For QdeltaH, a positive dH is the height that water must be RAISED across the pump.
When DischargeControlActive is set (e.g. PID controlled pump) this HQ relation is the maximum pump capacity. Set to null if no maximum capacity.
and maximum discharge of QH relation for QH and QdeltaH pumps Minimum discharge allowed for a discharge controlled pump (e.g. PID). Set to null to disable. .public bool InterpolateMaxDischargeBetweenHQRelations { get; set; }