1 of the heat pump with the relay. Information on the compat-
ibility of the heat pump with this control unit can be found in the operating in-
structions for the respective device.
Relatively small surpluses are consumed by the heating element in a continu-
ously variable manner. The heat pump should be activated above a certain sur-
plus output due to the higher efficiency. The average COP (coefficient of per-
formance) for water heating up to 53 °C is 2.5. This means that 1 kW of electrical
energy is converted into 2.5 kW of thermal energy.
The optimum switching times depend on the following factors:
-
Heat pump COP. The higher the temperature to which the hot water is
heated, the lower the COP.
-
The electrical heat pump output.
-
Feed-in tariff and the costs for purchasing energy.
-
Reduction of the heat pump's start-up cycles = increase in service life of the
heat pump.
-
Thermal losses from the heat pump and the pipes.
If no temperature sensor is fitted, the heat pump must ensure the minimum tem-
perature is met. As an alternative, the Ohmpilot can also ensure the minimum
temperature by activating the heat pump. This may result in electricity being
sourced from the grid. The maximum temperature must be set on the heating
element thermostat and on the heat pump. If the heating element does not have
a thermostat, the Ohmpilot can also carry out this task as an alternative (see
"Optional settings" section Optional settings on page 45).
This function can also be combined with a 3-phase heating element.
Settings in the
menu area
General settings, symbolic representation
27
To Next Page
Loading...
