Hitachi NEXT Series Instruction Manual page 44

5. INSTALLING AND PIPING THE DSP [Piping the DSP Air Compressor]
5.4.7 Cooling water piping
Water Drain Valve
① Piping for supplying water to and draining water from
the cooler is required.
② Mount the water drain valves of the cooling water
outlet and inlet downward facing downward as shown
in the figure. The water drain valves may also be
mounted facing sideways.
③ Use the union joints that enable you to disconnect and
reconnect the cooling water pipes easily.
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5.4.8 Connecting with the Control Air
Cooling
Water
Outlet
Cooling
Water
Inlet
Oil Mist Remover needs the compressed air control air
of 0.10 to 0.39 MPa (15 to 56 psi) as a control air. Prepare
the air compressor, and connect the control air pipe to
the "A" part of the Oil Mist Remover.
The control air must be as dry as possible. Connect the
control air pipe, therefore, to the downstream of the air
dryer or, if the air dryer is not used, to the upper section of
the air receiver. This allows you to less frequently drain the
condensate from the filter bowl.
Pipe
A
IMPORTANT
Pressure
Gauge
Filter
Regulator