Graco 237282 Operation manual

Instructions – Parts List
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
Copyright 1988, Graco Inc. is registered to I.S. EN ISO 9001
17:1 RATIO, WALL MOUNT
Senator Pumps
For Airless and Air–Assisted Applications
Part No. 237282, Series B
For ambient temperature spray applications.
1700 psi (117 bar, 11.7 MPa) Maximum Fluid
Working Pressure
100 psi (7 bar, 700 kPa) Maximum Air Input Pressure
307933M
4393B
Model 237282 Shown
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
See page 2 for Table of Contents.
Parts

2 307933
Table of Contents
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation/Maintenance 14. . . . . . . . . . . . . . . . . . . . . . . .
Parts 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting Hole Layout 20. . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Information 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Symbols
Warning Symbol
WARNING
This symbol alerts you to the possibility of serious
injury or death if you do not follow the instructions.
Caution Symbol
CAUTION
This symbol alerts you to the possibility of damage to
or destruction of equipment if you do not follow the
instructions.
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 not sure, call your Graco distributor.
DDo not alter or modify this equipment.
DCheck equipment daily. Repair or replace worn or damaged parts immediately.
DDo not exceed the maximum working pressure of the lowest rated system component. Refer to the
Technical Data on page 21 for the maximum working pressure of this equipment.
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 180_F (82_C) or below –40_F (–40_C).
DWear hearing protection when operating this equipment.
DDo not lift pressurized equipment.
DComply with all applicable local, state, and national fire, electrical, and safety regulations.

3307933
WARNING
SKIN INJECTION HAZARD
Spray from the gun, leaks or ruptured components can inject fluid into your body and cause extremely
serious injury, including the need for amputation. Fluid splashed in the eyes or on the skin can also
cause serious injury.
DFluid injected into the skin might look like just a cut, but it is a serious injury. Get immediate surgi-
cal treatment.
DDo not point the gun at anyone or at any part of the body.
DDo not put your hand or fingers over the spray tip.
DDo not stop or deflect leaks with your hand, body, glove or rag.
DDo not “blow back” fluid; this is not an air spray system.
DAlways have the tip guard and the trigger guard on the gun when spraying.
DCheck the gun diffuser operation weekly. Refer to the gun manual.
DBe sure the gun trigger safety operates before spraying.
DLock the gun trigger safety when you stop spraying.
DFollow the Pressure Relief Procedure on page 14 if the spray tip clogs and before cleaning,
checking or servicing the equipment.
DTighten all fluid connections before operating the equipment.
DCheck the hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.
Do not repair high pressure couplings; you must replace the entire hose.
DUse only Graco approved hoses. Do not remove the spring guard that is used to help protect the
hose from rupture caused by kinks or bends near the couplings.
MOVING PARTS HAZARD
Moving parts, such as the air motor piston, can pinch or amputate your fingers.
DKeep clear of all moving parts when starting or operating the pump.
DBefore servicing the equipment, follow the Pressure Relief Procedure on page 14 to prevent the
equipment from starting unexpectedly.

4 307933
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 5.
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.

5307933
Installation
General Information
NOTE: Reference numbers and letters in parentheses
in the text refer to the callouts in the figures and the
parts drawing.
NOTE: Always use Genuine Graco Parts and Acces-
sories, available from your Graco distributor. Refer to
Product Data Sheet for your pump, Form No. 305790.
If you supply your own accessories, be sure they are
adequately sized and pressure rated for your system.
NOTE: Fig. 2 is only a guide for selecting and installing
system components and accessories. Contact your
Graco distributor for assistance in designing a system
to suit your particular needs.
Grounding
WARNING
FIRE AND EXPLOSION HAZARD
Before operating the pump, ground the
system as explained below. Also read
the section FIRE OR EXPLOSION HAZ-
ARD on page 4.
1. Pump: use a ground wire and clamp (supplied).
See Fig. 1. Loosen the grounding lug locknut (W)
and washer (X). Insert one end of a 1.5 mm@(12
ga) minimum ground wire (39) into the slot in lug
(Z) and tighten the locknut securely. Connect the
other end of the wire to a true earth ground.
Fig. 1
W
X
39
Z
0864
2. Air and fluid hoses: use only electrically conductive
hoses.
3. Heaters, if used: refer to Viscon HP Heater manu-
al, 309524.
4. Air compressor: follow manufacturer’s recommen-
dations.
5. Spray gun: ground through connection to a prop-
erly grounded fluid hose and pump.
6. Fluid supply container: follow your local code.
7. Object being sprayed: follow your local code.
8. Solvent pails used when flushing: follow your local
code. Use only metal pails, which are conductive,
placed on a grounded surface. Do not place the
pail on a nonconductive surface, such as paper or
cardboard, which interrupts the grounding continu-
ity.
9. To maintain grounding continuity when flushing or
relieving pressure, hold a metal part of the spray
gun firmly to the side of a grounded metal pail,
then trigger the gun.

6 307933
Installation
Supplied Components
Refer to Fig. 2 for a typical installation of an air-
assisted system.
WARNING
A red-handled bleed-type master air valve (42) and
a fluid drain valve (4) are supplied in your system.
These accessories help reduce the risk of serious
injury, including fluid injection and splashing of fluid
in the eyes or on the skin, and injury from moving
parts if you are adjusting or repairing the pump.
The red-handled bleed-type master air valve re-
lieves air trapped between this valve and the pump
after the air is shut off. Trapped air can cause the
pump to cycle unexpectedly. Locate the valve close
to the pump.
The fluid drain valve assists in relieving fluid pres-
sure in the displacement pump, hose, and gun.
Triggering the gun to relieve pressure may not be
sufficient.
DThe red-handled bleed-type master air valve
(42) is required in your system to relieve air trapped
between it and the air motor when the valve is
closed (see the WARNING above). Be sure the
bleed valve is easily accessible from the pump, and
is located downstream from the air regulator.
DThe air regulator (2) controls pump speed and
outlet pressure by adjusting the air pressure to the
pump. Locate the regulator close to the pump, but
upstream from the red-handled bleed-type master
air valve (42).
DThe air manifold (43) has a swivel air inlet. It
mounts to the cart, and provides ports for connect-
ing lines to air-powered accessories.
DThe fluid filter (5) includes a 60 mesh (250 mi-
cron) stainless steel element to filter particles from
the fluid as it leaves the pump.
DThe fluid drain valve (4) is required in your sys-
tem to relieve fluid pressure in the hose and gun
(see the WARNING above).
DThe suction hose (16) and tube (17) allow the
pump to draw fluid from a 200 liter (55 gallon) pail.
System Accessories
Air and Fluid Hoses
Be sure all air hoses (B, K) and fluid hoses (G) are
properly sized and pressure-rated for your system.
Use only electrically conductive hoses.
1. Connect one end of the fluid line (G) to the filter
outlet swivel. Connect a fluid hose to each gun (H).
Install a fluid shutoff valve (P) at each gun drop.
Do not install the spray tip in the gun yet.
2. Close the red-handled bleed valve (42) and air
regulator (2). Connect the air hose (B) to the
swivel inlet of the air manifold (J). In air-assisted
systems, connect an air supply line (K) with regula-
tor (L) and shutoff valve (M) to the air inlet of each
gun.
Air Line Accessories
1. Install an air line filter (A) in the main air line, to
remove harmful dirt and moisture from the com-
pressed air supply.
2. Install a second bleed valve (Q) in the main air
line, to isolate the accessories for servicing.
3. Install a drain valve (W) at the bottom of each air
line drop, to drain off moisture.
4. To provide automatic lubrication of the air motor,
install an air line lubricator (C) downstream from
the red-handled bleed-type master air valve (42).
5. Install a pump runaway valve (F). The runaway
valve will automatically shut off the air to the pump
if the pump starts running too fast. A pump that
runs too fast can be seriously damaged.

7307933
Installation
B
E
42
2
G
H
43
39
1
3
4
5
16
17
C
F
N
L
M
K
J
Fig. 2
G
G
A
A
D
DD
KEY
SUPPLIED COMPONENTS
1Pump
2Pump Air Regulator
3Pump Wall Bracket
4Fluid Drain Valve (required)
5Fluid Filter
16 Suction Hose
17 Suction Tube
39 Ground Wire (required; see page 5 for installation instructions)
42 Red Handled Bleed-Type Master Air Valve (required, for pump)
43 Air Manifold
ACCESSORIES YOU MUST SUPPLY
AElectrically Conductive Air Hose
BAir Line Filter
CBleed-Type Master Air Valve (for accessories)
DAir Line Drain Valve
EAir Line Lubricator
FPump Runaway Valve
GElectrically Conductive Fluid Line
HAir-Assisted Spray Gun
JFluid Shutoff Valve
KElectrically Conductive Gun Air Hose
LGun Air Regulator
MGun Air Shutoff Valve
NFluid Pressure Relief Valve (required in low pressure
air-assisted systems)
H
L
M
K
J
N
G
G
04396B

8 307933
Installation
Model 237282 (for Ambient Temperature
Spray Applications)
NOTE: Refer to page 9 to convert Pump Model
237282 to a heated system.
1. Mount the pump wall bracket (3) 5 ft (1.5 m) above
the floor. Be sure the wall is strong enough to
support the weight of the pump and accessories,
fluid, hoses, and stress caused during pump
operation. Refer to Mounting Hole Layout on
page 20.
2. Connect the air and fluid hoses and the spray gun
as explained on page 6.
Fig. 3
Model 237282 Shown
3
4393B

9307933
Installation
Converting to a Heated System
To convert Model 237282 to a heated circulating
system, order the following parts. The heaters are
available in three voltages. Specify which voltage you
desire.
DTwo Viscon HP Fluid Heaters
– Model 245848 (120 V, single-phase, 19.2 amp)
– Model 245863 (240 V, single-phase, 16.7 amp)
– Model 245864 (480 V, single-phase, 8.30 amp)
DPart No. 502265, Bushing, reducer, pipe; qty 1
See Fig. 4.
DDual Heater Mounting Kit 222311
DCirculating Kit 222312
WARNING
The Viscon HP Heaters must be installed by a
qualified electrician in compliance with all state and
local codes and regulations, to reduce the risk of
electric shock or other serious injury during installa-
tion or operation.
The power supply must match the heaters’ require-
ments (see above). Refer to the Viscon HP Heater
Manual, 309524, for further information.
Fig. 4
R
Viscon HP Heater Cord 110160
12 gauge, rated at 105_C.
WARNING
Do not use in hazardous areas containing flam-
mable materials or fumes.
Airless Insulated Hose Kit 222263
25 ft. (7.6 m) nylon fluid hose for use with airless
heated systems. Includes an in-line fluid filter, circulat-
ing manifold, and 3 ft. (0.9 m) whip hose.
Air-Assisted Insulated Hose Kit 222264
25 ft. (7.6 m) nylon fluid hose for use with air-assisted
heated circulating systems. Includes an in-line fluid
filter, circulating manifold, 3 ft. (0.9 m) whip hose, and
air supply hose for spray gun.
Installing Dual Heater Mounting Kit 222311
WARNING
Before installing the heaters, dual heater mounting
kit and circulating kit, follow the Pressure Relief
Procedure on page 14. Disconnect all hoses from
the pump.
NOTE: Reference numbers marked with an asterisk
(for example, 18*) are included in kit 222311.
Apply pipe sealant (28*) to all male threads except at
swivel connections.
1. Be sure the wall is strong enough to support the
weight of the heaters, hoses, fluid, and stress
caused during operation. Locate the holes for the
heater wall brackets (18*) exactly as indicated on
page 20. Note that one heater will be mounted
above and slightly to the left of the other. Use the
heater wall brackets as templates to mark the wall.
2. Attach a heater wall bracket to each heater’s
mounting posts with the M8 x 1.25 screws and
lockwashers supplied with the heater (35).
3. Use M8 or 5/16 in. bolts of the appropriate length
and lockwashers (not supplied) to fasten the
heater brackets to the wall.
4. Remove the fluid filter (5) and long nipple (7) from
the pump fluid outlet. Do not remove the bushing
(9). Discard the nipple (7). See Fig. 5.

10 307933
Installation
5. Screw the street elbow (20*) into the bushing (9) at
the pump’s fluid outlet. Assemble the 3/4 npt
nipple (19*), check valve (21*), coupling (22*), and
swivel (51*) as shown in Fig. 6. The arrow on the
check valve must point down, toward the coupling.
Connect the street elbow (20*) to the nipple (19*).
6. Screw an elbow (24*) into the lower heater’s inlet.
Attach the heater hose (23*) to the elbow. Connect
the other end of the hose to the swivel (51*) com-
ing from the pump outlet.
7. Screw an elbow (24*) into the upper heater’s inlet.
Attach the second heater hose (23*) to the elbow.
Run this hose to the left of and behind the lower
heater.
8. Install a 3/8 npt nipple (25*) in the lower heater’s
outlet. Screw the rigid end of the union (26*) onto
this nipple, and screw the swivel end of the union
onto the free end of the second heater hose (23*).
9. Screw a 3/8 npt nipple (25*) into the upper heater’s
outlet. Screw the fluid filter (5) inlet onto this
nipple. Unscrew the adapter (6) from the filter
outlet. Screw the reducing nipple (27*) into the
filter outlet, and screw the union (26*) onto the
nipple. See Fig. 6.
3
1
7
5
6
4
8
17
Model 237282 Shown
Fig. 5
14
16
9
04395B