Graco 25D117, Операция

Страница: 22 / 50

Operation
22 3A5354B
Shutdown
Follow the procedure below for normal system shut
down, such as at the end of the work day.
1. Set the ram director valve (BC) to DOWN.
2. Follow the Pressure Relief Procedure on page 20.
3. Close the air motor ball valve (BF) to relieve the air
motor pressure, then close the main air ball valve
(BA) to relieve the system pressure.
4. Press the on/off key , then turn off the main
power switch (MP) on the control box.
Turning the system OFF relieves pressure from the
pump motor. As the main ball valve is closed, the
motor pressure is relieved through the hole on the ball
valve shown in F
IG
. 19. However, this does not
depressurize the fluid pressure. To help prevent seri-
ous injury from pressurized fluid, such as skin injec-
tion and splashing fluid, follow the
Pressure Relief
Procedure on page 20.
F
IG
. 19: Main Air Ball Valve
Open
Closed
Pressure
Relief
F
IG
. 20: Power Switch
Many warm melt materials tend to expand when heat-
ing and may cause a heated hose to burst. To avoid
serious injury from a bursting hose, open the dis-
pense valve during system heat up and lock the dis-
pense valve trigger open every time you shut the
system down.
I ON
O OFF