Selection Of Heater; 1-Phase Heater; Example For Calculation Of Charging Time - Fronius Ohmpilot Bedienungsanleitung

Selection of Heater

1-Phase -
Heater: -
3-Phase -
Heater: -
-
-
-
Example for
500-litre boiler, heater can be fitted at the very bottom of the boiler, temperature spread
Calculation of
45 - 60 °C = 15 °C; 4.5 kW heater
Charging Time:
Possible stored energy = 0.5 m³ x 1.16 kWh x 15 °C = 8.7 kWh
If the heater is fully activated, heating up takes approximately 2 hours (8.7 kWh / 4.5 kW)
66
0.3 to 3 kW
Purely resistive load (no electronic temperature limiters, fans, etc.)
0.9 to 9 kW
Equal load distribution on all 3 phases (e.g. 3 x 3 kW)
If a mechanical temperature switch is being used, it must switch all 3 phases
simultaneously.
Purely resistive load (no electronic temperature limiters, fans, etc.)
Neutral conductor must be implemented (this can generally also be retrofitted)
NOTE! A mechanical temperature switch simplifies commissioning and use. If
no mechanical temperature switch is available, a temperature sensor can also
be connected to the Ohmpilot in order to limit the maximum temperature. (See
"Temperature limitation")
NOTE! So that optimal use can be made of the surplus power and the hot wa-
ter is reheated quickly, the heater output should be adapted to the output of the
photovoltaic system, e.g. 5 kWp => 4.5 kW heater.