WAGNER GM 1-350 Operating Manual page 17

VERSION 02/2015
OPERATING MANUAL
7.3.2
PRESSURE RELIEF / WORK INTERRUPTION
The pressure must always be relieved:
- when the spraying tasks are fi nished,
- before carrying out maintenance work on the spraying system,
- before carrying out cleaning tasks on the spraying system,
- before moving the spraying system to another location,
- if something must be checked on the spraying system,
- if the nozzle or the fi lter is removed from the spray gun.
The components for pressure relief on a CE-compliant spray system include:
- Air cock with pressure relief hole mounted between compressed air source and
pneumatic pump.
- Product pressure relief valve mounted between pump and spray gun.
Please read the general safety instructions in Chapter 4.
Pressure relief procedure:
1. Secure the spray gun with the locking device.
2. Close air supply to pump and relieve air pressure in air motor.
3. Release the locking device on the spray gun.
4. Press the electrically conductive part of the spray gun against grounded metal tank
for return product and open the spray gun using the trigger guard; keep it open
until no further overpressure is detected.
5. Secure the spray gun with the locking device.
6. Open product pressure relief valve (see system description) and leave open.
If the pressure is still not completely relieved after this:
- If nozzle is clogged: slowly and carefully loosen the union nut to release the
remaining pressure.
- If product 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.
ORDER NUMBER DOC2349369
GM 1-350/530
17