Hitachi NEXT Series Instruction Manual page 74
Oil-free rotary screw air compressor
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Also See for NEXT Series:
- Instruction manual (110 pages) ,
- Service manual (85 pages) ,
- Instruction manual (144 pages)
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8. STANDARD COMPONENTS AND SUBSYSTEMS [Capacity Control System]
8.4.6 PQ Wide Mode – Capacity Control Flow Settings
NOTE: PQ Wide Mode is set to OFF at the time of shipment from the factory. If PQ Wide Mode is required, it
needs to be set to ON on the instrument panel.
(1) PQ Wide Mode
Power Savings are Desired
Reliable energy savings are achieved
by lowering operating pressure.
100
90
80
90
Air consumption (%)
This figure is intended for 125psi(0.86 MPa) model.
① By reducing the operating pressure from 125 psi
(0.86 MPa) to 106 psi (0.73 MPa), the maximum
consumption power is automatically limited to
approximately 92% of the consumption power at 125
psi (0.86 MPa).
② By reducing the operating pressure further down to
87 psi(0.60 MPa), the consumption power is reduced
to approximately 86%. The lowest set pressure is
71 psi (0.49 MPa).
If reducing the power is desired; the "PQ Wide Mode:
OFF" is recommended.
(2) PQ wide mode settings
The settings for PQ Wide Mode are to be changed
while the air compressor is stopped. Press the
SELECT/WIDE button o the instrument panel.
3.4.2 and 3.4.3 for the control pressure setting.
72
PQ Wide Mode:
OFF
①
②
100
110
Higher Capacity is Desired
Increasing the capacity of the air compressor is
achieved by utilizing the maximum power of
the air compressor at lower operating pressure.
100
90
80
80
① B y reducing the operating pressure from 125 psi
(0.86 MPa) to 100 psi (0.69 MPa), PQ-Wide Mode
utilizes the surplus power from the reduction in
p r e s s u r e t o i n c r e a s e t h e c a p a c i t y u p t o
approximately 117% of the rated capacity.
② T he lowest set pressure is 100 psi (0.69 MPa). The
power consumption at 100 psi (0.69 MPa) is 100%.
The consumption power is 100%, utilizing the maximum
rated power of the air compressor at a lower operating
pressure for maximum capacity. If maximum capacity
is desired; the "PQ Wide Mode: ON" is recommended.
RUNNING CONTROL
ALARM
RESET
FUNC
REMOTE
SELECT/WIDE
1
STR
PQ Wide Mode:
ON
②
①
90
100
117
Air consumption (%)
SELECT/WIDE
1
ON: The Light blinks.
OFF: The Light is off.
SELECT／WIDE
Set by button
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Troubleshooting
