43
5. INSTALLING AND PIPING [Piping the Air Compressor]
・
This is to prevent the reciprocating compressor's air
pulsation from affecting this air compressor.
・
Typical operation is to run this air compressor as long
as possible as the primary and start, and stop the
reciprocating air compressor in parallel as a floating
trim air compressor, as required by the compressed air
demand.
5.4.4 Air Receiver Tank
Discharge
Air
Stop Valve
Air Receiver Tank
Pressure detecting piping
Motorized
isolation valve
Flange
5.4.5 Reciprocating Compressor and
Parallel Piping
Check Valve
Stop Valve
Discharge Air
Stop Valve
Piping to air receiver
tank outlet
Model
Dis.Pressure
psi [MPa]
Minimum Capacity of
Air Receiver Tank US gallon [m
3
]
DSP-90A6N
DSP-90W6N
DSP-90VA6N
DSP-90VW6N
DSP-110A6N
DSP-110W6N
DSP-110VA6N
DSP-110VW6N
100/125
[0.69/0.86]
620
[2.26]
CAUTION
Do not install a check valve between this air
compressor and the air receiver tank. This
could result in short cycling (frequent loading
and unloading) and operating problems to the
capacity control system.
Failure to install an adequately sized air
receiver tank may cause the air compressor to
frequently load/unload. This may shorten the
mechanical life of the air compressor.
Discharge
Air
Stop Valve
Air Receiver Tank
Motorized isolation
Pressure
detecting
piping
Flange
The motorized isolation valve is closed when the air
compressor is stop. The operation WITHOUT the
motorized isolation valve results in the backflow of
condensate from the plant compressed air system. Then
it results in the early damage of check valve, aftercooler
and etc by rusting
CAUTION
IMPORTANT
5.4.3 How to Install Automatic
Discharge Valve
The air compressor is equipped with AUTO restart/
stop function as a standard function. The pressure for
capacity control is detected at the secondary side of the
motorized isolation valve. Install the motorized
isolation valve and pressure detecting piping (standard
accessor y). Connect the pressure detecting piping
from upper side of main piping to pressure detecting
port of the air compressor as above.
Install the pressure detecting piping as close as
motorized isolation valve. The operation with NOT
installed pressure detecting piping results in the air
relief valve action.
①
Install the air receiver tank because this air
compressor is equipped with 2-step capacity control
system. To prevent the pressure fluctuation and to
maximize the energy saving feature, the minimum size
of the air receiver tank is indicated in the table blow.
②
Install the air receiver tank of
620 USgal (2.26m
3
)
of more
for the AUTO operation, multi-unit control or lead/lag
operation in order to achieve the better energy saving effect.
③
Install the air receiver tank of
620 USgal (2.26m
3
)
of
more for using ECOMODE in order to achieve the
better energy saving effect on all load ratio.
IMPORTANT
