Ingersoll-Rand 7120 - Manual (Page 30)

27 7/120 (P425AWIR), 9/110 (XP375AWIR), 10/105 (HP375AWIR), 14/85 (VHP300AWIR),
7/170 (P600WIR), 10/125 (HP450WIR), 14/115 (VHP400WIR)
STARTING THE MACHINE
WARNING: Under no circumstances should volatile liquids
such as Ether be used for starting this machine.
1
3
2
All normal starting functions are incorporated in the key
operated switch.
. Turn the key switch to position 1. The engine fault and
compressor fault lamps will flash..
Wait To Start Lamp.
. Turn the key switch to position 1 until the Wait To Start Lamp.
(14) extinguishes.
. Turn the key switch to crank position (3) (engine start
position)
. NOTE: Position (2) not used on AWIR models.
. Release to position (1) when engine starts. The engine will
now be running at a reduced speed.
At temperatures below 0 _ C or if there is difficulty starting first
time:
. Open the service valve fully, with no hose connected.
. Complete starting sequence above.
. Close service valve as soon as engine runs freely.
. Do not allow machine to run for long periods with service
valve open.
. Allow the engine to reach operating temperature.
. At this point in the operation of the machine it is safe to apply
full load to the engine.
NOTE: Wear hearing protection at all times when the engine is
started with the service valve open and air is flowing from the
valve.
PUSH AFTER WARM UP
NOTE: In order to allow the machine to start at a reduced load,
a valve, which is operated by a button located on the instrument
panel, is incorporated in the regulation system. (The valve
automatically returns to the start position when the machine is
switched off and air pressure relieved from the system).
. Allow the engine to reach its operating temperature – then
press the button (7).
. At this point in the operation of the machine it is safe to apply
full load to the engine.
DUAL PRESSURE WHEN FITTED
Machines which operate in excess of 7 bar (100 psi) can
optionally be fitted with a dual pressure switch inside the unit.
This switch selects between 7 bar (100 psi) and the machine
rated pressure, cfm remains nominally constant.
Starting and stopping are unaffected by the selection and during
normal running the selector switch may be safely operated.
Precaution must be taken to ensure that downstream
equipment is rated to suit the available pressure.
The pressure gauge indicates which setting has been selected.
STOPPING THE MACHINE
. Close the service valve.
. Allow the machine to run unloaded for a short period of time
to reduce the engine temperature.
. Turn the start switch to the 0 (off) position.
NOTE: As soon as the engine stops, the automatic blowdown
valve will relieve all pressure from the system.
If the automatic blowdown valve fails to operate, then
pressure must be relieved from the system by means of the
service valve(s).
CAUTION: Never allow the machine to stand idle with pressure
in the system.
EMERGENCY STOPPING
In the event that the unit has to be stopped in an emergency,
TURN THE KEY SWITCH LOCATED ON THE INSTRUMENT
PANEL TO THE 0 (OFF) POSITION.
RE–STARTING AFTER AN EMERGENCY
If the machine has been switched off because of a machine
malfunction, then identify and correct the fault before attempting
to re–start.