Graco 234129, Инструкция по эксплуатации

Страница: 30 / 108

Operation
30 309738L
Operation
Pressure Relief Procedure
This procedure describes how to relieve pressure for the
PrecisionFlo LT system.
1. Shut off the fluid supply to the fluid module.
2. Place a waste container beneath the fluid drain
valve, which is located at the filter. Place a waste
container beneath the dispense device.
3. Slowly open the drain valve, located at each filter, to
relieve fluid pressure. Close valve when pressure
gauge reads zero.
4. In manual dispense mode, touch and hold the Man-
ual Dispense Gun key
, which will open the reg-
ulator and the dispensing device, until the fluid stops
flowing from them.
5. If the dispense device cannot be actuated from the
control unit, refer to F
IG
. 13 and perform the follow-
ing steps to open the dispense device and relieve
fluid pressure:
a. Manually actuate the plunger on the solenoid,
that opens the dispense device, to relieve fluid
pressure. Refer to F
IG
. 13.
b. Continue actuating the plunger until all pressure
is purged from the system between the needle
and the dispense device before proceeding to
the next step.
6. Shut off power and air to the fluid supply systems.
If you have followed the steps above and still suspect
that a valve, hose, or dispense nozzle is clogged or
pressure has not been fully relieved, very slowly remove
the dispense tip, clean the orifice, and continue relieving
pressure.
If this does not remove the obstruction, very slowly
loosen the hose end coupling and relieve pressure grad-
ually, then loosen the coupling completely. Clear the
valves or hose. Do not pressurize the system until the
blockage is cleared.
Safety Reminder
Follow the precautions below and the warnings that
begin on page 6.
WARNING
Read Warnings, page 6.
F
IG
. 13
WARNING
Read Warnings, page 6.
"
Manual
Actuator
To Dis-
pense
Valve
Dispense Valve
Air Solenoid