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Pressure Relief Procedure
3A2098H 57
Pressure Relief Procedure
1. Shut off the fluid supply to the fluid plate assembly.
2. Place a waste container beneath the dispense
valve.
3. In maintenance mode, select Full Open Dispense
Mode, which opens the regulator and dispense
valve. Press the manual dispense button until
the fluid flow stops.
4. If the dispense valve cannot be actuated from the
control center, refer to F
IG
. 36 and perform the fol-
lowing steps to open the dispense valve and relieve
fluid pressure:
a. Manually actuate the plunger on the solenoid to
open all dispense valves attached to this fluid
plate and relieve fluid pressure. See F
IG
. 36.
b. Continue actuating the plunger until all pressure
is purged from the system between the needle
and the dispense valves attached to this fluid
plate before proceeding to the next step.
5.
For systems with multiple fluid plates,
repeat previ-
ous steps for other fluid plates.
6. Shut off air to the fluid plate.
7. Place a waste container below the air filter assem-
bly then open drain valve on the air filter assembly.
Close drain valve once air is relieved.
8. Turn main power switch on control panel to the OFF
position.
9. If you have followed the previous steps and suspect
that a valve, hose, or dispense nozzle is clogged or
that pressure has not been fully relieved, very slowly
remove the dispense tip, clean the orifice, and con-
tinue relieving pressure.
10. If this does not remove the clog, cover the hose end
coupling with a rag then very slowly loosen the hose
end coupling to relieve pressure gradually, then
loosen the coupling completely. Clear the valves or
hose. Do not pressurize the system until the block-
age is cleared.
The equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid such as skin injection, splashing
fluid and moving parts, follow the Pressure Relief Pro-
cedure when you stop dispensing and before clean-
ing, checking or servicing the equipment.
F
IG
. 36: Dispense Valve Air Solenoid
Dispense Valve Air Solenoid