P (kW) = Heat output in kilowatts |
t (°C) = Temperature of coolant in heater (in degrees centigrade) |
A = Commencement of starting (coolant temperature in heater must be less than 60 °C). |
F = Starting from control interval. |
1 = Start of full load operation. |
2 = Switchover from full to part load operation. |
3 = Switchover from part load operation to control interval. |
4 = End of control interval. |
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