Hitachi HISCREW OSP-22M5ARI User Manual

36
7.4.1. Air Receiver
When your plant airline has the volume of more
than 40 liters, you can operate the A with-
out an air receiver tank. In order to prevent the
plant airline pressure from fluctuating or to effec-
tively control the A capacity for saving the
power, however, install an external air receiver
tank of the minimum capacity such as:
7. INSTRUCTIONS FOR INSTALLATION [Instructions When Piping]
7.4 Instructions When Piping
7.4.3 Parallel operation
(1) At one-unit is in operation, completely close
the stop valve to the discharge pipe on the
compressor which is not operating.
(2) In case the unit is installed in parallel with a
reciprocating compressor, be sure to install an
air receiver in-between to prevent the propa-
gating vibration from reciprocating compres-
sor. Connect piping to the air receiver’s outlet
side as shown in the figure.
(1) Do not install a check valve between the air re-
ceiver tank and the A.
(2) When you want to use the ECOMODE function,
install an air receiver tank that has a larger ca-
pacity than otherwise required. When you install
an external air dryer and filters under the
ECOMODE function, place them after the air re-
ceiver tank so that the ECOMODE function can
effectively save the power.
ECOMODE Function 22 kW Models 37 kW Models
Not used 0.43 m
3
0.7 m
3
Used 0.7 m
3
1.24 m
3
7.4.2. Discharging Air pipe
(1) Discharging pipes must be joined with an Union
or a Flanged joint, and a Stop Valve must be
fixed to them for maintenance and inspection.
(2) If there is concaved or upright piping in the
run, install a drain valve at the bottom of the
run to prevent the accumulation of the drain.
In case of upright piping, keep a space of more
than 500 mm from the unit so that its left side
cover is accessible for detachment.
(3) In case of connecting the discharge pipe to a
main pipe, joint the discharge pipe from over
to the main pipe to prevent the condensate
from back-flowing.
7.4.4. Drain Trap Piping for Dryer
Install a drain trap for dryer as shown in the fig-
ure below after fastening a pet cock to the trap.
●
Length of the pipe between the drain trap and
drain discharge port should be shorter than 3 m,
and release the discharge air into the open air.
●
Keep the pet cock of the drain trap always
slightly open.
UnionjointorFlangedjoint
DischargingAir
StopValve
DrainValve
DrainValve
500mmormore
Stop Valve
Discharge Air
Check Valve
Drain Valve
Connect to the outlet of the Air-Receiver
()
with taper between about 1/100 and
1/200 down to the drain valve.
CAUTION
Be sure to follow the piping work described
above. Otherwise, the condensate failed to
be released may mix in the discharge air.
FromCompressor
DischargeMainPip
e

Hitachi HISCREW OSP-22M5ARI Specifications

General

Brand	Hitachi
Model	HISCREW OSP-22M5ARI
Category	Air Compressor
Language	English