42 310531
PrecisionFlo Module Operation
Pressure Relief Procedure
This procedure describes how to relieve pressure for
the PrecisionFlo unit. Use this procedure whenever
you shut off the dispenser/sprayer and before checking
or adjusting any part of the system, to reduce the risk
of serious injury.
WARNING
The PrecisionFlo module pressure must
be manually relieved to prevent the mod-
ule from starting or spraying accidentally.
To reduce the risk of serious bodily injury,
including fluid injection, splashing in the eyes or on
the skin, or injury from moving parts, always follow
the Pressure Relief Procedure whenever you:
are instructed to relieve the pressure
check or service any of the system equipment
shut off the pump, or install or clean the spray
tip.
1.
Shut off the fluid supply to the Metering Valve.
2.
Actuate the Metering Valve and the dispensing
device until the fluid stops flowing from them.
3.
Shut off power to the fluid supply system.
4.
Place waste containers beneath the fluid drain
valve and the dispense device.
5.
Refer to Fig. 29. and perform the following steps
to open the dispense device and relieve fluid
pressure:
a.
Manually actuate the plunger on the solenoid
(B), which opens the dispense device, to
relieve fluid pressure.
b.
Continue actuating the plunger until all pres-
sure is purged from the system between the
needle and the dispense device before pro-
ceeding to the next step.
Fig. 29
B
6.
Slowly open the drain valve to relieve fluid pres-
sure.
7.
Leave the drain valve open until you are ready to
pressurize the system again.
If you suspect a valve, hose, or the dispenser nozzle
has become completely clogged, or that pressure has
not been fully relieved after following the steps above,
VERY SLOWLY loosen the tip guard retaining nut or
hose end coupling and relieve the pressure gradually,
then loosen completely. Clear the tip, valve, or hose at
this point. DO NOT attempt to pressurize the system
until the blockage is cleared.
