Graco 231–406, Series A Instructions-Parts List Manual page 7

WARNING
INJECTION HAZARD
To reduce the risk of serious injury,
whenever you are instructed to relieve
pressure, follow the Pressure Relief
Procedure on page 8.
Startup
Always use this procedure to help ensure the sprayer
is ready to operate and that you start it safely. See
Fig. 3
1. For first time startup, flush sprayer. See page 10.
2. Close pressure drain valve (A).
3. Don't install spray tip until pump is primed!
4. Put pump (B) into supply pail.
5. Turn pressure adjusting knob (C) counterclockwise
to lowest setting.
6. Disengage gun safety latch.
WARNING
FIRE AND EXPLOSION HAZARD
To reduce static sparking and splashing,
always remove the spray tip from the
gun, and hold a metal part of the gun
firmly to the side of a grounded metal pail when
flushing.
7. To prime pump, squeeze gun trigger and hold it
open, turn ON/OFF switch (D) to ON, and slowly
increase pressure setting (C) until sprayer starts.
Keep gun triggered until all air is forced out of
system and material flows freely from gun. Re-
lease gun trigger and engage gun safety latch.
CAUTION
Do not run the sprayer dry for more than 30 seconds
to avoid damaging the pump packings.
8. Check all fluid connections for leaks. If any leaks
are found, relieve pressure before tightening
connections.
Airless Operation
9. Check weep hole (Fig. 16, B) of pressure control
10. Engage gun safety latch. Install spray tip and tip
11. Adjust pressure.
WARNING
FIRE AND EXPLOSION HAZARD
To reduce the risk of fluids entering
control box, check weep hole (Fig.16, C)
regularly. Replace o–ring when any
leakage is seen. Also read FIRE OR
EXPLOSION HAZARD on page 2.
for leakage at start up and during operation. If
leakage, replace o–ring as instructed in Pressure
Control Transducer and O–Ring Replacement on
page 20.
guard (E) according to instructions supplied with
tip guard.
a. Turn pressure adjusting knob (C) clockwise
until spray from gun is just completely atom-
ized. To reduce overspray, fogging, and tip
wear and to extend life of sprayer, use lowest
possible pressure needed to get good atom-
ization.
a. If more coverage is needed, use larger tip
rather than increasing pressure.
a. Test spray pattern. To adjust direction of spray
pattern, engage gun safety latch, loosen
retaining nut, position tip guard horizontally for
horizontal pattern or vertically for vertical
pattern and tighten retaining nut.
C
D
B
E
Fig 3
A