Self-regulating open circuit pump unit

A method for controlling a device having an operable element in order to source a system load, the method comprising:

• determining control curve information for operation of the operable element of the device, the control curve information being dependent on at least a first parameter and a second parameter, the first parameter and the second parameter being correlated, the control curve information including:
• a) a first setpoint of both rated total value of the system load for the first parameter and rated total value of the system load for the second parameter, and
• b) a second setpoint of both a minimum partial percentage of the rated total value of the first parameter at a percentage over 100% of the rated total value of the second parameter;
• receiving one or more inputs in relation to at least one of the parameters;
• and
• operating the device based on the received one or more inputs according to the control curve information.

A method comprising:

• determining, for a system load having a first parameter and a second parameter in which the first parameter and the second parameter are correlated, a first setpoint of both rated total value of the system load for the first parameter and rated total value of the system load for the second parameter;
• determining a second setpoint of both a minimum partial percentage of the rated total value of the first parameter at a percentage over 100% of the rated total value of the second parameter;
• and
• selecting a device having control curve information dependent on at least the first parameter and the second parameter which has a power capacity which minimally satisfies power required to achieve the first setpoint and the second setpoint.

A system comprising:

• one or more controllers or one or more processors configured to:
• determine, for a system load having a first parameter and a second parameter in which the first parameter and the second parameter are correlated, a first setpoint of both rated total value of the system load for the first parameter and rated total value of the system load for the second parameter;
• determine a second setpoint of both a minimum partial percentage of the rated total value of the first parameter at a percentage over 100% of the rated total value of the second parameter;
• and
• select a device having control curve information dependent on at least the first parameter and the second parameter having a power capacity which minimally satisfies power required to achieve the first setpoint and the second setpoint.

A non-transitory computer readable medium comprising instructions which, when executed by one or more controllers or one or more processors, cause the one or more controllers or the one or more processors to perform a method, the instructions comprising:

• instructions for determining, for a system load having a first parameter and a second parameter in which the first parameter and the second parameter are correlated, a first setpoint of both rated total value of the system load for the first parameter and rated total value of the system load for the second parameter;
• instructions for determining a second setpoint of both a minimum partial percentage of the rated total value of the first parameter at a percentage over 100% of the rated total value of the second parameter;
• and
• instructions for selecting a device having control curve information dependent on at least the first parameter and the second parameter which has a variable controllable motor having a power capacity which minimally satisfies power required to achieve the first setpoint and the second setpoint.