18
GM 4700AC
OPERATING MANUAL
VERSION 09/2011
ORDER NUMBER DOC
2311730
5.1.6
PRESSURE RELIEF
The pressure must always be relieved:
- when the spraying tasks are fi nished,
- before maintaining the spray system,
- before carrying out cleaning tasks on the spray system,
- before moving the system to another location,
- if something must be checked on the spray system, or
- if the nozzle or the fi lter is removed from the gun.
Pressure relief procedure:
1.
Secure gun with locking device.
2.
Close air supply to pump and relieve air pressure in air motor.
3.
Release locking device on gun.
4.
Press electrically conductive part of gun against grounded metal container for
return material and open the gun using the trigger guard; keep it open until no
further overpressure is detected.
5.
Secure gun with locking device.
6.
Open material pressure relief valve (see system description) and leave open.
If the pressure is still not completely relieved after this:
-
- If nozzle is clogged: slowly loosen the union nut to release the remaining
pressure.
-
- If material hose is obstructed: slowly loosen the hose connections to release the
remaining pressure.
Note:
Always follow the procedure described above if pressure relief is specifi ed in the
instructions.
Please read the general safety instructions in chapter 2.
WARNING
High pressure spray jet!
Danger to life from injecting paint or solvent
Never reach into the spray jet.
Never point the spray gun at people.
Consult a doctor immediately in the event of skin injuries caused
by paint or solvent. Inform the doctor about the paint or solvent
used.
Never seal defective high pressure parts, instead relieve the
pressure from them and replace them.
Wear the appropriate protective clothing, gloves, eyewear, and
respiratory protection.
The components for pressure relief on a CE-compliant spray system are:
- Air cock with pressure relief hole mounted between compressed air source and
pneumatic pump.
- Material pressure relief valve mounted between pump and gun.
