Graco 224826 User manual

Instructions–Parts List
308069N
ENG
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
Overspray Masking Liquid
System
For airspray application of fluids.
7545A
ÄÄ
ÄÄ
2700 psi (18.6 MPa, 186 bar) Maximum Working Pressure
80–90 psi (560–630 kPa, 5.6–6.3 bar) recommended regulated air inlet pressure
System
Model 224826
with Stainless Steel Pump*
Pump
Model 224825, Series A
Stainless Steel*
This pump is factory tested in oil. To avoid contami-
nating the masking liquid or the surface being
painted, flush the pump before immersing it in the
masking liquid. Use water only to flush. Paint sol-
vents will damage the seals. Follow the set-up
procedure carefully, and pay special attention to the
Flushing procedure on page 5.
CAUTION

2308069
Warnings
WARNING
INSTRUCTIONS
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury.
DThis equipment is for professional use only.
DRead all instruction manuals, tags, and labels before operating the equipment.
DUse the equipment only for its intended purpose. If you are uncertain about usage, call your Graco
distributor.
DDo not alter or modify this equipment. Use only genuine Graco parts and accessories.
DCheck equipment daily. Repair or replace worn or damaged parts immediately.
DDo not exceed the maximum working pressure of the lowest rated system component. This equip-
ment has a 2700 psi (18.6 MPa, 186 bar) maximum working pressure.
DUse fluids and solvents which are compatible with the equipment wetted parts. Refer to the Tech-
nical Data section of all equipment manuals. Read the fluid and solvent manufacturer’s warnings.
DDo not use hoses to pull equipment.
DRoute hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not expose
Graco hoses to temperatures above 82_C (180_F) or below –40_C (–40_F).
DDo not touch the heater during operation; it is very hot.
DComply with all applicable local, state, and national fire, electrical, and safety regulations.
INJECTION HAZARD
High pressure fluid from dispense device, hose leaks or ruptured components will pierce skin. This
may look like just a cut, but it is a serious injury that can result in amputation. Get immediate surgi-
cal treatment.
DDo not point the dispensing device at anyone or at any part of the body.
DDo not put your hand or fingers over the fluid outlet.
DDo not stop or deflect leaks with your hand, body, glove, or rag.
DFollow Pressure Relief Procedure in this manual, when you stop dispensing and before cleaning,
checking or servicing equipment.
DTighten all fluid connections before operating the equipment.
DCheck the hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.

3308069
WARNING
FIRE AND EXPLOSION HAZARD
Improper grounding, poor ventilation, open flames or sparks can cause a hazardous condition and
result in a fire or explosion and serious injury.
DGround the equipment and the object being sprayed. Refer to Grounding on page 4.
DIf there is any static sparking or you feel an electric shock while using this equipment, stop spray-
ing immediately. Do not use the equipment until you identify and correct the problem.
DProvide fresh air ventilation to avoid the buildup of flammable fumes from solvents or the fluid
being sprayed.
DKeep the spray area free of debris, including solvent, rags, and gasoline.
DElectrically disconnect all equipment in the spray area.
DExtinguish all open flames or pilot lights in the spray area.
DDo not smoke in the spray area.
DDo not turn on or off any light switch in the spray area while operating or if fumes are present.
DDo not operate a gasoline engine in the spray area.
TOXIC FLUID HAZARD
Hazardous fluid or toxic fumes can cause serious injury or death if splashed in the eyes or on the skin,
inhaled, or swallowed.
DKnow the specific hazards of the fluid you are using.
DStore hazardous fluid in an approved container. Dispose of hazardous fluid according to all local,
state and national guidelines.
DAlways wear protective eyewear, gloves, clothing and respirator as recommended by the fluid and
solvent manufacturer.

4308069
Spray Gun Safety
Learn how to use the gun’s trigger safety
latch before operating the system.
The high pressure, airless spray gun supplied with this
system is equipped with a trigger safety latch. When
set, this latch prevents the gun from being triggered
accidentally. Read more about gun safety in the warn-
ing section, FLUID INJECTION on page NO TAG.
Set the trigger safety latch whenever you stop spray-
ing, even for only a minute, or if changing a tip.
TO RELEASE THE LATCH
FOR THE OFF SAFE, or
spraying position, gently
pull up on the latch and
turn it so it is parallel with
the gun body.
Fig. 1
TO SET THE LATCH IN
THE SAFE, or
non–spraying position,
turn it so it is at right
angles to the gun body.
7546A
7547A
Installation
Grounding
WARNING
FIRE AND EXPLOSION HAZARD
Before operating the pump, ground the
system as explained below. Also read
the section FIRE AND EXPLOSION
HAZARD on page 3.
1. Pump: use a ground wire and clamp as shown in
Fig. 2. Remove the ground screw (Z) and insert
through the eye of ring terminal at end of ground
wire (Y). Fasten the ground screw back onto the
pump and tighten securely. Connect the other end
of the ground wire to a true earth ground.
2. Fluid hoses: use only electrically conductive
hoses.
3. Air compressor: follow manufacturer’s recommen-
dations.
4. Spray gun: obtain grounding through connection to
a properly grounded fluid hose and pump.
5. Fluid supply container: according to local code.
6. Object being sprayed: according to local code.
7. Any pails used when flushing: use only metal,
grounded pails when flushing. Make firm metal-to-
metal contact between a metal part of the spray
gun and a pail. Use the lowest pressure possible.
Y
Z
Fig. 2

5308069
Installation
Prepare for installation
You must supply the following equipment to complete
the installation of this system.
1. An adjustable wrench and a screwdriver.
2. A grounding wire and clamp for the air motor.
3. The compressed air supply, with a hose that easily
reaches the air regulator assembly.
4. Two 5 gallon flushing containers, one with warm
soapy water, and one with cool, clean water.
CAUTION
Do not use paint solvents to flush, which will damage
the pump seals.
Setup for initial flushing See Fig. 3.
5. Screw the air regulator assembly into the air inlet
of the motor.
6. Remove the quick disconnect coupler from the
nipple. To disconnect, pull back on the sleeve of
the coupler and pull it away from the nipple. Screw
the coupler onto the air line. Do not connect the air
line to the pump until you are instructed to in the
Initial flushing or OPERATION section.
7. Screw the swivel fitting of the spray hose onto the
pump outlet nipple, and tighten it securely with a
wrench.
8. Follow the grounding instructions in the Ground-
ing section on page 4.

6308069
Installation
Fig. 3
AIR REGULATOR & GAUGE
AIR LINE
QUICK DISCONNECT NIPPLE
QUICK DISCONNECT COUPLER
SPRAY HOSE
SPRAY GUN
RAC V
TIP GUARD
GROUND WIRE & CLAMP
purchase separately
OUTLET NIPPLE
7549A
Initial flushing
CAUTION
This pump is factory tested in oil. To avoid contami-
nating the masking liquid or the surface being
painted, flush the pump before immersing it in the
masking liquid.
1. Mount the pump in a 5 gallon pail of warm, soapy
water.
2. Be sure there is no spray tip in the gun. See Fig. 7
if the tip needs to be removed.
3. Set the trigger safety latch. See Fig. 1.
4. Be sure the air regulator handle is turned to zero
(fully left as you look at it).
5. Connect the air line to the pump.
6. Release the trigger safety latch.
7. Aim the gun into the flushing pail and squeeze the
gun trigger and hold it open.
8. Slowly open the air regulator until the pump is
running slowly and smoothly.
9. Using very low pressure, direct the spray from the
gun back into the flushing container. Circulate the
soapy water in this way for several minutes. Then
release the trigger, set the trigger safety latch, and
disconnect the air line to the pump.
10. Switch the pump to the clean container of water.
Connect the air line, release the trigger safety
latch, and repeat Step 9, above.
11. Raise the pump out of the pail. Trigger the gun to
force the water from the system. DO NOT run the
pump dry for more than 10 seconds to avoid
damaging the pump packings.

7308069
Installation
ÄÄ
ÄÄ
Fig. 4
AIR REGULATOR & GAUGE
AIR LINE
QUICK DISCONNECT NIPPLE
QUICK DISCONNECT COUPLER
SPRAY GUN
RAC V
TIP GUARD
GROUND WIRE & CLAMP
purchase separately
16 GALLON DRUM
Note how suction tube curls around the
sides and bottom of the drum.
Â
VENT HOLE
BUNG HOLE
DISPLACEMENT PUMP
HOSE CLAMP
SUCTION TUBE
STRAINER
DRAIN
VALVE
5 GALLON PAIL
BUNG ADAPTER
THUMBSCREW
7550A
Setup for operation
NOTE: Be sure the system has been thoroughly
flushed.
1. Loosen the hose clamp on the suction hose. Slide
the suction hose as far as possible onto the pump
intake valve.
2. Slide the clamp up and tighten its screw
snugly! A loose clamp prevents the pump from
getting adequate fluid supply, which results in low
fluid flow and/or spitting air from the gun.
3. Remove the bung cover from the drum and open
the vent hole.
4. Loosen the thumbscrew on the bung adapter.
5. Slide the suction hose and pump through the bung
hole in the drum cover. Before the final positioning
of the pump, screw the bung adapter firmly into the
bung hole. Now position the pump as follows.
a. For 55 gallon drums: slide the pump into the
drum until you sense that the strainer is at the
bottom of the drum. Tighten the thumbscrew
snugly.
b. For 16 gallon drums: slide the pump into the
drum and allow the suction hose to curl around
the side and rest on the bottom of the drum.
Tighten the thumbscrew snugly.
c. For 5 gallon demo pails: Remove the suction
hose and strainer. Install the accessory pail
cover, p/n 222058. Slide the pump into the pail
until the intake valve is 1/2” off the bottom of
the pail. Tighten the bung adapter thumbscrew
snugly.
NOTE: Go to Prime the system on page 9.

8308069
Operation
Pressure Relief Procedure
WARNING
INJECTION HAZARD
Fluid under high pressure can be in-
jected through the skin and cause
serious injury. To reduce the risk of an
injury from injection, splashing fluid, or moving
parts, follow the Pressure Relief Procedure
whenever you:
Dare instructed to relieve the pressure,
Dstop spraying,
Dcheck or service any of the system equipment,
Dor install or clean the spray tip.
1. Engage the gun’s trigger safety latch.
2. Close the air regulator and disconnect the air
supply hose.
3. Disengage the trigger safety latch. Hold a metal
part of the gun firmly to the side of a grounded
metal waste pail and trigger it to relieve the fluid
pressure.
4. Engage the trigger safety latch.
5. Place a pail under the drain valve and open the
drain valve to be sure all fluid pressure is relieved.
If you suspect that the tip guard or hose is 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 to relieve pressure
gradually, then loosen completely.

9308069
Operation
ÄÄ
Fig. 5
AIR REGULATOR & GAUGE
AIR LINE
QUICK DISCONNECT NIPPLE
QUICK DISCONNECT COUPLER
SPRAY
GUN
TIP GUARD
TIGHTEN TO
CLOSE
DRAIN VALVE DETAIL
Prime the system
1. Set the trigger safety latch. See Fig. 1.
2. Remove the spray tip from the gun, if it is installed.
See Changing spray tips on page 11.
3. Be sure the air regulator handle is turned to zero
(fully left as you look at it).
4. Connect the air line to the pump.
5. Release the trigger safety latch.
6. Hold a metal part of the gun firmly against and
aimed into a grounded metal pail. See Fig. 6.
Squeeze the gun trigger and hold it open.
Fig. 6
MAINTAIN FIRM
METAL-TO-METAL
CONTACT BETWEEN
GUN AND
GROUNDED METAL
CONTAINER
GROUND
WIRE
7. Slowly open the air regulator until the pump is
running slowly and smoothly.
8. Dispense about 1 pint of masking liquid to be sure
all air is pushed out of the system and the liquid
flows freely.
9. Release the trigger and set the trigger safety latch.
See Fig. 1.
10. Check all fluid connections for leaks; relieve pres-
sure before tightening connections.
Select a tip
Two tips are provided with the gun. The size is marked
on the cylinder handle. The size 621 tip comes in-
stalled in the tip guard. Each tip comes with a square
ring and a seal. Refer to Changing spray tips and
Fig. 7.
11. Use the 211 size tip for narrow surfaces such as
door jambs.
12. Use the 621 size tip for wide or large surfaces.

10 308069
Operation
Installing the spray tip
1. Be sure the trigger safety latch is engaged.
2. Install the tip cylinder. Hold the cylinder with the
arrow handle straight up. Push the cylinder into the
tip guard so the flange on the cylinder fits into the
slots at the base of the tip guard. See Fig 7. Then
turn the arrow handle in the direction of the tip
guard, which is the spraying position. See Fig. 8.
If the tip guard was removed from the gun and
you are are reinstalling it:
3. Be sure the seal and square ring are in place as
shown in Fig. 7. If not, place the seal on the end of
a pencil with the curved side out. Guide the seal
into the retaining nut and turn it until it straddles
the cylinder. Drop in the square ring and press it
down.
4. Screw the retaining nut snugly onto the gun,
holding the tip guard in the desired direction while
tightening the nut. See Step 4 of Adjusting the
spray pattern and spraying pressure on
page 12 for more information on adjusting the
direction of the spray pattern.
CAUTION
To avoid damaging the tip guard:
DNever use a wrench to turn the plastic tip guard,
which causes internal damage.
DNever hang the gun by the tip guard.
Fig. 7
TIP GUARD
TIP CYLINDER
ARROW HANDLE
RETAINING NUT
SEAL
SQUARE RING
FLANGE
curved side faces retaining nut
SLOT
TIP SIZE MARKED HERE