Daikin Super Unit SUT00S8007-30, Operation Manual

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PIM00424
2-1
Chapter 2 Features and Structure
2.1
Energy-saving

By using the highly efficient IPM motor driving system that DAIKIN originally developed, this hydraulic
unit remarkably improved the energy efficiency of the motor.

Two fixed displacement pumps (high-pressure small-capacity, low-pressure high-capacity) are adopted in
this double-pump specification. In this system, single/confluence mode can be automatically switched
according to load pressure. When the flow rate is necessary, the high-pressure small-capacity pump and
the low-pressure high-capacity pump are joined together to rotate at a high speed. When the flow rate is
not necessary (for example, pressure holding state), only the high-pressure small-capacity pump
rotates
at a low speed. In this way, significant energy saving effect is achieved.
Flow rate
Flow rate
Pressure
Pressure
Low pressure (confluence) side
PQ characteristics
qL
PL
High pressure (single) side
PQ characteristics
qH
PH
High pressure (single) side
0
Pressure
Flow rate
16 patterns can be set
PL
PH
qH
Low pressure (confluence) side
qL
Outlet (Rc 3/4)
Confluence / single switching
solenoid valve drive
High-pressure side relief valve
Flow rate
controller
Low-pressure side relief valve
IPM motor
Pressure
sensor
High pressure
small capacity
pump
Low pressure high
capacity pump
Drain
Controller
Rotational position
Check valve with
orifice