8
The Function of each mode
Mode
Mode
Instruction
Function
Automatic
Automatic
The pump adjusts performance automatically when it is
working in the condition of max to min proportional
pressure.
PPI
Min
proportional
pressure
curve
The pump working point changes with the min
proportional pressure according to the flow rate of system
demand. The pump pressure would be lower when the
flow rate decreases, and the pump pressure would be
higher when the flow rate increase.
PPII
Max
proportional
pressure
curve
The pump working point changes with the max
proportional pressure according to the flow rate of system
demand. The pump pressure would be lower when the
flow rate decreases, and the pump pressure would be
higher when the flow rate increase.
CPI
Min
constant
pressure
curve
According to the flow rate of system demand, the pump
working point changes on the basis of min constant
pressure curve. The constant pressure of pump is
irrelevant with the flow rate.
CPII
Max
constant
pressure
curve
According to the flow rate of system demand, the pump
working point changes on the basis of max constant
pressure curve. The constant pressure of pump is
irrelevant with the flow rate.
III
Speed III
The pump works with constant speed at the basis of
constant curve. In the Speed III mode, the pump is set to
work at the max curve in any working conditions. If the
pump is set at Speed III, it easily wears out quickly.
II
Speed II
The pump works with constant speed on the basis of
constant curve. In the Speed II mode, the pump is set to
work at the middle curve.
I
The pump works with constant speed on the basis of
constant curve. In the Speed I mode, the pump is set to
work at the min curve.
Speed I
